mlx5e_queue_start() deactivates and re-activates all channels but closes
only the queue being restarted. mlx5e_activate_txqsq() then
unconditionally calls netdev_tx_reset_queue(), zeroing the BQL counters
of channels that kept their in-flight TX WQEs. The next completion then
over-charges and trips the BUG_ON() in dql_completed():
kernel BUG at lib/dynamic_queue_limits.c:99!
RIP: 0010:dql_completed+0x23d/0x280
Call Trace:
<IRQ>
mlx5e_poll_tx_cq+0x668/0xa60
mlx5e_napi_poll+0x5b/0x7b0
net_rx_action+0x15a/0x580
Reset BQL only when the SQ has no bytes in flight (sq->cc == sq->pc).
In the case that reset is skipped, the outstanding WQEs will eventually
complete and rebalance the dql. The dql->limit is carried across the
reset.
Fixes: b2588ea40e ("net/mlx5e: Implement queue mgmt ops and single channel swap")
Signed-off-by: Bobby Eshleman <bobbyeshleman@meta.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260803-mlx5-bql-v3-1-a30d4c66fe1d@meta.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
bonding_init() ignores register_netdevice_notifier() errors and still
returns success, which can leave the bonding module loaded without its
netdev notifier registered.
Check the error and unwind prior initialization on failure.
This is a future looking check, register_netdevice_notifier()
only fails on double registration or if the registered notifier
itself returns an error.
Signed-off-by: Minhong He <heminhong@kylinos.cn>
Acked-by: Jay Vosburgh <jv@jvosburgh.net>
Link: https://patch.msgid.link/20260803090012.142638-1-heminhong@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
vrf_init_module() ignores register_netdevice_notifier() errors and
continues module initialization, which can leave VRF loaded without its
netdev notifier registered.
Check the error and fail module initialization early.
This is a future looking check, register_netdevice_notifier()
only fails on double registration or if the registered notifier
itself returns an error.
Signed-off-by: Minhong He <heminhong@kylinos.cn>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://patch.msgid.link/20260803090002.142453-1-heminhong@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
macvlan_init_module() ignores register_netdevice_notifier() errors and
continues module initialization, which can leave macvlan loaded without
its netdev notifier registered.
Check the error and fail module initialization early.
This is a future looking check, register_netdevice_notifier()
only fails on double registration or if the registered notifier
itself returns an error.
Signed-off-by: Minhong He <heminhong@kylinos.cn>
Link: https://patch.msgid.link/20260803085950.142325-1-heminhong@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
team_module_init() ignores register_netdevice_notifier() errors and
continues module initialization, which can leave the team module loaded
without its netdev notifier registered.
Check the error and fail module initialization early.
This is a future looking check, register_netdevice_notifier()
only fails on double registration or if the registered notifier
itself returns an error.
Signed-off-by: Minhong He <heminhong@kylinos.cn>
Link: https://patch.msgid.link/20260803085943.142261-1-heminhong@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
lapbeth_init_driver() ignores register_netdevice_notifier() errors and
always returns success, which can leave the module loaded without its
netdev notifier registered.
Check the error and remove the packet type on failure.
This is a future looking check, register_netdevice_notifier()
only fails on double registration or if the registered notifier
itself returns an error.
Signed-off-by: Minhong He <heminhong@kylinos.cn>
Link: https://patch.msgid.link/20260803085936.142160-1-heminhong@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
failover_init() ignores register_netdevice_notifier() errors and always
returns success, which can leave the failover module loaded without its
netdev notifier registered.
Return the notifier registration result directly so module initialization
fails when registration fails.
This is a future looking check, register_netdevice_notifier()
only fails on double registration or if the registered notifier
itself returns an error.
Signed-off-by: Minhong He <heminhong@kylinos.cn>
Link: https://patch.msgid.link/20260731030338.82508-1-heminhong@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
nexthop_init() ignores errors from register_pernet_subsys() and
register_netdevice_notifier(), so a partial initialization can appear
successful.
Check those steps and unwind prior registrations on failure.
Do not check rtnl_register_many(): for built-in code it panics on
failure, so the call cannot return an error to nexthop_init().
Cc: stable+noautosel@kernel.org # untested fix to unlikely error path
Signed-off-by: Minhong He <heminhong@kylinos.cn>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20260731025249.80026-1-heminhong@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
In __allocate_data_block(), when allocating a new data block
(dn->data_blkaddr == NULL_ADDR), inc_valid_block_count() is
called first to increment total_valid_block_count and i_blocks.
If the subsequent f2fs_allocate_data_block() fails, the function
returns the error directly without rolling back the
already-incremented block counts, causing a permanent leak.
Fix this by calling dec_valid_block_count() to undo the
increment before returning the error. The condition
old_blkaddr == NULL_ADDR precisely identifies the case where
inc_valid_block_count() was called.
Fixes: 7d009e048d ("f2fs: fix to handle segment allocation failure correctly")
Cc: <stable@vger.kernel.org>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Chen Changcheng <chenchangcheng@kylinos.cn>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
The sysfs store path already takes s_umount for GC thread control
entries, and ckpt_thread_ioprio is covered as well.
critical_task_priority also updates checkpoint or GC kthread scheduling
state, but it is not covered by that serialization. It can race with
remount or teardown paths that are stopping those threads.
Protect critical_task_priority sysfs writes with s_umount too.
Fixes: 52190933c3 ("f2fs: sysfs: introduce critical_task_priority")
Cc: stable@kernel.org
Signed-off-by: Wenjie Qi <qiwenjie@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
checkpoint_merge can be enabled even when no checkpoint merge thread is
running. A read-only mount is one case: f2fs does not start
f2fs_issue_ckpt there, but ckpt_thread_ioprio is still writable through
sysfs.
The ckpt_thread_ioprio store path updates the saved ioprio value and,
when checkpoint_merge is enabled, calls set_task_ioprio() for the
checkpoint thread. If cprc->f2fs_issue_ckpt is NULL, that dereferences a
NULL task pointer.
Protect ckpt_thread_ioprio sysfs writes with s_umount as well, so the
checkpoint thread cannot disappear under the store path while updating
its ioprio.
Fixes: e659206617 ("f2fs: add ckpt_thread_ioprio sysfs node")
Cc: stable@kernel.org
Signed-off-by: Wenjie Qi <qiwenjie@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
ovs_flow_cmd_new() preallocates the optional reply skb before it takes
ovs_mutex and before it knows which existing flow will be updated.
That is normally fine because the skb is sized from the request flow
identifier. That identifier also becomes the inserted flow's identifier.
For updates, however, a request with a UFID may miss the UFID lookup and
then fall back to the flow key lookup. That lookup can legitimately find
an existing key-identified flow. UFIDs are optional and the flow key is
the primary identifier.
For echoed replies, ovs_flow_cmd_fill_info() writes the matched flow's
identifier, not the request identifier used for the preallocation. A short
request UFID can therefore leave too little room for the key identifier.
The fill can then fail with -EMSGSIZE and hit the BUG_ON(error < 0) in the
update path.
Once the update target has been resolved, reallocate the reply skb if the
matched flow needs a larger reply than the request identifier allowed. Do
this before replacing the actions so the request can still fail cleanly if
the rare extra allocation fails.
Fixes: 74ed7ab926 ("openvswitch: Add support for unique flow IDs.")
Cc: stable@vger.kernel.org
Reported-by: Vega <vega@nebusec.ai>
Signed-off-by: Zhiling Zou <zhilinz@nebusec.ai>
Reviewed-by: Ilya Maximets <i.maximets@ovn.org>
Link: https://patch.msgid.link/f7bbd3c30ce81a39156e226b3872d73abed21d2f.1785644623.git.zhilinz@nebusec.ai
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
usbnet_probe() initializes max_mtu to ETH_MAX_MTU and only caps it
inside the if (info->bind) block. Drivers without a bind callback
never enter this block, so max_mtu stays at ETH_MAX_MTU.
QEMU's usb-net device (0x0525/0xa4a2) is claimed by the cdc_subset
driver which has no bind callback. The guest accepts any MTU from DHCP
(e.g. 65520 from passt), leading to TCP segments that exceed the
device's 2048-byte receive buffer and are silently dropped.
Initialize max_mtu to net->mtu at probe time and update it inside
the bind block.
Fixes: f77f0aee4d ("net: use core MTU range checking in USB NIC drivers")
Cc: jarod@redhat.com
Cc: stable@vger.kernel.org
Link: https://gitlab.com/qemu-project/qemu/-/issues/3268
Link: https://bugs.passt.top/show_bug.cgi?id=189
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Link: https://patch.msgid.link/20260731092711.857684-1-lvivier@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
bnge_fix_rings_count() returns 0 on success or a negative errno on failure
However, bnge_adjust_rings() stores its return value in a u16 variable,
causing negative error codes such as -ENOMEM to be converted to a large
positive value.
Use an int for the return code variable so that error values are
preserved and propagated correctly.
Fixes: 627c67f038 ("bng_en: Add resource management support")
Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Reviewed-by: Bhargava Marreddy <bhargava.marreddy@broadcom.com>
Link: https://patch.msgid.link/20260801100923.1498570-1-alok.a.tiwari@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Yangyu Chen says:
====================
net: atlantic: fix two ring teardown leaks
These are the two fixes from the page_pool conversion series [1],
resent against net as requested in the review of that series. The
page_pool conversion itself stays in net-next and is not part of this
posting; it depends on these fixes, but they stand on their own.
Both patches are unchanged from [1] apart from the collected
Reviewed-by tags, and each carries a Fixes tag and a Cc: stable with
the affected range (patch 1: v4.11+, patch 2: v5.2+). They apply and
were build- and runtime-tested independently of each other and of the
conversion.
Patch 1: aq_vec_deinit() drains the TX rings with a single
aq_ring_tx_clean() call, which is capped at AQ_CFG_TX_CLEAN_BUDGET
descriptors and stops at hw_head, frozen once the hardware and NAPI
have been stopped. Everything beyond that keeps its skb or xdp_frame
when the interface goes down and is lost when the buffer ring is
freed.
Patch 2: aq_ring_rx_deinit() only walks [sw_head, sw_tail). Since the
page reuse strategy was added, a cleaned RX buffer keeps its page for
reuse and refill is batched, so consumed but not yet reposted slots
accumulate in the [sw_tail, sw_head) gap and their pages and DMA
mappings are never released.
Reproduction logs for both leaks (as page_pool stalled shutdowns,
which is how they become visible) are in the notes of the respective
patches.
[1] https://lore.kernel.org/lkml/tencent_1F173E0FC1606D2AC704DC9C98AF10984607@qq.com/
====================
Link: https://patch.msgid.link/tencent_29B860317921D68DE77C718242DA418EB608@qq.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
aq_ring_rx_deinit() only walks [sw_head, sw_tail), the region posted to
hardware. Since the page reuse strategy was added, a cleaned RX buffer
keeps its page (and its DMA mapping) in the ring for reuse, and refill
is batched: aq_ring_rx_fill() returns early until AQ_CFG_RX_REFILL_THRES
slots are free. Slots that were consumed but not yet reposted therefore
sit in the complementary [sw_tail, sw_head) gap with a live page, and
the deinit walk never visits them: up to a refill batch worth of pages
and DMA mappings leak on every interface down.
Walk the whole ring instead and release whatever is still there. Also
bail out if the buffer ring is already gone: a partial
aq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so
aq_ptp_ring_deinit() still gets here on the unwind path.
Cc: stable@vger.kernel.org # v5.2+
Fixes: 46f4c29d9d ("net: aquantia: optimize rx performance by page reuse strategy")
Reviewed-by: Sukhdeep Singh <sukhdeeps@marvell.com>
Signed-off-by: Yangyu Chen <cyy@cyyself.name>
Acked-by: Mina Almasry <almasrymina@google.com>
Link: https://patch.msgid.link/tencent_607CBA8237DA438E36B844318B21538DE008@qq.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
aq_vec_deinit() drains the TX rings with a single aq_ring_tx_clean()
call, which frees at most AQ_CFG_TX_CLEAN_BUDGET (256) descriptors and
stops at hw_head, which no longer moves once aq_vec_stop() has stopped
the hardware and NAPI. Completed descriptors beyond the budget and
everything still posted in [hw_head, sw_tail) keep their skb or
xdp_frame when the interface goes down: aq_vec_ring_free() then frees
the buffer ring and the references are lost for good.
Today this is a silent memory leak on every interface down under
TX/XDP_TX load. With the conversion of the RX path to page_pool posted
for net-next it becomes much more visible: XDP_TX frames carry fragment
references on the RX ring's page_pool, so a single stranded frame keeps
the pool's inflight count above zero forever. page_pool_destroy() then
never completes, the pool is leaked together with its pages, and
"page_pool_release_retry() stalled pool shutdown" is warned every 60
seconds from that point on, on every ifdown, XDP detach or ring resize
under XDP_TX load.
Bring back aq_ring_tx_deinit() as it was before the removal and use it
for teardown again, with one extension: TX rings can hold xdp_frames
nowadays, so release those too. They are returned with
xdp_return_frame() since this runs in process context.
Fixes: eb36bedf28 ("net: aquantia: remove function aq_ring_tx_deinit")
Cc: stable@vger.kernel.org # v4.11+
Reviewed-by: Sukhdeep Singh <sukhdeeps@marvell.com>
Signed-off-by: Yangyu Chen <cyy@cyyself.name>
Acked-by: Mina Almasry <almasrymina@google.com>
Link: https://patch.msgid.link/tencent_EEDC35FAF2750A3A6A0B39BAE0E2C484860A@qq.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Since the referenced commit, changing the MTU on a running interface no
longer disconnects and reconnects the PHY; __stmmac_release() merely
stops phylink, which also suspends the PHY (BMCR power-down) when WoL
is not enabled. __stmmac_open() then performs the DMA software reset in
stmmac_hw_setup() before phylink_start() resumes the PHY again.
IEEE 802.3 22.2.4.1.5 allows a PHY to stop its receive clock while
powered down, and stmmac requires a running receive clock for the DMA
software reset to complete (the phylink config sets mac_requires_rxc).
On such setups, e.g. the RK3566-based Home Assistant Green with an
RTL8211F-VD PHY in RGMII mode, any runtime MTU change now times out and
leaves the interface dead:
rk_gmac-dwmac fe010000.ethernet end0: Failed to reset the dma
rk_gmac-dwmac fe010000.ethernet end0: stmmac_hw_setup: DMA engine initialization failed
rk_gmac-dwmac fe010000.ethernet end0: __stmmac_open: Hw setup failed
rk_gmac-dwmac fe010000.ethernet end0: failed reopening the interface after MTU change
In the field this is triggered by NetworkManager applying an MTU while
activating the connection, breaking networking entirely. The same
regression has also been reported on i.MX8MP and reproduced on SoCFPGA
based systems.
Resume the PHY in __stmmac_open() before the hardware setup, making it
the counterpart of the phylink_stop() in __stmmac_release(), like
stmmac_resume() already does for the same reason. phylink_start() also
resumes the PHY, but only after stmmac_hw_setup(), and it cannot be
moved before the hardware setup since it may bring the link up
immediately from a workqueue, racing with the initialization (see the
comment in stmmac_resume()). For the regular ndo_open path the PHY has
just been attached and is not suspended, in which case
phylink_prepare_resume() does nothing.
Fixes: db299a0c09 ("net: stmmac: move PHY handling out of __stmmac_open()/release()")
Link: https://github.com/home-assistant/operating-system/issues/4858
Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20260803095156.132827-1-stefan@agner.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The memory allocated for struct vcap_rule_internal, keyfields and
actionfields inside vcap_dup_rule() are not freed in some of the error
paths in vcap_decode_rule(). Fix that by calling vcap_free_rule().
Compile tested only. Issue found using a prototype static analysis tool
built on top of the LLVM compiler infrastructure.
Cc: stable+noautosel@kernel.org # untested fix to unlikely driver error path
Reviewed-by: Joe Damato <joe@dama.to>
Signed-off-by: Abdun Nihaal <nihaal@cse.iitm.ac.in>
Link: https://patch.msgid.link/20260801055507.47534-1-nihaal@cse.iitm.ac.in
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Allison Henderson says:
====================
net/rds: Bug fix ports
This is a small set of net/rds bug fixes and ports from uek to upstream
rds. I've been working on extending the rds selftest case, but need to
stabilize a few more bugs and the first few fall into net with Fixes
tags. I decided to leverage fable for this set and I thought the ports we
clean and well explained.
This series fixes a sleeping-in-softirq bug in the RDS message free
path, a use-after-free of the RDS socket through long-lived MR
references, a message leak in the rds_send_xmit() drop path, and - new
in v4 - a pinned-page leak in the IB transport's MR teardown.
The first three patches are ports of fixes carried in the Oracle UEK
kernel, reworked where the UEK approach no longer applies upstream.
====================
Link: https://patch.msgid.link/20260730041629.3512480-1-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The pages backing an RDS memory region are pinned in __rds_rdma_map()
with rds_pin_pages(), which uses pin_user_pages_fast(): each page's
refcount is biased by GUP_PIN_COUNTING_BIAS to account the pin. The
scatterlist is then handed to the IB transport, and the transport
releases the pages in __rds_ib_teardown_mr() with
set_page_dirty(page);
put_page(page);
put_page() drops a single reference instead of removing the pin bias,
so every MR teardown permanently strands the remaining references and
the pages are never freed - a userspace-triggerable memory leak of up
to RDS_MAX_MSG_SIZE per RDS_GET_MR/RDS_GET_MR_FOR_DEST call.
The conversion to the pin API updated the unpin sites in rdma.c but
missed this one on the transport side. Release the pages with
unpin_user_pages_dirty_lock(), which removes the pin bias and also
dirties the page under the folio lock, closing the truncation race
that a bare set_page_dirty() leaves open.
Dirtying under the folio lock can sleep, which is safe in every path
that reaches __rds_ib_teardown_mr(): the registration-reuse path
(rds_ib_map_frmr()) runs in syscall context, and the pool flush
(rds_ib_unreg_frmr()) runs under pool->flush_lock, a mutex, and
already sleeps in rds_ib_post_inv(). The WARN_ON that guarded the
old irq-context set_page_dirty() case is dropped along with it.
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260730041629.3512480-5-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When rds_send_xmit() picks the next message off cp_send_queue it takes
its own reference with rds_message_addref(). If the message then hits
the never-retransmit check (RDS_MSG_FLUSH, or an RDMA op that was
already retransmitted), it is moved to the local to_be_dropped list and
that reference is dropped after the batch.
However, if RDS_MSG_ON_CONN has already been cleared, the message is
not added to to_be_dropped and the reference taken above is never
dropped: cp_xmit_rm has not been set at this point, so the loop simply
abandons rm and the rds_message (and everything it pins: pages, MRs,
notifiers) leaks after an RDMA error.
The only other places that clear RDS_MSG_ON_CONN are
rds_send_path_drop_acked() and rds_send_drop_to(), and both can run
while rds_send_xmit() has dropped cp_lock between moving the message
to cp_retrans and re-taking the lock in the never-retransmit check:
rds_send_path_drop_acked() can ack away a message that already sat on
cp_retrans - the RDS_MSG_RETRANSMITTED case above - and
rds_send_drop_to() runs on socket close. Both unlink the message
under cp_lock and put their own reference, leaving the xmit-path
reference stranded.
Drop the reference directly in that case.
This mirrors Oracle UEK commit "net/rds: fix rds_message memleak in
rds_send_xmit".
Signed-off-by: Gerd Rausch <gerd.rausch@oracle.com>
Signed-off-by: Sharath Srinivasan <sharath.srinivasan@oracle.com>
[achender: port to net-next; update commit message, checkpatch nits]
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260730041629.3512480-4-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Each rds_mr stores a bare back pointer to the socket that created it
(mr->r_sock) but takes no reference on it. When the mr is destroyed it
references the rs. Hence, provisions must be made to avoid the rs
being destroyed before all mrs referencing it have been destroyed.
The MR itself is refcounted, and in-flight messages legitimately hold
MR krefs that can outlive the socket: rds_release() drops the rb-tree
references via rds_rdma_drop_keys(), but a send completion arriving
afterwards drops the final message reference from the CQ handler and
ends up in
rds_message_purge()
__rds_put_mr_final()
rds_destroy_mr() -> takes rs->rs_rdma_lock
dereferencing a socket that may already have been freed.
Oracle UEK fixed the same use-after-free ("rds: Add proper refcnt when
an RDS MR references an RDS Socket") after seeing crashes of the form:
PF: supervisor write access in kernel mode
_raw_spin_lock_irqsave+0x4a/0x6a
__rds_put_mr_final+0x2c/0xe0 [rds]
rds_message_purge+0x13c/0x150 [rds]
rds_message_put+0x39/0x54 [rds]
rds_ib_send_cqe_handler+0x147/0x3dd [rds_rdma]
To fix this, take a socket reference when an MR is created and drop it
when the final MR kref goes away. The reference cycle is broken by
rds_release(), which always runs rds_rdma_drop_keys() on close. So the
socket reference held by an MR never prevents release, it only delays
sk_free() until the last MR user is done.
The hold sits next to kref_init() at both allocation sites -
__rds_rdma_map() and the on-demand-paging path in
rds_cmsg_rdma_args() - so every MR owns exactly one socket reference
from the moment it becomes kref-managed. For that to work on the ODP
path, its get_mr() error handling is converted from a bare kfree() to
kref_put(..., __rds_put_mr_final), with r_trans_private cleared first
since it holds an ERR_PTR there; both sites then tear down through
the same path and a future error-path change cannot silently leak or
double-drop the reference.
Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com>
[achender: port to net-next (sock_hold/sock_put in place of the UEK
rds_sock_addref/rds_sock_put helpers); also balance the reference on
the rds_cmsg_rdma_args() ODP path and unify its error path with
__rds_put_mr_final(); update commit message]
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260730041629.3512480-3-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
rds_rdma_free_op() and rds_atomic_free_op() are reached from the IB
send completion path via
rds_ib_tasklet_fn_send()
rds_ib_send_cqe_handler()
rds_message_put()
rds_message_purge()
rds_rdma_free_op() / rds_atomic_free_op()
which runs in tasklet (softirq) context. Both functions unpin the
user pages of the op with unpin_user_pages_dirty_lock(), which uses
set_page_dirty_lock() and thus may take the folio lock and sleep.
Sleeping in softirq context is not allowed and can deadlock or crash.
Dirtying the pages with the non-sleeping set_page_dirty() instead
would just trade one bug for another, as pointed out during review:
the pinned range can be file-backed. rds_pin_pages() pins with
FOLL_LONGTERM, which refuses fs-dax but takes the page-cache pages
of a MAP_SHARED file mapping just fine, and RDS does not restrict
what memory the caller registers as an RDMA destination.
For a file-backed page, set_page_dirty() from a tasklet can take
non-irq-safe filesystem locks (e.g. mapping->i_private_lock and
inode->i_lock in block_dirty_folio()) and deadlock against the task
it interrupted. Without the folio lock, it races with truncation
clearing folio->mapping, which is the race set_page_dirty_lock()
exists to close. The pre-pin_user_pages() version of this code
dirtied pages that way from the tasklet, so that bug is older than
the sleeping unpin.
The page dirtying therefore has to move to process context, not
merely avoid the folio lock. When the final rds_message_put() runs
in atomic context, rds_rdma_free_op() and rds_atomic_free_op() now
leave the op's pages pinned and flag the op. Later, rds_message_put()
hands the message to a work item that unpins the flagged ops' pages
and frees the message from process context. Here,
unpin_user_pages_dirty_lock() is safe outside the atomic context.
Everything else keeps running in the caller's context exactly as
before: the rest of the purge - the zerocopy completion, the socket
put and the MR reference drops - as well as RDMA writes, whose pages
the remote side only reads and which unpin without dirtying,
everything on rds_tcp, and final puts that already happen in process
context (socket close, connection teardown).
Deferring only the unpin means the work item touches nothing but the
pinned pages and the rds module's own memory: it cannot call back
into a transport module, so it changes nothing about the transports'
shutdown and unload ordering. rds_exit() drains any pending unpin
work via destroy_workqueue(rds_wq) before the module goes away.
The Oracle UEK kernel avoids the sleeping unpin by calling
set_page_dirty() directly from the tasklet, which is subject to the
file-backed page problem above, so this deliberately does not follow
UEK here.
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260730041629.3512480-2-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* use rcu_dereference_bh() instead of rcu_access_pointer() where the
pointer is actually dereferenced
* ensure TCP global variables are initialized before they can be
accessed via netlink (e.g. when attaching a TCP socket)
* actually disable IPv4 redirects on multipeer interfaces (the
previous attempt was a no-op and did not survive netns moves)
* hash a floated peer by its transport identity only, consistently
with the add and lookup paths
* zero the sockaddr padding before learning a floated endpoint so it
does not leak into the by_transp_addr hash key
* ensure the socket is owned by ovpn before dereferencing
sk_user_data
* rehash a peer in the by_transp_addr table when its remote endpoint
is updated via CMD_PEER_SET
* avoid re-adding to the hashtables a peer that was concurrently
removed (use-after-free)
* limit keepalive values to one day to avoid overflowing the
delayed-work delay on 32-bit systems
* add the missing rtnl_link_ops->get_size callback so link messages
account for the nested mode attribute
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Merge tag 'ovpn-net-20260730' of https://github.com/OpenVPN/ovpn-net-next
Antonio Quartulli says:
====================
Included fixes:
* use rcu_dereference_bh() instead of rcu_access_pointer() where the
pointer is actually dereferenced
* ensure TCP global variables are initialized before they can be
accessed via netlink (e.g. when attaching a TCP socket)
* actually disable IPv4 redirects on multipeer interfaces (the
previous attempt was a no-op and did not survive netns moves)
* hash a floated peer by its transport identity only, consistently
with the add and lookup paths
* zero the sockaddr padding before learning a floated endpoint so it
does not leak into the by_transp_addr hash key
* ensure the socket is owned by ovpn before dereferencing
sk_user_data
* rehash a peer in the by_transp_addr table when its remote endpoint
is updated via CMD_PEER_SET
* avoid re-adding to the hashtables a peer that was concurrently
removed (use-after-free)
* limit keepalive values to one day to avoid overflowing the
delayed-work delay on 32-bit systems
* add the missing rtnl_link_ops->get_size callback so link messages
account for the nested mode attribute
* tag 'ovpn-net-20260730' of https://github.com/OpenVPN/ovpn-net-next:
ovpn: fix incorrect use of rcu_access_pointer()
ovpn: ensure TCP vars are initialized first
ovpn: disable IPv4 redirects on MP interfaces
ovpn: hash floated peer by transport identity only
ovpn: zero-initialize sockaddr before learning a floated endpoint
ovpn: ensure socket is owned by ovpn before deref sk_user_data
ovpn: rehash peer in by_transp_addr table on CMD_PEER_SET
ovpn: skip rehash for peers already removed from by_id
ovpn: limit keepalive values to one day
ovpn: add missing rtnl_link_ops->get_size callback
====================
Link: https://patch.msgid.link/20260730094624.4102963-1-antonio@openvpn.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The Microchip MCP47A1 is a 6-bit volatile Digital-to-Analog converter
which communicates via I2C.
Signed-off-by: Joshua Crofts <joshua.crofts1@gmail.com>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
The Microchip MCP47A1 is a 6-bit volatile Digital-to-Analog converter
which communicates via I2C.
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Joshua Crofts <joshua.crofts1@gmail.com>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
The add/remove eprobe test installs an eprobe for the openat syscall and
runs ls. It checks the filenames that were opened by ls against a
whitelist and a blacklist.
Commit 206b25c090 ("tracing: eprobe: read the complete FILTER_PTR_STRING
pointer") fixed access to some string fields in eprobes. This triggers
test failures as the blacklist does not allow relative paths for the
openat parameters.
What makes this test unstable is the fact that the openat calls vary a
lot between different systems.
Refactor the test to make it more robust. "cd <directory>" will issue a
chdir syscall with the target directory as parameter. Set an eprobe on
the sys_enter_chdir event and filter for the exact directory name. Allow
(fault) as fallback.
Link: https://lore.kernel.org/all/20260804194705.760893-1-martin@kaiser.cx/
Fixes: 206b25c090 ("tracing: eprobe: read the complete FILTER_PTR_STRING pointer")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202607151010.b68428e1-lkp@intel.com
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Sashiko reports that we incorrectly disable isolation in the setup
loop while what we want to do is to enable it.
Enable it by unconditionally setting the enable bit 0 in
rtl8366rb_port_set_isolation() so a mask of 0 when passed in
will enable isolation and isolate from ALL ports.
Fix up the comments so it is clear what is going on, including a
missing word in the helper function.
Reported-by: Paolo Abeni <pabeni@redhat.com>
Closes: https://sashiko.dev/#/patchset/20260630-rtl8366rb-improvements-v2-0-05eb9d6a37f5%40kernel.org
Signed-off-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260731-rtl8366rb-fixes-v4-1-fbf0c95b829a@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
airoha_alloc_gdm_device() initializes the txq_lock[] array iterating
over ARRAY_SIZE(dev->txq_lock). ARRAY_SIZE() expands to
sizeof(dev->txq_lock) / sizeof((dev->txq_lock)[0]), but on UP builds
(CONFIG_SMP unset, CONFIG_DEBUG_SPINLOCK unset) arch_spinlock_t is an
empty struct, so sizeof(spinlock_t) is zero and the expression is a
compile-time division by zero (undefined behavior), reported by clang
as "division by zero is undefined [-Wdivision-by-zero]".
Since the array is statically sized with AIROHA_NUM_NETDEV_TX_RINGS,
use the named constant as loop bound instead of ARRAY_SIZE().
Fixes: 78a35725e5 ("net: airoha: defer GDM3/GDM4 WAN mode and GDM2 loopback to QoS offload")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202607311850.6p0ZUVq4-lkp@intel.com/
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://patch.msgid.link/20260731-airoha-spinlock-array-fix-v1-1-863a7e239a5f@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Component already has component->dev. No longer need to set dev
on soc_component_initialize(). Remove it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/87h5lqrz6z.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
No one is calling snd_soc_component_initialize() / snd_soc_add_component()
calling from driver. Makes them local functions.
It renames
- snd_soc_add_component()
+ snd_soc_component_add()
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/87ik66rz73.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
It is calling snd_soc_component_initialize() / snd_soc_add_component().
We can now use snd_soc_register_component() instead.
It is using container_of() to get kunit_soc_component from component, but
will not be able to use it when capsuling has done.
We can use snd_soc_component_to_priv() instead.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/87jyqmrz76.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
it is calling snd_soc_component_initialize() / snd_soc_add_component().
We can now use snd_soc_register_component() instead.
It is using container_of() to get dmaengine_pcm from component, but
will not be able to use it when capsuling has done.
We can now use snd_soc_component_to_priv() instead.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/87ldb2rz79.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
It is calling snd_soc_component_initialize() / snd_soc_add_component().
We can now use snd_soc_register_component() instead.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/87mrvirz7d.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
It is calling snd_soc_component_initialize() / snd_soc_add_component().
We can now use snd_soc_register_component() instead.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/87o6fyrz7h.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
It is calling snd_soc_component_initialize() / snd_soc_add_component().
We can now use snd_soc_register_component() instead.
It is using container_of() to get avs_soc_component from component, but
will not be able to use it when capsuling has done.
We can now use snd_soc_component_to_priv() instead.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/87pl0erz7k.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
struct snd_soc_component will be capsuled soon, its member will not be
able to access from non soc-component.c.
Basically, each drivers are using dev_{set/get}_drvdata() to set own data,
but it is not enough. Let's add .priv.
Add snd_soc_component_{set/to}_priv() to access priv.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/87qzkurz7o.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
struct snd_soc_component will be capsuled soon, its member will not be
able to access from non soc-component.c.
Add snd_soc_component_{set_}name() to access name.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/87se5arz7s.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
We have snd_soc_register_component() (A), but we can't setup component
specific setting, like name, etc from driver, because component
itself is allocated in that function (x).
(A) int snd_soc_register_component(...)
{
...
(x) component = devm_kzalloc(...);
if (!component)
return -ENOMEM;
(B) ret = snd_soc_component_initialize(...);
if (ret < 0)
return ret;
(C) return snd_soc_add_component(...);
}
So each driver needs to use snd_soc_component_{initialize/add}() (= B/C)
instead of using snd_soc_register_component() (A), but it looks
unbalanced with its paired unregiser function.
Let's merge (B) and (C) into new register function, and allows component
as parameter. We can use both
snd_soc_register_component(dev, ...); // already exists
snd_soc_register_component(component, ...); // new function
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/87tspqrz7w.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
struct snd_soc_component will be capsuled soon, then, we will can't alloc
it. Adds snd_soc_component_alloc() to alloc it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/87v7a6rz80.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
soc_component_field_shift() is used from
snd_soc_component_{read/write}_field(). It is better to located around
them.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/87wlumrz83.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
IFLA_MACVLAN_BC_QUEUE_LEN accepts any u32 and becomes
port->bc_queue_len_used, the only bound on port->bc_queue. rtnetlink checks
CAP_NET_ADMIN against the target netns only, so a user who unshares a
user+net namespace, creates a veth and puts a macvlan on it can set the
backlog to 0xffffffff and flood broadcast frames until the host dies:
Out of memory: Killed process 141 (su) UID:0
Kernel panic - not syncing: System is deadlocked on memory
Call Trace:
vpanic (kernel/panic.c:650)
panic (kernel/panic.c:787)
out_of_memory (mm/oom_kill.c:1166)
__alloc_frozen_pages_noprof (mm/page_alloc.c:4914)
alloc_pages_mpol (mm/mempolicy.c:2490)
folio_alloc_noprof (mm/mempolicy.c:2591)
filemap_fault (mm/filemap.c:3565)
A fixed upper bound does not work. Deployments carrying 600-800 real-time
audio streams run bc_queue_len=100000, and no constant serves both cases:
the queue counts skbs, not bytes, and the frame size is attacker-chosen too
(up to ETH_MAX_MTU on a veth the caller creates).
Gate the elevated range on CAP_NET_ADMIN in the initial user namespace
instead. A backlog of that size is a host-wide tuning decision, and an
unprivileged owner of a namespace it created itself should not be able to
make it; privileged configurations keep working unchanged..
Cc: stable+noautosel@kernel.org # local DoS by userns are a dime a dozen
Reported-by: AutonomousCodeSecurity@microsoft.com
Link: https://lore.kernel.org/r/20260706212556.3199234-1-xmei5@asu.edu
Signed-off-by: Xiang Mei (Microsoft) <xmei5@asu.edu>
Link: https://patch.msgid.link/20260729200621.2521588-1-xmei5@asu.edu
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
A potential invalid storage access issue can occur after replacing a
cgroup bpf prog.
This occurs in the following scenario:
1. prog1 with storage is attached to a cgroup in multi-attach mode.
2. prog1 is replaced with prog2 using BPF_F_REPLACE in multi-attach
mode, but fails midway (e.g. in bpf_trampoline_link_cgroup_shim or
update_effective_progs).
3. A new prog3 is attached to the cgroup in multi-attach mode.
The reason is that __cgroup_bpf_attach overwrites pl->storage with the
new storage prior to attachment completion. When attachment fails
midway, the cleanup path calls bpf_cgroup_storages_free(new_storage) to
free the newly allocated storage, but fails to restore pl->storage back
to old_storage.
Consequently, the still-active prog1 holds invalid or dangling storage
pointers, leading to an invalid memory access when prog1 executes and
calls bpf_get_local_storage. Additionally, original pl->flags and
cgrp->bpf.flags[atype] are left unrestored.
Fix this by saving old_pl_flags, old_storage, and old_flags prior to the
update, and properly restoring all of them in the cleanup path on error.
Fixes: 7d9c342789 ("bpf: Make cgroup storages shared between programs on the same cgroup")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Signed-off-by: Pu Lehui <pulehui@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Link: https://lore.kernel.org/bpf/20260803013934.4036646-1-pulehui@huaweicloud.com
When a TRANS2 response is split across multiple secondary packets,
coalesce_t2() assembles the payload into the large response buffer.
Two bugs cause SendReceive() to copy only a small fraction of the
assembled buffer into the caller's output buffer.
This manifests when listing a large directory on an SMB1 share
(observed against Windows XP); the first getdents returns only
partial results, and subsequent getdents returns EINVAL.
Bug 1: coalesce_t2() computes the coalesced size as:
*pdu_len += total_in_src;
cifs_demultiplex_thread() resets *pdu_len to each secondary's own
pdu_length before calling coalesce_t2(), so this accumulates from
the wrong baseline on every secondary after the first.
Bug 2: after reassembly, cifs_demultiplex_thread() sets
mid->resp_buf_size to the final secondary's raw packet size. This
value is later used as the memcpy length, so only a portion of the
coalesced response is copied.
Fix both by replacing the stale *pdu_len arithmetic with
smbCalcSize(), which reads the BCC field that coalesce_t2()
maintains correctly throughout reassembly.
Fixes: 83bfbd0bb9 ("cifs: Remove the RFC1002 header from smb_hdr")
Cc: stable@vger.kernel.org
Signed-off-by: Frank Sorenson <sorenson@redhat.com>
Reviewed-by: Paulo Alcantara <pc@manguebit.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Use devm_spi_alloc_host() instead of spi_alloc_host() so that the spi
controller is automatically freed on probe failure or device removal.
This lets us eliminate the err_put_host label and goto error path in
probe, as well as the spi_controller_put() call in remove.
It's also a bit weird as everything in probe is using devm except the
first allocating function. Might fix an ordering issue on teardown.
Assisted-by: opencode:big-pickle
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20260727201543.18857-1-rosenp@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
I'm transitioning to a new email, add mapping and update MAINTAINERS
entries to keep email up to date.
Signed-off-by: Maxwell Doose <maxwell@maxwelld.cc>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
The enable_mask struct member keeps track of which sensors are enabled in
the IMU. When enabling and disabling the sensor fusion functionality, the
driver does not properly update this struct member. This prevents a correct
calculation of the number of samples that should be read from the hardware
FIFO; as a result, reads from the FIFO can be unnecessarily split into
multiple transactions, some of which can read past the FIFO length.
Fixes: cd4e1141bf ("iio: imu: st_lsm6dsx: Add support for rotation sensor")
Signed-off-by: Francesco Lavra <flavra@baylibre.com>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
