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linux/net
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Daniel Borkmann 8397bf7898 bpf: Zero former ARG_PTR_TO_{LONG,INT} args in case of error 
[ Upstream commit 4b3786a6c5 ]

For all non-tracing helpers which formerly had ARG_PTR_TO_{LONG,INT} as input
arguments, zero the value for the case of an error as otherwise it could leak
memory. For tracing, it is not needed given CAP_PERFMON can already read all
kernel memory anyway hence bpf_get_func_arg() and bpf_get_func_ret() is skipped
in here.

Also, the MTU helpers mtu_len pointer value is being written but also read.
Technically, the MEM_UNINIT should not be there in order to always force init.
Removing MEM_UNINIT needs more verifier rework though: MEM_UNINIT right now
implies two things actually: i) write into memory, ii) memory does not have
to be initialized. If we lift MEM_UNINIT, it then becomes: i) read into memory,
ii) memory must be initialized. This means that for bpf_*_check_mtu() we're
readding the issue we're trying to fix, that is, it would then be able to
write back into things like .rodata BPF maps. Follow-up work will rework the
MEM_UNINIT semantics such that the intent can be better expressed. For now
just clear the *mtu_len on error path which can be lifted later again.

Fixes: 8a67f2de9b ("bpf: expose bpf_strtol and bpf_strtoul to all program types")
Fixes: d7a4cb9b67 ("bpf: Introduce bpf_strtol and bpf_strtoul helpers")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/e5edd241-59e7-5e39-0ee5-a51e31b6840a@iogearbox.net
Link: https://lore.kernel.org/r/20240913191754.13290-5-daniel@iogearbox.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-10-17 15:21:00 +02:00
..
6lowpan net: 6lowpan: constify lowpan_nhc structures 2022-06-09 21:53:28 +02:00
9p net/9p: fix uninit-value in p9_client_rpc() 2024-06-16 13:41:38 +02:00
802 mrp: introduce active flags to prevent UAF when applicant uninit 2022-12-31 13:33:02 +01:00
8021q vlan: skip nested type that is not IFLA_VLAN_QOS_MAPPING 2024-01-31 16:17:04 -08:00
appletalk appletalk: Fix Use-After-Free in atalk_ioctl 2023-12-20 17:00:19 +01:00
atm atm: Fix Use-After-Free in do_vcc_ioctl 2023-12-20 17:00:17 +01:00
ax25 ax25: Replace kfree() in ax25_dev_free() with ax25_dev_put() 2024-06-21 14:35:32 +02:00
batman-adv batman-adv: Don't accept TT entries for out-of-spec VIDs 2024-07-05 09:31:58 +02:00
bluetooth Bluetooth: hci_sync: Ignore errors from HCI_OP_REMOTE_NAME_REQ_CANCEL 2024-10-17 15:20:42 +02:00
bpf bpf: Set run context for rawtp test_run callback 2024-06-21 14:35:33 +02:00
bpfilter uaccess: remove CONFIG_SET_FS 2022-02-25 09:36:06 +01:00
bridge net: bridge: br_fdb_external_learn_add(): always set EXT_LEARN 2024-09-12 11:10:22 +02:00
caif net: caif: Fix use-after-free in cfusbl_device_notify() 2023-03-17 08:50:24 +01:00
can can: bcm: Clear bo->bcm_proc_read after remove_proc_entry(). 2024-10-17 15:20:42 +02:00
ceph libceph: fix race between delayed_work() and ceph_monc_stop() 2024-07-18 13:18:41 +02:00
core bpf: Zero former ARG_PTR_TO_{LONG,INT} args in case of error 2024-10-17 15:21:00 +02:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-11 12:08:17 +02:00
dccp tcp/dccp: do not care about families in inet_twsk_purge() 2024-08-29 17:30:44 +02:00
devlink devlink: remove reload failed checks in params get/set callbacks 2023-09-23 11:11:01 +02:00
dns_resolver keys, dns: Fix size check of V1 server-list header 2024-01-25 15:27:38 -08:00
dsa net: mscc: ocelot: use ocelot_xmit_get_vlan_info() also for FDMA and register injection 2024-08-29 17:30:43 +02:00
ethernet ethernet: Add helper for assigning packet type when dest address does not match device address 2024-05-02 16:29:29 +02:00
ethtool ethtool: check device is present when getting link settings 2024-09-04 13:25:01 +02:00
hsr hsr: Simplify code for announcing HSR nodes timer setup 2024-05-17 11:56:13 +02:00
ieee802154 net: ieee802154: fix error return code in dgram_bind() 2022-10-07 09:29:17 +02:00
ife net: sched: ife: fix potential use-after-free 2024-01-01 12:38:56 +00:00
ipv4 fou: fix initialization of grc 2024-09-18 19:23:05 +02:00
ipv6 ipv6: avoid possible NULL deref in rt6_uncached_list_flush_dev() 2024-10-17 15:20:44 +02:00
iucv s390/iucv: fix receive buffer virtual vs physical address confusion 2024-08-29 17:30:39 +02:00
kcm kcm: Serialise kcm_sendmsg() for the same socket. 2024-08-29 17:30:44 +02:00
key net: af_key: fix sadb_x_filter validation 2023-08-23 17:52:32 +02:00
l2tp l2tp: fix lockdep splat 2024-08-14 13:52:44 +02:00
l3mdev l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu 2022-04-15 14:27:24 -07:00
lapb net: lapb: Use list_for_each_entry() to simplify code in lapb_iface.c 2021-06-08 16:31:25 -07:00
llc llc: call sock_orphan() at release time 2024-02-05 20:13:01 +00:00
mac80211 wifi: mac80211: use two-phase skb reclamation in ieee80211_do_stop() 2024-10-17 15:20:42 +02:00
mac802154 net: mac802154: Fix racy device stats updates by DEV_STATS_INC() and DEV_STATS_ADD() 2024-07-25 09:49:17 +02:00
mctp net: mctp: test: Use correct skb for route input check 2024-08-29 17:30:44 +02:00
mpls net: mpls: error out if inner headers are not set 2024-04-13 13:05:27 +02:00
mptcp mptcp: pm: Fix uaf in __timer_delete_sync 2024-09-18 19:23:03 +02:00
ncsi net/ncsi: Fix the multi thread manner of NCSI driver 2024-06-21 14:35:33 +02:00
netfilter netfilter: nf_tables: remove annotation to access set timeout while holding lock 2024-10-17 15:20:39 +02:00
netlabel calipso: fix memory leak in netlbl_calipso_add_pass() 2024-01-25 15:27:20 -08:00
netlink netlink: hold nlk->cb_mutex longer in __netlink_dump_start() 2024-08-29 17:30:36 +02:00
netrom netrom: Fix a memory leak in nr_heartbeat_expiry() 2024-06-27 13:46:18 +02:00
nfc nfc: nci: Fix handling of zero-length payload packets in nci_rx_work() 2024-06-12 11:03:53 +02:00
nsh nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). 2024-05-17 11:55:59 +02:00
openvswitch openvswitch: Set the skbuff pkt_type for proper pmtud support. 2024-06-12 11:03:51 +02:00
packet af_packet: Handle outgoing VLAN packets without hardware offloading 2024-08-03 08:49:31 +02:00
phonet phonet: fix rtm_phonet_notify() skb allocation 2024-05-17 11:56:12 +02:00
psample psample: Require 'CAP_NET_ADMIN' when joining "packets" group 2023-12-13 18:39:11 +01:00
qrtr net: qrtr: ns: Fix module refcnt 2024-06-12 11:03:32 +02:00
rds net:rds: Fix possible deadlock in rds_message_put 2024-08-29 17:30:20 +02:00
rfkill net: rfkill: gpio: set GPIO direction 2024-01-01 12:39:04 +00:00
rose net/rose: fix races in rose_kill_by_device() 2024-01-01 12:38:57 +00:00
rxrpc rxrpc: Fix response to PING RESPONSE ACKs to a dead call 2024-02-16 19:06:27 +01:00
sched sched: sch_cake: fix bulk flow accounting logic for host fairness 2024-09-12 11:10:18 +02:00
sctp sctp: fix association labeling in the duplicate COOKIE-ECHO case 2024-09-04 13:25:02 +02:00
smc net/smc: set rmb's SG_MAX_SINGLE_ALLOC limitation only when CONFIG_ARCH_NO_SG_CHAIN is defined 2024-08-03 08:49:04 +02:00
strparser strparser: pad sk_skb_cb to avoid straddling cachelines 2022-07-08 18:38:44 -07:00
sunrpc sunrpc: use the struct net as the svc proc private 2024-08-19 06:00:05 +02:00
switchdev net: bridge: switchdev: Skip MDB replays of deferred events on offload 2024-03-01 13:26:35 +01:00
tipc net: tipc: avoid possible garbage value 2024-10-17 15:20:44 +02:00
tls tls: fix missing memory barrier in tls_init 2024-06-12 11:03:53 +02:00
unix af_unix: Remove put_pid()/put_cred() in copy_peercred(). 2024-09-12 11:10:19 +02:00
vmw_vsock vsock/virtio: fix packet delivery to tap device 2024-04-10 16:28:25 +02:00
wireless wifi: cfg80211: fix two more possible UBSAN-detected off-by-one errors 2024-10-17 15:20:41 +02:00
x25 net/x25: fix incorrect parameter validation in the x25_getsockopt() function 2024-03-26 18:20:42 -04:00
xdp xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING 2024-04-17 11:18:23 +02:00
xfrm net: fix __dst_negative_advice() race 2024-06-16 13:41:40 +02:00
compat.c use less confusing names for iov_iter direction initializers 2023-02-09 11:28:04 +01:00
devres.c net: devres: Correct a grammatical error 2021-06-11 12:55:28 -07:00
Kconfig Remove DECnet support from kernel 2022-08-22 14:26:30 +01:00
Kconfig.debug net: make NET_(DEV|NS)_REFCNT_TRACKER depend on NET 2022-09-20 14:23:56 -07:00
Makefile devlink: move code to a dedicated directory 2023-08-30 16:11:00 +02:00
socket.c splice, net: Add a splice_eof op to file-ops and socket-ops 2024-01-10 17:10:27 +01:00
sysctl_net.c sysctl: treewide: drop unused argument ctl_table_root::set_ownership(table) 2024-08-11 12:35:51 +02:00