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Daniel Borkmann 2a72b2ce9e bpf: Add MEM_WRITE attribute 
commit 6fad274f06 upstream.

Add a MEM_WRITE attribute for BPF helper functions which can be used in
bpf_func_proto to annotate an argument type in order to let the verifier
know that the helper writes into the memory passed as an argument. In
the past MEM_UNINIT has been (ab)used for this function, but the latter
merely tells the verifier that the passed memory can be uninitialized.

There have been bugs with overloading the latter but aside from that
there are also cases where the passed memory is read + written which
currently cannot be expressed, see also 4b3786a6c5 ("bpf: Zero former
ARG_PTR_TO_{LONG,INT} args in case of error").

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20241021152809.33343-1-daniel@iogearbox.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: BRUNO VERNAY <bruno.vernay@se.com>
Signed-off-by: Hugo SIMELIERE <hsimeliere.opensource@witekio.com>
Stable-dep-of: 8ea607330a ("bpf: Fix overloading of MEM_UNINIT's meaning")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-01-17 13:34:43 +01:00
..
6lowpan net: 6lowpan: constify lowpan_nhc structures 2022-06-09 21:53:28 +02:00
9p 9p/xen: fix release of IRQ 2024-12-14 19:54:08 +01:00
802 net: 802: LLC+SNAP OID:PID lookup on start of skb data 2025-01-17 13:34:38 +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: Do not let TT changes list grows indefinitely 2024-12-19 18:08:52 +01:00
bluetooth Bluetooth: hci_sync: Fix not setting Random Address when required 2025-01-17 13:34:39 +01:00
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 netfilter: br_netfilter: fix panic with metadata_dst skb 2024-10-17 15:22:19 +02:00
caif net: caif: Fix use-after-free in cfusbl_device_notify() 2023-03-17 08:50:24 +01:00
can net: af_can: do not leave a dangling sk pointer in can_create() 2024-12-14 19:54:41 +01:00
ceph libceph: fix race between delayed_work() and ceph_monc_stop() 2024-07-18 13:18:41 +02:00
core bpf: Add MEM_WRITE attribute 2025-01-17 13:34:43 +01:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-11 12:08:17 +02:00
dccp dccp: Fix memory leak in dccp_feat_change_recv 2024-12-14 19:54:22 +01:00
devlink devlink: bump the instance index directly when iterating 2024-10-22 15:56:43 +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: Fix wrong mod state in case of verbose and no_mask bitset 2024-12-14 19:54:23 +01:00
hsr net: hsr: avoid potential out-of-bound access in fill_frame_info() 2024-12-14 19:54:21 +01:00
ieee802154 net: ieee802154: do not leave a dangling sk pointer in ieee802154_create() 2024-12-14 19:54:41 +01:00
ife net: sched: ife: fix potential use-after-free 2024-01-01 12:38:56 +00:00
ipv4 tcp: Annotate data-race around sk->sk_mark in tcp_v4_send_reset 2025-01-17 13:34:39 +01:00
ipv6 ila: serialize calls to nf_register_net_hooks() 2025-01-09 13:30:03 +01:00
iucv s390/iucv: MSG_PEEK causes memory leak in iucv_sock_destruct() 2024-12-14 19:53:50 +01:00
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 genetlink: hold RCU in genlmsg_mcast() 2024-11-01 01:56:00 +01:00
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 net: llc: reset skb->transport_header 2025-01-09 13:30:01 +01:00
mac80211 wifi: mac80211: wake the queues in case of failure in resume 2025-01-09 13:30:03 +01:00
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: handle skb cleanup on sock_queue failures 2025-01-09 13:29:57 +01:00
mpls net: mpls: error out if inner headers are not set 2024-04-13 13:05:27 +02:00
mptcp mptcp: don't always assume copied data in mptcp_cleanup_rbuf() 2025-01-09 13:30:07 +01:00
ncsi net/ncsi: Fix the multi thread manner of NCSI driver 2024-06-21 14:35:33 +02:00
netfilter netfilter: conntrack: clamp maximum hashtable size to INT_MAX 2025-01-17 13:34:39 +01:00
netlabel calipso: fix memory leak in netlbl_calipso_add_pass() 2024-01-25 15:27:20 -08:00
netlink sock_diag: add module pointer to "struct sock_diag_handler" 2024-12-14 19:53:32 +01:00
netrom netrom: check buffer length before accessing it 2025-01-09 13:30:01 +01:00
nfc nfc: llcp: fix nfc_llcp_setsockopt() unsafe copies 2024-11-22 15:37:33 +01:00
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: fix vlan_get_protocol_dgram() vs MSG_PEEK 2025-01-09 13:30:02 +01:00
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: Update packets cloning when broadcasting 2024-10-17 15:21:13 +02:00
rds net:rds: Fix possible deadlock in rds_message_put 2024-08-29 17:30:20 +02:00
rfkill net: rfkill: gpio: Add check for clk_enable() 2024-12-14 19:53:33 +01:00
rose net/rose: fix races in rose_kill_by_device() 2024-01-01 12:38:57 +00:00
rxrpc rxrpc: Improve setsockopt() handling of malformed user input 2024-12-14 19:53:52 +01:00
sched sched: sch_cake: add bounds checks to host bulk flow fairness counts 2025-01-17 13:34:40 +01:00
sctp sctp: sysctl: plpmtud_probe_interval: avoid using current->nsproxy 2025-01-17 13:34:42 +01:00
smc net/smc: check return value of sock_recvmsg when draining clc data 2024-12-27 13:52:54 +01:00
strparser strparser: pad sk_skb_cb to avoid straddling cachelines 2022-07-08 18:38:44 -07:00
sunrpc sunrpc: clear XPRT_SOCK_UPD_TIMEOUT when reset transport 2024-12-14 19:54:09 +01:00
switchdev net: bridge: switchdev: Skip MDB replays of deferred events on offload 2024-03-01 13:26:35 +01:00
tipc tipc: fix NULL deref in cleanup_bearer() 2024-12-19 18:08:52 +01:00
tls tls: Fix tls_sw_sendmsg error handling 2025-01-17 13:34:39 +01:00
unix sock_diag: add module pointer to "struct sock_diag_handler" 2024-12-14 19:53:32 +01:00
vmw_vsock sock_diag: add module pointer to "struct sock_diag_handler" 2024-12-14 19:53:32 +01:00
wireless wifi: nl80211: fix NL80211_ATTR_MLO_LINK_ID off-by-one 2024-12-19 18:08:51 +01:00
x25 net/x25: fix incorrect parameter validation in the x25_getsockopt() function 2024-03-26 18:20:42 -04:00
xdp xsk: fix OOB map writes when deleting elements 2024-12-14 19:54:36 +01:00
xfrm xfrm: validate new SA's prefixlen using SA family when sel.family is unset 2024-11-01 01:56:07 +01:00
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 net: explicitly clear the sk pointer, when pf->create fails 2024-10-17 15:22:27 +02:00
sysctl_net.c sysctl: treewide: drop unused argument ctl_table_root::set_ownership(table) 2024-08-11 12:35:51 +02:00