Jiexun Wang 645b1ed325 af_unix: Reject SIOCATMARK on non-stream sockets ...

commit d119775f2b upstream.

SIOCATMARK reports whether the receive queue is at the urgent mark for
MSG_OOB.

In AF_UNIX, MSG_OOB is supported only for SOCK_STREAM sockets.
SOCK_DGRAM and SOCK_SEQPACKET reject MSG_OOB in sendmsg() and recvmsg(),
so they should not support SIOCATMARK either.

Return -EOPNOTSUPP for non-stream sockets before checking the receive
queue.

Fixes: 314001f0bf ("af_unix: Add OOB support")
Cc: stable@kernel.org
Reported-by: Yuan Tan <yuantan098@gmail.com>
Reported-by: Yifan Wu <yifanwucs@gmail.com>
Reported-by: Juefei Pu <tomapufckgml@gmail.com>
Reported-by: Xin Liu <bird@lzu.edu.cn>
Suggested-by: Kuniyuki Iwashima <kuniyu@google.com>
Signed-off-by: Jiexun Wang <wangjiexun2025@gmail.com>
Signed-off-by: Ren Wei <n05ec@lzu.edu.cn>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20260506140825.2987635-1-n05ec@lzu.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2026-05-14 15:29:22 +02:00

..

af_unix.c

af_unix: Reject SIOCATMARK on non-stream sockets

2026-05-14 15:29:22 +02:00

diag.c

af_unix: read UNIX_DIAG_VFS data under unix_state_lock

2026-04-22 13:18:54 +02:00

garbage.c

af_unix: Initialise scc_index in unix_add_edge().

2025-11-24 10:35:51 +01:00

Kconfig

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Makefile

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sysctl_net_unix.c

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unix_bpf.c

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