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(parent: b9d83ab) | patch
net/packet: convert po->origdev to an atomic flag
authorEric Dumazet <edumazet@google.com>
Thu, 16 Mar 2023 01:10:07 +0000 (01:10 +0000)
committerDavid S. Miller <davem@davemloft.net>
Fri, 17 Mar 2023 08:52:05 +0000 (08:52 +0000)
commitee5675ecdf7a4e713ed21d98a70c2871d6ebed01
treebe50e68015ab84229d2f3cd223e352be1df2bb2ftree | snapshot
parentb9d83ab8a708f23a4001d60e9d8d0b3be3d9f607commit | diff
net/packet: convert po->origdev to an atomic flag

syzbot/KCAN reported that po->origdev can be read
while another thread is changing its value.

We can avoid this splat by converting this field
to an actual bit.

Following patches will convert remaining 1bit fields.

Fixes: 80feaacb8a64 ("[AF_PACKET]: Add option to return orig_dev to userspace.")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/packet/af_packet.c diff | blob | history
net/packet/diag.c diff | blob | history
net/packet/internal.h diff | blob | history
Domain: System / Kernel;