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authorXin Long <lucien.xin@gmail.com>2018-05-10 17:34:13 +0800
committerDavid S. Miller <davem@davemloft.net>2018-05-10 17:48:36 -0400
commit6910e25de2257e2c82c7a2d126e3463cd8e50810 (patch)
tree4f62bb31883657aee3d03961e715a5938df04519 /Documentation/fmc
parenta577d868b768a3baf16cdd4841ab8cfb165521d6 (diff)
sctp: remove sctp_chunk_put from fail_mark err path in sctp_ulpevent_make_rcvmsg
In Commit 1f45f78f8e51 ("sctp: allow GSO frags to access the chunk too"), it held the chunk in sctp_ulpevent_make_rcvmsg to access it safely later in recvmsg. However, it also added sctp_chunk_put in fail_mark err path, which is only triggered before holding the chunk. syzbot reported a use-after-free crash happened on this err path, where it shouldn't call sctp_chunk_put. This patch simply removes this call. Fixes: 1f45f78f8e51 ("sctp: allow GSO frags to access the chunk too") Reported-by: syzbot+141d898c5f24489db4aa@syzkaller.appspotmail.com Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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