https://github.com/torvalds/linux
Revision 32832a2caf82663870126c5186cf8f86c8b2a649 authored by Xin Long on 10 April 2023, 19:43:30 UTC, committed by Paolo Abeni on 13 April 2023, 08:01:59 UTC
Currently, when traversing ifwdtsn skips with _sctp_walk_ifwdtsn, it only
checks the pos against the end of the chunk. However, the data left for
the last pos may be < sizeof(struct sctp_ifwdtsn_skip), and dereference
it as struct sctp_ifwdtsn_skip may cause coverflow.

This patch fixes it by checking the pos against "the end of the chunk -
sizeof(struct sctp_ifwdtsn_skip)" in sctp_ifwdtsn_skip, similar to
sctp_fwdtsn_skip.

Fixes: 0fc2ea922c8a ("sctp: implement validate_ftsn for sctp_stream_interleave")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/r/2a71bffcd80b4f2c61fac6d344bb2f11c8fd74f7.1681155810.git.lucien.xin@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
1 parent 6417070
History
Tip revision: 32832a2caf82663870126c5186cf8f86c8b2a649 authored by Xin Long on 10 April 2023, 19:43:30 UTC
sctp: fix a potential overflow in sctp_ifwdtsn_skip
Tip revision: 32832a2
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