Change #264027

Comments

avformat/sctp: add size check in sctp_read() matching sctp_write()
Commit 5b98cea4 added a size < 2 guard to sctp_write() to prevent
out-of-bounds access when max_streams is enabled, but the identical
pattern in sctp_read() was not addressed.

When max_streams is non-zero, sctp_read() passes (buf + 2, size - 2)
to ff_sctp_recvmsg(). If size < 2, size - 2 wraps to a large value
on the implicit cast to size_t in the callee.

Add the same guard.

Signed-off-by: bird <6666242+bird@users.noreply.github.com>

Changed files

• libavformat/sctp.c