The branch releng/13.0 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=4647d115ff849534c9d6712cc2da32509721e20e
commit 4647d115ff849534c9d6712cc2da32509721e20e Author: Mark Johnston <[email protected]> AuthorDate: 2021-06-16 13:46:56 +0000 Commit: Mark Johnston <[email protected]> CommitDate: 2021-06-29 17:09:43 +0000 ipfw: Update the pfil mbuf pointer in ipfw_check_frame() ipfw_chk() might call m_pullup() and thus can change the mbuf chain head. In this case, the new chain head has to be returned to the pfil hook caller, otherwise the pfil hook caller is left with a dangling pointer. Note that this affects only the link-layer hooks installed when the net.link.ether.ipfw sysctl is set to 1. Approved by: so Security: EN-21:21.ipfw PR: 256439, 254015, 255069, 255104 Fixes: f355cb3e6 Reviewed by: ae Sponsored by: The FreeBSD Foundation (cherry picked from commit bc6a2267fffeafd3946637607a74cfd639398f9d) (cherry picked from commit ed1acef3fe3053b418ce3e41036ccf24957253a4) --- sys/netpfil/ipfw/ip_fw_pfil.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sys/netpfil/ipfw/ip_fw_pfil.c b/sys/netpfil/ipfw/ip_fw_pfil.c index e21831c80ec6..01a44df47180 100644 --- a/sys/netpfil/ipfw/ip_fw_pfil.c +++ b/sys/netpfil/ipfw/ip_fw_pfil.c @@ -371,6 +371,8 @@ again: } ipfw = ipfw_chk(&args); + if (!mem) + *p.m = args.m; ret = PFIL_PASS; switch (ipfw) { _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/dev-commits-src-all To unsubscribe, send any mail to "[email protected]"
