Module Name: src
Committed By: jdolecek
Date: Fri Mar 27 16:34:58 UTC 2020
Modified Files:
src/sys/netinet: in_offload.c
Log Message:
fix in4_cksum() panic "in4_cksum: mbuf 14 too short for IP header 20"
triggered by bridge_output() when passing packet originally for
interface supporting hw csum offload to destination interface
not supporting it
problem happens because bridge_output() is called after ether_output()
M_PREPEND() the ether_header into the mbuf chain, if there is not
enough space on the first mbuf of the chain, it ends up prepending
a new short mbuf with just ether_header
triggered by running UDP (IPv4) 'netio -u' benchmark with packet size 2 KB
XXX seems in6_undefer_cksum() should have similar fix, however I was
XXX not able to trigger the problem there
To generate a diff of this commit:
cvs rdiff -u -r1.13 -r1.14 src/sys/netinet/in_offload.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
