Re: KASAN: stack-out-of-bounds Read in rds_sendmsg

From: Santosh Shilimkar
Date: Thu Dec 21 2017 - 11:59:27 EST


On 12/21/2017 1:10 AM, syzbot wrote:
syzkaller has found reproducer for the following crash on


audit: type=1400 audit(1513847224.110:7): avc: denied { map } for pid=3157 comm="syzkaller455006" path="/root/syzkaller455006870" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
BUG: KASAN: stack-out-of-bounds in rds_rdma_bytes net/rds/send.c:1013 [inline]

Could you please post the discussed fix if you are ready with it ?
This new report is same as last one and cmesg length check should
address it.