syzbot


BUG: unable to handle kernel NULL pointer dereference in xsk_poll
Status: fixed on 2019/11/04 14:50
Reported-by: syzbot+a5765ed8cdb1cca4d249@syzkaller.appspotmail.com
Fix commit: df551058f7a3 xsk: Fix crash in poll when device does not support ndo_xsk_wakeup
First crash: 815d, last: 783d

Cause bisection: introduced by (bisect log) :
commit 77cd0d7b3f257fd0e3096b4fdcff1a7d38e99e10
Author: Magnus Karlsson <magnus.karlsson@intel.com>
Date: Wed Aug 14 07:27:17 2019 +0000

  xsk: add support for need_wakeup flag in AF_XDP rings

Crash: BUG: unable to handle kernel NULL pointer dereference in xsk_poll (log)
Repro: C syz .config

Sample crash report:

Crashes (10):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2019/10/18 02:38 upstream 283ea345934d 8c88c9c1 .config log report syz C
ci-upstream-kasan-gce-root 2019/10/13 04:19 upstream 48acba989ed5 426631dd .config log report syz C
ci-upstream-kasan-gce-smack-root 2019/10/13 02:56 upstream 48acba989ed5 426631dd .config log report syz C
ci-upstream-kasan-gce 2019/10/05 20:34 upstream b145b0eb2031 f3f7d9c8 .config log report syz C
ci-upstream-kasan-gce 2019/09/30 07:10 upstream a3c0e7b1fe1f c1ad5441 .config log report syz C
ci-upstream-kasan-gce-386 2019/10/06 05:54 upstream 4ea655343ce4 f3f7d9c8 .config log report syz C
ci-upstream-net-this-kasan-gce 2019/09/30 07:47 net 02dc96ef6c25 c1ad5441 .config log report syz C
ci-upstream-net-kasan-gce 2019/10/02 06:06 net-next 5be5515a8ea1 b7a87a83 .config log report syz C
ci-upstream-kasan-gce 2019/09/30 06:13 upstream a3c0e7b1fe1f c1ad5441 .config log report
ci-upstream-linux-next-kasan-gce-root 2019/09/15 04:53 linux-next 6d028043b55e 32d59357 .config log report