syzbot


UBSAN: shift-out-of-bounds in qdisc_get_rtab
Status: fixed on 2021/06/15 10:42
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: e4bedf48aaa5 net_sched: reject silly cell_log in qdisc_get_rtab()
First crash: 362d, last: 318d

Cause bisection: introduced by (bisect log) [release commit]:
commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun Sep 15 21:19:32 2019 +0000

  Linux 5.3

Crash: UBSAN: undefined-behaviour in qdisc_get_rtab (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log) :
commit e4bedf48aaa5552bc1f49703abd17606e7e6e82a
Author: Eric Dumazet <edumazet@google.com>
Date: Thu Jan 14 16:06:37 2021 +0000

  net_sched: reject silly cell_log in qdisc_get_rtab()


Sample crash report:

Crashes (521):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/01/17 11:27 upstream 0da0a8a0a0e1 65a7a854 .config log report syz C
ci-upstream-net-this-kasan-gce 2021/01/14 13:40 net a95d25dd7b94 269d24e8 .config log report syz C
ci-upstream-net-kasan-gce 2021/01/14 13:36 net-next 679500e385fc 269d24e8 .config log report syz C
ci-upstream-net-kasan-gce 2021/01/02 03:25 net-next 3db1a3fa9880 79264ae3 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/12/08 04:53 linux-next 15ac8fdb7440 51a9082e .config log report syz C
ci-upstream-kasan-gce 2021/01/20 17:46 upstream 45dfb8a5659a d4f4eca5 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-kasan-gce 2021/01/20 16:33 upstream 45dfb8a5659a d4f4eca5 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-kasan-gce 2021/01/20 14:24 upstream 45dfb8a5659a d4f4eca5 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-kasan-gce 2021/01/20 12:50 upstream 45dfb8a5659a d4f4eca5 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-kasan-gce 2021/01/19 23:55 upstream 1e2a199f6ccd 63631df1 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-kasan-gce-root 2021/01/19 18:10 upstream 1e2a199f6ccd 63631df1 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-kasan-gce 2021/01/19 06:24 upstream 1e2a199f6ccd 63631df1 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-kasan-gce-selinux-root 2021/01/18 21:15 upstream 19c329f68089 63631df1 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-kasan-gce 2021/01/18 17:29 upstream 19c329f68089 63631df1 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-kasan-gce-selinux-root 2021/01/18 07:10 upstream a1339d6355ac fd103621 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-kasan-gce-root 2021/01/18 03:32 upstream a1339d6355ac fd103621 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-kasan-gce-root 2021/01/17 15:27 upstream 0da0a8a0a0e1 813be542 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-kasan-gce-386 2021/01/18 05:55 upstream a1339d6355ac fd103621 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-net-kasan-gce 2021/01/20 22:29 net-next 7b8fc0103bb5 d4f4eca5 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-net-kasan-gce 2021/01/20 16:27 net-next 7b8fc0103bb5 d4f4eca5 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-net-kasan-gce 2021/01/19 15:57 net-next 99d518970c5a 63631df1 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-net-kasan-gce 2021/01/18 21:33 net-next 220723dc3bcf 63631df1 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-net-kasan-gce 2021/01/18 19:47 net-next 213b97b12580 63631df1 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-net-kasan-gce 2021/01/18 14:59 net-next 213b97b12580 63631df1 .config log report info UBSAN: shift-out-of-bounds in qdisc_get_rtab
ci-upstream-kasan-gce 2021/01/17 14:16 upstream 0da0a8a0a0e1 813be542 .config log report info
ci-upstream-kasan-gce 2021/01/17 10:48 upstream 0da0a8a0a0e1 65a7a854 .config log report info
ci-upstream-kasan-gce-root 2021/01/16 14:51 upstream 1d94330a437a 65a7a854 .config log report info
ci-upstream-kasan-gce-root 2021/01/16 14:37 upstream 1d94330a437a 65a7a854 .config log report info
ci-upstream-kasan-gce-root 2021/01/16 13:35 upstream 1d94330a437a 65a7a854 .config log report info
ci-upstream-kasan-gce-selinux-root 2021/01/16 05:52 upstream 5ee88057889b 65a7a854 .config log report info
ci-upstream-kasan-gce-selinux-root 2021/01/15 05:32 upstream 146620506274 65a7a854 .config log report info
ci-upstream-kasan-gce 2021/01/15 04:23 upstream 146620506274 65a7a854 .config log report info
ci-upstream-kasan-gce-root 2021/01/13 20:32 upstream e609571b5ffa a945f0a3 .config log report info
ci-upstream-kasan-gce 2021/01/13 19:29 upstream e609571b5ffa a945f0a3 .config log report info
ci-upstream-kasan-gce 2021/01/13 14:00 upstream e609571b5ffa a945f0a3 .config log report info
ci-qemu-upstream 2021/01/09 22:09 upstream 2ff90100ace8 2c1f2513 .config log report info
ci-upstream-kasan-gce-386 2021/01/16 17:18 upstream 1d94330a437a 65a7a854 .config log report info
ci-upstream-kasan-gce-386 2021/01/16 16:10 upstream 1d94330a437a 65a7a854 .config log report info
ci-upstream-kasan-gce-386 2021/01/15 20:30 upstream 5ee88057889b 65a7a854 .config log report info
ci-upstream-kasan-gce-386 2021/01/15 06:19 upstream 146620506274 65a7a854 .config log report info
ci-upstream-kasan-gce-386 2021/01/13 23:16 upstream e609571b5ffa a945f0a3 .config log report info
ci-qemu-upstream-386 2021/01/10 03:14 upstream 2ff90100ace8 2c1f2513 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/16 05:43 net b7ba6cfabc42 65a7a854 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/14 19:02 net 5b55299eed78 65a7a854 .config log report info
ci-upstream-net-kasan-gce 2021/01/17 12:43 net-next 213b97b12580 813be542 .config log report info
ci-upstream-net-kasan-gce 2021/01/16 23:42 net-next 9ab7e76aefc9 65a7a854 .config log report info
ci-upstream-net-kasan-gce 2021/01/15 21:54 net-next 1d9f03c0a15f 65a7a854 .config log report info
ci-upstream-net-kasan-gce 2021/01/15 16:14 net-next 1d9f03c0a15f 65a7a854 .config log report info
ci-upstream-net-kasan-gce 2021/01/15 11:17 net-next 1d9f03c0a15f 65a7a854 .config log report info
ci-upstream-net-kasan-gce 2021/01/14 18:50 net-next 0ae5b43d6dde 65a7a854 .config log report info
ci-upstream-net-kasan-gce 2021/01/14 11:41 net-next 679500e385fc 269d24e8 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/15 01:38 linux-next 9152a993930d 65a7a854 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/15 00:07 linux-next 9152a993930d 65a7a854 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/14 22:46 linux-next 9152a993930d 65a7a854 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/14 12:43 linux-next 9152a993930d 269d24e8 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/13 16:40 linux-next aa515cdce7a1 a945f0a3 .config log report info
ci-upstream-linux-next-kasan-gce-root 2020/12/07 13:12 linux-next 15ac8fdb7440 1190297f .config log report info