syzbot


kernel BUG at kernel/time/timer.c:LINE!

Status: fixed on 2018/02/26 20:04
Subsystems: netfilter
[Documentation on labels]
Reported-by: syzbot+10c98dc5725c6c8fc7fb@syzkaller.appspotmail.com
Fix commit: 10414014bc08 netfilter: x_tables: fix missing timer initialization in xt_LED
First crash: 2318d, last: 2303d
Discussions (11)
Title Replies (including bot) Last reply
[PATCH 3.16 000/410] 3.16.57-rc1 review 426 (426) 2018/11/12 17:42
[PATCH 3.2 000/153] 3.2.102-rc1 review 155 (155) 2018/05/30 22:14
[PATCH 4.4 00/63] 4.4.122-stable review 79 (79) 2018/04/06 07:51
[PATCH 4.9 00/86] 4.9.88-stable review 97 (97) 2018/03/22 17:47
[PATCH 3.18 00/25] 3.18.100-stable review 30 (30) 2018/03/18 10:14
[PATCH 4.15 000/146] 4.15.10-stable review 160 (160) 2018/03/15 10:19
[PATCH 4.14 000/140] 4.14.27-stable review 150 (150) 2018/03/14 18:26
[PATCH 00/19] Netfilter fixes for net 21 (21) 2018/02/21 19:56
[PATCH net v2] netfilter: x_tables: fix missing timer initialization in xt_LED 2 (2) 2018/02/14 19:55
[PATCH net] netfilter: x_tables: fix missing timer initialization in xt_LED 2 (2) 2018/02/12 17:23
kernel BUG at kernel/time/timer.c:LINE! 0 (1) 2018/02/12 15:54
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG at kernel/time/timer.c:LINE! (3) net 1 1928d 1927d 11/27 fixed on 2019/03/28 12:00
upstream kernel BUG at kernel/time/timer.c:LINE! (4) media usb syz 1 1717d 1713d 15/27 fixed on 2019/12/13 00:31
upstream kernel BUG at kernel/time/timer.c:LINE! (2) hams C 5 1991d 1993d 11/27 fixed on 2019/01/15 20:25
linux-4.14 kernel BUG at kernel/time/timer.c:LINE! C inconclusive 12 1265d 1651d 0/1 upstream: reported C repro on 2019/12/08 18:43

Sample crash report:
------------[ cut here ]------------
kernel BUG at kernel/time/timer.c:958!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 1826 Comm: kworker/1:2 Not tainted 4.15.0+ #306
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:__mod_timer kernel/time/timer.c:958 [inline]
RIP: 0010:mod_timer+0x7d6/0x13c0 kernel/time/timer.c:1102
RSP: 0018:ffff8801d24fe9f8 EFLAGS: 00010293
RAX: ffff8801d25246c0 RBX: ffff8801aec6cb50 RCX: ffffffff816052c6
RDX: 0000000000000000 RSI: 00000000fffbd14b RDI: ffff8801aec6cb68
RBP: ffff8801d24fec98 R08: 0000000000000000 R09: 1ffff1003a49fd6c
R10: ffff8801d24feb28 R11: 0000000000000005 R12: dffffc0000000000
R13: ffff8801d24fec70 R14: 00000000fffbd14b R15: ffff8801af608f90
FS:  0000000000000000(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000206d6fd0 CR3: 0000000006a22001 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 led_tg+0x1db/0x2e0 net/netfilter/xt_LED.c:75
 ip6t_do_table+0xc2a/0x1a30 net/ipv6/netfilter/ip6_tables.c:365
 ip6table_raw_hook+0x65/0x80 net/ipv6/netfilter/ip6table_raw.c:42
 nf_hook_entry_hookfn include/linux/netfilter.h:120 [inline]
 nf_hook_slow+0xba/0x1a0 net/netfilter/core.c:483
 nf_hook.constprop.27+0x3f6/0x830 include/linux/netfilter.h:243
 NF_HOOK include/linux/netfilter.h:286 [inline]
 ndisc_send_skb+0xa51/0x1370 net/ipv6/ndisc.c:491
 ndisc_send_ns+0x38a/0x870 net/ipv6/ndisc.c:633
 addrconf_dad_work+0xb9e/0x1320 net/ipv6/addrconf.c:4008
 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
 worker_thread+0x223/0x1990 kernel/workqueue.c:2247
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
Code: 85 2a 0b 00 00 4d 8b 3c 24 4d 85 ff 75 9f 4c 8b bd 60 fd ff ff e8 bb 57 10 00 65 ff 0d 94 9a a1 7e e9 d9 fc ff ff e8 aa 57 10 00 <0f> 0b e8 a3 57 10 00 e9 14 fb ff ff e8 99 57 10 00 4c 89 bd 70 
RIP: __mod_timer kernel/time/timer.c:958 [inline] RSP: ffff8801d24fe9f8
RIP: mod_timer+0x7d6/0x13c0 kernel/time/timer.c:1102 RSP: ffff8801d24fe9f8
---[ end trace f661ab06f5dd8b3d ]---
Kernel panic - not syncing: Fatal exception in interrupt
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (18):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/02/10 01:53 upstream f9f1e414128e 2b6b214c .config console log report syz C ci-upstream-kasan-gce
2018/02/10 01:54 net-next-old 617aebe6a97e 2b6b214c .config console log report syz C ci-upstream-net-kasan-gce
2018/02/19 15:55 upstream 91ab883eb213 833f78c7 .config console log report ci-upstream-kasan-gce
2018/02/12 21:54 upstream 178e834c47b0 88bc17df .config console log report ci-upstream-kasan-gce
2018/02/12 11:55 upstream 7928b2cbe55b 88bc17df .config console log report ci-upstream-kasan-gce
2018/02/10 12:40 upstream 9a61df9e5f74 e67d44e0 .config console log report ci-upstream-kasan-gce
2018/02/10 12:39 upstream 9a61df9e5f74 e67d44e0 .config console log report ci-upstream-kasan-gce
2018/02/09 19:45 upstream f9f1e414128e 2b6b214c .config console log report ci-upstream-kasan-gce
2018/02/24 11:43 net-next-old 1b71af6053af 5c1e0207 .config console log report ci-upstream-net-kasan-gce
2018/02/24 07:54 net-next-old 1b71af6053af 5c1e0207 .config console log report ci-upstream-net-kasan-gce
2018/02/22 16:24 net-next-old 0ea5f58ebc83 02fb4232 .config console log report ci-upstream-net-kasan-gce
2018/02/22 11:22 net-next-old 0ea5f58ebc83 04cbdbd1 .config console log report ci-upstream-net-kasan-gce
2018/02/22 10:26 net-next-old 0ea5f58ebc83 04cbdbd1 .config console log report ci-upstream-net-kasan-gce
2018/02/21 20:54 net-next-old 022ddbca86ce 04cbdbd1 .config console log report ci-upstream-net-kasan-gce
2018/02/13 04:25 net-next-old 7928b2cbe55b 88bc17df .config console log report ci-upstream-net-kasan-gce
2018/02/12 01:19 net-next-old 9a61df9e5f74 4e9b726d .config console log report ci-upstream-net-kasan-gce
2018/02/10 09:16 net-next-old 617aebe6a97e 2b6b214c .config console log report ci-upstream-net-kasan-gce
2018/02/09 19:29 net-next-old 617aebe6a97e 033b610e .config console log report ci-upstream-net-kasan-gce
* Struck through repros no longer work on HEAD.