syzbot


general protection fault in watchdog

Status: fixed on 2019/03/06 07:43
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+7713f3aa67be76b1552c@syzkaller.appspotmail.com
Fix commit: e2c8d550a973 netfilter: ebtables: account ebt_table_info to kmemcg
First crash: 2010d, last: 2010d
Discussions (8)
Title Replies (including bot) Last reply
[PATCH 4.19 00/99] 4.19.17-stable review 109 (109) 2019/04/22 19:40
[PATCH 4.14 00/59] 4.14.95-stable review 65 (65) 2019/01/23 12:55
[PATCH 4.9 00/51] 4.9.152-stable review 56 (56) 2019/01/23 09:06
[PATCH 4.20 000/111] 4.20.4-stable review 120 (120) 2019/01/23 06:43
[PATCH 0/7] Netfilter fixes for net 9 (9) 2019/01/15 21:32
[PATCH v2] netfilter: account ebt_table_info to kmemcg 9 (9) 2019/01/10 23:57
[PATCH] netfilter: account ebt_table_info to kmemcg 14 (14) 2019/01/04 13:21
general protection fault in watchdog 7 (8) 2018/12/14 16:59

Sample crash report:
Node 0 DMA free:15908kB min:164kB low:204kB high:244kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1019 Comm: khungtaskd Not tainted 4.20.0-rc6+ #150
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_hung_uninterruptible_tasks kernel/hung_task.c:197 [inline]
RIP: 0010:watchdog+0x492/0x1060 kernel/hung_task.c:289
Code: 44 89 b5 30 fe ff ff 48 c1 e8 03 4c 01 e8 48 89 85 e8 fd ff ff e9 f8 00 00 00 e8 29 f3 ff ff 48 8d 7b 10 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 70 0a 00 00 4c 8b 73 10 bf 02 00 00 00 4c 89
RSP: 0018:ffff8881d7b37cc8 EFLAGS: 00010202
RAX: 01a5bfffffffff51 RBX: 0d2dfffffffffa7a RCX: ffffffff817f9259
RDX: 0000000000000000 RSI: ffffffff817f9147 RDI: 0d2dfffffffffa8a
xt_bpf: check failed: parse error
RBP: ffff8881d7b37f00 R08: ffff8881d7bae140 R09: ffffed103b5e5b5f
R10: ffffed103b5e5b5f R11: ffff8881daf2dafb R12: 00000000000003d6
R13: dffffc0000000000 R14: 1ffff1103af66fbb R15: 00000000003fffd7
FS:  0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f98b2d7c324 CR3: 00000001931bf000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lowmem_reserve[]: 0 2818 6321 6321
Node 0 DMA32 free:43812kB min:30052kB low:37564kB high:45076kB active_anon:6236kB inactive_anon:0kB active_file:0kB inactive_file:80kB unevictable:0kB writepending:0kB present:3129332kB managed:2888780kB mlocked:0kB kernel_stack:32kB pagetables:0kB bounce:0kB free_pcp:200kB local_pcp:200kB free_cma:0kB
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
lowmem_reserve[]: 0 0 3503 3503
Node 0 Normal free:158644kB min:37364kB low:46704kB high:56044kB active_anon:4768kB inactive_anon:768kB active_file:556kB inactive_file:1936kB unevictable:0kB writepending:0kB present:4718592kB managed:3587816kB mlocked:0kB kernel_stack:5952kB pagetables:1172kB bounce:0kB free_pcp:2416kB local_pcp:604kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0
Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB
Node 0 DMA32: 21*4kB (UM) 19*8kB (ME) 17*16kB (UM) 15*32kB (UME) 13*64kB (ME) 4*128kB (M) 3*256kB (UM) 16*512kB (UM) 12*1024kB (UME) 6*2048kB (UME) 2*4096kB (UM) = 44060kB
Node 0 Normal: 366*4kB (UME) 308*8kB (UME) 615*16kB (UME) 146*32kB (UME) 467*64kB (UME) 43*128kB (UM) 4*256kB (UM) 2*512kB (ME) 2*1024kB (ME) 0*2048kB 0*4096kB = 57928kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
591 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
1965979 pages RAM
0 pages HighMem/MovableOnly
342853 pages reserved
0 pages cma reserved
Unreclaimable slab info:
Name                      Used          Total
TIPC                       1KB          7KB
SCTPv6                     2KB          6KB
DCCPv6                     2KB          7KB
DCCP                       2KB          6KB
fib6_nodes                 0KB          4KB
ip6_dst_cache              4KB          7KB
RAWv6                      9KB         19KB
UDPv6                     14KB         14KB
TCPv6                     23KB         29KB
nf_conntrack               0KB          3KB
sd_ext_cdb                 0KB          3KB
scsi_sense_cache        1056KB       1060KB
virtio_scsi_cmd           16KB         16KB
---[ end trace 92ff4e73865c48e6 ]---
sgpool-128                 8KB          8KB
RIP: 0010:check_hung_uninterruptible_tasks kernel/hung_task.c:197 [inline]
RIP: 0010:watchdog+0x492/0x1060 kernel/hung_task.c:289
sgpool-64                  4KB          6KB
sgpool-32                  2KB          7KB
Code: 44 89 b5 30 fe ff ff 48 c1 e8 03 4c 01 e8 48 89 85 e8 fd ff ff e9 f8 00 00 00 e8 29 f3 ff ff 48 8d 7b 10 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 70 0a 00 00 4c 8b 73 10 bf 02 00 00 00 4c 89
sgpool-16                  1KB          3KB
RSP: 0018:ffff8881d7b37cc8 EFLAGS: 00010202
RAX: 01a5bfffffffff51 RBX: 0d2dfffffffffa7a RCX: ffffffff817f9259
RDX: 0000000000000000 RSI: ffffffff817f9147 RDI: 0d2dfffffffffa8a
RBP: ffff8881d7b37f00 R08: ffff8881d7bae140 R09: ffffed103b5e5b5f
sgpool-8                   0KB          3KB
mqueue_inode_cache          1KB          7KB
R10: ffffed103b5e5b5f R11: ffff8881daf2dafb R12: 00000000000003d6
R13: dffffc0000000000 R14: 1ffff1103af66fbb R15: 00000000003fffd7
bio_post_read_ctx         14KB         15KB
FS:  0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
bio-2                     14KB         15KB
jfs_mp                     7KB          7KB
nfs_commit_data            3KB          7KB
CR2: 00000000004376a0 CR3: 000000016845e000 CR4: 00000000001406f0
nfs_write_data            32KB         32KB
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
ext4_system_zone           0KB          3KB

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/12/13 15:29 upstream f5d582777bcb f3d9d594 .config console log report syz C ci-upstream-kasan-gce-smack-root
* Struck through repros no longer work on HEAD.