syzbot

 sign-in | mailing list | source | docs
🐞 Open [717]
🐞 Fixed [181]
🐞 Invalid [640]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

kernel BUG at mm/slab.c:LINE!

Status: upstream: reported C repro on 2019/08/04 15:26
Reported-by: syzbot+e6da2cd96b04be255a89@syzkaller.appspotmail.com
First crash: 1971d, last: 1344d
Fix bisection the fix commit could be any of (bisect log):
  7d80e1218adf Linux 4.14.136
  56dfe6252c68 Linux 4.14.188
   
▶ ▼ Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG at mm/slab.c:LINE! (4) fs 12 2033d 2101d 12/28 fixed on 2019/06/14 18:22
upstream kernel BUG at mm/slab.c:LINE! (3) mm C done 14 2107d 2234d 11/28 fixed on 2019/03/21 17:09
upstream kernel BUG at mm/slab.c:LINE! (2) hardening mm C 701 2347d 2362d 8/28 fixed on 2018/08/07 13:43
upstream kernel BUG at mm/slab.c:LINE! C 860 2667d 2671d 3/28 fixed on 2017/10/24 06:54
▶ ▼ Last patch testing requests (2)
Created Duration User Patch Repo Result
2023/02/07 00:32 24m retest repro linux-4.14.y report log
2022/09/16 17:29 9m retest repro linux-4.14.y report log
▶ ▼ Fix bisection attempts (7)
Created Duration User Patch Repo Result
2020/07/14 18:14 38m bisect fix linux-4.14.y OK (2) job log
2020/06/14 17:50 24m bisect fix linux-4.14.y OK (0) job log log
2020/05/15 14:05 25m bisect fix linux-4.14.y OK (0) job log log
2020/03/05 12:11 23m bisect fix linux-4.14.y OK (0) job log log
2020/02/04 11:46 24m bisect fix linux-4.14.y OK (0) job log log
2020/01/05 11:22 24m bisect fix linux-4.14.y OK (0) job log log
2019/12/06 10:59 23m bisect fix linux-4.14.y OK (0) job log log

Sample crash report:
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
audit: type=1400 audit(1564929772.706:36): avc:  denied  { map } for  pid=7130 comm="syz-executor271" path="/root/syz-executor271789419" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
------------[ cut here ]------------
kernel BUG at mm/slab.c:4427!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 7130 Comm: syz-executor271 Not tainted 4.14.136 #32
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888092d00200 task.stack: ffff88809ddb0000
RIP: 0010:__check_heap_object+0x58/0x5a mm/slab.c:4427
RSP: 0018:ffff88809ddb7bc0 EFLAGS: 00010246
RAX: 0000000000000001 RBX: 00000000000003a3 RCX: 0000000000000015
RDX: 00000000003fdf7b RSI: 00000000000003a3 RDI: ffff8880813ffff3
RBP: ffff88809ddb7c00 R08: ffff8880aa802c80 R09: ffff888081000080
R10: ffff88821fff8050 R11: 0000000000000001 R12: ffff8880813ffff3
R13: ffffea0002040000 R14: 0000000000000001 R15: ffffea0002040000
FS:  0000000002077880(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556eab6bd1b0 CR3: 00000000a7fb6000 CR4: 00000000001406e0
Call Trace:
 check_object_size include/linux/thread_info.h:108 [inline]
 check_copy_size include/linux/thread_info.h:139 [inline]
 copy_to_user include/linux/uaccess.h:154 [inline]
 bpf_test_finish.isra.0+0x9a/0x150 net/bpf/test_run.c:59
 bpf_prog_test_run_skb+0x5af/0x9a0 net/bpf/test_run.c:144
 bpf_prog_test_run kernel/bpf/syscall.c:1258 [inline]
 SYSC_bpf kernel/bpf/syscall.c:1520 [inline]
 SyS_bpf+0x749/0x38f3 kernel/bpf/syscall.c:1469
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x440379
RSP: 002b:00007ffc110b0c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440379
RDX: 0000000000000028 RSI: 0000000020000140 RDI: 000000000000000a
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401c00
R13: 0000000000401c90 R14: 0000000000000000 R15: 0000000000000000
Code: e8 41 39 40 24 76 24 41 0f af 40 14 4c 01 c8 48 29 c7 49 63 40 74 48 39 f8 72 08 48 29 f8 48 39 f0 73 05 49 8b 40 58 c3 31 c0 c3 <0f> 0b 44 89 e9 48 c7 c7 70 cf 41 87 89 75 d4 4c 8d 45 cc 81 e1 
RIP: __check_heap_object+0x58/0x5a mm/slab.c:4427 RSP: ffff88809ddb7bc0
---[ end trace ca535ca8d21adb4d ]---

Crashes (23):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/08/04 14:45 linux-4.14.y 7d80e1218adf 6affd8e8 .config console log report syz C ci2-linux-4-14
2021/04/22 04:36 linux-4.14.y cf256fbcbe34 2bc8999a .config console log report info ci2-linux-4-14 kernel BUG in __check_heap_object
2020/04/15 13:52 linux-4.14.y c10b57a567e4 3f3c5574 .config console log report ci2-linux-4-14
2020/04/04 03:01 linux-4.14.y 4520f06b03ae ef26b610 .config console log report ci2-linux-4-14
2020/03/30 16:58 linux-4.14.y 01364dad1d45 c8d1cc20 .config console log report ci2-linux-4-14
2020/03/30 16:56 linux-4.14.y 01364dad1d45 c8d1cc20 .config console log report ci2-linux-4-14
2020/03/30 16:37 linux-4.14.y 01364dad1d45 c8d1cc20 .config console log report ci2-linux-4-14
2020/03/26 18:36 linux-4.14.y 01364dad1d45 6d25c5a0 .config console log report ci2-linux-4-14
2019/09/15 06:02 linux-4.14.y e2cd24b62938 32d59357 .config console log report ci2-linux-4-14
2019/09/08 13:55 linux-4.14.y 414510bc00a5 a60cb4cd .config console log report ci2-linux-4-14
2019/09/06 04:26 linux-4.14.y 01fd1694b93c c16be727 .config console log report ci2-linux-4-14
2019/09/05 07:00 linux-4.14.y 01fd1694b93c 040fda58 .config console log report ci2-linux-4-14
2019/09/04 23:24 linux-4.14.y 01fd1694b93c d994512d .config console log report ci2-linux-4-14
2019/08/26 00:58 linux-4.14.y b5260801526c d21c5d9d .config console log report ci2-linux-4-14
2019/08/19 21:30 linux-4.14.y 45f092f9e9cb ae348fb7 .config console log report ci2-linux-4-14
2019/08/19 21:29 linux-4.14.y 45f092f9e9cb ae348fb7 .config console log report ci2-linux-4-14
2019/08/19 21:24 linux-4.14.y 45f092f9e9cb ae348fb7 .config console log report ci2-linux-4-14
2019/08/18 03:25 linux-4.14.y 45f092f9e9cb 55bf8926 .config console log report ci2-linux-4-14
2019/08/14 09:57 linux-4.14.y 3ffe1e79c174 ef801a3e .config console log report ci2-linux-4-14
2019/08/14 04:42 linux-4.14.y 3ffe1e79c174 ef801a3e .config console log report ci2-linux-4-14
2019/08/12 06:21 linux-4.14.y 3ffe1e79c174 acb51638 .config console log report ci2-linux-4-14
2019/08/06 07:16 linux-4.14.y 7d80e1218adf 6affd8e8 .config console log report ci2-linux-4-14
2019/08/04 14:25 linux-4.14.y 7d80e1218adf 6affd8e8 .config console log report ci2-linux-4-14
* Struck through repros no longer work on HEAD.