syzbot


general protection fault in diUpdatePMap

Status: upstream: reported C repro on 2022/09/29 20:40
Subsystems: jfs
[Documentation on labels]
Reported-by: syzbot+f7b4e42c28602e81aab3@syzkaller.appspotmail.com
First crash: 520d, last: 83d
Cause bisection: failed (error log, bisect log)
  
Fix bisection the fix commit could be any of (bisect log):
  3800a713b607 Merge tag 'mm-hotfixes-stable-2022-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
  882ad2a2a8ff Merge tag 'random-6.1-rc3-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random
  
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] general protection fault in diUpdatePMap 0 (1) 2022/09/29 20:40
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 general protection fault in diUpdatePMap C error 1 519d 519d 0/1 upstream: reported C repro on 2022/09/29 12:21
linux-4.14 general protection fault in diUpdatePMap C 1 375d 518d 0/1 upstream: reported C repro on 2022/09/30 10:17
Last patch testing requests (10)
Created Duration User Patch Repo Result
2024/02/17 02:19 17m retest repro upstream OK log
2024/01/17 05:30 20m retest repro upstream OK log
2023/12/09 01:52 19m retest repro upstream report log
2023/11/22 05:28 26m retest repro linux-next OK log
2023/11/08 04:56 17m retest repro upstream report log
2023/09/30 01:17 10m retest repro upstream report log
2023/08/30 02:59 49m retest repro upstream report log
2023/08/30 02:59 28m retest repro linux-next report log
2023/07/21 23:35 24m retest repro upstream report log
2023/05/12 22:57 24m retest repro upstream report log

Sample crash report:
general protection fault, probably for non-canonical address 0xfbd59c0000000021: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0xdead000000000108-0xdead00000000010f]
CPU: 1 PID: 121 Comm: jfsCommit Not tainted 6.0.0-rc7-syzkaller-00029-g3800a713b607 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:__list_add_valid+0x39/0x100 lib/list_debug.c:27
Code: 00 00 00 49 89 d6 48 85 d2 0f 84 9b 00 00 00 49 89 f4 49 89 ff 49 bd 00 00 00 00 00 fc ff df 49 8d 5e 08 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 f8 40 a5 fd 48 8b 13 4c 39 e2 75
RSP: 0018:ffffc9000225fc10 EFLAGS: 00010806
RAX: 1bd5a00000000021 RBX: dead000000000108 RCX: dffffc0000000000
RDX: dead000000000100 RSI: ffffc90002271120 RDI: ffff88801d761da0
RBP: ffff88801d761d90 R08: ffffffff82fc6834 R09: fffff5200044bf64
R10: fffff5200044bf65 R11: 1ffff9200044bf64 R12: ffffc90002271120
R13: dffffc0000000000 R14: dead000000000100 R15: ffff88801d761da0
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f86dc15d290 CR3: 0000000025a6f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_add include/linux/list.h:69 [inline]
 list_add include/linux/list.h:88 [inline]
 diUpdatePMap+0x5d6/0xda0 fs/jfs/jfs_imap.c:2821
 txUpdateMap+0x7c4/0xaa0 fs/jfs/jfs_txnmgr.c:2351
 txLazyCommit fs/jfs/jfs_txnmgr.c:2659 [inline]
 jfs_lazycommit+0x433/0xba0 fs/jfs/jfs_txnmgr.c:2727
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid+0x39/0x100 lib/list_debug.c:27
Code: 00 00 00 49 89 d6 48 85 d2 0f 84 9b 00 00 00 49 89 f4 49 89 ff 49 bd 00 00 00 00 00 fc ff df 49 8d 5e 08 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 f8 40 a5 fd 48 8b 13 4c 39 e2 75
RSP: 0018:ffffc9000225fc10 EFLAGS: 00010806
RAX: 1bd5a00000000021 RBX: dead000000000108 RCX: dffffc0000000000
RDX: dead000000000100 RSI: ffffc90002271120 RDI: ffff88801d761da0
RBP: ffff88801d761d90 R08: ffffffff82fc6834 R09: fffff5200044bf64
R10: fffff5200044bf65 R11: 1ffff9200044bf64 R12: ffffc90002271120
R13: dffffc0000000000 R14: dead000000000100 R15: ffff88801d761da0
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f86dc15d290 CR3: 0000000025a6f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	00 00                	add    %al,(%rax)
   2:	49 89 d6             	mov    %rdx,%r14
   5:	48 85 d2             	test   %rdx,%rdx
   8:	0f 84 9b 00 00 00    	je     0xa9
   e:	49 89 f4             	mov    %rsi,%r12
  11:	49 89 ff             	mov    %rdi,%r15
  14:	49 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%r13
  1b:	fc ff df
  1e:	49 8d 5e 08          	lea    0x8(%r14),%rbx
  22:	48 89 d8             	mov    %rbx,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 df             	mov    %rbx,%rdi
  33:	e8 f8 40 a5 fd       	callq  0xfda54130
  38:	48 8b 13             	mov    (%rbx),%rdx
  3b:	4c 39 e2             	cmp    %r12,%rdx
  3e:	75                   	.byte 0x75

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/09/27 21:06 upstream 3800a713b607 10323ddf .config strace log report syz C ci2-upstream-fs general protection fault in diUpdatePMap
2022/09/30 05:02 upstream c3e0e1e23c70 45fd7169 .config strace log report syz C [disk image] [vmlinux] ci2-upstream-fs BUG: corrupted list in diUpdatePMap
2022/09/29 21:51 upstream c3e0e1e23c70 1d385642 .config strace log report syz C [disk image] [vmlinux] ci-upstream-kasan-gce-root BUG: corrupted list in diUpdatePMap
2022/10/30 08:48 linux-next 4d48f589d294 2a71366b .config strace log report syz C [disk image] [vmlinux] [mounted in repro] ci-upstream-linux-next-kasan-gce-root BUG: corrupted list in diUpdatePMap
* Struck through repros no longer work on HEAD.