syzbot


general protection fault in metapage_write_folio

Status: upstream: reported C repro on 2024/10/08 18:13
Subsystems: jfs
[Documentation on labels]
Reported-by: syzbot+d7ffeb5538fe5c793f74@syzkaller.appspotmail.com
First crash: 291d, last: 4d19h
Cause bisection: introduced by (bisect log) :
commit 35474d52c6056976e675e9130d755cdb749ded5a
Author: Matthew Wilcox (Oracle) <willy@infradead.org>
Date: Wed Apr 17 17:56:46 2024 +0000

  jfs: Convert metapage_writepage to metapage_write_folio

Crash: BUG: unable to handle kernel NULL pointer dereference in metapage_write_folio (log)
Repro: syz .config
  
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [jfs?] general protection fault in metapage_write_folio 0 (1) 2024/10/08 18:13
Last patch testing requests (10)
Created Duration User Patch Repo Result
2025/06/11 03:20 18m retest repro upstream report log
2025/06/11 03:20 25m retest repro upstream report log
2025/06/11 03:20 16m retest repro upstream report log
2025/05/12 22:09 14m retest repro upstream report log
2025/03/27 03:06 21m retest repro upstream report log
2025/03/27 03:06 16m retest repro upstream report log
2025/03/13 04:19 17m retest repro linux-next error
2025/03/13 04:19 14m retest repro linux-next error
2025/03/13 04:19 10m retest repro linux-next error
2025/02/27 02:24 13m retest repro upstream report log

Sample crash report:
ERROR: (device loop0): diWrite: ixpxd invalid
ERROR: (device loop0): txCommit: 
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 6034 Comm: syz-executor188 Not tainted 6.16.0-rc3-syzkaller-00057-g92ca6c498a5e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:metapage_write_folio+0xa8/0xca0 fs/jfs/jfs_metapage.c:428
Code: e8 8d 7f 82 fe 4d 8d 74 24 18 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 82 d7 e3 fe 4d 8b 36 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 69 d7 e3 fe 49 8b 1e 4d 8d 74 24
RSP: 0018:ffffc900046cf240 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffffd400014df56 RCX: ffff88801e7b5a00
RDX: 0000000000000000 RSI: ffffc900046cf3a0 RDI: ffffea0000a6fa80
RBP: ffffc900046cf350 R08: ffffea0000a6fab7 R09: 1ffffd400014df56
R10: dffffc0000000000 R11: fffff9400014df57 R12: ffffea0000a6fa80
R13: 0000000000000083 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f30bb7646c0(0000) GS:ffff888125c83000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f30bb743d58 CR3: 0000000022bd6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 metapage_write_one+0x244/0x440 fs/jfs/jfs_metapage.c:816
 force_metapage+0x1a7/0x360 fs/jfs/jfs_metapage.c:838
 txForce fs/jfs/jfs_txnmgr.c:2215 [inline]
 txCommit+0x4c05/0x5430 fs/jfs/jfs_txnmgr.c:1315
 duplicateIXtree+0x292/0x490 fs/jfs/jfs_imap.c:3019
 diNewIAG fs/jfs/jfs_imap.c:2597 [inline]
 diAllocExt fs/jfs/jfs_imap.c:1905 [inline]
 diAllocAG+0x17a7/0x1df0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1d5/0x1680 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x8f0 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x193/0xa70 fs/jfs/namei.c:225
 vfs_mkdir+0x306/0x510 fs/namei.c:4375
 do_mkdirat+0x247/0x590 fs/namei.c:4408
 __do_sys_mkdirat fs/namei.c:4425 [inline]
 __se_sys_mkdirat fs/namei.c:4423 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4423
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f30bb7afbd9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f30bb764218 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f30bb83d6a8 RCX: 00007f30bb7afbd9
RDX: 0000000000000000 RSI: 0000200000000840 RDI: 00000000ffffff9c
RBP: 00007f30bb83d6a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000073 R11: 0000000000000246 R12: 0000200000000000
R13: 00002000000000c0 R14: 0000200000000f40 R15: 0000200000000840
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:metapage_write_folio+0xa8/0xca0 fs/jfs/jfs_metapage.c:428
Code: e8 8d 7f 82 fe 4d 8d 74 24 18 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 82 d7 e3 fe 4d 8b 36 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 69 d7 e3 fe 49 8b 1e 4d 8d 74 24
RSP: 0018:ffffc900046cf240 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffffd400014df56 RCX: ffff88801e7b5a00
RDX: 0000000000000000 RSI: ffffc900046cf3a0 RDI: ffffea0000a6fa80
RBP: ffffc900046cf350 R08: ffffea0000a6fab7 R09: 1ffffd400014df56
R10: dffffc0000000000 R11: fffff9400014df57 R12: ffffea0000a6fa80
R13: 0000000000000083 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f30bb7646c0(0000) GS:ffff888125c83000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f30bb743d58 CR3: 0000000022bd6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e8 8d 7f 82 fe       	call   0xfe827f92
   5:	4d 8d 74 24 18       	lea    0x18(%r12),%r14
   a:	4c 89 f0             	mov    %r14,%rax
   d:	48 c1 e8 03          	shr    $0x3,%rax
  11:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1)
  16:	74 08                	je     0x20
  18:	4c 89 f7             	mov    %r14,%rdi
  1b:	e8 82 d7 e3 fe       	call   0xfee3d7a2
  20:	4d 8b 36             	mov    (%r14),%r14
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 69 d7 e3 fe       	call   0xfee3d7a2
  39:	49 8b 1e             	mov    (%r14),%rbx
  3c:	4d                   	rex.WRB
  3d:	8d                   	.byte 0x8d
  3e:	74 24                	je     0x64

Crashes (138):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/25 22:19 upstream 92ca6c498a5e 26d77996 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs general protection fault in metapage_write_folio
2025/06/25 21:45 upstream 92ca6c498a5e 26d77996 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs general protection fault in metapage_write_folio
2025/02/03 03:53 upstream 69b8923f5003 568559e4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs general protection fault in metapage_write_folio
2024/10/06 06:10 linux-next c02d24a5af66 d7906eff .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] [mounted in repro #3] ci-upstream-linux-next-kasan-gce-root general protection fault in metapage_write_folio
2025/05/15 08:45 upstream c94d59a126cb d6b2ee52 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs general protection fault in metapage_write_folio
2024/10/23 13:18 upstream c2ee9f594da8 15fa2979 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-upstream-fs general protection fault in metapage_write_folio
2024/10/05 19:42 upstream 27cc6fdf7201 d7906eff .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-upstream-fs general protection fault in metapage_write_folio
2024/10/06 04:46 linux-next c02d24a5af66 d7906eff .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci-upstream-linux-next-kasan-gce-root general protection fault in metapage_write_folio
2024/10/06 03:06 linux-next c02d24a5af66 d7906eff .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] [mounted in repro #3] ci-upstream-linux-next-kasan-gce-root general protection fault in metapage_write_folio
2025/07/18 00:16 upstream e2291551827f 0d1223f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/07/14 08:46 upstream 347e9f5043c8 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/07/14 01:46 upstream 5d5d62298b8b 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/07/08 23:34 upstream d006330be3f7 4d9fdfa4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/07/07 06:04 upstream d7b8f8e20813 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/07/06 11:51 upstream 1f988d0788f5 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in metapage_write_folio
2025/07/05 22:46 upstream 05df91921da6 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in metapage_write_folio
2025/07/05 08:27 upstream a79a588fc176 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in metapage_write_folio
2025/07/04 18:48 upstream 4c06e63b9203 d869b261 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in metapage_write_folio
2025/07/04 00:52 upstream 17bbde2e1716 76ad128c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in metapage_write_folio
2025/07/03 19:21 upstream 17bbde2e1716 115ceea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in metapage_write_folio
2025/07/03 12:23 upstream b4911fb0b060 115ceea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in metapage_write_folio
2025/07/02 13:49 upstream 66701750d556 0cd59a8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in metapage_write_folio
2025/07/01 18:31 upstream 66701750d556 ffe4b334 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in metapage_write_folio
2025/06/30 21:34 upstream d0b3b7b22dfa 6e83b42d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in metapage_write_folio
2025/06/30 09:59 upstream d0b3b7b22dfa fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/06/30 07:52 upstream d0b3b7b22dfa fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/06/29 18:14 upstream afa9a6f4f574 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/06/29 15:26 upstream dfba48a70cb6 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/06/28 23:49 upstream dfba48a70cb6 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/06/28 17:08 upstream aaf724ed6926 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/06/28 06:36 upstream 35e261cd95dd fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in metapage_write_folio
2025/06/27 13:22 upstream 67a993863163 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in metapage_write_folio
2025/06/27 10:01 upstream 67a993863163 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/06/26 23:23 upstream e34a79b96ab9 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in metapage_write_folio
2025/06/26 16:13 upstream ee88bddf7f2f 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/06/26 09:06 upstream ee88bddf7f2f 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/06/26 08:16 upstream 92ca6c498a5e 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/06/26 00:29 upstream 92ca6c498a5e 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/06/25 19:26 upstream 92ca6c498a5e 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/06/25 12:53 upstream 7595b66ae9de 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/06/24 23:09 upstream 78f4e737a53e 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/06/22 16:53 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/06/21 21:41 upstream 3f75bfff44be d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/06/19 14:33 upstream fb4d33ab452e ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/05/28 00:30 upstream 015a99fa7665 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/05/27 11:17 upstream 914873bc7df9 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/05/25 11:02 upstream d0c22de9995b ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/05/25 03:20 upstream b1427432d3b6 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/05/23 19:23 upstream eccf6f2f6ab9 f8cc0c83 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/05/22 20:22 upstream 5cdb2c77c4c3 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/05/21 23:52 upstream 4a95bc121ccd 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/05/19 21:16 upstream a5806cd506af 8f9cf946 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/05/16 22:03 upstream 3c21441eeffc f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/05/16 19:49 upstream 3c21441eeffc cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/05/16 08:29 upstream fee3e843b309 cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/05/16 05:55 upstream fee3e843b309 cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/05/15 21:01 upstream 546bce579204 d6b2ee52 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in metapage_write_folio
2025/05/15 16:09 upstream 088d13246a46 cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/05/15 06:39 upstream c94d59a126cb d6b2ee52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in metapage_write_folio
2025/06/19 19:35 upstream 24770983ccfe ed3e87f7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in metapage_write_folio
2024/10/10 21:43 linux-next 0cca97bf2364 8fbfc0c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in metapage_write_folio
2025/06/26 14:22 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in metapage_write_folio
2025/06/25 20:19 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in metapage_write_folio
* Struck through repros no longer work on HEAD.