syzbot


kernel BUG in f2fs_vm_page_mkwrite

Status: fixed on 2024/08/21 09:01
Subsystems: f2fs
[Documentation on labels]
Reported-by: syzbot+f195123a45ad487ca66c@syzkaller.appspotmail.com
Fix commit: a8eb3de28e7a f2fs: fix return value of f2fs_convert_inline_inode()
First crash: 257d, last: 226d
Cause bisection: failed (error log, bisect log)
  
Fix bisection: fixed by (bisect log) :
commit a8eb3de28e7a365690c61161e7a07a4fc7c60bbf
Author: Chao Yu <chao@kernel.org>
Date: Mon Jun 3 01:07:45 2024 +0000

  f2fs: fix return value of f2fs_convert_inline_inode()

  
Discussions (3)
Title Replies (including bot) Last reply
[syzbot] [f2fs?] kernel BUG in f2fs_vm_page_mkwrite 1 (3) 2024/08/20 01:41
[PATCH] f2fs: fix convert inline inode on readonly mode 3 (3) 2024/06/12 04:50
[syzbot] Monthly f2fs report (Jun 2024) 0 (1) 2024/06/10 12:42
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 kernel BUG in f2fs_vm_page_mkwrite 2 257d 257d 0/3 auto-obsoleted due to no activity on 2024/09/10 22:21
linux-5.15 kernel BUG in f2fs_vm_page_mkwrite origin:upstream C done 3 215d 257d 3/3 fixed on 2024/08/26 14:10
Last patch testing requests (3)
Created Duration User Patch Repo Result
2024/07/03 17:46 42m retest repro upstream report log
2024/07/03 17:46 3h40m retest repro linux-next OK log
2024/06/16 23:46 16m retest repro upstream error

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/f2fs/file.c:105!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 PID: 5199 Comm: syz-executor154 Not tainted 6.10.0-rc1-syzkaller-00304-g83814698cf48 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:f2fs_vm_page_mkwrite+0x1679/0x1bb0 fs/f2fs/file.c:105
Code: e7 41 83 e7 01 4c 89 fe e8 84 39 c8 fd 4d 85 ff 0f 84 f6 f8 ff ff e8 46 3e c8 fd 49 83 ec 01 e9 eb f8 ff ff e8 38 3e c8 fd 90 <0f> 0b e8 30 3e c8 fd e8 5b 0a 3b fd e9 f0 f1 ff ff 48 89 4c 24 08
RSP: 0018:ffffc90003277838 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880329008d0 RCX: ffffffff83c58900
RDX: ffff888025b14880 RSI: ffffffff83c596b8 RDI: 0000000000000007
RBP: ffffc90003277b78 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff939349f0 R12: ffffc900032778b8
R13: 0000000000000001 R14: ffffea0000a9c1c0 R15: ffff888032900d78
FS:  0000555584d97380(0000) GS:ffff88806b100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000280 CR3: 000000002ce7e000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_page_mkwrite+0x17d/0x390 mm/memory.c:3099
 wp_page_shared mm/memory.c:3501 [inline]
 do_wp_page+0xc89/0x3380 mm/memory.c:3651
 handle_pte_fault mm/memory.c:5396 [inline]
 __handle_mm_fault+0x2311/0x53f0 mm/memory.c:5523
 handle_mm_fault+0x476/0xa00 mm/memory.c:5688
 do_user_addr_fault+0x2e5/0xe50 arch/x86/mm/fault.c:1389
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:copy_user_generic arch/x86/include/asm/uaccess_64.h:110 [inline]
RIP: 0010:raw_copy_to_user arch/x86/include/asm/uaccess_64.h:131 [inline]
RIP: 0010:_copy_to_user lib/usercopy.c:46 [inline]
RIP: 0010:_copy_to_user+0xa7/0xc0 lib/usercopy.c:39
Code: 89 ee 48 89 ef e8 89 a4 0a fd 4d 85 f6 75 b5 e8 0f aa 0a fd 89 de 4c 89 e7 e8 35 84 66 fd 0f 01 cb 48 89 d9 48 89 ef 4c 89 e6 <f3> a4 0f 1f 00 0f 01 ca 48 89 cb eb 8d 66 66 2e 0f 1f 84 00 00 00
RSP: 0018:ffffc90003277de0 EFLAGS: 00050246
RAX: 0000000000000001 RBX: 0000000000000010 RCX: 0000000000000010
RDX: fffff5200064efc8 RSI: ffffc90003277e30 RDI: 0000000020000280
RBP: 0000000020000280 R08: 0000000000000000 R09: fffff5200064efc7
R10: ffffc90003277e3f R11: 0000000000000000 R12: ffffc90003277e30
R13: 0000000020000290 R14: 0000000000000000 R15: 0000000000000000
 copy_to_user include/linux/uaccess.h:191 [inline]
 put_timespec64+0xb6/0x120 kernel/time/time.c:910
 __do_sys_clock_gettime kernel/time/posix-timers.c:1144 [inline]
 __se_sys_clock_gettime kernel/time/posix-timers.c:1132 [inline]
 __x64_sys_clock_gettime+0x1d5/0x270 kernel/time/posix-timers.c:1132
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd22d32a7b9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff7015eea8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e4
RAX: ffffffffffffffda RBX: 00007fff7015f088 RCX: 00007fd22d32a7b9
RDX: 00007fd22d32a7b9 RSI: 0000000020000280 RDI: 0000000000000000
RBP: 00007fd22d3a2610 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff7015f078 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_vm_page_mkwrite+0x1679/0x1bb0 fs/f2fs/file.c:105
Code: e7 41 83 e7 01 4c 89 fe e8 84 39 c8 fd 4d 85 ff 0f 84 f6 f8 ff ff e8 46 3e c8 fd 49 83 ec 01 e9 eb f8 ff ff e8 38 3e c8 fd 90 <0f> 0b e8 30 3e c8 fd e8 5b 0a 3b fd e9 f0 f1 ff ff 48 89 4c 24 08
RSP: 0018:ffffc90003277838 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880329008d0 RCX: ffffffff83c58900
RDX: ffff888025b14880 RSI: ffffffff83c596b8 RDI: 0000000000000007
RBP: ffffc90003277b78 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff939349f0 R12: ffffc900032778b8
R13: 0000000000000001 R14: ffffea0000a9c1c0 R15: ffff888032900d78
FS:  0000555584d97380(0000) GS:ffff88806b000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561842eb5560 CR3: 000000002ce7e000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	89 ee                	mov    %ebp,%esi
   2:	48 89 ef             	mov    %rbp,%rdi
   5:	e8 89 a4 0a fd       	call   0xfd0aa493
   a:	4d 85 f6             	test   %r14,%r14
   d:	75 b5                	jne    0xffffffc4
   f:	e8 0f aa 0a fd       	call   0xfd0aaa23
  14:	89 de                	mov    %ebx,%esi
  16:	4c 89 e7             	mov    %r12,%rdi
  19:	e8 35 84 66 fd       	call   0xfd668453
  1e:	0f 01 cb             	stac
  21:	48 89 d9             	mov    %rbx,%rcx
  24:	48 89 ef             	mov    %rbp,%rdi
  27:	4c 89 e6             	mov    %r12,%rsi
* 2a:	f3 a4                	rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction
  2c:	0f 1f 00             	nopl   (%rax)
  2f:	0f 01 ca             	clac
  32:	48 89 cb             	mov    %rcx,%rbx
  35:	eb 8d                	jmp    0xffffffc4
  37:	66                   	data16
  38:	66                   	data16
  39:	2e                   	cs
  3a:	0f                   	.byte 0xf
  3b:	1f                   	(bad)
  3c:	84 00                	test   %al,(%rax)

Crashes (12):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/02 22:33 upstream 83814698cf48 c2e07261 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-qemu-upstream kernel BUG in f2fs_vm_page_mkwrite
2024/06/02 23:26 upstream 83814698cf48 3113787f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-selinux-root kernel BUG in f2fs_vm_page_mkwrite
2024/06/02 23:42 linux-next 0e1980c40b6e 3113787f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root kernel BUG in f2fs_vm_page_mkwrite
2024/06/02 22:45 upstream a693b9c95abd 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root kernel BUG in f2fs_vm_page_mkwrite
2024/06/02 22:45 upstream a693b9c95abd 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root kernel BUG in f2fs_vm_page_mkwrite
2024/06/02 22:19 upstream 83814698cf48 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root kernel BUG in f2fs_vm_page_mkwrite
2024/06/02 22:19 upstream 83814698cf48 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root kernel BUG in f2fs_vm_page_mkwrite
2024/06/02 22:21 upstream 83814698cf48 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream kernel BUG in f2fs_vm_page_mkwrite
2024/06/02 22:21 upstream 83814698cf48 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream kernel BUG in f2fs_vm_page_mkwrite
2024/06/18 19:48 upstream 2ccbdf43d5e7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel BUG in f2fs_vm_page_mkwrite
2024/06/02 22:24 linux-next 0e1980c40b6e 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in f2fs_vm_page_mkwrite
2024/06/02 22:24 linux-next 0e1980c40b6e 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in f2fs_vm_page_mkwrite
* Struck through repros no longer work on HEAD.