syzbot


kernel BUG in f2fs_vm_page_mkwrite

Status: upstream: reported C repro on 2024/06/06 22:22
Subsystems: f2fs
[Documentation on labels]
Reported-by: syzbot+f195123a45ad487ca66c@syzkaller.appspotmail.com
First crash: 23d, last: 7d06h
Cause bisection: failed (error log, bisect log)
  
Discussions (3)
Title Replies (including bot) Last reply
[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
[syzbot] [f2fs?] kernel BUG in f2fs_vm_page_mkwrite 0 (1) 2024/06/06 22:22
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 23d 23d 0/3 upstream: reported on 2024/06/02 22:20
linux-5.15 kernel BUG in f2fs_vm_page_mkwrite origin:upstream C 3 23d 23d 0/3 upstream: reported C repro on 2024/06/02 22:21
Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/06/16 23:46 16m retest repro upstream error OK

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/f2fs/file.c:105!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 PID: 5092 Comm: syz-executor296 Not tainted 6.10.0-rc1-syzkaller-00304-g83814698cf48 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
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:ffffc9000316f828 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88807aa48000 RCX: ffffffff83c58900
RDX: ffff8880123a0000 RSI: ffffffff83c596b8 RDI: 0000000000000007
RBP: ffffc9000316fb68 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff9393ffd0 R12: ffffc9000316f8a8
R13: 0000000000000001 R14: ffffea00013dfbc0 R15: ffff88807aa484a8
FS:  0000555581924380(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000280 CR3: 00000000791d4000 CR4: 00000000003506f0
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:rep_movs_alternative+0x33/0x70 arch/x86/lib/copy_user_64.S:58
Code: 40 83 f9 08 73 21 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 <48> 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb
RSP: 0018:ffffc9000316fdd8 EFLAGS: 00050212
RAX: 00000000665cff9a RBX: 0000000000000010 RCX: 0000000000000010
RDX: fffff5200062dfc8 RSI: ffffc9000316fe30 RDI: 0000000020000280
RBP: 0000000020000280 R08: 0000000000000000 R09: fffff5200062dfc7
R10: ffffc9000316fe3f R11: 0000000000000000 R12: ffffc9000316fe30
R13: 0000000020000290 R14: 0000000000000000 R15: 0000000000000000
 copy_user_generic arch/x86/include/asm/uaccess_64.h:110 [inline]
 raw_copy_to_user arch/x86/include/asm/uaccess_64.h:131 [inline]
 _copy_to_user lib/usercopy.c:46 [inline]
 _copy_to_user+0xac/0xc0 lib/usercopy.c:39
 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: 0033:0x7feea661dc19
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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:00007ffeab229a38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e4
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007feea661dc19
RDX: 00007feea661dc19 RSI: 0000000020000280 RDI: 0000000000000000
RBP: 00007feea66965f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 00007ffeab229a70
R13: 00007ffeab229c98 R14: 431bde82d7b634db R15: 00007feea666603b
 </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:ffffc9000316f828 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88807aa48000 RCX: ffffffff83c58900
RDX: ffff8880123a0000 RSI: ffffffff83c596b8 RDI: 0000000000000007
RBP: ffffc9000316fb68 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff9393ffd0 R12: ffffc9000316f8a8
R13: 0000000000000001 R14: ffffea00013dfbc0 R15: ffff88807aa484a8
FS:  0000555581924380(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000280 CR3: 00000000791d4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	40 83 f9 08          	rex cmp $0x8,%ecx
   4:	73 21                	jae    0x27
   6:	85 c9                	test   %ecx,%ecx
   8:	74 0f                	je     0x19
   a:	8a 06                	mov    (%rsi),%al
   c:	88 07                	mov    %al,(%rdi)
   e:	48 ff c7             	inc    %rdi
  11:	48 ff c6             	inc    %rsi
  14:	48 ff c9             	dec    %rcx
  17:	75 f1                	jne    0xa
  19:	c3                   	ret
  1a:	cc                   	int3
  1b:	cc                   	int3
  1c:	cc                   	int3
  1d:	cc                   	int3
  1e:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  25:	00 00
  27:	48 8b 06             	mov    (%rsi),%rax
* 2a:	48 89 07             	mov    %rax,(%rdi) <-- trapping instruction
  2d:	48 83 c6 08          	add    $0x8,%rsi
  31:	48 83 c7 08          	add    $0x8,%rdi
  35:	83 e9 08             	sub    $0x8,%ecx
  38:	74 df                	je     0x19
  3a:	83 f9 08             	cmp    $0x8,%ecx
  3d:	73 e8                	jae    0x27
  3f:	eb                   	.byte 0xeb

Crashes (12):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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 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 23:42 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.