syzbot


kernel BUG at fs/f2fs/inode.c:LINE!

Status: fixed on 2018/07/09 18:05
Subsystems: f2fs
[Documentation on labels]
Reported-by: syzbot+41a1b341571f0952badb@syzkaller.appspotmail.com
Fix commit: 5d64600d4f33 f2fs: avoid bug_on on corrupted inode
First crash: 2428d, last: 2428d
Discussions (4)
Title Replies (including bot) Last reply
[PATCH 4.17 00/67] 4.17.7-stable review 74 (74) 2018/07/17 09:41
[PATCH 1/5] f2fs: give message and set need_fsck given broken node id 16 (16) 2018/04/27 01:52
[PATCH] f2fs: avoid bug_on on corrupted inode 1 (1) 2018/04/24 19:47
kernel BUG at fs/f2fs/inode.c:LINE! 0 (1) 2018/04/21 07:02
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 kernel BUG at fs/f2fs/inode.c:LINE! f2fs tmpfs C error 3 720d 1522d 0/1 upstream: reported C repro on 2020/10/13 04:23
linux-4.14 kernel BUG at fs/f2fs/inode.c:LINE! C error 1 1020d 1535d 0/1 upstream: reported C repro on 2020/09/30 06:02

Sample crash report:
F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0)
F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock
F2FS-fs (loop0): invalid crc value
------------[ cut here ]------------
kernel BUG at fs/f2fs/inode.c:242!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 4543 Comm: syzkaller153755 Not tainted 4.17.0-rc1+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_read_inode fs/f2fs/inode.c:242 [inline]
RIP: 0010:f2fs_iget+0x3440/0x3d10 fs/f2fs/inode.c:317
RSP: 0018:ffff8801d90370e8 EFLAGS: 00010293
RAX: ffff8801d906c400 RBX: ffff8801b6ec10c0 RCX: ffffffff82eaccd4
RDX: 0000000000000000 RSI: ffffffff82eaee50 RDI: 0000000000000007
RBP: ffff8801d9037410 R08: ffff8801d906c400 R09: ffffed003b2fbab6
R10: ffffed003b2fbab6 R11: ffff8801d97dd5b7 R12: ffff8801ad3c8000
R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000001393880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fafd7c0c000 CR3: 00000001d9b5a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 f2fs_fill_super+0x4377/0x7bf0 fs/f2fs/super.c:2842
 mount_bdev+0x30c/0x3e0 fs/super.c:1165
 f2fs_mount+0x34/0x40 fs/f2fs/super.c:3020
 mount_fs+0xae/0x328 fs/super.c:1268
 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:1027 [inline]
 do_new_mount fs/namespace.c:2517 [inline]
 do_mount+0x564/0x3070 fs/namespace.c:2847
 ksys_mount+0x12d/0x140 fs/namespace.c:3063
 __do_sys_mount fs/namespace.c:3077 [inline]
 __se_sys_mount fs/namespace.c:3074 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3074
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x443cfa
RSP: 002b:00007ffca5ac3f88 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000b70 RCX: 0000000000443cfa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffca5ac3f90
RBP: 0000000000000003 R08: 0000000020016a00 R09: 000000000000000a
R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000004
R13: 0000000000402bf0 R14: 0000000000000000 R15: 0000000000000000
Code: 8e fe 48 c7 c2 e0 08 f2 87 be 1c 01 00 00 48 c7 c7 40 09 f2 87 c6 05 88 e7 8b 06 01 e8 3b 4a 72 fe e9 51 ef ff ff e8 d0 41 8e fe <0f> 0b e8 c9 41 8e fe e8 64 b7 78 fe 31 ff 89 c3 89 c6 e8 c9 42 
RIP: do_read_inode fs/f2fs/inode.c:242 [inline] RSP: ffff8801d90370e8
RIP: f2fs_iget+0x3440/0x3d10 fs/f2fs/inode.c:317 RSP: ffff8801d90370e8
---[ end trace 8004fd56969de769 ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/04/20 21:03 upstream 43f70c960180 cc402841 .config console log report syz C ci-upstream-kasan-gce-root
* Struck through repros no longer work on HEAD.