syzbot
kernel BUG in ext4_writepages
Status:
fixed on 2022/11/16 18:44
Reported-by: syzbot+bd13648a53ed6933ca49@syzkaller.appspotmail.com
Fix commit:
4bb26f2885ac
ext4: avoid crash when inline data creation follows DIO write
First crash: 1546d, last: 1385d
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Similar bugs (14)
| Kernel |
Title |
Rank
🛈
|
Repro |
Cause bisect |
Fix bisect |
Count |
Last |
Reported |
Patched |
Status |
| linux-4.19 |
kernel BUG at fs/ext4/inode.c:LINE!
ext4
|
-1 |
syz, C |
|
error |
145 |
1245d |
2119d
|
0/1 |
upstream: reported C repro on 2020/10/14 01:19
|
| android-54 |
kernel BUG at fs/ext4/inode.c:LINE!
ext4
|
-1 |
syz, C |
|
|
272 |
434d |
2393d
|
0/2 |
upstream: reported C repro on 2020/01/14 12:13
|
| linux-5.15 |
kernel BUG in ext4_writepages
origin:upstream
|
-1 |
syz, C |
|
error |
284 |
4h52m |
1239d
|
0/3 |
upstream: reported C repro on 2023/03/13 06:22
|
| linux-4.14 |
kernel BUG at fs/ext4/inode.c:LINE!
ext4
|
-1 |
syz, C |
|
|
11 |
1253d |
2047d
|
0/1 |
upstream: reported C repro on 2020/12/25 03:51
|
| linux-6.1 |
kernel BUG in ext4_writepages
origin:upstream
|
-1 |
syz, C |
|
error |
293 |
12h39m |
1240d
|
0/3 |
upstream: reported C repro on 2023/03/12 17:26
|
| android-5-15 |
kernel BUG in ext4_writepages
ext4
origin:upstream
|
-1 |
syz, C |
error |
|
703 |
18h03m |
1385d
|
0/2 |
upstream: reported C repro on 2022/10/18 14:12
|
| android-6-1 |
kernel BUG in ext4_writepages
origin:upstream
|
-1 |
syz, C |
error |
|
776 |
1d04h |
1155d
|
0/2 |
upstream: reported C repro on 2023/06/05 07:33
|
| upstream |
kernel BUG in mpage_prepare_extent_to_map
ext4
|
-1 |
syz, C |
done |
error |
145 |
1329d |
1890d
|
0/29 |
auto-obsoleted due to no activity on 2024/03/07 20:46
|
| android-5-10 |
kernel BUG in ext4_writepages (2)
ext4
|
-1 |
syz, C |
error |
inconclusive |
551 |
4d05h |
1345d
|
0/2 |
upstream: reported C repro on 2022/11/27 00:51
|
| upstream |
kernel BUG at fs/ext4/inode.c:LINE!
ext4
|
-1 |
syz, C |
done |
|
9 |
2042d |
2167d
|
19/29 |
fixed on 2021/03/10 01:48
|
| android-49 |
kernel BUG at fs/ext4/inode.c:LINE!
|
-1 |
syz, C |
|
|
280 |
2742d |
2671d
|
0/3 |
public: reported C repro on 2019/04/11 08:44
|
| android-414 |
kernel BUG at fs/ext4/inode.c:LINE!
|
-1 |
|
|
|
1 |
2817d |
2668d
|
0/1 |
auto-closed as invalid on 2019/05/15 13:37
|
| android-5-10 |
kernel BUG in mpage_prepare_extent_to_map
|
-1 |
syz, C |
error |
|
254 |
1566d |
1735d
|
2/2 |
fixed on 2022/04/21 04:24
|
| android-44 |
kernel BUG at fs/ext4/inode.c:LINE!
|
-1 |
syz, C |
|
|
110 |
2758d |
2671d
|
0/2 |
public: reported C repro on 2019/04/11 08:44
|
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Last patch testing requests (8)
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Fix bisection attempts (2)
Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2760!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 371 Comm: syz-executor189 Not tainted 5.10.147-syzkaller-01341-gbc7618b4936f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:ext4_writepages+0x36f6/0x3710 fs/ext4/inode.c:2759
Code: c6 31 ff e8 fc fe 8f ff 84 db 75 2c e8 e3 fb 8f ff 48 bb 00 00 00 00 00 fc ff df 4c 8b 64 24 40 e9 28 f7 ff ff e8 ca fb 8f ff <0f> 0b e8 c3 fb 8f ff e8 fd 92 23 ff eb a0 e8 b7 fb 8f ff e8 f1 92
RSP: 0018:ffffc9000029f300 EFLAGS: 00010293
RAX: ffffffff81dcef46 RBX: 0000008000000000 RCX: ffff8881067a0000
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc9000029f6f0 R08: ffffffff81dcbf2a R09: ffffed1021ce5e12
R10: ffffed1021ce5e12 R11: 1ffff11021ce5e11 R12: ffff8881057ef000
R13: ffffc9000029f5c0 R14: 000000c410000000 R15: ffffc9000029f860
FS: 000055555621a300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c3207d71c8 CR3: 00000001049b8000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_writepages+0x13a/0x280 mm/page-writeback.c:2358
__filemap_fdatawrite_range+0x354/0x420 mm/filemap.c:427
file_write_and_wait_range+0x89/0x120 mm/filemap.c:766
ext4_sync_file+0x19e/0x9d0 fs/ext4/fsync.c:151
vfs_fsync_range+0x17b/0x190 fs/sync.c:202
generic_write_sync include/linux/fs.h:2796 [inline]
ext4_buffered_write_iter+0x565/0x610 fs/ext4/file.c:280
ext4_file_write_iter+0x192/0x1cd0 fs/ext4/file.c:683
call_write_iter include/linux/fs.h:1947 [inline]
new_sync_write fs/read_write.c:518 [inline]
vfs_write+0xc4a/0xf80 fs/read_write.c:605
ksys_write+0x198/0x2c0 fs/read_write.c:658
__do_sys_write fs/read_write.c:670 [inline]
__se_sys_write fs/read_write.c:667 [inline]
__x64_sys_write+0x7b/0x90 fs/read_write.c:667
do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f21224a8ef9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe71cb9ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f21224a8ef9
RDX: 0000000000000088 RSI: 0000000020000440 RDI: 0000000000000006
RBP: 00007f21224686f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2122468780
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace ea75070fa1a2c9e6 ]---
RIP: 0010:ext4_writepages+0x36f6/0x3710 fs/ext4/inode.c:2759
Code: c6 31 ff e8 fc fe 8f ff 84 db 75 2c e8 e3 fb 8f ff 48 bb 00 00 00 00 00 fc ff df 4c 8b 64 24 40 e9 28 f7 ff ff e8 ca fb 8f ff <0f> 0b e8 c3 fb 8f ff e8 fd 92 23 ff eb a0 e8 b7 fb 8f ff e8 f1 92
RSP: 0018:ffffc9000029f300 EFLAGS: 00010293
RAX: ffffffff81dcef46 RBX: 0000008000000000 RCX: ffff8881067a0000
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc9000029f6f0 R08: ffffffff81dcbf2a R09: ffffed1021ce5e12
R10: ffffed1021ce5e12 R11: 1ffff11021ce5e11 R12: ffff8881057ef000
R13: ffffc9000029f5c0 R14: 000000c410000000 R15: ffffc9000029f860
FS: 000055555621a300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c3207d71c8 CR3: 00000001049b8000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
* Struck through repros no longer work on HEAD.