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kernel BUG in ext4_writepages

Status: upstream: reported C repro on 2023/03/13 06:22
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+84277fde3a1f96f51f90@syzkaller.appspotmail.com
First crash: 408d, last: 1d12h
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2023/05/07 upstream (ToT) fc4354c6e5c2 C [report] kernel BUG in ext4_do_writepages
▶ ▼ Similar bugs (9)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 kernel BUG at fs/ext4/inode.c:LINE! ext4 C error 145 414d 1288d 0/1 upstream: reported C repro on 2020/10/14 01:19
android-54 kernel BUG at fs/ext4/inode.c:LINE! ext4 C 159 15h30m 1561d 0/2 upstream: reported C repro on 2020/01/14 12:13
linux-4.14 kernel BUG at fs/ext4/inode.c:LINE! ext4 C 11 422d 1216d 0/1 upstream: reported C repro on 2020/12/25 03:51
linux-6.1 kernel BUG in ext4_writepages origin:upstream C 53 1d00h 408d 0/3 upstream: reported C repro on 2023/03/12 17:26
android-5-15 kernel BUG in ext4_writepages ext4 origin:upstream C error 77 6d22h 553d 0/2 upstream: reported C repro on 2022/10/18 14:12
android-5-10 kernel BUG in ext4_writepages C error 5 553d 715d 2/2 fixed on 2022/11/16 18:44
android-6-1 kernel BUG in ext4_writepages origin:upstream C error 34 1d06h 324d 0/2 upstream: reported C repro on 2023/06/05 07:33
upstream kernel BUG in mpage_prepare_extent_to_map ext4 C done error 145 498d 1059d 0/26 auto-obsoleted due to no activity on 2024/03/07 20:46
android-5-10 kernel BUG in ext4_writepages (2) ext4 C error inconclusive 116 1d12h 514d 0/2 upstream: reported C repro on 2022/11/27 00:51
▶ ▼ Fix bisection attempts (2)
Created Duration User Patch Repo Result
2023/10/12 20:22 0m bisect fix linux-5.15.y error job log (0)
2023/04/26 05:38 39m bisect fix linux-5.15.y job log (0) log

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2722!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 1229 Comm: kworker/u4:4 Not tainted 5.15.153-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:ext4_writepages+0x3d02/0x3d10 fs/ext4/inode.c:2721
Code: c7 d0 84 a8 8c 4c 89 f2 e8 5b e7 0b 02 e9 bb fb ff ff e8 b1 ee 62 ff 0f 0b e8 ea ad fe 07 e8 a5 ee 62 ff 0f 0b e8 9e ee 62 ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 41 56 41 54 53 49
RSP: 0018:ffffc9000499ef60 EFLAGS: 00010293
RAX: ffffffff821d4b12 RBX: 0000008000000000 RCX: ffff88801d2a0000
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc9000499f350 R08: ffffffff821d14b0 R09: ffffed100e01514a
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc9000499f220
R13: ffffc9000499f710 R14: 0000008410000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbe3ef386d8 CR3: 000000000c68e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0x481/0x730 mm/page-writeback.c:2364
 __writeback_single_inode+0x15b/0xe30 fs/fs-writeback.c:1647
 writeback_sb_inodes+0xbce/0x1a40 fs/fs-writeback.c:1930
 wb_writeback+0x451/0xc50 fs/fs-writeback.c:2104
 wb_do_writeback fs/fs-writeback.c:2247 [inline]
 wb_workfn+0x46c/0x1130 fs/fs-writeback.c:2288
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
Modules linked in:
---[ end trace 971ad5848c6c448b ]---
RIP: 0010:ext4_writepages+0x3d02/0x3d10 fs/ext4/inode.c:2721
Code: c7 d0 84 a8 8c 4c 89 f2 e8 5b e7 0b 02 e9 bb fb ff ff e8 b1 ee 62 ff 0f 0b e8 ea ad fe 07 e8 a5 ee 62 ff 0f 0b e8 9e ee 62 ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 41 56 41 54 53 49
RSP: 0018:ffffc9000499ef60 EFLAGS: 00010293
RAX: ffffffff821d4b12 RBX: 0000008000000000 RCX: ffff88801d2a0000
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc9000499f350 R08: ffffffff821d14b0 R09: ffffed100e01514a
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc9000499f220
R13: ffffc9000499f710 R14: 0000008410000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbe3ef386d8 CR3: 000000000c68e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (37):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/05 16:14 linux-5.15.y 9465fef4ae35 77230c29 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/02/24 15:30 linux-5.15.y 458ce51d0356 8d446f15 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/01/02 07:40 linux-5.15.y d93fa2c78854 fb427a07 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/12/31 02:46 linux-5.15.y d93fa2c78854 fb427a07 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/11/18 12:48 linux-5.15.y 80529b4968a8 cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/03/27 03:52 linux-5.15.y 115472395b0a fbf0499a .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/03/13 06:22 linux-5.15.y bbf9f29bac04 5205ef30 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in ext4_writepages
2023/07/12 13:07 linux-5.15.y d54cfc420586 2f19aa4f .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/06/23 03:12 linux-5.15.y f67653019430 79782afc .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/03/26 20:09 linux-5.15.y 115472395b0a fbf0499a .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/12/05 11:17 linux-5.15.y 9b91d36ba301 f819d6f7 .config console log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/06/25 20:17 linux-5.15.y f67653019430 79782afc .config console log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/04/15 13:36 linux-5.15.y fa3df276cd36 b9af7e61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/04/13 23:24 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/04/13 15:57 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/04/08 09:03 linux-5.15.y 9465fef4ae35 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/04/08 09:03 linux-5.15.y 9465fef4ae35 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/04/08 04:43 linux-5.15.y 9465fef4ae35 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/04/08 04:42 linux-5.15.y 9465fef4ae35 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/04/07 09:02 linux-5.15.y 9465fef4ae35 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/04/07 02:26 linux-5.15.y 9465fef4ae35 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/04/07 02:26 linux-5.15.y 9465fef4ae35 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/04/07 02:26 linux-5.15.y 9465fef4ae35 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/02/27 11:42 linux-5.15.y 458ce51d0356 05e69c83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/02/19 19:13 linux-5.15.y 6139f2a02fe0 3af7dd65 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/11/07 00:36 linux-5.15.y 12952a23a5da 78fae24e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/10/23 16:24 linux-5.15.y 00c03985402e 989a3687 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/09/07 00:38 linux-5.15.y aff03380bda4 72324844 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2024/04/22 23:43 linux-5.15.y c52b9710c83d 36c961ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ext4_writepages
2024/04/16 12:57 linux-5.15.y fa3df276cd36 0d592ce4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ext4_writepages
2023/08/19 18:20 linux-5.15.y f6f7927ac664 d216d8a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/08/05 04:01 linux-5.15.y 38d4ca22a528 cdae481e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/07/20 20:18 linux-5.15.y d54cfc420586 f49af159 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/06/05 18:12 linux-5.15.y d7af3e5ba454 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/05/11 23:29 linux-5.15.y b0ece631f84a adb9a3cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/05/09 05:42 linux-5.15.y 8a7f2a5c5aa1 c7a5e2a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
2023/05/02 17:09 linux-5.15.y 8a7f2a5c5aa1 52d40fd2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ext4_writepages
* Struck through repros no longer work on HEAD.