syzbot

 sign-in | mailing list | source | docs
🐞 Open [858]
🐞 Fixed [87]
🐞 Invalid [1359]
⬇ Missing Backports [132]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

kernel BUG in hfs_write_inode

Status: upstream: reported C repro on 2023/04/10 13:50
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+2b311dee7c3dadfc1a7e@syzkaller.appspotmail.com
First crash: 1168d, last: 8h38m
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2024/04/20 upstream (ToT) 13a2e429f644 C [report] kernel BUG in hfs_write_inode
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 kernel BUG in hfs_write_inode origin:upstream missing-backport -1 C inconclusive 26628 47m 1174d 0/3 upstream: reported C repro on 2023/04/04 07:01
linux-4.14 kernel BUG in hfs_write_inode hfs -1 C 3 1204d 1296d 0/1 upstream: reported C repro on 2022/12/02 20:03
linux-4.19 kernel BUG in hfs_write_inode hfs -1 C 24 1202d 1303d 0/1 upstream: reported C repro on 2022/11/26 01:52
linux-6.6 kernel BUG in hfs_write_inode origin:upstream missing-backport -1 C done 10455 1h20m 370d 0/2 upstream: reported C repro on 2025/06/16 18:04
upstream kernel BUG in hfs_write_inode hfs prio:high -1 C error 214157 15m 1304d 0/29 upstream: reported C repro on 2022/11/25 09:45

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/hfs/inode.c:447!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 144 Comm: kworker/u4:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:hfs_write_inode+0xa1a/0xa20 fs/hfs/inode.c:447
Code: 8d ff e9 09 fe ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 54 fe ff ff 4c 89 f7 e8 a0 99 8d ff e9 47 fe ff ff e8 46 8e 48 ff <0f> 0b 0f 1f 40 00 55 41 57 41 56 41 54 53 48 89 fb 49 bf 00 00 00
RSP: 0018:ffffc9000164f3c0 EFLAGS: 00010293
RAX: ffffffff823092ca RBX: ffff88807d109518 RCX: ffff88801bee1dc0
RDX: 0000000000000000 RSI: ffffffff8c4e2c80 RDI: 0000000000000000
RBP: ffffc9000164f550 R08: ffff88801bee1dc0 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff920002c9e7c R14: 0000000000000000 R15: ffff88807d1094d8
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000029512913d188 CR3: 0000000017b7e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 write_inode fs/fs-writeback.c:1505 [inline]
 __writeback_single_inode+0x6c3/0xda0 fs/fs-writeback.c:1715
 writeback_sb_inodes+0xa4e/0x1680 fs/fs-writeback.c:1940
 wb_writeback+0x45d/0xbe0 fs/fs-writeback.c:2114
 wb_do_writeback fs/fs-writeback.c:2257 [inline]
 wb_workfn+0x43a/0xf20 fs/fs-writeback.c:2298
 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace 22a5290c7d1f5709 ]---
RIP: 0010:hfs_write_inode+0xa1a/0xa20 fs/hfs/inode.c:447
Code: 8d ff e9 09 fe ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 54 fe ff ff 4c 89 f7 e8 a0 99 8d ff e9 47 fe ff ff e8 46 8e 48 ff <0f> 0b 0f 1f 40 00 55 41 57 41 56 41 54 53 48 89 fb 49 bf 00 00 00
RSP: 0018:ffffc9000164f3c0 EFLAGS: 00010293
RAX: ffffffff823092ca RBX: ffff88807d109518 RCX: ffff88801bee1dc0
RDX: 0000000000000000 RSI: ffffffff8c4e2c80 RDI: 0000000000000000
RBP: ffffc9000164f550 R08: ffff88801bee1dc0 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff920002c9e7c R14: 0000000000000000 R15: ffff88807d1094d8
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f20fc9ed6c8 CR3: 000000007dca3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (19898):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/04/16 08:08 linux-5.15.y 91d48252ad4b df15c5f3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/01/04 20:10 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/01/04 17:55 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/01/04 15:44 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/01/04 13:29 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/01/04 11:08 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/01/04 08:37 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/01/04 06:19 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/01/04 04:02 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/01/04 01:45 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2025/12/15 04:59 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2025/12/03 23:40 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2025/08/25 21:48 linux-5.15.y c79648372d02 bf27483f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2025/05/17 19:02 linux-5.15.y 3b8db0e4f263 f41472b0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2024/12/24 06:40 linux-5.15.y 91786f140358 444551c4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2024/10/14 05:50 linux-5.15.y 3a5928702e71 084d8178 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2024/04/05 11:35 linux-5.15.y 9465fef4ae35 0ee3535e .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2025/02/26 07:06 linux-5.15.y c16c81c81336 d34966d1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in hfs_write_inode
2025/02/08 08:09 linux-5.15.y c16c81c81336 ef44b750 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in hfs_write_inode
2024/08/23 10:45 linux-5.15.y fa93fa65db6e ce8a9099 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in hfs_write_inode
2024/08/23 09:34 linux-5.15.y fa93fa65db6e ce8a9099 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in hfs_write_inode
2024/05/14 20:33 linux-5.15.y 284087d4f7d5 fdb4c10c .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in hfs_write_inode
2024/04/14 03:18 linux-5.15.y fa3df276cd36 c8349e48 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in hfs_write_inode
2023/09/29 04:38 linux-5.15.y b911329317b4 d265efd8 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in hfs_write_inode
2023/05/22 07:39 linux-5.15.y 9d6bde853685 4bce1a3e .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in hfs_write_inode
2023/06/18 10:10 linux-5.15.y 471e639e59d1 f3921d4d .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/21 10:54 linux-5.15.y eceeec79dbc6 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/21 05:04 linux-5.15.y eceeec79dbc6 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/21 01:59 linux-5.15.y eceeec79dbc6 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/20 21:05 linux-5.15.y eceeec79dbc6 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/20 10:03 linux-5.15.y eceeec79dbc6 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/20 07:44 linux-5.15.y eceeec79dbc6 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/20 01:40 linux-5.15.y eceeec79dbc6 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/19 21:49 linux-5.15.y eceeec79dbc6 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/19 20:51 linux-5.15.y eceeec79dbc6 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/19 15:01 linux-5.15.y eceeec79dbc6 570c59ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/19 13:44 linux-5.15.y eceeec79dbc6 570c59ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/19 13:18 linux-5.15.y eceeec79dbc6 570c59ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/19 09:17 linux-5.15.y dc027a595035 570c59ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/19 08:09 linux-5.15.y dc027a595035 570c59ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/19 05:55 linux-5.15.y dc027a595035 a776b0d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/19 03:09 linux-5.15.y dc027a595035 a776b0d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/19 03:00 linux-5.15.y dc027a595035 a776b0d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/18 16:58 linux-5.15.y dc027a595035 a776b0d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/18 10:42 linux-5.15.y dc027a595035 a776b0d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/18 07:06 linux-5.15.y dc027a595035 b62b3ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/18 05:54 linux-5.15.y dc027a595035 b62b3ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/18 05:54 linux-5.15.y dc027a595035 b62b3ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/17 21:28 linux-5.15.y dc027a595035 b62b3ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/17 16:54 linux-5.15.y dc027a595035 b62b3ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/17 15:48 linux-5.15.y dc027a595035 b62b3ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/17 00:36 linux-5.15.y dc027a595035 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/16 23:29 linux-5.15.y dc027a595035 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/16 20:32 linux-5.15.y dc027a595035 a3998659 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/16 17:23 linux-5.15.y dc027a595035 a3998659 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/16 17:13 linux-5.15.y dc027a595035 a3998659 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/16 13:06 linux-5.15.y dc027a595035 a3998659 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/16 09:19 linux-5.15.y dc027a595035 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/15 23:37 linux-5.15.y dc027a595035 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/15 22:32 linux-5.15.y dc027a595035 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/15 18:17 linux-5.15.y dc027a595035 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/15 15:05 linux-5.15.y dc027a595035 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/15 14:09 linux-5.15.y dc027a595035 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/15 10:20 linux-5.15.y dc027a595035 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/15 06:57 linux-5.15.y dc027a595035 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/15 05:32 linux-5.15.y dc027a595035 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/15 03:06 linux-5.15.y dc027a595035 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/15 01:54 linux-5.15.y dc027a595035 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/15 01:53 linux-5.15.y dc027a595035 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/14 22:41 linux-5.15.y dc027a595035 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/14 20:11 linux-5.15.y dc027a595035 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/14 15:16 linux-5.15.y dc027a595035 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/14 13:10 linux-5.15.y dc027a595035 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/14 10:46 linux-5.15.y dc027a595035 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2026/06/14 09:10 linux-5.15.y dc027a595035 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
2025/08/28 14:15 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in hfs_write_inode
2023/04/10 13:50 linux-5.15.y d86dfc4d95cd 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in hfs_write_inode
* Struck through repros no longer work on HEAD.