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kernel BUG in ocfs2_claim_suballoc_bits

Status: upstream: reported C repro on 2024/10/28 07:17
Reported-by: syzbot+f526a0c9abb316ed23be@syzkaller.appspotmail.com
First crash: 507d, last: 68d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2026/03/10 upstream (ToT) b4f0dd314b39 C Failed due to an error; will retry later
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in ocfs2_claim_suballoc_bits ocfs2 -1 C inconclusive 1706 94d 574d 29/29 fixed on 2026/01/07 12:29
linux-6.1 kernel BUG in ocfs2_claim_suballoc_bits -1 C error 36 72d 471d 0/3 upstream: reported C repro on 2024/12/02 23:45
linux-6.6 kernel BUG in ocfs2_claim_suballoc_bits origin:lts-only -1 C inconclusive 7 83d 130d 0/2 upstream: reported C repro on 2025/11/09 13:08
▶ ▼ Last patch testing requests (5)
Created Duration User Patch Repo Result
2026/02/21 20:07 25m retest repro linux-5.15.y report log
2026/02/21 20:07 16m retest repro linux-5.15.y report log
2026/02/07 13:59 20m retest repro linux-5.15.y OK log
2026/01/10 13:24 10m retest repro linux-5.15.y report log
2025/12/13 18:43 14m retest repro linux-5.15.y report log
▶ ▼ Fix bisection attempts (7)
Created Duration User Patch Repo Result
2026/02/09 13:42 0m bisect fix linux-5.15.y error job log
2025/11/29 10:28 2h04m bisect fix linux-5.15.y OK (0) job log log
2025/10/28 07:55 2h40m bisect fix linux-5.15.y OK (0) job log log
2025/08/30 00:37 1h34m bisect fix linux-5.15.y OK (0) job log log
2025/07/26 06:22 1h42m bisect fix linux-5.15.y OK (0) job log log
2025/05/29 00:59 1h46m bisect fix linux-5.15.y OK (0) job log log
2025/04/25 20:35 1h29m bisect fix linux-5.15.y OK (0) job log log

Sample crash report:
=======================================================
ocfs2: Slot 0 on device (7,0) was already allocated to this node!
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:1387!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4021 Comm: syz-executor261 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1387 [inline]
pc : ocfs2_claim_suballoc_bits+0x19f0/0x1b74 fs/ocfs2/suballoc.c:1927
lr : ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1387 [inline]
lr : ocfs2_claim_suballoc_bits+0x19f0/0x1b74 fs/ocfs2/suballoc.c:1927
sp : ffff80001f106c80
x29: ffff80001f106ec0 x28: 1fffe000183a5e61 x27: 1fffe000183a5e66
x26: ffff80001f106d40 x25: 0000000000000000 x24: dfff800000000000
x23: ffff700003e20da8 x22: 0000000000000100 x21: ffff0000c1d2f330
x20: ffff0000e2a7be00 x19: ffff0000e2a7bec6 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000111a97c4 x15: 00000000fffffffc
x14: 0000000000ff0100 x13: ffffffffffffffff x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff800009ce1da4
x8 : ffff0000da990000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff80001f1071f0 x4 : ffff80001f106f80 x3 : 0000000000000100
x2 : 0000000000000100 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1387 [inline]
 ocfs2_claim_suballoc_bits+0x19f0/0x1b74 fs/ocfs2/suballoc.c:1927
 __ocfs2_claim_clusters+0x26c/0x7e0 fs/ocfs2/suballoc.c:2338
 ocfs2_claim_clusters+0x8c/0xd4 fs/ocfs2/suballoc.c:2375
 ocfs2_local_alloc_new_window fs/ocfs2/localalloc.c:1170 [inline]
 ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1299 [inline]
 ocfs2_reserve_local_alloc_bits+0x1188/0x260c fs/ocfs2/localalloc.c:668
 ocfs2_reserve_clusters_with_limit+0x198/0x9e0 fs/ocfs2/suballoc.c:1162
 ocfs2_reserve_clusters+0x3c/0x50 fs/ocfs2/suballoc.c:1223
 ocfs2_mknod+0xc10/0x1e88 fs/ocfs2/namei.c:354
 ocfs2_mkdir+0x180/0x468 fs/ocfs2/namei.c:657
 vfs_mkdir+0x314/0x4d4 fs/namei.c:4065
 do_mkdirat+0x1bc/0x508 fs/namei.c:4090
 __do_sys_mkdirat fs/namei.c:4105 [inline]
 __se_sys_mkdirat fs/namei.c:4103 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4103
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: d4210000 979e5b21 d4210000 979e5b1f (d4210000) 
---[ end trace a2e2fa493bc74c67 ]---

Crashes (33):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/08 21:22 linux-5.15.y 1c700860e8bc 4826c28e .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/02/08 09:21 linux-5.15.y c16c81c81336 ef44b750 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/12/26 06:28 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/12/26 06:00 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/03/08 03:19 linux-5.15.y c16c81c81336 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/02/27 04:52 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/02/27 04:52 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/02/21 01:17 linux-5.15.y c16c81c81336 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/02/21 01:15 linux-5.15.y c16c81c81336 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/02/04 14:26 linux-5.15.y c16c81c81336 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/02/04 14:26 linux-5.15.y c16c81c81336 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/01/31 00:14 linux-5.15.y 003148680b79 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/01/31 00:14 linux-5.15.y 003148680b79 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/01/26 02:48 linux-5.15.y 003148680b79 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/01/26 02:47 linux-5.15.y 003148680b79 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/01/15 16:16 linux-5.15.y 4735586da88e 7315a7cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2024/10/28 08:20 linux-5.15.y 74cdd62cb470 65e8686b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2024/10/28 07:16 linux-5.15.y 74cdd62cb470 65e8686b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_claim_suballoc_bits
2025/06/08 20:29 linux-5.15.y 1c700860e8bc 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/02/27 04:00 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/02/21 04:50 linux-5.15.y c16c81c81336 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/02/21 04:48 linux-5.15.y c16c81c81336 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/02/21 00:34 linux-5.15.y c16c81c81336 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/02/21 00:34 linux-5.15.y c16c81c81336 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/02/08 09:06 linux-5.15.y c16c81c81336 ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/01/25 22:36 linux-5.15.y 003148680b79 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/01/25 22:34 linux-5.15.y 003148680b79 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/01/25 03:59 linux-5.15.y 003148680b79 1293872d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/01/07 22:30 linux-5.15.y 91786f140358 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/01/07 21:17 linux-5.15.y 91786f140358 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/01/07 08:16 linux-5.15.y 91786f140358 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/01/07 01:32 linux-5.15.y 91786f140358 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2024/12/02 22:28 linux-5.15.y 0a51d2d4527b b499ea68 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_claim_suballoc_bits
* Struck through repros no longer work on HEAD.