WARNING in bfs_get

Date	Name	Commit	Repro	Result
2026/05/31	upstream (ToT)	e43ffb69e043	C	Failed due to an error; will retry later

Date

Name

Commit

Repro

Result

2026/05/31

upstream (ToT)

e43ffb69e043

Failed due to an error; will retry later

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in bfs_get_block prio:low bfs	-1	C	error		255	10h59m	111d	0/29	upstream: reported C repro on 2026/03/30 05:05
linux-6.6	WARNING in bfs_get_block origin:upstream	-1	C		error	8	21d	86d	0/2	upstream: reported C repro on 2026/04/24 05:14

Created	Duration	User	Patch	Repo	Result
2026/06/26 10:05	2h26m	bisect fix		linux-6.1.y	OK (0) job log log

Created

Duration

User

Patch

Repo

Result

2026/06/26 10:05

2h26m

bisect fix

linux-6.1.y

OK (0) job log log

loop1: detected capacity change from 0 to 64 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4514 at fs/buffer.c:1081 mark_buffer_dirty+0x328/0x5c0 fs/buffer.c:1081 Modules linked in: CPU: 0 PID: 4514 Comm: syz.1.22 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : mark_buffer_dirty+0x328/0x5c0 fs/buffer.c:1081 lr : mark_buffer_dirty+0x328/0x5c0 fs/buffer.c:1081 sp : ffff8000216775f0 x29: ffff8000216775f0 x28: ffff0000e1a76488 x27: ffff0000e1b72ae0 x26: ffff0000d9416018 x25: ffff0000d9416160 x24: 000000000000000a x23: ffff0000ebab9600 x22: 0000000000000200 x21: ffff0000eec84540 x20: 0000000000000010 x19: ffff0000e1a76488 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082dcf38 x15: 0000000000000000 x14: 0000000000000001 x13: 1fffe0001c34ec91 x12: 0000000000000000 x11: ff00800008a9d648 x10: 0000000000000000 x9 : ffff800008a9d648 x8 : ffff0000cf973800 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff0000ebab9800 x4 : ffff0000e9cf2400 x3 : ffff800008a9d350 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: mark_buffer_dirty+0x328/0x5c0 fs/buffer.c:1081 bfs_move_block fs/bfs/file.c:43 [inline] bfs_move_blocks fs/bfs/file.c:56 [inline] bfs_get_block+0x468/0x95c fs/bfs/file.c:125 __block_write_begin_int+0x3d8/0x13c0 fs/buffer.c:1991 __block_write_begin fs/buffer.c:2041 [inline] block_write_begin+0x98/0x11c fs/buffer.c:2102 bfs_write_begin+0x48/0xec fs/bfs/file.c:177 generic_perform_write+0x240/0x508 mm/filemap.c:3862 __generic_file_write_iter+0x130/0x250 mm/filemap.c:3960 generic_file_write_iter+0xb4/0x2b0 mm/filemap.c:3989 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x3c8/0x7c8 fs/read_write.c:584 ksys_write+0x12c/0x228 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 4566 hardirqs last enabled at (4565): [<ffff800008a9cd3c>] bh_lru_install fs/buffer.c:1258 [inline] hardirqs last enabled at (4565): [<ffff800008a9cd3c>] __find_get_block+0xbd8/0xde4 fs/buffer.c:1309 hardirqs last disabled at (4566): [<ffff800011b8b0d4>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (4242): [<ffff800008031254>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (4240): [<ffff800008031220>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- Unable to handle kernel paging request at virtual address dfff800000000005 KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000005] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4514 Comm: syz.1.22 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : bfs_move_block fs/bfs/file.c:42 [inline] pc : bfs_move_blocks fs/bfs/file.c:56 [inline] pc : bfs_get_block+0x424/0x95c fs/bfs/file.c:125 lr : sb_getblk include/linux/buffer_head.h:356 [inline] lr : bfs_move_block fs/bfs/file.c:41 [inline] lr : bfs_move_blocks fs/bfs/file.c:56 [inline] lr : bfs_get_block+0x3f4/0x95c fs/bfs/file.c:125 sp : ffff800021677640 x29: ffff8000216776a0 x28: 0000000000000000 x27: ffff0000e199d0e8 x26: ffff0000d9416018 x25: ffff0000d9416160 x24: 000000000000001f x23: 0000000000000028 x22: 0000000000000200 x21: ffff0000eec84540 x20: dfff800000000000 x19: 1fffe0001b282c2c x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082f2a30 x15: 0000000000000000 x14: 0000000000000001 x13: 1fffff800076e826 x12: 0000000000000000 x11: ff00800008a9f4f8 x10: 0000000000000000 x9 : ffff800008a9f4f8 x8 : 0000000000000005 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000008 x3 : ffff800008a9f2d4 x2 : 0000000000000001 x1 : 0000000000000003 x0 : 0000000000000000 Call trace: bfs_move_block fs/bfs/file.c:42 [inline] bfs_move_blocks fs/bfs/file.c:56 [inline] bfs_get_block+0x424/0x95c fs/bfs/file.c:125 __block_write_begin_int+0x3d8/0x13c0 fs/buffer.c:1991 __block_write_begin fs/buffer.c:2041 [inline] block_write_begin+0x98/0x11c fs/buffer.c:2102 bfs_write_begin+0x48/0xec fs/bfs/file.c:177 generic_perform_write+0x240/0x508 mm/filemap.c:3862 __generic_file_write_iter+0x130/0x250 mm/filemap.c:3960 generic_file_write_iter+0xb4/0x2b0 mm/filemap.c:3989 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x3c8/0x7c8 fs/read_write.c:584 ksys_write+0x12c/0x228 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Code: 97e6045d 9100a397 f9401376 d343fee8 (38746908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97e6045d bl 0xffffffffff981174 4: 9100a397 add x23, x28, #0x28 8: f9401376 ldr x22, [x27, #32] c: d343fee8 lsr x8, x23, #3 * 10: 38746908 ldrb w8, [x8, x20] <-- trapping instruction

Crashes (4):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/07/19 07:56	linux-6.1.y	090666d3cc90	72524a66	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image] [mounted in repro]	ci2-linux-6-1-kasan-arm64	WARNING in bfs_get_block
2026/07/19 05:59	linux-6.1.y	090666d3cc90	72524a66	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image] [mounted in repro]	ci2-linux-6-1-kasan-arm64	WARNING in bfs_get_block
2026/05/27 09:36	linux-6.1.y	dcbcab9d7079	2b01f00e	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image] [mounted in repro]	ci2-linux-6-1-kasan-arm64	WARNING in bfs_get_block
2026/05/07 22:50	linux-6.1.y	4931e0e1673d	cbf9e0fc	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan	WARNING in bfs_get_block

Crashes (4):

Assets (help?)