INFO: task syz.0.1088:15617 blocked for more than 143 seconds.
Tainted: G W 6.17.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.1088 state:D stack:15112 pid:15617 tgid:15616 ppid:14542 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
schedule_timeout+0x9a/0x270 kernel/time/sleep_timeout.c:75
___down_common kernel/locking/semaphore.c:268 [inline]
__down_common+0x319/0x6a0 kernel/locking/semaphore.c:293
down+0x80/0xd0 kernel/locking/semaphore.c:100
bch2_run_recovery_passes+0x177/0x210 fs/bcachefs/recovery_passes.c:609
bch2_fs_recovery+0x28c9/0x3a50 fs/bcachefs/recovery.c:1050
bch2_fs_start+0xaaf/0xda0 fs/bcachefs/super.c:1213
bch2_fs_get_tree+0xb39/0x1520 fs/bcachefs/fs.c:2488
vfs_get_tree+0x8f/0x2b0 fs/super.c:1815
do_new_mount+0x2a2/0x9e0 fs/namespace.c:3805
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4321
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f84bd54038a
RSP: 002b:00007f84bb7a5e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f84bb7a5ef0 RCX: 00007f84bd54038a
RDX: 00002000000000c0 RSI: 00002000000003c0 RDI: 00007f84bb7a5eb0
RBP: 00002000000000c0 R08: 00007f84bb7a5ef0 R09: 0000000000810000
R10: 0000000000810000 R11: 0000000000000246 R12: 00002000000003c0
R13: 00007f84bb7a5eb0 R14: 000000000000593a R15: 00002000000006c0
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 39 Comm: khungtaskd Tainted: G W 6.17.0-rc2-syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
watchdog+0xf93/0xfe0 kernel/hung_task.c:491
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 17945 Comm: syz.1.1324 Tainted: G W 6.17.0-rc2-syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline]
RIP: 0010:mem_cgroup_disabled include/linux/memcontrol.h:545 [inline]
RIP: 0010:__mod_lruvec_state mm/memcontrol.c:774 [inline]
RIP: 0010:__lruvec_stat_mod_folio+0x191/0x2f0 mm/memcontrol.c:795
Code: 00 0f 85 12 01 00 00 43 80 7c 35 00 00 74 08 48 89 ef e8 a2 d5 fc ff 48 8b 7d 00 44 8b 74 24 04 49 63 d6 89 de e8 df eb dd ff <66> 90 4c 89 e7 89 de 44 89 f2 e8 e0 fa ff ff f3 0f 1e fa e8 b7 5f
RSP: 0018:ffffc90003faf798 EFLAGS: 00000286
RAX: 0000000080000000 RBX: 0000000000000013 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8b150d00 RDI: 00000000ffffffff
RBP: ffff88801ae9c448 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1e3a787 R12: ffff88801ae9c348
R13: 1ffff110035d3889 R14: 0000000000000001 R15: ffff88813fffb740
FS: 00007f9b51a056c0(0000) GS:ffff8881269c5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa830bac000 CR3: 0000000053d66000 CR4: 00000000003526f0
Call Trace:
shmem_update_stats mm/shmem.c:894 [inline]
shmem_add_to_page_cache+0x8be/0xbc0 mm/shmem.c:945
shmem_alloc_and_add_folio mm/shmem.c:1973 [inline]
shmem_get_folio_gfp+0x7d2/0x1a70 mm/shmem.c:2597
shmem_get_folio mm/shmem.c:2703 [inline]
shmem_write_begin+0xef/0x2a0 mm/shmem.c:3353
generic_perform_write+0x29a/0x8c0 mm/filemap.c:4175
shmem_file_write_iter+0xfb/0x120 mm/shmem.c:3528
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5d2/0xb40 fs/read_write.c:686
ksys_write+0x14b/0x260 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9b537bd69f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007f9b51a04df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f9b537bd69f
RDX: 0000000001000000 RSI: 00007f9b495e5000 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000058e0
R10: 0000200000005942 R11: 0000000000000293 R12: 0000000000000007
R13: 00007f9b51a04ef0 R14: 00007f9b51a04eb0 R15: 00007f9b495e5000