INFO: task syz.9.2712:17091 blocked for more than 143 seconds.
Not tainted 6.17.0-rc1-syzkaller-00199-gdfd4b508c8c6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.2712 state:D stack:21128 pid:17091 tgid:17087 ppid:16922 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 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+0x92/0x2b0 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: 0033:0x7f237cb9038a
RSP: 002b:00007f237da14e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f237da14ef0 RCX: 00007f237cb9038a
RDX: 00002000000058c0 RSI: 0000200000005900 RDI: 00007f237da14eb0
RBP: 00002000000058c0 R08: 00007f237da14ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000005900
R13: 00007f237da14eb0 R14: 000000000000592a R15: 0000200000000200
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.17.0-rc1-syzkaller-00199-gdfd4b508c8c6 #0 PREEMPT(full)
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 20225 Comm: syz.8.3493 Not tainted 6.17.0-rc1-syzkaller-00199-gdfd4b508c8c6 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:srso_alias_safe_ret+0x0/0x7 arch/x86/lib/retpoline.S:172
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <48> 8d 64 24 08 c3 cc e8 f4 ff ff ff 0f 0b cc cc cc cc cc cc cc cc
RSP: 0018:ffffc9000432f5e8 EFLAGS: 00000086
RAX: 2ea79e6f4af54f00 RBX: ffff88813fffbc58 RCX: 2ea79e6f4af54f00
RDX: 0000000000000000 RSI: ffffffff8be334e0 RDI: ffffffff8be334a0
RBP: ffffc9000432f6a8 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f47027 R12: dffffc0000000000
R13: 0000000000000016 R14: ffffffff8216a48b R15: 1ffff92000865ec0
FS: 0000000000000000(0000) GS:ffff888125c1b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056430f10afb0 CR3: 000000000df36000 CR4: 0000000000350ef0
Call Trace:
srso_alias_return_thunk+0x5/0xfbef5 arch/x86/lib/retpoline.S:182
seqcount_lockdep_reader_access+0xb4/0x180 include/linux/seqlock.h:72
read_seqbegin include/linux/seqlock.h:836 [inline]
zone_span_seqbegin include/linux/memory_hotplug.h:103 [inline]
page_outside_zone_boundaries mm/page_alloc.c:586 [inline]
bad_range+0x8b/0x2c0 mm/page_alloc.c:605
__free_one_page+0xf4/0xbd0 mm/page_alloc.c:957
free_pcppages_bulk+0x2da/0x4e0 mm/page_alloc.c:1488
free_frozen_page_commit+0x62c/0x1070 mm/page_alloc.c:2869
__free_frozen_pages+0x67f/0xd30 mm/page_alloc.c:2923
vfree+0x25a/0x400 mm/vmalloc.c:3434
kcov_put kernel/kcov.c:439 [inline]
kcov_close+0x28/0x50 kernel/kcov.c:535
__fput+0x44c/0xa70 fs/file_table.c:468
task_work_run+0x1d4/0x260 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x6b5/0x2300 kernel/exit.c:961
do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
get_signal+0x1286/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f333998d69f
Code: Unable to access opcode bytes at 0x7f333998d675.
RSP: 002b:00007f333a8d2df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: 000000000057e000 RBX: 0000000001000000 RCX: 00007f333998d69f
RDX: 0000000001000000 RSI: 00007f332f600000 RDI: 0000000000000006
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000005a7f
R10: 0000000000000002 R11: 0000000000000293 R12: 0000000000000006
R13: 00007f333a8d2ef0 R14: 00007f333a8d2eb0 R15: 00007f332f600000