INFO: task syz.5.1260:10423 blocked for more than 163 seconds.
Not tainted 6.15.0-next-20250528-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.1260 state:D stack:25928 pid:10423 tgid:10421 ppid:6598 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5392 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6781
__schedule_loop kernel/sched/core.c:6859 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6874
netfs_wait_for_request+0x1f0/0x600 fs/netfs/misc.c:450
netfs_unbuffered_write_iter_locked+0x52a/0x910 fs/netfs/direct_write.c:110
netfs_unbuffered_write_iter+0x4c4/0x660 fs/netfs/direct_write.c:193
do_iter_readv_writev+0x515/0x6e0 fs/read_write.c:-1
vfs_writev+0x31a/0x960 fs/read_write.c:1057
do_writev+0x14d/0x2d0 fs/read_write.c:1103
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: 0033:0x7f62a158e969
RSP: 002b:00007f62a23ae038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f62a17b5fa0 RCX: 00007f62a158e969
RDX: 0000000000000002 RSI: 0000200000000000 RDI: 0000000000000006
RBP: 00007f62a1610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f62a17b5fa0 R15: 00007ffda8cd48f8
INFO: task syz.5.1260:10429 blocked for more than 165 seconds.
Not tainted 6.15.0-next-20250528-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.1260 state:D stack:24936 pid:10429 tgid:10421 ppid:6598 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5392 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6781
__schedule_loop kernel/sched/core.c:6859 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6874
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6931
rwsem_down_write_slowpath+0xbec/0x1030 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:867 [inline]
do_lock_mount+0x200/0x510 fs/namespace.c:2828
lock_mount fs/namespace.c:2873 [inline]
do_new_mount_fc fs/namespace.c:3793 [inline]
do_new_mount+0x389/0xa40 fs/namespace.c:3858
do_mount fs/namespace.c:4193 [inline]
__do_sys_mount fs/namespace.c:4404 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4381
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: 0033:0x7f62a158e969
RSP: 002b:00007f62a238d038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f62a17b6080 RCX: 00007f62a158e969
RDX: 0000200000002100 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007f62a1610ab1 R08: 0000200000002140 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f62a17b6080 R15: 00007ffda8cd48f8
INFO: task syz.5.1260:10431 blocked for more than 166 seconds.
Not tainted 6.15.0-next-20250528-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.1260 state:D stack:27240 pid:10431 tgid:10421 ppid:6598 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5392 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6781
__schedule_loop kernel/sched/core.c:6859 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6874
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6931
rwsem_down_write_slowpath+0xbec/0x1030 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:867 [inline]
do_lock_mount+0x200/0x510 fs/namespace.c:2828
lock_mount fs/namespace.c:2873 [inline]
do_new_mount_fc fs/namespace.c:3793 [inline]
do_new_mount+0x389/0xa40 fs/namespace.c:3858
do_mount fs/namespace.c:4193 [inline]
__do_sys_mount fs/namespace.c:4404 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4381
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: 0033:0x7f62a158e969
RSP: 002b:00007f62a236c038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f62a17b6160 RCX: 00007f62a158e969
RDX: 0000200000002100 RSI: 0000200000000100 RDI: 0000000000000000
RBP: 00007f62a1610ab1 R08: 0000200000002140 R09: 0000000000000000
R10: 000000000280449c R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f62a17b6160 R15: 00007ffda8cd48f8
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e13f080 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13f080 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e13f080 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by getty/5597:
#0: ffff88814c3e90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036bc2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
5 locks held by kworker/u8:17/6468:
3 locks held by syz.5.1260/10423:
#0: ffff888077561eb8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x320 fs/file.c:1213
#1: ffff88807e438428 (sb_writers#21){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3092 [inline]
#1: ffff88807e438428 (sb_writers#21){.+.+}-{0:0}, at: vfs_writev+0x288/0x960 fs/read_write.c:1055
#2: ffff8880461e0148 (&sb->s_type->i_mutex_key#27){++++}-{4:4}, at: netfs_start_io_direct+0x1ef/0x230 fs/netfs/locking.c:188
1 lock held by syz.5.1260/10429:
#0: ffff8880461e0148 (&sb->s_type->i_mutex_key#27){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#0: ffff8880461e0148 (&sb->s_type->i_mutex_key#27){++++}-{4:4}, at: do_lock_mount+0x200/0x510 fs/namespace.c:2828
1 lock held by syz.5.1260/10431:
#0: ffff8880461e0148 (&sb->s_type->i_mutex_key#27){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#0: ffff8880461e0148 (&sb->s_type->i_mutex_key#27){++++}-{4:4}, at: do_lock_mount+0x200/0x510 fs/namespace.c:2828
4 locks held by syz.3.1735/12019:
1 lock held by syz.1.1754/12079:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-next-20250528-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:470
kthread+0x711/0x8a0 kernel/kthread.c:464
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: 12019 Comm: syz.3.1735 Not tainted 6.15.0-next-20250528-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:lockdep_recursion_finish kernel/locking/lockdep.c:473 [inline]
RIP: 0010:lock_acquire+0x13d/0x360 kernel/locking/lockdep.c:5873
Code: 00 6a 00 55 ff 74 24 30 e8 e0 02 00 00 48 83 c4 28 48 c7 c7 db f6 b6 8d e8 00 45 c7 09 b8 ff ff ff ff 65 0f c1 05 93 d1 fe 10 <83> f8 01 0f 85 c9 00 00 00 48 c7 44 24 30 00 00 00 00 9c 8f 44 24
RSP: 0018:ffffc90000007ac0 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 8f052275d6e10200
RDX: 0000000000000000 RSI: ffffffff8db6f6db RDI: ffffffff8be29680
RBP: ffffffff896d0b05 R08: 0000000000000000 R09: ffffffff896d0b05
R10: dffffc0000000000 R11: ffffffff896d0ae0 R12: 0000000000000000
R13: ffff8880592ac478 R14: 0000000000000001 R15: 0000000000000246
FS: 0000000000000000(0000) GS:ffff888125c55000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa03a57fab8 CR3: 00000000497be000 CR4: 00000000003526f0
DR0: 00000000000000f8 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
garp_join_timer+0x25/0x120 net/802/garp.c:419
call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747
expire_timers kernel/time/timer.c:1798 [inline]
__run_timers kernel/time/timer.c:2372 [inline]
__run_timer_base+0x61a/0x860 kernel/time/timer.c:2384
run_timer_base kernel/time/timer.c:2393 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
handle_softirqs+0x283/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7104
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 7b 56 2a f6 e8 06 61 61 f6 fb bf 01 00 00 00 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc9000fafefc0 EFLAGS: 00000282
RAX: 8f052275d6e10200 RBX: 0000000000000000 RCX: 8f052275d6e10200
RDX: 0000000000000000 RSI: ffffffff8d98240f RDI: 0000000000000001
RBP: ffffc9000faff070 R08: ffffffff8fa132f7 R09: 1ffffffff1f4265e
R10: dffffc0000000000 R11: fffffbfff1f4265f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001f5fdf8
irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:xas_find+0x369/0x990 lib/xarray.c:1416
Code: 48 89 df e8 89 1e c0 f6 48 8b 2b 48 85 ed 0f 84 e3 04 00 00 4c 89 e0 48 c1 e8 03 48 89 44 24 20 48 8b 44 24 18 42 80 3c 28 00 <74> 08 4c 89 f7 e8 5d 1e c0 f6 4d 8b 36 4c 89 f7 4c 8b 64 24 30 4c
RSP: 0018:ffffc9000faff130 EFLAGS: 00000246
RAX: 1ffff92001f5fe49 RBX: ffffc9000faff258 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000040
RBP: ffff8880462a7440 R08: ffff888034123c00 R09: 0000000000000002
R10: 0000000000000003 R11: 0000000000000000 R12: ffffc9000faff240
R13: dffffc0000000000 R14: ffffc9000faff248 R15: 1ffff92001f5fe4b
find_get_entry mm/filemap.c:2025 [inline]
find_lock_entries+0x1ff/0xa60 mm/filemap.c:2129
shmem_undo_range+0x254/0x14b0 mm/shmem.c:1107
shmem_truncate_range mm/shmem.c:1237 [inline]
shmem_evict_inode+0x272/0xa70 mm/shmem.c:1365
evict+0x501/0x9c0 fs/inode.c:810
__dentry_kill+0x209/0x660 fs/dcache.c:669
dput+0x19f/0x2b0 fs/dcache.c:911
__fput+0x68e/0xa70 fs/file_table.c:475
task_work_run+0x1d4/0x260 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x6ad/0x22e0 kernel/exit.c:955
do_group_exit+0x21c/0x2d0 kernel/exit.c:1104
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 kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
irqentry_exit_to_user_mode+0x81/0x120 kernel/entry/common.c:184
exc_page_fault+0x9f/0xf0 arch/x86/mm/fault.c:1535
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7ffad1b8e971
Code: Unable to access opcode bytes at 0x7ffad1b8e947.
RSP: 002b:0000000000000030 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007ffad1db6080 RCX: 00007ffad1b8e969
RDX: 0000000000000000 RSI: 0000000000000030 RDI: 0000000000000600
RBP: 00007ffad1c10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000001 R14: 00007ffad1db6080 R15: 00007ffd63cdf4a8