INFO: task syz-executor116:5638 blocked for more than 143 seconds.
Not tainted 6.6.0-rc6-syzkaller-00039-g06dc10eae55b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor116 state:D stack:26512 pid:5638 ppid:5032 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x5a10 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
wait_on_state fs/btrfs/extent-io-tree.c:719 [inline]
wait_extent_bit+0x578/0x670 fs/btrfs/extent-io-tree.c:763
lock_extent+0x104/0x190 fs/btrfs/extent-io-tree.c:1755
btrfs_page_mkwrite+0x653/0x11e0 fs/btrfs/inode.c:8143
do_page_mkwrite+0x17a/0x380 mm/memory.c:2931
wp_page_shared mm/memory.c:3291 [inline]
do_wp_page+0xc66/0x3420 mm/memory.c:3376
handle_pte_fault mm/memory.c:4994 [inline]
__handle_mm_fault+0x1d1b/0x3e10 mm/memory.c:5119
handle_mm_fault+0x478/0xa00 mm/memory.c:5284
do_user_addr_fault+0x3d1/0x1000 arch/x86/mm/fault.c:1413
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1561
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:rep_movs_alternative+0x33/0x70 arch/x86/lib/copy_user_64.S:58
Code: 40 83 f9 08 73 21 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 8b 06 <48> 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb
RSP: 0018:ffffc90005807720 EFLAGS: 00050206
RAX: 0000000000000000 RBX: 0000000000000038 RCX: 0000000000000038
RDX: fffff52000b00efb RSI: ffffc900058077a0 RDI: 0000000020000120
RBP: 0000000020000120 R08: 0000000000000000 R09: fffff52000b00efa
R10: ffffc900058077d7 R11: ffffffff8a60008b R12: ffffc900058077a0
R13: 0000000020000158 R14: 0000000000000000 R15: 0000000000000000
copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:133 [inline]
_copy_to_user lib/usercopy.c:41 [inline]
_copy_to_user+0xa8/0xb0 lib/usercopy.c:34
copy_to_user include/linux/uaccess.h:191 [inline]
fiemap_fill_next_extent+0x232/0x380 fs/ioctl.c:145
emit_fiemap_extent+0x195/0x380 fs/btrfs/extent_io.c:2472
fiemap_process_hole+0x52d/0x620 fs/btrfs/extent_io.c:2730
extent_fiemap+0x12be/0x19f0 fs/btrfs/extent_io.c:2945
btrfs_fiemap+0xe4/0x160 fs/btrfs/inode.c:7815
ioctl_fiemap fs/ioctl.c:220 [inline]
do_vfs_ioctl+0x339/0x1920 fs/ioctl.c:811
__do_sys_ioctl fs/ioctl.c:869 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__x64_sys_ioctl+0x112/0x210 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fcd3af72e19
RSP: 002b:00007fcd3af0e218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fcd3afff6d8 RCX: 00007fcd3af72e19
RDX: 0000000020000100 RSI: 00000000c020660b RDI: 0000000000000005
RBP: 00007fcd3afff6d0 R08: 00007ffd9ffca257 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcd3afcc1b0
R13: 61635f65646f6e69 R14: 65646f7475616f6e R15: 7261637369646f6e
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8cba7960 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff8cba7960 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff8cba7960 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/4783:
#0: ffff88814bd420a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900020682f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
4 locks held by syz-executor116/5638:
#0: ffff88806d407650 (&sb->s_type->i_mutex_key#15){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88806d407650 (&sb->s_type->i_mutex_key#15){++++}-{3:3}, at: btrfs_inode_lock+0xf9/0x100 fs/btrfs/inode.c:369
#1: ffff88807d512420 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#1: ffff88807d512420 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5311 [inline]
#1: ffff88807d512420 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x35/0x760 mm/memory.c:5371
#2: ffff88807b37c508 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x17a/0x380 mm/memory.c:2931
#3: ffff88806d4074d8 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x6e4/0x11e0 fs/btrfs/inode.c:8132
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.6.0-rc6-syzkaller-00039-g06dc10eae55b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 47 Comm: kworker/u4:3 Not tainted 6.6.0-rc6-syzkaller-00039-g06dc10eae55b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:x2apic_send_IPI+0x3c/0xe0 arch/x86/kernel/apic/x2apic_phys.c:46
Code: 1a 02 00 48 83 fd 07 0f 87 a6 00 00 00 48 8d 3c ed 40 ba 5c 8c 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 7d 48 03 1c ed 40 ba 5c 8c 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffffc90000d8f900 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000021a0c RCX: 0000000000000000
RDX: 1ffffffff18b9749 RSI: 00000000000000fb RDI: ffffffff8c5cba48
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 00000000000000fb
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b983d910
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d3cf0c3680 CR3: 000000000c976000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_send_call_function_single_ipi arch/x86/include/asm/smp.h:103 [inline]
send_call_function_single_ipi kernel/smp.c:117 [inline]
smp_call_function_many_cond+0x12df/0x1570 kernel/smp.c:826
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1012
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2006 [inline]
text_poke_bp_batch+0x746/0x960 arch/x86/kernel/alternative.c:2299
text_poke_flush arch/x86/kernel/alternative.c:2407 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2404 [inline]
text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2414
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x32e/0x410 kernel/jump_label.c:829
static_key_enable_cpuslocked+0x1b5/0x270 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate mm/kfence/core.c:830 [inline]
toggle_allocation_gate+0xf4/0x250 mm/kfence/core.c:822
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.250 msecs