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Message-ID: <66f6c8ce.050a0220.46d20.001c.GAE@google.com>
Date: Fri, 27 Sep 2024 08:01:34 -0700
From: syzbot <syzbot+79c403850e6816dc39cf@...kaller.appspotmail.com>
To: amir73il@...il.com, jack@...e.cz, linux-fsdevel@...r.kernel.org,
linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [fs?] possible deadlock in input_inject_event
Hello,
syzbot found the following issue on:
HEAD commit: 2a17bb8c204f Merge tag 'devicetree-for-6.12' of git://git...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15953b00580000
kernel config: https://syzkaller.appspot.com/x/.config?x=c208b3605ba9ec44
dashboard link: https://syzkaller.appspot.com/bug?extid=79c403850e6816dc39cf
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/940305284b35/disk-2a17bb8c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/7ae2e1a8e92e/vmlinux-2a17bb8c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/414282d3b1f3/bzImage-2a17bb8c.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+79c403850e6816dc39cf@...kaller.appspotmail.com
=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
6.11.0-syzkaller-05591-g2a17bb8c204f #0 Not tainted
-----------------------------------------------------
syz.4.5212/19229 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff88807f685da0 (&f_owner->lock){....}-{2:2}, at: send_sigio+0x37/0x390 fs/fcntl.c:910
and this task is already holding:
ffff88807f3b9750 (&new->fa_lock){...-}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1127 [inline]
ffff88807f3b9750 (&new->fa_lock){...-}-{2:2}, at: kill_fasync+0x199/0x4f0 fs/fcntl.c:1151
which would create a new lock dependency:
(&new->fa_lock){...-}-{2:2} -> (&f_owner->lock){....}-{2:2}
but this new dependency connects a SOFTIRQ-irq-safe lock:
(&dev->event_lock#2){..-.}-{2:2}
... which became SOFTIRQ-irq-safe at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
input_inject_event+0xc5/0x340 drivers/input/input.c:423
kd_sound_helper+0x101/0x210 drivers/tty/vt/keyboard.c:256
input_handler_for_each_handle+0x105/0x1d0 drivers/input/input.c:2676
call_timer_fn+0x190/0x650 kernel/time/timer.c:1794
expire_timers kernel/time/timer.c:1845 [inline]
__run_timers kernel/time/timer.c:2419 [inline]
__run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430
run_timer_base kernel/time/timer.c:2439 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449
handle_softirqs+0x2c7/0x980 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1037
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
spin_unlock_irq include/linux/spinlock.h:401 [inline]
filemap_remove_folio+0x110/0x2e0 mm/filemap.c:265
truncate_inode_folio+0x5d/0x70 mm/truncate.c:178
shmem_undo_range+0x45d/0x1df0 mm/shmem.c:1019
shmem_truncate_range mm/shmem.c:1132 [inline]
shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1260
evict+0x4ea/0x9b0 fs/inode.c:731
__dentry_kill+0x20d/0x630 fs/dcache.c:615
dput+0x19f/0x2b0 fs/dcache.c:857
__fput+0x5d2/0x880 fs/file_table.c:439
task_work_run+0x251/0x310 kernel/task_work.c:228
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
to a SOFTIRQ-irq-unsafe lock:
(tasklist_lock){.+.+}-{2:2}
... which became SOFTIRQ-irq-unsafe at:
...
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
__do_wait+0x12d/0x850 kernel/exit.c:1591
do_wait+0x1e9/0x560 kernel/exit.c:1635
kernel_wait+0xe9/0x240 kernel/exit.c:1811
call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
call_usermodehelper_exec_work+0xbd/0x230 kernel/umh.c:164
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
other info that might help us debug this:
Chain exists of:
&dev->event_lock#2 --> &new->fa_lock --> tasklist_lock
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(tasklist_lock);
local_irq_disable();
lock(&dev->event_lock#2);
lock(&new->fa_lock);
<Interrupt>
lock(&dev->event_lock#2);
*** DEADLOCK ***
4 locks held by syz.4.5212/19229:
#0: ffffffff8ea9b7f0 (file_rwsem){++++}-{0:0}, at: __break_lease+0x3b3/0x1820 fs/locks.c:1563
#1: ffff8880266f4858 (&ctx->flc_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
#1: ffff8880266f4858 (&ctx->flc_lock){+.+.}-{2:2}, at: __break_lease+0x3c0/0x1820 fs/locks.c:1564
#2: ffffffff8e938b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#2: ffffffff8e938b60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#2: ffffffff8e938b60 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x54/0x4f0 fs/fcntl.c:1150
#3: ffff88807f3b9750 (&new->fa_lock){...-}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1127 [inline]
#3: ffff88807f3b9750 (&new->fa_lock){...-}-{2:2}, at: kill_fasync+0x199/0x4f0 fs/fcntl.c:1151
the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
-> (&dev->event_lock#2){..-.}-{2:2} {
IN-SOFTIRQ-W at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
input_inject_event+0xc5/0x340 drivers/input/input.c:423
kd_sound_helper+0x101/0x210 drivers/tty/vt/keyboard.c:256
input_handler_for_each_handle+0x105/0x1d0 drivers/input/input.c:2676
call_timer_fn+0x190/0x650 kernel/time/timer.c:1794
expire_timers kernel/time/timer.c:1845 [inline]
__run_timers kernel/time/timer.c:2419 [inline]
__run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430
run_timer_base kernel/time/timer.c:2439 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449
handle_softirqs+0x2c7/0x980 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1037
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
spin_unlock_irq include/linux/spinlock.h:401 [inline]
filemap_remove_folio+0x110/0x2e0 mm/filemap.c:265
truncate_inode_folio+0x5d/0x70 mm/truncate.c:178
shmem_undo_range+0x45d/0x1df0 mm/shmem.c:1019
shmem_truncate_range mm/shmem.c:1132 [inline]
shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1260
evict+0x4ea/0x9b0 fs/inode.c:731
__dentry_kill+0x20d/0x630 fs/dcache.c:615
dput+0x19f/0x2b0 fs/dcache.c:857
__fput+0x5d2/0x880 fs/file_table.c:439
task_work_run+0x251/0x310 kernel/task_work.c:228
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
INITIAL USE at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
input_inject_event+0xc5/0x340 drivers/input/input.c:423
kbd_led_trigger_activate+0xb8/0x100 drivers/tty/vt/keyboard.c:1036
led_trigger_set+0x584/0x9c0 drivers/leds/led-triggers.c:212
led_match_default_trigger drivers/leds/led-triggers.c:269 [inline]
led_trigger_set_default+0x229/0x260 drivers/leds/led-triggers.c:287
led_classdev_register_ext+0x6e6/0x8a0 drivers/leds/led-class.c:555
led_classdev_register include/linux/leds.h:273 [inline]
input_leds_connect+0x489/0x630 drivers/input/input-leds.c:145
input_attach_handler drivers/input/input.c:1027 [inline]
input_register_device+0xd3d/0x1110 drivers/input/input.c:2470
atkbd_connect+0x752/0xa00 drivers/input/keyboard/atkbd.c:1342
serio_connect_driver drivers/input/serio/serio.c:44 [inline]
serio_driver_probe+0x81/0xa0 drivers/input/serio/serio.c:775
really_probe+0x2ba/0xad0 drivers/base/dd.c:657
__driver_probe_device+0x1a2/0x390 drivers/base/dd.c:799
driver_probe_device+0x50/0x430 drivers/base/dd.c:829
__driver_attach+0x45f/0x710 drivers/base/dd.c:1215
bus_for_each_dev+0x23b/0x2b0 drivers/base/bus.c:368
serio_attach_driver drivers/input/serio/serio.c:804 [inline]
serio_handle_event+0x1c7/0x920 drivers/input/serio/serio.c:224
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
}
... key at: [<ffffffff9a71d6e0>] input_allocate_device.__key.5+0x0/0x20
-> (&new->fa_lock){...-}-{2:2} {
IN-SOFTIRQ-R at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1127 [inline]
kill_fasync+0x199/0x4f0 fs/fcntl.c:1151
sock_wake_async+0x147/0x170
sk_wake_async_rcu include/net/sock.h:2450 [inline]
sock_def_readable+0x3df/0x5b0 net/core/sock.c:3444
__udp_enqueue_schedule_skb+0x81a/0xb20 net/ipv4/udp.c:1566
__udpv6_queue_rcv_skb net/ipv6/udp.c:658 [inline]
udpv6_queue_rcv_one_skb+0xa22/0x18a0 net/ipv6/udp.c:770
udp6_unicast_rcv_skb+0x230/0x370 net/ipv6/udp.c:928
ip6_protocol_deliver_rcu+0xccf/0x1580 net/ipv6/ip6_input.c:436
ip6_input_finish+0x187/0x2d0 net/ipv6/ip6_input.c:481
NF_HOOK+0x3a6/0x450 include/linux/netfilter.h:314
NF_HOOK+0x3a6/0x450 include/linux/netfilter.h:314
__netif_receive_skb_one_core net/core/dev.c:5662 [inline]
__netif_receive_skb+0x1ea/0x650 net/core/dev.c:5775
process_backlog+0x662/0x15b0 net/core/dev.c:6107
__napi_poll+0xcd/0x490 net/core/dev.c:6771
napi_poll net/core/dev.c:6840 [inline]
net_rx_action+0x89b/0x1240 net/core/dev.c:6962
handle_softirqs+0x2c7/0x980 kernel/softirq.c:554
do_softirq+0x11b/0x1e0 kernel/softirq.c:455
__local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline]
__dev_queue_xmit+0x1764/0x3e80 net/core/dev.c:4451
dev_queue_xmit include/linux/netdevice.h:3094 [inline]
neigh_hh_output include/net/neighbour.h:526 [inline]
neigh_output include/net/neighbour.h:540 [inline]
ip6_finish_output2+0xfc9/0x1730 net/ipv6/ip6_output.c:141
ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:226
ip6_send_skb+0x1b1/0x3b0 net/ipv6/ip6_output.c:1968
udp_v6_send_skb+0xbf5/0x1870 net/ipv6/udp.c:1292
udpv6_sendmsg+0x23b6/0x3270 net/ipv6/udp.c:1588
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0xef/0x270 net/socket.c:745
__sys_sendto+0x398/0x4f0 net/socket.c:2210
__do_sys_sendto net/socket.c:2222 [inline]
__se_sys_sendto net/socket.c:2218 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2218
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
INITIAL USE at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:326
fasync_remove_entry+0xff/0x1d0 fs/fcntl.c:1004
__fput+0x71d/0x880 fs/file_table.c:428
task_work_run+0x251/0x310 kernel/task_work.c:228
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
INITIAL READ USE at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1127 [inline]
kill_fasync+0x199/0x4f0 fs/fcntl.c:1151
mousedev_notify_readers+0x719/0xc80 drivers/input/mousedev.c:309
mousedev_event+0x5d9/0x1390 drivers/input/mousedev.c:394
input_handler_events_default+0x109/0x1c0 drivers/input/input.c:2549
input_pass_values+0x288/0x860 drivers/input/input.c:126
input_event_dispose+0x30f/0x600 drivers/input/input.c:341
input_handle_event+0xa71/0xbe0 drivers/input/input.c:369
input_inject_event+0x22f/0x340 drivers/input/input.c:428
evdev_write+0x66f/0x7c0 drivers/input/evdev.c:521
vfs_write+0x29e/0xc90 fs/read_write.c:681
ksys_write+0x1a0/0x2c0 fs/read_write.c:736
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
}
... key at: [<ffffffff9a40dcc0>] fasync_insert_entry.__key+0x0/0x20
... acquired at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1127 [inline]
kill_fasync+0x199/0x4f0 fs/fcntl.c:1151
mousedev_notify_readers+0x719/0xc80 drivers/input/mousedev.c:309
mousedev_event+0x5d9/0x1390 drivers/input/mousedev.c:394
input_handler_events_default+0x109/0x1c0 drivers/input/input.c:2549
input_pass_values+0x288/0x860 drivers/input/input.c:126
input_event_dispose+0x30f/0x600 drivers/input/input.c:341
input_handle_event+0xa71/0xbe0 drivers/input/input.c:369
input_inject_event+0x22f/0x340 drivers/input/input.c:428
evdev_write+0x66f/0x7c0 drivers/input/evdev.c:521
vfs_write+0x29e/0xc90 fs/read_write.c:681
ksys_write+0x1a0/0x2c0 fs/read_write.c:736
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
the dependencies between the lock to be acquired
and SOFTIRQ-irq-unsafe lock:
-> (tasklist_lock){.+.+}-{2:2} {
HARDIRQ-ON-R at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
__do_wait+0x12d/0x850 kernel/exit.c:1591
do_wait+0x1e9/0x560 kernel/exit.c:1635
kernel_wait+0xe9/0x240 kernel/exit.c:1811
call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
call_usermodehelper_exec_work+0xbd/0x230 kernel/umh.c:164
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
SOFTIRQ-ON-R at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
__do_wait+0x12d/0x850 kernel/exit.c:1591
do_wait+0x1e9/0x560 kernel/exit.c:1635
kernel_wait+0xe9/0x240 kernel/exit.c:1811
call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
call_usermodehelper_exec_work+0xbd/0x230 kernel/umh.c:164
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
INITIAL USE at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:326
copy_process+0x224b/0x3d80 kernel/fork.c:2499
kernel_clone+0x226/0x8f0 kernel/fork.c:2780
user_mode_thread+0x132/0x1a0 kernel/fork.c:2858
rest_init+0x23/0x300 init/main.c:712
start_kernel+0x47f/0x500 init/main.c:1105
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147
INITIAL READ USE at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
__do_wait+0x12d/0x850 kernel/exit.c:1591
do_wait+0x1e9/0x560 kernel/exit.c:1635
kernel_wait+0xe9/0x240 kernel/exit.c:1811
call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
call_usermodehelper_exec_work+0xbd/0x230 kernel/umh.c:164
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
}
... key at: [<ffffffff8e60a058>] tasklist_lock+0x18/0x40
... acquired at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
send_sigio+0x108/0x390 fs/fcntl.c:924
dnotify_handle_event+0x157/0x460 fs/notify/dnotify/dnotify.c:114
fsnotify_handle_event fs/notify/fsnotify.c:347 [inline]
send_to_group fs/notify/fsnotify.c:395 [inline]
fsnotify+0x18ab/0x1f70 fs/notify/fsnotify.c:604
fsnotify_parent include/linux/fsnotify.h:99 [inline]
fsnotify_file include/linux/fsnotify.h:131 [inline]
fsnotify_access include/linux/fsnotify.h:380 [inline]
vfs_readv+0x921/0xa80 fs/read_write.c:1030
do_preadv fs/read_write.c:1142 [inline]
__do_sys_preadv fs/read_write.c:1192 [inline]
__se_sys_preadv fs/read_write.c:1187 [inline]
__x64_sys_preadv+0x1c7/0x2d0 fs/read_write.c:1187
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> (&f_owner->lock){....}-{2:2} {
INITIAL USE at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:326
__f_setown+0x6b/0x380 fs/fcntl.c:137
fcntl_dirnotify+0x459/0x5b0 fs/notify/dnotify/dnotify.c:372
do_fcntl+0x7e2/0x1a60 fs/fcntl.c:534
__do_sys_fcntl fs/fcntl.c:586 [inline]
__se_sys_fcntl+0xd2/0x1e0 fs/fcntl.c:571
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
INITIAL READ USE at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236
send_sigio+0x37/0x390 fs/fcntl.c:910
dnotify_handle_event+0x157/0x460 fs/notify/dnotify/dnotify.c:114
fsnotify_handle_event fs/notify/fsnotify.c:324 [inline]
send_to_group fs/notify/fsnotify.c:395 [inline]
fsnotify+0x1738/0x1f70 fs/notify/fsnotify.c:604
__fsnotify_parent+0x4f5/0x5e0 fs/notify/fsnotify.c:261
notify_change+0xc0c/0xe90 fs/attr.c:508
vfs_utimes+0x4b5/0x770 fs/utimes.c:66
do_utimes_fd fs/utimes.c:120 [inline]
do_utimes+0x162/0x270 fs/utimes.c:144
__do_sys_utimensat fs/utimes.c:164 [inline]
__se_sys_utimensat fs/utimes.c:148 [inline]
__x64_sys_utimensat+0x14f/0x250 fs/utimes.c:148
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
}
... key at: [<ffffffff9a40dca0>] file_f_owner_allocate.__key+0x0/0x20
... acquired at:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236
send_sigio+0x37/0x390 fs/fcntl.c:910
kill_fasync_rcu fs/fcntl.c:1136 [inline]
kill_fasync+0x256/0x4f0 fs/fcntl.c:1151
lease_break_callback+0x26/0x30 fs/locks.c:558
__break_lease+0x6d7/0x1820 fs/locks.c:1592
break_lease include/linux/filelock.h:436 [inline]
do_dentry_open+0x8d4/0x1460 fs/open.c:949
vfs_open+0x3e/0x330 fs/open.c:1088
do_open fs/namei.c:3774 [inline]
path_openat+0x2c84/0x3590 fs/namei.c:3933
do_filp_open+0x235/0x490 fs/namei.c:3960
do_sys_openat2+0x13e/0x1d0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1434
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
stack backtrace:
CPU: 1 UID: 0 PID: 19229 Comm: syz.4.5212 Not tainted 6.11.0-syzkaller-05591-g2a17bb8c204f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
print_bad_irq_dependency kernel/locking/lockdep.c:2644 [inline]
check_irq_usage kernel/locking/lockdep.c:2885 [inline]
check_prev_add kernel/locking/lockdep.c:3162 [inline]
check_prevs_add kernel/locking/lockdep.c:3277 [inline]
validate_chain+0x4ebd/0x5920 kernel/locking/lockdep.c:3901
__lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5199
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236
send_sigio+0x37/0x390 fs/fcntl.c:910
kill_fasync_rcu fs/fcntl.c:1136 [inline]
kill_fasync+0x256/0x4f0 fs/fcntl.c:1151
lease_break_callback+0x26/0x30 fs/locks.c:558
__break_lease+0x6d7/0x1820 fs/locks.c:1592
break_lease include/linux/filelock.h:436 [inline]
do_dentry_open+0x8d4/0x1460 fs/open.c:949
vfs_open+0x3e/0x330 fs/open.c:1088
do_open fs/namei.c:3774 [inline]
path_openat+0x2c84/0x3590 fs/namei.c:3933
do_filp_open+0x235/0x490 fs/namei.c:3960
do_sys_openat2+0x13e/0x1d0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1434
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fec1c77def9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fec1d50f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fec1c935f80 RCX: 00007fec1c77def9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000540
RBP: 00007fec1c7f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fec1c935f80 R15: 00007fffa852a548
</TASK>
---
This report is generated by a bot. It may contain errors.
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