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Message-ID: <68322e45.a70a0220.253bc2.0076.GAE@google.com>
Date: Sat, 24 May 2025 13:38:29 -0700
From: syzbot <syzbot+79c403850e6816dc39cf@...kaller.appspotmail.com>
To: alex.aring@...il.com, amir73il@...il.com, bfields@...ldses.org,
brauner@...nel.org, changlianzhi@...ontech.com, chuck.lever@...cle.com,
dakr@...nel.org, dmitry.torokhov@...il.com, gregkh@...uxfoundation.org,
jack@...e.cz, jlayton@...nel.org, linux-fsdevel@...r.kernel.org,
linux-kernel@...r.kernel.org, rafael@...nel.org,
syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: Re: [syzbot] [fs?] possible deadlock in input_inject_event
syzbot has found a reproducer for the following issue on:
HEAD commit: 4856ebd99715 Merge tag 'drm-fixes-2025-05-24' of https://g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11879ad4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=9fd1c9848687d742
dashboard link: https://syzkaller.appspot.com/bug?extid=79c403850e6816dc39cf
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=126515f4580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=177dc8e8580000
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-4856ebd9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/01d4bdc03dd1/vmlinux-4856ebd9.xz
kernel image: https://storage.googleapis.com/syzbot-assets/be7030a85b77/bzImage-4856ebd9.xz
The issue was bisected to:
commit fb09d0ac07725b442b32dbf53f0ab0bea54804e9
Author: lianzhi chang <changlianzhi@...ontech.com>
Date: Wed Dec 15 12:51:25 2021 +0000
tty: Fix the keyboard led light display problem
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12ad3cdf980000
final oops: https://syzkaller.appspot.com/x/report.txt?x=11ad3cdf980000
console output: https://syzkaller.appspot.com/x/log.txt?x=16ad3cdf980000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+79c403850e6816dc39cf@...kaller.appspotmail.com
Fixes: fb09d0ac0772 ("tty: Fix the keyboard led light display problem")
=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
6.15.0-rc7-syzkaller-00142-g4856ebd99715 #0 Not tainted
-----------------------------------------------------
syz-executor408/5394 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff8880345bc558 (&new->fa_lock){....}-{3:3}, at: kill_fasync_rcu fs/fcntl.c:1124 [inline]
ffff8880345bc558 (&new->fa_lock){....}-{3:3}, at: kill_fasync+0x199/0x4d0 fs/fcntl.c:1148
and this task is already holding:
ffff88804359a028 (&client->buffer_lock){....}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff88804359a028 (&client->buffer_lock){....}-{3:3}, at: evdev_pass_values+0xb9/0xbd0 drivers/input/evdev.c:261
which would create a new lock dependency:
(&client->buffer_lock){....}-{3:3} -> (&new->fa_lock){....}-{3:3}
but this new dependency connects a SOFTIRQ-irq-safe lock:
(&dev->event_lock#2){..-.}-{3:3}
... which became SOFTIRQ-irq-safe at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162
class_spinlock_irqsave_constructor include/linux/spinlock.h:585 [inline]
input_inject_event+0xab/0x320 drivers/input/input.c:418
led_trigger_event+0x138/0x210 drivers/leds/led-triggers.c:407
kbd_propagate_led_state drivers/tty/vt/keyboard.c:1080 [inline]
kbd_bh+0x1c6/0x2e0 drivers/tty/vt/keyboard.c:1269
tasklet_action_common+0x36c/0x580 kernel/softirq.c:829
handle_softirqs+0x286/0x870 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:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
__preempt_count_add arch/x86/include/asm/preempt.h:80 [inline]
rcu_is_watching+0x10/0xb0 kernel/rcu/tree.c:735
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x4b/0x3e0 kernel/locking/lockdep.c:5877
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4147 [inline]
slab_alloc_node mm/slub.c:4196 [inline]
kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4203
lsm_inode_alloc security/security.c:755 [inline]
security_inode_alloc+0x39/0x330 security/security.c:1697
inode_init_always_gfp+0x9ed/0xdc0 fs/inode.c:306
inode_init_always include/linux/fs.h:3226 [inline]
alloc_inode+0x82/0x1b0 fs/inode.c:353
new_inode+0x22/0x170 fs/inode.c:1145
debugfs_get_inode fs/debugfs/inode.c:72 [inline]
__debugfs_create_file+0x14d/0x4f0 fs/debugfs/inode.c:447
debugfs_create_file_unsafe+0x3a/0x50 fs/debugfs/inode.c:523
add_sta_files net/mac80211/debugfs_netdev.c:849 [inline]
add_files net/mac80211/debugfs_netdev.c:958 [inline]
ieee80211_debugfs_add_netdev net/mac80211/debugfs_netdev.c:1011 [inline]
ieee80211_debugfs_recreate_netdev+0xca1/0x1460 net/mac80211/debugfs_netdev.c:1035
ieee80211_if_add+0xc17/0x1390 net/mac80211/iface.c:2202
ieee80211_register_hw+0x350d/0x4120 net/mac80211/main.c:1606
mac80211_hwsim_new_radio+0x2f0e/0x5340 drivers/net/wireless/virtual/mac80211_hwsim.c:5559
hwsim_new_radio_nl+0xea4/0x1b10 drivers/net/wireless/virtual/mac80211_hwsim.c:6243
genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x21c/0x490 net/netlink/af_netlink.c:2534
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x758/0x8d0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg+0x219/0x270 net/socket.c:727
__sys_sendto+0x3bd/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
to a SOFTIRQ-irq-unsafe lock:
(tasklist_lock){.+.+}-{3:3}
... which became SOFTIRQ-irq-unsafe at:
...
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
__do_wait+0xde/0x740 kernel/exit.c:1662
do_wait+0x1f8/0x520 kernel/exit.c:1706
kernel_wait+0xab/0x170 kernel/exit.c:1882
call_usermodehelper_exec_sync kernel/umh.c:136 [inline]
call_usermodehelper_exec_work+0xbe/0x230 kernel/umh.c:163
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
other info that might help us debug this:
Chain exists of:
&dev->event_lock#2 --> &client->buffer_lock --> tasklist_lock
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(tasklist_lock);
local_irq_disable();
lock(&dev->event_lock#2);
lock(&client->buffer_lock);
<Interrupt>
lock(&dev->event_lock#2);
*** DEADLOCK ***
7 locks held by syz-executor408/5394:
#0: ffff8880363a6118 (&evdev->mutex){+.+.}-{4:4}, at: evdev_write+0x1a1/0x480 drivers/input/evdev.c:511
#1: ffff88801f34a230 (&dev->event_lock#2){..-.}-{3:3}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:585 [inline]
#1: ffff88801f34a230 (&dev->event_lock#2){..-.}-{3:3}, at: input_inject_event+0xab/0x320 drivers/input/input.c:418
#2: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#2: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#2: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
#2: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: input_inject_event+0xbc/0x320 drivers/input/input.c:419
#3: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#3: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#3: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
#3: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: input_pass_values+0x8d/0x890 drivers/input/input.c:118
#4: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#4: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#4: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: evdev_events+0x79/0x340 drivers/input/evdev.c:298
#5: ffff88804359a028 (&client->buffer_lock){....}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
#5: ffff88804359a028 (&client->buffer_lock){....}-{3:3}, at: evdev_pass_values+0xb9/0xbd0 drivers/input/evdev.c:261
#6: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#6: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#6: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: kill_fasync+0x53/0x4d0 fs/fcntl.c:1147
the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
-> (&dev->event_lock#2){..-.}-{3:3} {
IN-SOFTIRQ-W at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162
class_spinlock_irqsave_constructor include/linux/spinlock.h:585 [inline]
input_inject_event+0xab/0x320 drivers/input/input.c:418
led_trigger_event+0x138/0x210 drivers/leds/led-triggers.c:407
kbd_propagate_led_state drivers/tty/vt/keyboard.c:1080 [inline]
kbd_bh+0x1c6/0x2e0 drivers/tty/vt/keyboard.c:1269
tasklet_action_common+0x36c/0x580 kernel/softirq.c:829
handle_softirqs+0x286/0x870 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:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
__preempt_count_add arch/x86/include/asm/preempt.h:80 [inline]
rcu_is_watching+0x10/0xb0 kernel/rcu/tree.c:735
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x4b/0x3e0 kernel/locking/lockdep.c:5877
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4147 [inline]
slab_alloc_node mm/slub.c:4196 [inline]
kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4203
lsm_inode_alloc security/security.c:755 [inline]
security_inode_alloc+0x39/0x330 security/security.c:1697
inode_init_always_gfp+0x9ed/0xdc0 fs/inode.c:306
inode_init_always include/linux/fs.h:3226 [inline]
alloc_inode+0x82/0x1b0 fs/inode.c:353
new_inode+0x22/0x170 fs/inode.c:1145
debugfs_get_inode fs/debugfs/inode.c:72 [inline]
__debugfs_create_file+0x14d/0x4f0 fs/debugfs/inode.c:447
debugfs_create_file_unsafe+0x3a/0x50 fs/debugfs/inode.c:523
add_sta_files net/mac80211/debugfs_netdev.c:849 [inline]
add_files net/mac80211/debugfs_netdev.c:958 [inline]
ieee80211_debugfs_add_netdev net/mac80211/debugfs_netdev.c:1011 [inline]
ieee80211_debugfs_recreate_netdev+0xca1/0x1460 net/mac80211/debugfs_netdev.c:1035
ieee80211_if_add+0xc17/0x1390 net/mac80211/iface.c:2202
ieee80211_register_hw+0x350d/0x4120 net/mac80211/main.c:1606
mac80211_hwsim_new_radio+0x2f0e/0x5340 drivers/net/wireless/virtual/mac80211_hwsim.c:5559
hwsim_new_radio_nl+0xea4/0x1b10 drivers/net/wireless/virtual/mac80211_hwsim.c:6243
genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x21c/0x490 net/netlink/af_netlink.c:2534
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x758/0x8d0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg+0x219/0x270 net/socket.c:727
__sys_sendto+0x3bd/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
INITIAL USE at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162
class_spinlock_irqsave_constructor include/linux/spinlock.h:585 [inline]
input_inject_event+0xab/0x320 drivers/input/input.c:418
kbd_led_trigger_activate+0xbc/0x100 drivers/tty/vt/keyboard.c:1036
led_trigger_set+0x52d/0x950 drivers/leds/led-triggers.c:212
led_match_default_trigger drivers/leds/led-triggers.c:269 [inline]
led_trigger_set_default+0x215/0x250 drivers/leds/led-triggers.c:287
led_classdev_register_ext+0x73d/0x930 drivers/leds/led-class.c:566
led_classdev_register include/linux/leds.h:274 [inline]
input_leds_connect+0x517/0x790 drivers/input/input-leds.c:145
input_attach_handler drivers/input/input.c:993 [inline]
input_register_device+0xcee/0x10b0 drivers/input/input.c:2412
atkbd_connect+0x70e/0x9c0 drivers/input/keyboard/atkbd.c:1340
serio_connect_driver drivers/input/serio/serio.c:43 [inline]
serio_driver_probe+0x7f/0xa0 drivers/input/serio/serio.c:747
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26d/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__driver_attach+0x452/0x700 drivers/base/dd.c:1215
bus_for_each_dev+0x233/0x2b0 drivers/base/bus.c:370
serio_attach_driver drivers/input/serio/serio.c:776 [inline]
serio_handle_event+0x1a2/0x860 drivers/input/serio/serio.c:213
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
}
... key at: [<ffffffff99b915c0>] input_allocate_device.__key.5+0x0/0x20
-> (&client->buffer_lock){....}-{3:3} {
INITIAL USE at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__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]
evdev_pass_values+0xb9/0xbd0 drivers/input/evdev.c:261
evdev_events+0x1e6/0x340 drivers/input/evdev.c:306
input_pass_values+0x288/0x890 drivers/input/input.c:127
input_event_dispose+0x330/0x6b0 drivers/input/input.c:341
input_inject_event+0x1fe/0x320 drivers/input/input.c:423
evdev_write+0x2fc/0x480 drivers/input/evdev.c:528
vfs_write+0x27b/0xa90 fs/read_write.c:682
ksys_write+0x145/0x250 fs/read_write.c:736
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
}
... key at: [<ffffffff99b91860>] evdev_open.__key.25+0x0/0x20
... acquired at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__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]
evdev_pass_values+0xb9/0xbd0 drivers/input/evdev.c:261
evdev_events+0x1e6/0x340 drivers/input/evdev.c:306
input_pass_values+0x288/0x890 drivers/input/input.c:127
input_event_dispose+0x330/0x6b0 drivers/input/input.c:341
input_inject_event+0x1fe/0x320 drivers/input/input.c:423
evdev_write+0x2fc/0x480 drivers/input/evdev.c:528
vfs_write+0x27b/0xa90 fs/read_write.c:682
ksys_write+0x145/0x250 fs/read_write.c:736
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
the dependencies between the lock to be acquired
and SOFTIRQ-irq-unsafe lock:
-> (tasklist_lock){.+.+}-{3:3} {
HARDIRQ-ON-R at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
__do_wait+0xde/0x740 kernel/exit.c:1662
do_wait+0x1f8/0x520 kernel/exit.c:1706
kernel_wait+0xab/0x170 kernel/exit.c:1882
call_usermodehelper_exec_sync kernel/umh.c:136 [inline]
call_usermodehelper_exec_work+0xbe/0x230 kernel/umh.c:163
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
SOFTIRQ-ON-R at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
__do_wait+0xde/0x740 kernel/exit.c:1662
do_wait+0x1f8/0x520 kernel/exit.c:1706
kernel_wait+0xab/0x170 kernel/exit.c:1882
call_usermodehelper_exec_sync kernel/umh.c:136 [inline]
call_usermodehelper_exec_work+0xbe/0x230 kernel/umh.c:163
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INITIAL USE at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xa2/0xf0 kernel/locking/spinlock.c:326
copy_process+0x21d5/0x3b80 kernel/fork.c:2561
kernel_clone+0x21e/0x870 kernel/fork.c:2845
user_mode_thread+0xdd/0x140 kernel/fork.c:2923
rest_init+0x23/0x300 init/main.c:708
start_kernel+0x470/0x4f0 init/main.c:1099
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:513
x86_64_start_kernel+0x66/0x70 arch/x86/kernel/head64.c:494
common_startup_64+0x13e/0x147
INITIAL READ USE at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
__do_wait+0xde/0x740 kernel/exit.c:1662
do_wait+0x1f8/0x520 kernel/exit.c:1706
kernel_wait+0xab/0x170 kernel/exit.c:1882
call_usermodehelper_exec_sync kernel/umh.c:136 [inline]
call_usermodehelper_exec_work+0xbe/0x230 kernel/umh.c:163
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
}
... key at: [<ffffffff8dc0c058>] tasklist_lock+0x18/0x40
... acquired at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228
send_sigio+0x101/0x370 fs/fcntl.c:921
kill_fasync_rcu fs/fcntl.c:1133 [inline]
kill_fasync+0x24d/0x4d0 fs/fcntl.c:1148
lease_break_callback+0x26/0x30 fs/locks.c:558
__break_lease+0x6a5/0x1620 fs/locks.c:1592
vfs_truncate+0x428/0x520 fs/open.c:109
do_sys_truncate+0xdb/0x190 fs/open.c:138
__do_sys_truncate fs/open.c:150 [inline]
__se_sys_truncate fs/open.c:148 [inline]
__x64_sys_truncate+0x5b/0x70 fs/open.c:148
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> (&f_owner->lock){....}-{3:3} {
INITIAL USE at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xa2/0xf0 kernel/locking/spinlock.c:326
__f_setown+0x67/0x370 fs/fcntl.c:136
generic_add_lease fs/locks.c:1874 [inline]
generic_setlease+0xd5d/0x1240 fs/locks.c:1942
do_fcntl_add_lease fs/locks.c:2047 [inline]
fcntl_setlease+0x3a2/0x4c0 fs/locks.c:2069
do_fcntl+0x6a0/0x1910 fs/fcntl.c:536
__do_sys_fcntl fs/fcntl.c:591 [inline]
__se_sys_fcntl+0xc8/0x150 fs/fcntl.c:576
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
INITIAL READ USE at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_read_lock_irq include/linux/rwlock_api_smp.h:169 [inline]
_raw_read_lock_irq+0xaa/0xf0 kernel/locking/spinlock.c:244
f_getown+0x54/0x2a0 fs/fcntl.c:204
sock_ioctl+0x536/0x790 net/socket.c:1256
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
}
... key at: [<ffffffff99882d00>] file_f_owner_allocate.__key+0x0/0x20
... acquired at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xaf/0x100 kernel/locking/spinlock.c:236
send_sigio+0x38/0x370 fs/fcntl.c:907
kill_fasync_rcu fs/fcntl.c:1133 [inline]
kill_fasync+0x24d/0x4d0 fs/fcntl.c:1148
lease_break_callback+0x26/0x30 fs/locks.c:558
__break_lease+0x6a5/0x1620 fs/locks.c:1592
vfs_truncate+0x428/0x520 fs/open.c:109
do_sys_truncate+0xdb/0x190 fs/open.c:138
__do_sys_truncate fs/open.c:150 [inline]
__se_sys_truncate fs/open.c:148 [inline]
__x64_sys_truncate+0x5b/0x70 fs/open.c:148
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> (&new->fa_lock){....}-{3:3} {
INITIAL USE at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xa2/0xf0 kernel/locking/spinlock.c:326
fasync_remove_entry+0xf1/0x1c0 fs/fcntl.c:1001
lease_modify+0x1ca/0x3c0 fs/locks.c:1455
locks_remove_lease fs/locks.c:2675 [inline]
locks_remove_file+0x4bf/0xea0 fs/locks.c:2700
__fput+0x3ab/0xa70 fs/file_table.c:457
task_work_run+0x1d1/0x260 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x8d6/0x2550 kernel/exit.c:953
do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
get_signal+0x125e/0x1310 kernel/signal.c:3034
arch_do_signal_or_restart+0x95/0x780 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:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218
do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
INITIAL READ USE at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xaf/0x100 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1124 [inline]
kill_fasync+0x199/0x4d0 fs/fcntl.c:1148
lease_break_callback+0x26/0x30 fs/locks.c:558
__break_lease+0x6a5/0x1620 fs/locks.c:1592
vfs_truncate+0x428/0x520 fs/open.c:109
do_sys_truncate+0xdb/0x190 fs/open.c:138
__do_sys_truncate fs/open.c:150 [inline]
__se_sys_truncate fs/open.c:148 [inline]
__x64_sys_truncate+0x5b/0x70 fs/open.c:148
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
}
... key at: [<ffffffff99882d20>] fasync_insert_entry.__key+0x0/0x20
... acquired at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xaf/0x100 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1124 [inline]
kill_fasync+0x199/0x4d0 fs/fcntl.c:1148
__pass_event drivers/input/evdev.c:240 [inline]
evdev_pass_values+0x627/0xbd0 drivers/input/evdev.c:278
evdev_events+0x1e6/0x340 drivers/input/evdev.c:306
input_pass_values+0x288/0x890 drivers/input/input.c:127
input_event_dispose+0x330/0x6b0 drivers/input/input.c:341
input_inject_event+0x1fe/0x320 drivers/input/input.c:423
evdev_write+0x2fc/0x480 drivers/input/evdev.c:528
vfs_write+0x27b/0xa90 fs/read_write.c:682
ksys_write+0x145/0x250 fs/read_write.c:736
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
stack backtrace:
CPU: 0 UID: 0 PID: 5394 Comm: syz-executor408 Not tainted 6.15.0-rc7-syzkaller-00142-g4856ebd99715 #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_bad_irq_dependency kernel/locking/lockdep.c:2652 [inline]
check_irq_usage kernel/locking/lockdep.c:2893 [inline]
check_prev_add kernel/locking/lockdep.c:3170 [inline]
check_prevs_add kernel/locking/lockdep.c:3285 [inline]
validate_chain+0x1f05/0x2140 kernel/locking/lockdep.c:3909
__lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xaf/0x100 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1124 [inline]
kill_fasync+0x199/0x4d0 fs/fcntl.c:1148
__pass_event drivers/input/evdev.c:240 [inline]
evdev_pass_values+0x627/0xbd0 drivers/input/evdev.c:278
evdev_events+0x1e6/0x340 drivers/input/evdev.c:306
input_pass_values+0x288/0x890 drivers/input/input.c:127
input_event_dispose+0x330/0x6b0 drivers/input/input.c:341
input_inject_event+0x1fe/0x320 drivers/input/input.c:423
evdev_write+0x2fc/0x480 drivers/input/evdev.c:528
vfs_write+0x27b/0xa90 fs/read_write.c:682
ksys_write+0x145/0x250 fs/read_write.c:736
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f666844d4f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 1d 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f66683f9218 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f66684cd428 RCX: 00007f666844d4f9
RDX: 0000000000001068 RSI: 0000200000000040 RDI: 0000000000000008
RBP: 00007f66684cd420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f666849a548
R13: 0000200000000040 R14: 00002000000001c0 R15: 00002000000000c0
</TASK>
---
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#syz test: git://repo/address.git branch-or-commit-hash
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