possible deadlock in __ata_sff_interrupt

From: Wei Chen
Date: Tue Dec 13 2022 - 10:10:35 EST

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Dear Linux Developer,

Recently, when using our tool to fuzz kernel, the following crash was triggered.

HEAD commit: 094226ad94f4 Linux v6.1-rc5
git tree: upstream
compiler: clang 12.0.1
console output:
https://drive.google.com/file/d/1QZttkbuLed4wp6U32UR6TpxfY_HHCIqQ/view?usp=share_link
kernel config: https://drive.google.com/file/d/1TdPsg_5Zon8S2hEFpLBWjb8Tnd2KA5WJ/view?usp=share_link

Unfortunately, I didn't have a reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: Wei Chen <harperchen1110@xxxxxxxxx>

=====================================================
WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected
6.1.0-rc5 #40 Not tainted
-----------------------------------------------------
syz-executor.0/27911 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff888076cc4f30 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu
fs/fcntl.c:996 [inline]
ffff888076cc4f30 (&new->fa_lock){....}-{2:2}, at:
kill_fasync+0x13b/0x430 fs/fcntl.c:1017

and this task is already holding:
ffff8880144dec18 (&host->lock){-.-.}-{2:2}, at:
ata_scsi_queuecmd+0x7a/0x130 drivers/ata/libata-scsi.c:4048
which would create a new lock dependency:
(&host->lock){-.-.}-{2:2} -> (&new->fa_lock){....}-{2:2}

but this new dependency connects a HARDIRQ-irq-safe lock:
(&host->lock){-.-.}-{2:2}

... which became HARDIRQ-irq-safe at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xb3/0x100 kernel/locking/spinlock.c:162
__ata_sff_interrupt+0x23/0x710 drivers/ata/libata-sff.c:1540
__handle_irq_event_percpu+0x1f7/0x620 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0x83/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x245/0xbe0 kernel/irq/chip.c:819
generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
handle_irq arch/x86/kernel/irq.c:231 [inline]
__common_interrupt+0xce/0x1e0 arch/x86/kernel/irq.c:250
common_interrupt+0x9f/0xc0 arch/x86/kernel/irq.c:240
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:640
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289
worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

to a HARDIRQ-irq-unsafe lock:
(tasklist_lock){.+.+}-{2:2}

... which became HARDIRQ-irq-unsafe at:
...
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
do_wait+0x224/0x9d0 kernel/exit.c:1533
kernel_wait+0xe4/0x230 kernel/exit.c:1723
call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:167
process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289
worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

other info that might help us debug this:

Chain exists of:
&host->lock --> &new->fa_lock --> tasklist_lock

Possible interrupt unsafe locking scenario:

CPU0 CPU1
---- ----
lock(tasklist_lock);
local_irq_disable();
lock(&host->lock);
lock(&new->fa_lock);
<Interrupt>
lock(&host->lock);

*** DEADLOCK ***

3 locks held by syz-executor.0/27911:
#0: ffffffff8cd20b60 (rcu_read_lock){....}-{1:2}, at:
rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:304
#1: ffff8880144dec18 (&host->lock){-.-.}-{2:2}, at:
ata_scsi_queuecmd+0x7a/0x130 drivers/ata/libata-scsi.c:4048
#2: ffffffff8cd20b60 (rcu_read_lock){....}-{1:2}, at:
rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:303

the dependencies between HARDIRQ-irq-safe lock and the holding lock:
-> (&host->lock){-.-.}-{2:2} {
IN-HARDIRQ-W at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_spin_lock_irqsave
include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xb3/0x100
kernel/locking/spinlock.c:162
__ata_sff_interrupt+0x23/0x710 drivers/ata/libata-sff.c:1540
__handle_irq_event_percpu+0x1f7/0x620
kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0x83/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x245/0xbe0 kernel/irq/chip.c:819
generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
handle_irq arch/x86/kernel/irq.c:231 [inline]
__common_interrupt+0xce/0x1e0 arch/x86/kernel/irq.c:250
common_interrupt+0x9f/0xc0 arch/x86/kernel/irq.c:240
asm_common_interrupt+0x22/0x40
arch/x86/include/asm/idtentry.h:640
__raw_spin_unlock_irq
include/linux/spinlock_api_smp.h:160 [inline]
_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289
worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
IN-SOFTIRQ-W at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_spin_lock_irqsave
include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xb3/0x100
kernel/locking/spinlock.c:162
__ata_sff_interrupt+0x23/0x710 drivers/ata/libata-sff.c:1540
__handle_irq_event_percpu+0x1f7/0x620
kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0x83/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x245/0xbe0 kernel/irq/chip.c:819
generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
handle_irq arch/x86/kernel/irq.c:231 [inline]
__common_interrupt+0xce/0x1e0 arch/x86/kernel/irq.c:250
common_interrupt+0x4a/0xc0 arch/x86/kernel/irq.c:240
asm_common_interrupt+0x22/0x40
arch/x86/include/asm/idtentry.h:640
__raw_spin_unlock_irq
include/linux/spinlock_api_smp.h:160 [inline]
_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
__run_timers+0x922/0x970 kernel/time/timer.c:1792
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803
__do_softirq+0x277/0x73a kernel/softirq.c:571
__irq_exit_rcu+0xcf/0x150 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x91/0xb0
arch/x86/kernel/apic/apic.c:1107
asm_sysvec_apic_timer_interrupt+0x16/0x20
arch/x86/include/asm/idtentry.h:649
__raw_spin_unlock_irqrestore
include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0xbc/0x120
kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:405 [inline]
ata_scsi_queuecmd+0xc6/0x130 drivers/ata/libata-scsi.c:4058
scsi_dispatch_cmd drivers/scsi/scsi_lib.c:1524 [inline]
scsi_queue_rq+0x1ea6/0x2ec0 drivers/scsi/scsi_lib.c:1760
blk_mq_dispatch_rq_list+0x104f/0x2ca0 block/blk-mq.c:1992
__blk_mq_do_dispatch_sched block/blk-mq-sched.c:173 [inline]
blk_mq_do_dispatch_sched+0x820/0xe60
block/blk-mq-sched.c:187
__blk_mq_sched_dispatch_requests+0x39b/0x490
blk_mq_sched_dispatch_requests+0xef/0x160
block/blk-mq-sched.c:339
__blk_mq_run_hw_queue+0x1cf/0x260 block/blk-mq.c:2110
process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289
worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
INITIAL USE at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_spin_lock_irqsave
include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xb3/0x100
kernel/locking/spinlock.c:162
ata_dev_init drivers/ata/libata-core.c:5202 [inline]
ata_link_init+0x236/0x890 drivers/ata/libata-core.c:5247
ata_port_alloc+0x3ce/0x470 drivers/ata/libata-core.c:5322
ata_host_alloc+0x198/0x2c0 drivers/ata/libata-core.c:5433
ata_host_alloc_pinfo+0x27/0x430
drivers/ata/libata-core.c:5476
ata_pci_sff_prepare_host+0x40/0xe0
drivers/ata/libata-sff.c:2305
ata_pci_bmdma_prepare_host+0x20/0x70
drivers/ata/libata-sff.c:3210
piix_init_one+0x628/0x1ed0 drivers/ata/ata_piix.c:1704
local_pci_probe drivers/pci/pci-driver.c:324 [inline]
pci_call_probe drivers/pci/pci-driver.c:392 [inline]
__pci_device_probe drivers/pci/pci-driver.c:417 [inline]
pci_device_probe+0x4fe/0xa60 drivers/pci/pci-driver.c:460
call_driver_probe+0x96/0x250
really_probe+0x237/0xaf0 drivers/base/dd.c:639
__driver_probe_device+0x1f8/0x3e0 drivers/base/dd.c:778
driver_probe_device+0x50/0x240 drivers/base/dd.c:808
__driver_attach+0x2b6/0x5b0 drivers/base/dd.c:1190
bus_for_each_dev+0x168/0x1d0 drivers/base/bus.c:301
bus_add_driver+0x32f/0x600 drivers/base/bus.c:618
driver_register+0x2e9/0x3e0 drivers/base/driver.c:246
piix_init+0x1b/0x41 drivers/ata/ata_piix.c:1774
do_one_initcall+0x1a7/0x400 init/main.c:1303
do_initcall_level+0x168/0x218 init/main.c:1376
do_initcalls+0x4b/0x8c init/main.c:1392
kernel_init_freeable+0x428/0x5d8 init/main.c:1631
kernel_init+0x19/0x2b0 init/main.c:1519
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
}
... key at: [<ffffffff9114fc40>] ata_host_alloc.__key+0x0/0x40

the dependencies between the lock to be acquired
and HARDIRQ-irq-unsafe lock:
-> (tasklist_lock){.+.+}-{2:2} {
HARDIRQ-ON-R at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_read_lock
include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
do_wait+0x224/0x9d0 kernel/exit.c:1533
kernel_wait+0xe4/0x230 kernel/exit.c:1723
call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
call_usermodehelper_exec_work+0xb4/0x220
kernel/umh.c:167
process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289
worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
SOFTIRQ-ON-R at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_read_lock
include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
do_wait+0x224/0x9d0 kernel/exit.c:1533
kernel_wait+0xe4/0x230 kernel/exit.c:1723
call_usermodehelper_exec_sync kernel/umh.c:140 [inline]
call_usermodehelper_exec_work+0xb4/0x220
kernel/umh.c:167
process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289
worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
INITIAL USE at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_write_lock_irq
include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xae/0xf0
kernel/locking/spinlock.c:326
copy_process+0x37cf/0x6200 kernel/fork.c:2387
kernel_clone+0x212/0x610 kernel/fork.c:2671
user_mode_thread+0x12d/0x190 kernel/fork.c:2747
rest_init+0x21/0x270 init/main.c:694
start_kernel+0x0/0x540 init/main.c:890
start_kernel+0x49a/0x540 init/main.c:1145
secondary_startup_64_no_verify+0xcf/0xdb
INITIAL READ USE at:
lock_acquire+0x17f/0x430
kernel/locking/lockdep.c:5668
__raw_read_lock
include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40
kernel/locking/spinlock.c:228
do_wait+0x224/0x9d0 kernel/exit.c:1533
kernel_wait+0xe4/0x230 kernel/exit.c:1723
call_usermodehelper_exec_sync
kernel/umh.c:140 [inline]
call_usermodehelper_exec_work+0xb4/0x220
kernel/umh.c:167
process_one_work+0x83c/0x11a0
kernel/workqueue.c:2289
worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
arch/x86/entry/entry_64.S:306
}
... key at: [<ffffffff8ca0a058>] tasklist_lock+0x18/0x40
... acquired at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
send_sigio+0xbe/0x300 fs/fcntl.c:792
kill_fasync_rcu fs/fcntl.c:1003 [inline]
kill_fasync+0x1e4/0x430 fs/fcntl.c:1017
__receive_buf drivers/tty/n_tty.c:1629 [inline]
n_tty_receive_buf_common+0xaac/0x1370 drivers/tty/n_tty.c:1711
tiocsti drivers/tty/tty_io.c:2286 [inline]
tty_ioctl+0xda7/0x1710 drivers/tty/tty_io.c:2685
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> (&f->f_owner.lock){....}-{2:2} {
INITIAL USE at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_write_lock_irq
include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xae/0xf0 kernel/locking/spinlock.c:326
f_modown+0x38/0x340 fs/fcntl.c:91
__tty_fasync drivers/tty/tty_io.c:2237 [inline]
tty_fasync+0x24a/0x340 drivers/tty/tty_io.c:2252
setfl fs/fcntl.c:73 [inline]
do_fcntl+0xe6c/0x1350 fs/fcntl.c:340
__do_sys_fcntl fs/fcntl.c:454 [inline]
__se_sys_fcntl+0xd5/0x1b0 fs/fcntl.c:439
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
INITIAL READ USE at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_read_lock_irq
include/linux/rwlock_api_smp.h:169 [inline]
_raw_read_lock_irq+0xb6/0x100
kernel/locking/spinlock.c:244
f_getown_ex fs/fcntl.c:212 [inline]
do_fcntl+0x1a5/0x1350 fs/fcntl.c:380
__do_sys_fcntl fs/fcntl.c:454 [inline]
__se_sys_fcntl+0xd5/0x1b0 fs/fcntl.c:439
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
}
... key at: [<ffffffff90e590c0>] __alloc_file.__key+0x0/0x10
... acquired at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xbb/0x100 kernel/locking/spinlock.c:236
send_sigio+0x2f/0x300 fs/fcntl.c:778
kill_fasync_rcu fs/fcntl.c:1003 [inline]
kill_fasync+0x1e4/0x430 fs/fcntl.c:1017
sock_wake_async+0x133/0x150
rcu_read_unlock include/linux/rcupdate.h:767 [inline]
sk_wake_async+0x12e/0x200 include/net/sock.h:2525
sock_def_error_report+0x154/0x200 net/core/sock.c:3264
smc_fback_forward_wakeup+0x1b6/0x500 net/smc/af_smc.c:786
smc_fback_error_report+0x90/0xb0 net/smc/af_smc.c:838
sk_error_report+0x3b/0xb0 net/core/sock.c:345
tcp_validate_incoming+0x1509/0x1fc0 net/ipv4/tcp_input.c:5805
tcp_rcv_state_process+0x513/0x2610 net/ipv4/tcp_input.c:6520
tcp_v4_do_rcv+0x691/0xa10 net/ipv4/tcp_ipv4.c:1704
sk_backlog_rcv include/net/sock.h:1109 [inline]
__release_sock+0x106/0x3a0 net/core/sock.c:2906
release_sock+0x5d/0x1c0 net/core/sock.c:3462
sk_stream_wait_memory+0x6d9/0xe20 net/core/stream.c:145
tcp_sendmsg_locked+0x1888/0x4540 net/ipv4/tcp.c:1445
tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1483
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg net/socket.c:734 [inline]
____sys_sendmsg+0x558/0x8a0 net/socket.c:2482
___sys_sendmsg net/socket.c:2536 [inline]
__sys_sendmmsg+0x360/0x6c0 net/socket.c:2622
__do_sys_sendmmsg net/socket.c:2651 [inline]
__se_sys_sendmmsg net/socket.c:2648 [inline]
__x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2648
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> (&new->fa_lock){....}-{2:2} {
INITIAL USE at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_write_lock_irq
include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xae/0xf0 kernel/locking/spinlock.c:326
fasync_remove_entry+0xff/0x1d0 fs/fcntl.c:873
sock_fasync+0x86/0xf0 net/socket.c:1390
__fput+0x751/0x8c0 fs/file_table.c:317
task_work_run+0x243/0x300 kernel/task_work.c:179
resume_user_mode_work
include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x1f2/0x210
kernel/entry/common.c:203
__syscall_exit_to_user_mode_work
kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296
do_syscall_64+0x4c/0x90 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
INITIAL READ USE at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_read_lock_irqsave
include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xbb/0x100
kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:996 [inline]
kill_fasync+0x13b/0x430 fs/fcntl.c:1017
sock_wake_async+0x133/0x150
rcu_read_unlock include/linux/rcupdate.h:767 [inline]
sk_wake_async+0x12e/0x200 include/net/sock.h:2525
sock_def_error_report+0x154/0x200 net/core/sock.c:3264
smc_fback_forward_wakeup+0x1b6/0x500
net/smc/af_smc.c:786
smc_fback_error_report+0x90/0xb0 net/smc/af_smc.c:838
sk_error_report+0x3b/0xb0 net/core/sock.c:345
tcp_validate_incoming+0x1509/0x1fc0
net/ipv4/tcp_input.c:5805
tcp_rcv_state_process+0x513/0x2610
net/ipv4/tcp_input.c:6520
tcp_v4_do_rcv+0x691/0xa10 net/ipv4/tcp_ipv4.c:1704
sk_backlog_rcv include/net/sock.h:1109 [inline]
__release_sock+0x106/0x3a0 net/core/sock.c:2906
release_sock+0x5d/0x1c0 net/core/sock.c:3462
sk_stream_wait_memory+0x6d9/0xe20 net/core/stream.c:145
tcp_sendmsg_locked+0x1888/0x4540 net/ipv4/tcp.c:1445
tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1483
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg net/socket.c:734 [inline]
____sys_sendmsg+0x558/0x8a0 net/socket.c:2482
___sys_sendmsg net/socket.c:2536 [inline]
__sys_sendmmsg+0x360/0x6c0 net/socket.c:2622
__do_sys_sendmmsg net/socket.c:2651 [inline]
__se_sys_sendmmsg net/socket.c:2648 [inline]
__x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2648
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
}
... key at: [<ffffffff90e59f80>] fasync_insert_entry.__key+0x0/0x40
... acquired at:
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xbb/0x100 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:996 [inline]
kill_fasync+0x13b/0x430 fs/fcntl.c:1017
sg_rq_end_io+0x604/0xf50 drivers/scsi/sg.c:1403
__blk_mq_end_request+0x2c7/0x380 block/blk-mq.c:1011
scsi_end_request+0x4ed/0x9c0 drivers/scsi/scsi_lib.c:576
scsi_io_completion+0xc25/0x27a0 drivers/scsi/scsi_lib.c:985
ata_scsi_simulate+0x336e/0x3dd0 drivers/ata/libata-scsi.c:4190
__ata_scsi_queuecmd+0x20b/0x1020 drivers/ata/libata-scsi.c:4009
ata_scsi_queuecmd+0xa0/0x130 drivers/ata/libata-scsi.c:4052
scsi_dispatch_cmd drivers/scsi/scsi_lib.c:1524 [inline]
scsi_queue_rq+0x1ea6/0x2ec0 drivers/scsi/scsi_lib.c:1760
blk_mq_dispatch_rq_list+0x104f/0x2ca0 block/blk-mq.c:1992
__blk_mq_sched_dispatch_requests+0x382/0x490 block/blk-mq-sched.c:306
blk_mq_sched_dispatch_requests+0xef/0x160 block/blk-mq-sched.c:339
__blk_mq_run_hw_queue+0x1cf/0x260 block/blk-mq.c:2110
blk_mq_sched_insert_request+0x1e2/0x430 block/blk-mq-sched.c:458
blk_execute_rq_nowait+0x2e8/0x3b0 block/blk-mq.c:1305
sg_common_write+0x8c0/0x1970 drivers/scsi/sg.c:832
sg_new_write+0x61f/0x860 drivers/scsi/sg.c:770
sg_ioctl_common drivers/scsi/sg.c:935 [inline]
sg_ioctl+0x1c51/0x2be0 drivers/scsi/sg.c:1159
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

stack backtrace:
CPU: 0 PID: 27911 Comm: syz-executor.0 Not tainted 6.1.0-rc5 #40
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.13.0-1ubuntu1.1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
print_bad_irq_dependency kernel/locking/lockdep.c:2611 [inline]
check_irq_usage kernel/locking/lockdep.c:2850 [inline]
check_prev_add kernel/locking/lockdep.c:3101 [inline]
check_prevs_add+0x4e5f/0x5b70 kernel/locking/lockdep.c:3216
validate_chain kernel/locking/lockdep.c:3831 [inline]
__lock_acquire+0x4411/0x6070 kernel/locking/lockdep.c:5055
lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xbb/0x100 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:996 [inline]
kill_fasync+0x13b/0x430 fs/fcntl.c:1017
sg_rq_end_io+0x604/0xf50 drivers/scsi/sg.c:1403
__blk_mq_end_request+0x2c7/0x380 block/blk-mq.c:1011
scsi_end_request+0x4ed/0x9c0 drivers/scsi/scsi_lib.c:576
scsi_io_completion+0xc25/0x27a0 drivers/scsi/scsi_lib.c:985
ata_scsi_simulate+0x336e/0x3dd0 drivers/ata/libata-scsi.c:4190
__ata_scsi_queuecmd+0x20b/0x1020 drivers/ata/libata-scsi.c:4009
ata_scsi_queuecmd+0xa0/0x130 drivers/ata/libata-scsi.c:4052
scsi_dispatch_cmd drivers/scsi/scsi_lib.c:1524 [inline]
scsi_queue_rq+0x1ea6/0x2ec0 drivers/scsi/scsi_lib.c:1760
blk_mq_dispatch_rq_list+0x104f/0x2ca0 block/blk-mq.c:1992
__blk_mq_sched_dispatch_requests+0x382/0x490 block/blk-mq-sched.c:306
blk_mq_sched_dispatch_requests+0xef/0x160 block/blk-mq-sched.c:339
__blk_mq_run_hw_queue+0x1cf/0x260 block/blk-mq.c:2110
blk_mq_sched_insert_request+0x1e2/0x430 block/blk-mq-sched.c:458
blk_execute_rq_nowait+0x2e8/0x3b0 block/blk-mq.c:1305
sg_common_write+0x8c0/0x1970 drivers/scsi/sg.c:832
sg_new_write+0x61f/0x860 drivers/scsi/sg.c:770
sg_ioctl_common drivers/scsi/sg.c:935 [inline]
sg_ioctl+0x1c51/0x2be0 drivers/scsi/sg.c:1159
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f153dc8bded
Code: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f153ede2c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f153ddabf80 RCX: 00007f153dc8bded
RDX: 0000000020000440 RSI: 0000000000002285 RDI: 0000000000000006
RBP: 00007f153dcf8ce0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f153ddabf80
R13: 00007ffc72e5108f R14: 00007ffc72e51230 R15: 00007f153ede2dc0
</TASK>

Best,
Wei

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