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Message-ID: <CANikGpf3VaRCW+m48E+k7CDGKv89gwd12Q1=qM_uP3N=az-T7A@mail.gmail.com>
Date: Mon, 26 Aug 2024 13:46:15 -0700
From: Juefei Pu <juefei.pu@...il.ucr.edu>
To: dlemoal@...nel.org, cassel@...nel.org, linux-ide@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: BUG: possible deadlock in __ata_sff_interrupt
Hello,
We found the following issue using syzkaller on Linux v6.10.
A possible deadlock issue was discovered in function
`__ata_sff_interrupt` when it attempted to acquire lock `host->lock`.
Unfortunately, the syzkaller failed to generate a reproducer.
But at least we have the report:
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR
driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 CDB: opcode=0x98 98 61 1e 1d 47 a1 77 90 29 76
7f 40 b8 5e 03 63
=====================================================
WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected
6.10.0 #13 Not tainted
-----------------------------------------------------
syz.1.961/19801 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff88802d3a4018 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu
fs/fcntl.c:1028 [inline]
ffff88802d3a4018 (&new->fa_lock){....}-{2:2}, at:
kill_fasync+0x196/0x4d0 fs/fcntl.c:1049
and this task is already holding:
ffff88801ca06018 (&host->lock){-.-.}-{2:2}, at:
ata_scsi_queuecmd+0x8a/0x520 drivers/ata/libata-scsi.c:4197
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+0x1a9/0x400 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
__ata_sff_interrupt+0x2d/0x6a0 drivers/ata/libata-sff.c:1470
__handle_irq_event_percpu+0x1f2/0x5f0 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+0x257/0xc10 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
handle_irq arch/x86/kernel/irq.c:247 [inline]
call_irq_handler arch/x86/kernel/irq.c:259 [inline]
__common_interrupt+0x134/0x230 arch/x86/kernel/irq.c:285
common_interrupt+0x9f/0xc0 arch/x86/kernel/irq.c:278
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:693
__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 kernel/workqueue.c:3248 [inline]
process_scheduled_works+0x977/0x1410 kernel/workqueue.c:3329
worker_thread+0xaa0/0x1020 kernel/workqueue.c:3409
kthread+0x2eb/0x380 kernel/kthread.c:389
ret_from_fork+0x49/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:244
to a HARDIRQ-irq-unsafe lock:
(tasklist_lock){.+.+}-{2:2}
... which became HARDIRQ-irq-unsafe at:
...
lock_acquire+0x1a9/0x400 kernel/locking/lockdep.c:5754
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
__do_wait+0x126/0x870 kernel/exit.c:1585
do_wait+0x13e/0x310 kernel/exit.c:1629
kernel_wait+0xe4/0x230 kernel/exit.c:1805
call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:164
process_one_work kernel/workqueue.c:3248 [inline]
process_scheduled_works+0x977/0x1410 kernel/workqueue.c:3329
worker_thread+0xaa0/0x1020 kernel/workqueue.c:3409
kthread+0x2eb/0x380 kernel/kthread.c:389
ret_from_fork+0x49/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:244
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.1.961/19801:
#0: ffffffff8db32fe0 (rcu_read_lock){....}-{1:2}, at:
rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8db32fe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock
include/linux/rcupdate.h:781 [inline]
#0: ffffffff8db32fe0 (rcu_read_lock){....}-{1:2}, at:
blk_mq_run_hw_queue+0x442/0xab0 block/blk-mq.c:2250
#1: ffff88801ca06018 (&host->lock){-.-.}-{2:2}, at:
ata_scsi_queuecmd+0x8a/0x520 drivers/ata/libata-scsi.c:4197
#2: ffffffff8db32fe0 (rcu_read_lock){....}-{1:2}, at:
rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#2: ffffffff8db32fe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock
include/linux/rcupdate.h:781 [inline]
#2: ffffffff8db32fe0 (rcu_read_lock){....}-{1:2}, at:
kill_fasync+0x51/0x4d0 fs/fcntl.c:1048
the dependencies between HARDIRQ-irq-safe lock and the holding lock:
-> (&host->lock){-.-.}-{2:2} {
IN-HARDIRQ-W at:
lock_acquire+0x1a9/0x400 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave
include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120
kernel/locking/spinlock.c:162
__ata_sff_interrupt+0x2d/0x6a0 drivers/ata/libata-sff.c:1470
__handle_irq_event_percpu+0x1f2/0x5f0
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+0x257/0xc10 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
handle_irq arch/x86/kernel/irq.c:247 [inline]
call_irq_handler arch/x86/kernel/irq.c:259 [inline]
__common_interrupt+0x134/0x230 arch/x86/kernel/irq.c:285
common_interrupt+0x9f/0xc0 arch/x86/kernel/irq.c:278
asm_common_interrupt+0x22/0x40
arch/x86/include/asm/idtentry.h:693
__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 kernel/workqueue.c:3248 [inline]
process_scheduled_works+0x977/0x1410 kernel/workqueue.c:3329
worker_thread+0xaa0/0x1020 kernel/workqueue.c:3409
kthread+0x2eb/0x380 kernel/kthread.c:389
ret_from_fork+0x49/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:244
IN-SOFTIRQ-W at:
lock_acquire+0x1a9/0x400 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave
include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120
kernel/locking/spinlock.c:162
__ata_sff_interrupt+0x2d/0x6a0 drivers/ata/libata-sff.c:1470
__handle_irq_event_percpu+0x1f2/0x5f0
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+0x257/0xc10 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
handle_irq arch/x86/kernel/irq.c:247 [inline]
call_irq_handler arch/x86/kernel/irq.c:259 [inline]
__common_interrupt+0x134/0x230 arch/x86/kernel/irq.c:285
common_interrupt+0x9f/0xc0 arch/x86/kernel/irq.c:278
asm_common_interrupt+0x22/0x40
arch/x86/include/asm/idtentry.h:693
__sanitizer_cov_trace_cmp8+0x4/0xa0 kernel/kcov.c:284
orc_find arch/x86/kernel/unwind_orc.c:206 [inline]
unwind_next_frame+0x1a5/0x2930
arch/x86/kernel/unwind_orc.c:494
arch_stack_walk+0x14d/0x1a0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x112/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3b/0x70 mm/kasan/common.c:68
kasan_save_free_info+0x3c/0x50 mm/kasan/generic.c:579
poison_slab_object+0xe0/0x140 mm/kasan/common.c:240
__kasan_slab_free+0x33/0x50 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2196 [inline]
slab_free mm/slub.c:4438 [inline]
kmem_cache_free+0x117/0x280 mm/slub.c:4513
put_signal_struct kernel/fork.c:965 [inline]
__put_task_struct+0x1c5/0x280 kernel/fork.c:980
put_task_struct include/linux/sched/task.h:138 [inline]
delayed_put_task_struct+0x8e/0xf0 kernel/exit.c:228
rcu_do_batch kernel/rcu/tree.c:2535 [inline]
rcu_core+0xaeb/0x17f0 kernel/rcu/tree.c:2809
handle_softirqs+0x272/0x750 kernel/softirq.c:554
run_ksoftirqd+0xc6/0x120 kernel/softirq.c:928
smpboot_thread_fn+0x542/0xa00 kernel/smpboot.c:164
kthread+0x2eb/0x380 kernel/kthread.c:389
ret_from_fork+0x49/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:244
INITIAL USE at:
lock_acquire+0x1a9/0x400 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave
include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120
kernel/locking/spinlock.c:162
ata_dev_init drivers/ata/libata-core.c:5361 [inline]
ata_link_init+0x236/0x880 drivers/ata/libata-core.c:5406
ata_port_alloc+0x3f4/0x4a0 drivers/ata/libata-core.c:5481
ata_host_alloc+0x189/0x2b0 drivers/ata/libata-core.c:5602
ata_host_alloc_pinfo+0x27/0x420
drivers/ata/libata-core.c:5643
ata_pci_sff_prepare_host+0x40/0xe0
drivers/ata/libata-sff.c:2235
ata_pci_bmdma_prepare_host+0x20/0x70
drivers/ata/libata-sff.c:3144
piix_init_one+0x6d1/0x1e90 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+0x51f/0xa10 drivers/pci/pci-driver.c:451
call_driver_probe+0x9a/0x1b0
really_probe+0x274/0x8e0 drivers/base/dd.c:656
__driver_probe_device+0x199/0x380 drivers/base/dd.c:798
driver_probe_device+0x50/0x240 drivers/base/dd.c:828
__driver_attach+0x366/0x5a0 drivers/base/dd.c:1214
bus_for_each_dev+0x269/0x2e0 drivers/base/bus.c:368
bus_add_driver+0x369/0x680 drivers/base/bus.c:673
driver_register+0x236/0x310 drivers/base/driver.c:246
piix_init+0x1b/0x50 drivers/ata/ata_piix.c:1774
do_one_initcall+0xc4/0x310 init/main.c:1267
do_initcall_level+0x14e/0x270 init/main.c:1329
do_initcalls+0x3f/0x80 init/main.c:1345
kernel_init_freeable+0x42e/0x5c0 init/main.c:1578
kernel_init+0x19/0x2a0 init/main.c:1467
ret_from_fork+0x49/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:244
}
... key at: [<ffffffff92c39040>] ata_host_alloc.__key+0x0/0x20
the dependencies between the lock to be acquired
and HARDIRQ-irq-unsafe lock:
-> (tasklist_lock){.+.+}-{2:2} {
HARDIRQ-ON-R at:
lock_acquire+0x1a9/0x400 kernel/locking/lockdep.c:5754
__raw_read_lock
include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
__do_wait+0x126/0x870 kernel/exit.c:1585
do_wait+0x13e/0x310 kernel/exit.c:1629
kernel_wait+0xe4/0x230 kernel/exit.c:1805
call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
call_usermodehelper_exec_work+0xb4/0x220
kernel/umh.c:164
process_one_work kernel/workqueue.c:3248 [inline]
process_scheduled_works+0x977/0x1410
kernel/workqueue.c:3329
worker_thread+0xaa0/0x1020 kernel/workqueue.c:3409
kthread+0x2eb/0x380 kernel/kthread.c:389
ret_from_fork+0x49/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20
arch/x86/entry/entry_64.S:244
SOFTIRQ-ON-R at:
lock_acquire+0x1a9/0x400 kernel/locking/lockdep.c:5754
__raw_read_lock
include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
__do_wait+0x126/0x870 kernel/exit.c:1585
do_wait+0x13e/0x310 kernel/exit.c:1629
kernel_wait+0xe4/0x230 kernel/exit.c:1805
call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
call_usermodehelper_exec_work+0xb4/0x220
kernel/umh.c:164
process_one_work kernel/workqueue.c:3248 [inline]
process_scheduled_works+0x977/0x1410
kernel/workqueue.c:3329
worker_thread+0xaa0/0x1020 kernel/workqueue.c:3409
kthread+0x2eb/0x380 kernel/kthread.c:389
ret_from_fork+0x49/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20
arch/x86/entry/entry_64.S:244
INITIAL USE at:
lock_acquire+0x1a9/0x400 kernel/locking/lockdep.c:5754
__raw_write_lock_irq
include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xcf/0x110
kernel/locking/spinlock.c:326
copy_process+0x226b/0x3d80 kernel/fork.c:2516
kernel_clone+0x224/0x6c0 kernel/fork.c:2797
user_mode_thread+0x12d/0x190 kernel/fork.c:2875
rest_init+0x23/0x300 init/main.c:712
start_kernel+0x486/0x500 init/main.c:1103
x86_64_start_reservations+0x26/0x30
arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x5c/0x60
arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147
INITIAL READ USE at:
lock_acquire+0x1a9/0x400
kernel/locking/lockdep.c:5754
__raw_read_lock
include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40
kernel/locking/spinlock.c:228
__do_wait+0x126/0x870 kernel/exit.c:1585
do_wait+0x13e/0x310 kernel/exit.c:1629
kernel_wait+0xe4/0x230 kernel/exit.c:1805
call_usermodehelper_exec_sync
kernel/umh.c:137 [inline]
call_usermodehelper_exec_work+0xb4/0x220
kernel/umh.c:164
process_one_work kernel/workqueue.c:3248 [inline]
process_scheduled_works+0x977/0x1410
kernel/workqueue.c:3329
worker_thread+0xaa0/0x1020 kernel/workqueue.c:3409
kthread+0x2eb/0x380 kernel/kthread.c:389
ret_from_fork+0x49/0x80
arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20
arch/x86/entry/entry_64.S:244
}
... key at: [<ffffffff8d80a058>] tasklist_lock+0x18/0x40
... acquired at:
__raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
_raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
send_sigio+0xf7/0x360 fs/fcntl.c:830
kill_fasync_rcu fs/fcntl.c:1035 [inline]
kill_fasync+0x232/0x4d0 fs/fcntl.c:1049
__receive_buf drivers/tty/n_tty.c:1656 [inline]
n_tty_receive_buf_common+0x9ea/0x1370 drivers/tty/n_tty.c:1739
tiocsti+0x24a/0x300 drivers/tty/tty_io.c:2299
tty_ioctl+0x514/0xdb0 drivers/tty/tty_io.c:2717
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfe/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x7e/0x150 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x67/0x6f
-> (&f->f_owner.lock){....}-{2:2} {
INITIAL USE at:
lock_acquire+0x1a9/0x400 kernel/locking/lockdep.c:5754
__raw_write_lock_irq
include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xcf/0x110
kernel/locking/spinlock.c:326
f_modown+0x38/0x340 fs/fcntl.c:93
__tty_fasync drivers/tty/tty_io.c:2246 [inline]
tty_fasync+0x24c/0x330 drivers/tty/tty_io.c:2261
ioctl_fioasync fs/ioctl.c:380 [inline]
do_vfs_ioctl+0x196a/0x2d60 fs/ioctl.c:822
__do_sys_ioctl fs/ioctl.c:905 [inline]
__se_sys_ioctl+0x81/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x7e/0x150 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x67/0x6f
INITIAL READ USE at:
lock_acquire+0x1a9/0x400 kernel/locking/lockdep.c:5754
__raw_read_lock_irqsave
include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xd9/0x120
kernel/locking/spinlock.c:236
send_sigio+0x2f/0x360 fs/fcntl.c:816
kill_fasync_rcu fs/fcntl.c:1035 [inline]
kill_fasync+0x232/0x4d0 fs/fcntl.c:1049
__receive_buf drivers/tty/n_tty.c:1656 [inline]
n_tty_receive_buf_common+0x9ea/0x1370
drivers/tty/n_tty.c:1739
tiocsti+0x24a/0x300 drivers/tty/tty_io.c:2299
tty_ioctl+0x514/0xdb0 drivers/tty/tty_io.c:2717
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfe/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x7e/0x150 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x67/0x6f
}
... key at: [<ffffffff92962060>] init_file.__key+0x0/0x20
... acquired at:
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
send_sigio+0x2f/0x360 fs/fcntl.c:816
kill_fasync_rcu fs/fcntl.c:1035 [inline]
kill_fasync+0x232/0x4d0 fs/fcntl.c:1049
__receive_buf drivers/tty/n_tty.c:1656 [inline]
n_tty_receive_buf_common+0x9ea/0x1370 drivers/tty/n_tty.c:1739
tiocsti+0x24a/0x300 drivers/tty/tty_io.c:2299
tty_ioctl+0x514/0xdb0 drivers/tty/tty_io.c:2717
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfe/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x7e/0x150 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x67/0x6f
-> (&new->fa_lock){....}-{2:2} {
INITIAL USE at:
lock_acquire+0x1a9/0x400 kernel/locking/lockdep.c:5754
__raw_write_lock_irq
include/linux/rwlock_api_smp.h:195 [inline]
_raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:326
fasync_remove_entry+0xfb/0x1c0 fs/fcntl.c:905
__tty_fasync drivers/tty/tty_io.c:2228 [inline]
tty_fasync+0x101/0x330 drivers/tty/tty_io.c:2261
__fput+0x738/0x8a0 fs/file_table.c:419
task_work_run+0x239/0x2f0 kernel/task_work.c:180
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+0x12d/0x280
kernel/entry/common.c:218
do_syscall_64+0x8a/0x150 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x67/0x6f
INITIAL READ USE at:
lock_acquire+0x1a9/0x400 kernel/locking/lockdep.c:5754
__raw_read_lock_irqsave
include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xd9/0x120
kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1028 [inline]
kill_fasync+0x196/0x4d0 fs/fcntl.c:1049
__receive_buf drivers/tty/n_tty.c:1656 [inline]
n_tty_receive_buf_common+0x9ea/0x1370
drivers/tty/n_tty.c:1739
tiocsti+0x24a/0x300 drivers/tty/tty_io.c:2299
tty_ioctl+0x514/0xdb0 drivers/tty/tty_io.c:2717
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfe/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x7e/0x150 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x67/0x6f
}
... key at: [<ffffffff92962cc0>] fasync_insert_entry.__key+0x0/0x20
... acquired at:
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1028 [inline]
kill_fasync+0x196/0x4d0 fs/fcntl.c:1049
sg_rq_end_io+0x76a/0xd50 drivers/scsi/sg.c:1407
__blk_mq_end_request+0x4a4/0x620 block/blk-mq.c:1047
scsi_end_request+0x4eb/0x850 drivers/scsi/scsi_lib.c:665
scsi_io_completion_action+0xe85/0x14f0 drivers/scsi/scsi_lib.c:932
scsi_io_completion+0x372/0x420 drivers/scsi/scsi_lib.c:1087
__ata_scsi_queuecmd+0x2ef/0x1020
ata_scsi_queuecmd+0x3b1/0x520 drivers/ata/libata-scsi.c:4201
scsi_dispatch_cmd drivers/scsi/scsi_lib.c:1609 [inline]
scsi_queue_rq+0x1d8e/0x2b40 drivers/scsi/scsi_lib.c:1851
blk_mq_dispatch_rq_list+0x4f2/0x1ba0 block/blk-mq.c:2037
__blk_mq_sched_dispatch_requests+0x3c2/0x17e0 block/blk-mq-sched.c:301
blk_mq_sched_dispatch_requests+0xc7/0x130 block/blk-mq-sched.c:331
blk_mq_run_hw_queue+0x995/0xab0 block/blk-mq.c:2250
blk_execute_rq_nowait+0x1cf/0x240 block/blk-mq.c:1342
sg_common_write+0x911/0x1480 drivers/scsi/sg.c:835
sg_write+0xa4d/0xef0 drivers/scsi/sg.c:710
vfs_write+0x2ac/0xc70 fs/read_write.c:588
ksys_write+0x19b/0x2c0 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x7e/0x150 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x67/0x6f
stack backtrace:
CPU: 0 PID: 19801 Comm: syz.1.961 Not tainted 6.10.0 #13
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x23d/0x360 lib/dump_stack.c:114
print_bad_irq_dependency kernel/locking/lockdep.c:2626 [inline]
check_irq_usage kernel/locking/lockdep.c:2865 [inline]
check_prev_add kernel/locking/lockdep.c:3138 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x71bb/0x8050 kernel/locking/lockdep.c:5137
lock_acquire+0x1a9/0x400 kernel/locking/lockdep.c:5754
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
kill_fasync_rcu fs/fcntl.c:1028 [inline]
kill_fasync+0x196/0x4d0 fs/fcntl.c:1049
sg_rq_end_io+0x76a/0xd50 drivers/scsi/sg.c:1407
__blk_mq_end_request+0x4a4/0x620 block/blk-mq.c:1047
scsi_end_request+0x4eb/0x850 drivers/scsi/scsi_lib.c:665
scsi_io_completion_action+0xe85/0x14f0 drivers/scsi/scsi_lib.c:932
scsi_io_completion+0x372/0x420 drivers/scsi/scsi_lib.c:1087
__ata_scsi_queuecmd+0x2ef/0x1020
ata_scsi_queuecmd+0x3b1/0x520 drivers/ata/libata-scsi.c:4201
scsi_dispatch_cmd drivers/scsi/scsi_lib.c:1609 [inline]
scsi_queue_rq+0x1d8e/0x2b40 drivers/scsi/scsi_lib.c:1851
blk_mq_dispatch_rq_list+0x4f2/0x1ba0 block/blk-mq.c:2037
__blk_mq_sched_dispatch_requests+0x3c2/0x17e0 block/blk-mq-sched.c:301
blk_mq_sched_dispatch_requests+0xc7/0x130 block/blk-mq-sched.c:331
blk_mq_run_hw_queue+0x995/0xab0 block/blk-mq.c:2250
blk_execute_rq_nowait+0x1cf/0x240 block/blk-mq.c:1342
sg_common_write+0x911/0x1480 drivers/scsi/sg.c:835
sg_write+0xa4d/0xef0 drivers/scsi/sg.c:710
vfs_write+0x2ac/0xc70 fs/read_write.c:588
ksys_write+0x19b/0x2c0 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x7e/0x150 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x67/0x6f
RIP: 0033:0x7fd3231809b9
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:00007fd324039038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd323345f80 RCX: 00007fd3231809b9
RDX: 0000000000000034 RSI: 0000000020000240 RDI: 0000000000000004
RBP: 00007fd3231f4f70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd323345f80 R15: 00007ffe6d3672d8
</TASK>
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