------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Tainted: G U I L
------------------------------------------------------
syz.6.6389/31237 is trying to acquire lock:
ffffffff8e2d6a40 (console_owner){-.-.}-{0:0}, at: console_lock_spinning_enable+0x61/0x80 kernel/printk/printk.c:1900
but task is already holding lock:
ffff8880b843add8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:647 [inline]
ffff8880b843add8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:632
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (&rq->__lock){-.-.}-{2:2}:
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:639
raw_spin_rq_lock kernel/sched/sched.h:1580 [inline]
task_rq_lock+0xcf/0x490 kernel/sched/core.c:739
cgroup_move_task+0x81/0x2a0 kernel/sched/psi.c:1170
css_set_move_task+0x288/0x5f0 kernel/cgroup/cgroup.c:948
cgroup_post_fork+0x201/0x9e0 kernel/cgroup/cgroup.c:6910
copy_process+0x56b6/0x7430 kernel/fork.c:2465
kernel_clone+0xfc/0x910 kernel/fork.c:2651
user_mode_thread+0xc8/0x110 kernel/fork.c:2727
rest_init+0x23/0x2b0 init/main.c:722
start_kernel+0x3ef/0x4d0 init/main.c:1206
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148
-> #3 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:557 [inline]
try_to_wake_up+0xb7/0x1860 kernel/sched/core.c:4106
__wake_up_common+0x135/0x1f0 kernel/sched/wait.c:108
__wake_up_common_lock kernel/sched/wait.c:125 [inline]
__wake_up+0x31/0x60 kernel/sched/wait.c:146
tty_port_default_wakeup+0x4d/0x60 drivers/tty/tty_port.c:67
serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1719
serial8250_handle_irq+0x761/0xcb0 drivers/tty/serial/8250/8250_port.c:1827
serial8250_default_handle_irq+0x9e/0x270 drivers/tty/serial/8250/8250_port.c:1846
serial8250_interrupt+0xf8/0x1d0 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x236/0x890 kernel/irq/handle.c:211
handle_irq_event_percpu kernel/irq/handle.c:248 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:265
handle_edge_irq+0x3ca/0x9e0 kernel/irq/chip.c:855
generic_handle_irq_desc include/linux/irqdesc.h:172 [inline]
handle_irq arch/x86/kernel/irq.c:255 [inline]
call_irq_handler arch/x86/kernel/irq.c:311 [inline]
__common_interrupt+0xd0/0x2f0 arch/x86/kernel/irq.c:326
common_interrupt+0x61/0xe0 arch/x86/kernel/irq.c:319
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
-> #2 (&tty->write_wait){-.-.}-{3:3}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
__wake_up_common_lock kernel/sched/wait.c:124 [inline]
__wake_up+0x1c/0x60 kernel/sched/wait.c:146
tty_port_default_wakeup+0x4d/0x60 drivers/tty/tty_port.c:67
serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1719
serial8250_handle_irq+0x761/0xcb0 drivers/tty/serial/8250/8250_port.c:1827
serial8250_default_handle_irq+0x9e/0x270 drivers/tty/serial/8250/8250_port.c:1846
serial8250_interrupt+0xf8/0x1d0 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x236/0x890 kernel/irq/handle.c:211
handle_irq_event_percpu kernel/irq/handle.c:248 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:265
handle_edge_irq+0x3ca/0x9e0 kernel/irq/chip.c:855
generic_handle_irq_desc include/linux/irqdesc.h:172 [inline]
handle_irq arch/x86/kernel/irq.c:255 [inline]
call_irq_handler arch/x86/kernel/irq.c:311 [inline]
__common_interrupt+0xd0/0x2f0 arch/x86/kernel/irq.c:326
common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:319
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
uart_port_unlock_irqrestore include/linux/serial_core.h:788 [inline]
uart_port_unlock_deref drivers/tty/serial/serial_core.c:91 [inline]
uart_port_unlock_deref drivers/tty/serial/serial_core.c:88 [inline]
uart_write+0x2a4/0xb30 drivers/tty/serial/serial_core.c:634
process_output_block drivers/tty/n_tty.c:557 [inline]
n_tty_write+0x434/0x1280 drivers/tty/n_tty.c:2366
iterate_tty_write drivers/tty/tty_io.c:1006 [inline]
file_tty_write.constprop.0+0x503/0x9b0 drivers/tty/tty_io.c:1081
tty_write drivers/tty/tty_io.c:1102 [inline]
redirected_tty_write drivers/tty/tty_io.c:1125 [inline]
redirected_tty_write+0xd4/0x120 drivers/tty/tty_io.c:1105
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #1 (&port_lock_key){-.-.}-{3:3}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
uart_port_lock_irqsave include/linux/serial_core.h:717 [inline]
serial8250_console_write+0x181/0x1890 drivers/tty/serial/8250/8250_port.c:3301
console_emit_next_record kernel/printk/printk.c:3129 [inline]
console_flush_one_record+0x796/0xc60 kernel/printk/printk.c:3215
console_flush_all kernel/printk/printk.c:3289 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
console_unlock+0xef/0x240 kernel/printk/printk.c:3359
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426
_printk+0xc7/0x100 kernel/printk/printk.c:2451
register_console+0x823/0x1210 kernel/printk/printk.c:4170
univ8250_console_init+0x5f/0x90 drivers/tty/serial/8250/8250_core.c:515
console_init+0x152/0x600 kernel/printk/printk.c:4369
start_kernel+0x298/0x4d0 init/main.c:1143
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148
-> #0 (console_owner){-.-.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x1669/0x2890 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x179/0x330 kernel/locking/lockdep.c:5825
console_lock_spinning_enable+0x72/0x80 kernel/printk/printk.c:1900
console_emit_next_record kernel/printk/printk.c:3123 [inline]
console_flush_one_record+0x73f/0xc60 kernel/printk/printk.c:3215
console_flush_all kernel/printk/printk.c:3289 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
console_unlock+0xef/0x240 kernel/printk/printk.c:3359
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426
_printk+0xc7/0x100 kernel/printk/printk.c:2451
__report_bug+0x3a6/0x520 lib/bug.c:243
report_bug+0xb2/0x220 lib/bug.c:281
handle_bug+0x127/0x260 arch/x86/kernel/traps.c:435
exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:489
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:616
lockdep_assert_rq_held kernel/sched/sched.h:1571 [inline]
lockdep_assert_rq_held kernel/sched/sched.h:1569 [inline]
update_rq_clock+0x34a/0xc70 kernel/sched/core.c:837
pick_next_task kernel/sched/core.c:6092 [inline]
__schedule+0x20fd/0x5ee0 kernel/sched/core.c:6809
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7194
irqentry_exit+0x1d8/0x8c0 kernel/entry/common.c:216
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
rol32 include/linux/bitops.h:126 [inline]
jhash2 include/linux/jhash.h:129 [inline]
hash_stack lib/stackdepot.c:563 [inline]
stack_depot_save_flags+0xaf/0x9b0 lib/stackdepot.c:664
save_stack+0x16d/0x1f0 mm/page_owner.c:166
__reset_page_owner+0x84/0x1a0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2973
vfree+0x1fd/0xb50 mm/vmalloc.c:3466
snd_dma_free_pages+0xd2/0x130 sound/core/memalloc.c:132
do_free_pages sound/core/pcm_memory.c:88 [inline]
do_free_pages sound/core/pcm_memory.c:83 [inline]
snd_pcm_lib_free_pages+0x172/0x390 sound/core/pcm_memory.c:495
do_hw_free sound/core/pcm_native.c:916 [inline]
snd_pcm_release_substream.part.0+0x2a8/0x340 sound/core/pcm_native.c:2740
snd_pcm_release_substream+0x5b/0x70 sound/core/pcm_native.c:2734
snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2398 [inline]
snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2390 [inline]
snd_pcm_oss_release+0x135/0x310 sound/core/oss/pcm_oss.c:2577
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
exit_to_user_mode_loop+0xfb/0x540 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
console_owner --> &p->pi_lock --> &rq->__lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rq->__lock);
lock(&p->pi_lock);
lock(&rq->__lock);
lock(console_owner);
*** DEADLOCK ***
4 locks held by syz.6.6389/31237:
#0: ffff88802ff6aae0 (&pcm->open_mutex){+.+.}-{4:4}, at: snd_pcm_oss_release+0xfb/0x310 sound/core/oss/pcm_oss.c:2576
#1: ffff8880b843add8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:647 [inline]
#1: ffff8880b843add8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:632
#2: ffffffff8e3b6e80 (console_lock){+.+.}-{0:0}, at: _printk+0xc7/0x100 kernel/printk/printk.c:2451
#3: ffffffff8e3b6ef8 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:336 [inline]
#3: ffffffff8e3b6ef8 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:409 [inline]
#3: ffffffff8e3b6ef8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:289 [inline]
#3: ffffffff8e3b6ef8 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x103/0xc60 kernel/printk/printk.c:3192
stack backtrace:
CPU: 0 UID: 0 PID: 31237 Comm: syz.6.6389 Tainted: G U I L syzkaller #0 PREEMPT(full)
Tainted: [U]=USER, [I]=FIRMWARE_WORKAROUND, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_circular_bug+0x275/0x340 kernel/locking/lockdep.c:2043
check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x1669/0x2890 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x179/0x330 kernel/locking/lockdep.c:5825
console_lock_spinning_enable+0x72/0x80 kernel/printk/printk.c:1900
console_emit_next_record kernel/printk/printk.c:3123 [inline]
console_flush_one_record+0x73f/0xc60 kernel/printk/printk.c:3215
console_flush_all kernel/printk/printk.c:3289 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
console_unlock+0xef/0x240 kernel/printk/printk.c:3359
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426
_printk+0xc7/0x100 kernel/printk/printk.c:2451
__report_bug+0x3a6/0x520 lib/bug.c:243
report_bug+0xb2/0x220 lib/bug.c:281
handle_bug+0x127/0x260 arch/x86/kernel/traps.c:435
exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:489
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:616
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1571 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1569 [inline]
RIP: 0010:update_rq_clock+0x34a/0xc70 kernel/sched/core.c:837
Code: ab 48 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f e9 18 6c ee 09 a8 04 0f 84 9c fd ff ff 90 0f 0b 90 e9 93 fd ff ff 90 <0f> 0b 90 e9 4f fd ff ff 48 8d bb 18 0e 00 00 48 b8 00 00 00 00 00
RSP: 0018:ffffc9000caaf768 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b853adc0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8daa5ea0 RDI: ffffffff8bf2b600
RBP: 0000000000000001 R08: ffff8880b843b8c8 R09: fffffbfff211205a
R10: ffffffff908902d7 R11: 0000000000000001 R12: ffffffff90893354
R13: ffffffff8dd66760 R14: ffff88801dea3d00 R15: ffff8880b853adc0
pick_next_task kernel/sched/core.c:6092 [inline]
__schedule+0x20fd/0x5ee0 kernel/sched/core.c:6809
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7194
irqentry_exit+0x1d8/0x8c0 kernel/entry/common.c:216
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:jhash2 include/linux/jhash.h:129 [inline]
RIP: 0010:hash_stack lib/stackdepot.c:563 [inline]
RIP: 0010:stack_depot_save_flags+0xaf/0x9b0 lib/stackdepot.c:664
Code: 41 89 f9 41 29 fa 8d 1c 07 41 c1 c1 06 45 31 d1 44 89 cf 44 29 c8 41 01 d9 c1 c7 08 31 f8 29 c3 89 df 89 c3 44 01 c8 c1 c3 10 <31> fb 89 df 41 29 d9 01 c3 c1 cf 0d 41 31 f9 44 29 c8 89 c7 44 89
RSP: 0018:ffffc9000caafa28 EFLAGS: 00000a12
RAX: 00000000771e1de3 RBX: 000000000b6eb494 RCX: ffffc9000caafae8
RDX: ffffffff81000130 RSI: 0000000000000006 RDI: 0000000020e9bbeb
RBP: 000000000000000c R08: 0000000000000001 R09: 00000000c28a1275
R10: 0000000009956597 R11: ffff8880299829b0 R12: 0000000000000001
R13: 0000000000002000 R14: 000000000000000c R15: ffffc9000caafaa0
save_stack+0x16d/0x1f0 mm/page_owner.c:166
__reset_page_owner+0x84/0x1a0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2973
vfree+0x1fd/0xb50 mm/vmalloc.c:3466
snd_dma_free_pages+0xd2/0x130 sound/core/memalloc.c:132
do_free_pages sound/core/pcm_memory.c:88 [inline]
do_free_pages sound/core/pcm_memory.c:83 [inline]
snd_pcm_lib_free_pages+0x172/0x390 sound/core/pcm_memory.c:495
do_hw_free sound/core/pcm_native.c:916 [inline]
snd_pcm_release_substream.part.0+0x2a8/0x340 sound/core/pcm_native.c:2740
snd_pcm_release_substream+0x5b/0x70 sound/core/pcm_native.c:2734
snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2398 [inline]
snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2390 [inline]
snd_pcm_oss_release+0x135/0x310 sound/core/oss/pcm_oss.c:2577
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
exit_to_user_mode_loop+0xfb/0x540 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0b3af8f7c9
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:00007ffe650677c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f0b3b1e7da0 RCX: 00007f0b3af8f7c9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f0b3b1e7da0 R08: 0000000000000000 R09: 0000001d65067abf
R10: 00007f0b3b1e7cb0 R11: 0000000000000246 R12: 00000000001675b0
R13: 00007f0b3b1e6450 R14: ffffffffffffffff R15: 00007ffe650678e0
WARNING: kernel/sched/sched.h:1571 at lockdep_assert_rq_held kernel/sched/sched.h:1571 [inline], CPU#0: syz.6.6389/31237
WARNING: kernel/sched/sched.h:1571 at lockdep_assert_rq_held kernel/sched/sched.h:1569 [inline], CPU#0: syz.6.6389/31237
WARNING: kernel/sched/sched.h:1571 at update_rq_clock+0x34a/0xc70 kernel/sched/core.c:837, CPU#0: syz.6.6389/31237
Modules linked in:
CPU: 0 UID: 0 PID: 31237 Comm: syz.6.6389 Tainted: G U I L syzkaller #0 PREEMPT(full)
Tainted: [U]=USER, [I]=FIRMWARE_WORKAROUND, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1571 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1569 [inline]
RIP: 0010:update_rq_clock+0x34a/0xc70 kernel/sched/core.c:837
Code: ab 48 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f e9 18 6c ee 09 a8 04 0f 84 9c fd ff ff 90 0f 0b 90 e9 93 fd ff ff 90 <0f> 0b 90 e9 4f fd ff ff 48 8d bb 18 0e 00 00 48 b8 00 00 00 00 00
RSP: 0018:ffffc9000caaf768 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b853adc0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8daa5ea0 RDI: ffffffff8bf2b600
RBP: 0000000000000001 R08: ffff8880b843b8c8 R09: fffffbfff211205a
R10: ffffffff908902d7 R11: 0000000000000001 R12: ffffffff90893354
R13: ffffffff8dd66760 R14: ffff88801dea3d00 R15: ffff8880b853adc0
FS: 000055557eeae500(0000) GS:ffff8881248f6000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f45b2ecb7c4 CR3: 000000004434e000 CR4: 00000000003526f0
Call Trace:
pick_next_task kernel/sched/core.c:6092 [inline]
__schedule+0x20fd/0x5ee0 kernel/sched/core.c:6809
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7194
irqentry_exit+0x1d8/0x8c0 kernel/entry/common.c:216
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:jhash2 include/linux/jhash.h:129 [inline]
RIP: 0010:hash_stack lib/stackdepot.c:563 [inline]
RIP: 0010:stack_depot_save_flags+0xaf/0x9b0 lib/stackdepot.c:664
Code: 41 89 f9 41 29 fa 8d 1c 07 41 c1 c1 06 45 31 d1 44 89 cf 44 29 c8 41 01 d9 c1 c7 08 31 f8 29 c3 89 df 89 c3 44 01 c8 c1 c3 10 <31> fb 89 df 41 29 d9 01 c3 c1 cf 0d 41 31 f9 44 29 c8 89 c7 44 89
RSP: 0018:ffffc9000caafa28 EFLAGS: 00000a12
RAX: 00000000771e1de3 RBX: 000000000b6eb494 RCX: ffffc9000caafae8
RDX: ffffffff81000130 RSI: 0000000000000006 RDI: 0000000020e9bbeb
RBP: 000000000000000c R08: 0000000000000001 R09: 00000000c28a1275
R10: 0000000009956597 R11: ffff8880299829b0 R12: 0000000000000001
R13: 0000000000002000 R14: 000000000000000c R15: ffffc9000caafaa0
save_stack+0x16d/0x1f0 mm/page_owner.c:166
__reset_page_owner+0x84/0x1a0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2973
vfree+0x1fd/0xb50 mm/vmalloc.c:3466
snd_dma_free_pages+0xd2/0x130 sound/core/memalloc.c:132
do_free_pages sound/core/pcm_memory.c:88 [inline]
do_free_pages sound/core/pcm_memory.c:83 [inline]
snd_pcm_lib_free_pages+0x172/0x390 sound/core/pcm_memory.c:495
do_hw_free sound/core/pcm_native.c:916 [inline]
snd_pcm_release_substream.part.0+0x2a8/0x340 sound/core/pcm_native.c:2740
snd_pcm_release_substream+0x5b/0x70 sound/core/pcm_native.c:2734
snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2398 [inline]
snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2390 [inline]
snd_pcm_oss_release+0x135/0x310 sound/core/oss/pcm_oss.c:2577
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
exit_to_user_mode_loop+0xfb/0x540 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0b3af8f7c9
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:00007ffe650677c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f0b3b1e7da0 RCX: 00007f0b3af8f7c9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f0b3b1e7da0 R08: 0000000000000000 R09: 0000001d65067abf
R10: 00007f0b3b1e7cb0 R11: 0000000000000246 R12: 00000000001675b0
R13: 00007f0b3b1e6450 R14: ffffffffffffffff R15: 00007ffe650678e0
----------------
Code disassembly (best guess):
0: 41 89 f9 mov %edi,%r9d
3: 41 29 fa sub %edi,%r10d
6: 8d 1c 07 lea (%rdi,%rax,1),%ebx
9: 41 c1 c1 06 rol $0x6,%r9d
d: 45 31 d1 xor %r10d,%r9d
10: 44 89 cf mov %r9d,%edi
13: 44 29 c8 sub %r9d,%eax
16: 41 01 d9 add %ebx,%r9d
19: c1 c7 08 rol $0x8,%edi
1c: 31 f8 xor %edi,%eax
1e: 29 c3 sub %eax,%ebx
20: 89 df mov %ebx,%edi
22: 89 c3 mov %eax,%ebx
24: 44 01 c8 add %r9d,%eax
27: c1 c3 10 rol $0x10,%ebx
* 2a: 31 fb xor %edi,%ebx <-- trapping instruction
2c: 89 df mov %ebx,%edi
2e: 41 29 d9 sub %ebx,%r9d
31: 01 c3 add %eax,%ebx
33: c1 cf 0d ror $0xd,%edi
36: 41 31 f9 xor %edi,%r9d
39: 44 29 c8 sub %r9d,%eax
3c: 89 c7 mov %eax,%edi
3e: 44 rex.R
3f: 89 .byte 0x89