------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.7.0-rc3-next-20231201-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.3/25671 is trying to acquire lock:
ffffffff8d19b138 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0x12/0x70 kernel/locking/semaphore.c:139
but task is already holding lock:
ffffffff8dc76ab8 (pool_rwlock){----}-{2:2}, at: stack_depot_put lib/stackdepot.c:621 [inline]
ffffffff8dc76ab8 (pool_rwlock){----}-{2:2}, at: stack_depot_put+0x24/0x110 lib/stackdepot.c:613
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (pool_rwlock){----}-{2:2}:
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0x46/0x90 kernel/locking/spinlock.c:236
stack_depot_save_flags+0x169/0x740 lib/stackdepot.c:508
kasan_save_stack+0x42/0x50 mm/kasan/common.c:48
__kasan_record_aux_stack+0xc2/0xd0 mm/kasan/generic.c:517
task_work_add+0x88/0x2a0 kernel/task_work.c:48
task_tick_numa kernel/sched/fair.c:3512 [inline]
task_tick_fair+0x5a5/0xc30 kernel/sched/fair.c:12599
scheduler_tick+0x210/0x650 kernel/sched/core.c:5674
update_process_times+0x19e/0x220 kernel/time/timer.c:2076
tick_sched_handle+0x8e/0x170 kernel/time/tick-sched.c:255
tick_nohz_highres_handler+0xe9/0x110 kernel/time/tick-sched.c:1516
__run_hrtimer kernel/time/hrtimer.c:1688 [inline]
__hrtimer_run_queues+0x654/0xc20 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
__sysvec_apic_timer_interrupt+0x10c/0x410 arch/x86/kernel/apic/apic.c:1082
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
lock_acquire+0x1f2/0x530 kernel/locking/lockdep.c:5722
fs_reclaim_acquire mm/page_alloc.c:3753 [inline]
fs_reclaim_acquire+0xca/0x140 mm/page_alloc.c:3744
might_alloc include/linux/sched/mm.h:303 [inline]
slab_pre_alloc_hook mm/slub.c:3732 [inline]
slab_alloc_node mm/slub.c:3813 [inline]
kmem_cache_alloc+0x4f/0x320 mm/slub.c:3838
ptlock_alloc mm/memory.c:6173 [inline]
ptlock_init include/linux/mm.h:2906 [inline]
pmd_ptlock_init include/linux/mm.h:3006 [inline]
pagetable_pmd_ctor include/linux/mm.h:3044 [inline]
pmd_alloc_one include/asm-generic/pgalloc.h:137 [inline]
__pmd_alloc+0xc3/0x840 mm/memory.c:5598
pmd_alloc include/linux/mm.h:2805 [inline]
alloc_new_pmd mm/mremap.c:96 [inline]
move_page_tables+0x2214/0x3780 mm/mremap.c:608
shift_arg_pages+0x1f1/0x420 fs/exec.c:715
setup_arg_pages+0x507/0xd30 fs/exec.c:837
load_elf_binary+0xa9e/0x4e10 fs/binfmt_elf.c:1013
search_binary_handler fs/exec.c:1736 [inline]
exec_binprm fs/exec.c:1778 [inline]
bprm_execve fs/exec.c:1853 [inline]
bprm_execve+0x7ef/0x1a80 fs/exec.c:1809
kernel_execve+0x3d7/0x4e0 fs/exec.c:2021
try_to_run_init_process init/main.c:1364 [inline]
kernel_init+0x137/0x2a0 init/main.c:1497
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
-> #2 (&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:558
raw_spin_rq_lock kernel/sched/sched.h:1385 [inline]
rq_lock kernel/sched/sched.h:1699 [inline]
task_fork_fair+0x70/0x240 kernel/sched/fair.c:12619
sched_cgroup_fork+0x3cf/0x510 kernel/sched/core.c:4835
copy_process+0x6a38/0x9770 kernel/fork.c:2601
kernel_clone+0xfd/0x940 kernel/fork.c:2899
user_mode_thread+0xb4/0xf0 kernel/fork.c:2977
rest_init+0x27/0x2b0 init/main.c:695
arch_call_rest_init+0x13/0x30 init/main.c:827
start_kernel+0x39e/0x480 init/main.c:1072
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:555
x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:536
secondary_startup_64_no_verify+0x166/0x16b
-> #1 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:522 [inline]
try_to_wake_up+0x9a/0x13d0 kernel/sched/core.c:4252
up+0x79/0xb0 kernel/locking/semaphore.c:191
__up_console_sem kernel/printk/printk.c:340 [inline]
__console_unlock kernel/printk/printk.c:2706 [inline]
console_unlock+0x1cf/0x260 kernel/printk/printk.c:3038
con_font_set drivers/tty/vt/vt.c:4626 [inline]
con_font_op+0x803/0xf40 drivers/tty/vt/vt.c:4670
vt_k_ioctl drivers/tty/vt/vt_ioctl.c:474 [inline]
vt_ioctl+0x4c6/0x2ff0 drivers/tty/vt/vt_ioctl.c:752
tty_ioctl+0x650/0x1570 drivers/tty/tty_io.c:2784
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x62/0x6a
-> #0 ((console_sem).lock){-.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x246e/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5719
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
down_trylock+0x12/0x70 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x40/0x140 kernel/printk/printk.c:323
console_trylock+0x73/0x130 kernel/printk/printk.c:2659
console_trylock_spinning kernel/printk/printk.c:1923 [inline]
vprintk_emit+0x162/0x5f0 kernel/printk/printk.c:2302
vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2328
__warn_printk+0x158/0x350 kernel/panic.c:721
refcount_warn_saturate+0x149/0x210 lib/refcount.c:28
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
stack_depot_put lib/stackdepot.c:627 [inline]
stack_depot_put+0xe4/0x110 lib/stackdepot.c:613
__kasan_record_aux_stack+0xb3/0xd0 mm/kasan/generic.c:515
insert_work+0x38/0x230 kernel/workqueue.c:1653
__queue_work+0x633/0x11d0 kernel/workqueue.c:1802
queue_work_on+0xed/0x110 kernel/workqueue.c:1837
call_timer_fn+0x1a0/0x5a0 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x769/0xb20 kernel/time/timer.c:2022
run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
__do_softirq+0x216/0x8d5 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb5/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:527
__orc_find+0x7a/0x130 arch/x86/kernel/unwind_orc.c:100
orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
unwind_next_frame+0x329/0x2390 arch/x86/kernel/unwind_orc.c:494
arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
kasan_set_track+0x24/0x30 mm/kasan/common.c:61
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:556
____kasan_slab_free mm/kasan/common.c:237 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:201
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:2087 [inline]
slab_free_freelist_hook+0x86/0x1f0 mm/slub.c:2113
slab_free mm/slub.c:4279 [inline]
kmem_cache_free+0xf8/0x3b0 mm/slub.c:4330
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015
__kfree_skb net/core/skbuff.c:1073 [inline]
kfree_skb_reason+0x13a/0x210 net/core/skbuff.c:1108
kfree_skb include/linux/skbuff.h:1246 [inline]
unix_release_sock+0x813/0xf80 net/unix/af_unix.c:661
unix_release+0x88/0xe0 net/unix/af_unix.c:1064
__sock_release+0xae/0x260 net/socket.c:659
sock_close+0x1c/0x20 net/socket.c:1419
__fput+0x270/0xbb0 fs/file_table.c:382
__fput_sync+0x47/0x50 fs/file_table.c:467
__do_sys_close fs/open.c:1591 [inline]
__se_sys_close fs/open.c:1576 [inline]
__x64_sys_close+0x86/0xf0 fs/open.c:1576
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x62/0x6a
other info that might help us debug this:
Chain exists of:
(console_sem).lock --> &rq->__lock --> pool_rwlock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(pool_rwlock);
lock(&rq->__lock);
lock(pool_rwlock);
lock((console_sem).lock);
*** DEADLOCK ***
5 locks held by syz-executor.3/25671:
#0: ffff888083130810 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#0: ffff888083130810 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x260 net/socket.c:658
#1: ffffc90000007ce0 ((&q->timeout)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5a0 kernel/time/timer.c:1697
#2: ffffffff8d1ad6e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#2: ffffffff8d1ad6e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#2: ffffffff8d1ad6e0 (rcu_read_lock){....}-{1:2}, at: __queue_work+0xf2/0x11d0 kernel/workqueue.c:1730
#3: ffff8880b983c2f8 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x39e/0x11d0 kernel/workqueue.c:1766
#4: ffffffff8dc76ab8 (pool_rwlock){----}-{2:2}, at: stack_depot_put lib/stackdepot.c:621 [inline]
#4: ffffffff8dc76ab8 (pool_rwlock){----}-{2:2}, at: stack_depot_put+0x24/0x110 lib/stackdepot.c:613
stack backtrace:
CPU: 0 PID: 25671 Comm: syz-executor.3 Not tainted 6.7.0-rc3-next-20231201-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
check_noncircular+0x316/0x400 kernel/locking/lockdep.c:2187
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x246e/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5719
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
down_trylock+0x12/0x70 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x40/0x140 kernel/printk/printk.c:323
console_trylock+0x73/0x130 kernel/printk/printk.c:2659
console_trylock_spinning kernel/printk/printk.c:1923 [inline]
vprintk_emit+0x162/0x5f0 kernel/printk/printk.c:2302
vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2328
__warn_printk+0x158/0x350 kernel/panic.c:721
refcount_warn_saturate+0x149/0x210 lib/refcount.c:28
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
stack_depot_put lib/stackdepot.c:627 [inline]
stack_depot_put+0xe4/0x110 lib/stackdepot.c:613
__kasan_record_aux_stack+0xb3/0xd0 mm/kasan/generic.c:515
insert_work+0x38/0x230 kernel/workqueue.c:1653
__queue_work+0x633/0x11d0 kernel/workqueue.c:1802
queue_work_on+0xed/0x110 kernel/workqueue.c:1837
call_timer_fn+0x1a0/0x5a0 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x769/0xb20 kernel/time/timer.c:2022
run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
__do_softirq+0x216/0x8d5 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb5/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200
Code: 66 99 dc 02 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <f3> 0f 1e fa 65 48 8b 15 e4 96 7b 7e 65 8b 05 e5 96 7b 7e a9 00 01
RSP: 0018:ffffc90012d2f7e8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffffffff8f51c3b0 RCX: ffffffff813a3bd4
RDX: ffff8880269e0000 RSI: ffffffff813a3be7 RDI: 0000000000000006
RBP: ffffffff8f51c3d4 R08: 0000000000000006 R09: ffffffff81df6892
R10: ffffffff81df68aa R11: 0000000000000001 R12: ffffffff81df6892
R13: ffffffff81df68aa R14: dffffc0000000000 R15: ffffffff8f51c3d8
__orc_find+0x7a/0x130 arch/x86/kernel/unwind_orc.c:100
orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
unwind_next_frame+0x329/0x2390 arch/x86/kernel/unwind_orc.c:494
arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
kasan_set_track+0x24/0x30 mm/kasan/common.c:61
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:556
____kasan_slab_free mm/kasan/common.c:237 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:201
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:2087 [inline]
slab_free_freelist_hook+0x86/0x1f0 mm/slub.c:2113
slab_free mm/slub.c:4279 [inline]
kmem_cache_free+0xf8/0x3b0 mm/slub.c:4330
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015
__kfree_skb net/core/skbuff.c:1073 [inline]
kfree_skb_reason+0x13a/0x210 net/core/skbuff.c:1108
kfree_skb include/linux/skbuff.h:1246 [inline]
unix_release_sock+0x813/0xf80 net/unix/af_unix.c:661
unix_release+0x88/0xe0 net/unix/af_unix.c:1064
__sock_release+0xae/0x260 net/socket.c:659
sock_close+0x1c/0x20 net/socket.c:1419
__fput+0x270/0xbb0 fs/file_table.c:382
__fput_sync+0x47/0x50 fs/file_table.c:467
__do_sys_close fs/open.c:1591 [inline]
__se_sys_close fs/open.c:1576 [inline]
__x64_sys_close+0x86/0xf0 fs/open.c:1576
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7f615e87b9da
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24
RSP: 002b:00007ffe62e90e80 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 00007f615e87b9da
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 00007f615e99d980 R08: 0000001b32f20000 R09: 0000000000000033
R10: 00000000813a48cb R11: 0000000000000293 R12: 0000000000140056
R13: ffffffffffffffff R14: 00007f615e400000 R15: 000000000013fd15
</TASK>
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 25671 at lib/refcount.c:28 refcount_warn_saturate+0x14a/0x210 lib/refcount.c:28
Modules linked in:
CPU: 0 PID: 25671 Comm: syz-executor.3 Not tainted 6.7.0-rc3-next-20231201-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:refcount_warn_saturate+0x14a/0x210 lib/refcount.c:28
Code: ff 89 de e8 c8 60 23 fd 84 db 0f 85 66 ff ff ff e8 8b 65 23 fd c6 05 31 e6 be 0a 01 90 48 c7 c7 20 b9 2e 8b e8 e7 53 e9 fc 90 <0f> 0b 90 90 e9 43 ff ff ff e8 68 65 23 fd 0f b6 1d 0c e6 be 0a 31
RSP: 0018:ffffc90000007b50 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff814e15d9
RDX: ffff8880269e0000 RSI: ffffffff814e15e6 RDI: 0000000000000001
RBP: ffff88802084f97c R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: fffffffffffcbb98 R12: ffff888017ad8a00
R13: ffff8880130a6400 R14: ffff8880130a645c R15: ffff8880b983c340
FS: 000055555744b480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32b23000 CR3: 000000003161c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
stack_depot_put lib/stackdepot.c:627 [inline]
stack_depot_put+0xe4/0x110 lib/stackdepot.c:613
__kasan_record_aux_stack+0xb3/0xd0 mm/kasan/generic.c:515
insert_work+0x38/0x230 kernel/workqueue.c:1653
__queue_work+0x633/0x11d0 kernel/workqueue.c:1802
queue_work_on+0xed/0x110 kernel/workqueue.c:1837
call_timer_fn+0x1a0/0x5a0 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x769/0xb20 kernel/time/timer.c:2022
run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
__do_softirq+0x216/0x8d5 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb5/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200
Code: 66 99 dc 02 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <f3> 0f 1e fa 65 48 8b 15 e4 96 7b 7e 65 8b 05 e5 96 7b 7e a9 00 01
RSP: 0018:ffffc90012d2f7e8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffffffff8f51c3b0 RCX: ffffffff813a3bd4
RDX: ffff8880269e0000 RSI: ffffffff813a3be7 RDI: 0000000000000006
RBP: ffffffff8f51c3d4 R08: 0000000000000006 R09: ffffffff81df6892
R10: ffffffff81df68aa R11: 0000000000000001 R12: ffffffff81df6892
R13: ffffffff81df68aa R14: dffffc0000000000 R15: ffffffff8f51c3d8
__orc_find+0x7a/0x130 arch/x86/kernel/unwind_orc.c:100
orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
unwind_next_frame+0x329/0x2390 arch/x86/kernel/unwind_orc.c:494
arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
kasan_set_track+0x24/0x30 mm/kasan/common.c:61
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:556
____kasan_slab_free mm/kasan/common.c:237 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:201
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:2087 [inline]
slab_free_freelist_hook+0x86/0x1f0 mm/slub.c:2113
slab_free mm/slub.c:4279 [inline]
kmem_cache_free+0xf8/0x3b0 mm/slub.c:4330
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015
__kfree_skb net/core/skbuff.c:1073 [inline]
kfree_skb_reason+0x13a/0x210 net/core/skbuff.c:1108
kfree_skb include/linux/skbuff.h:1246 [inline]
unix_release_sock+0x813/0xf80 net/unix/af_unix.c:661
unix_release+0x88/0xe0 net/unix/af_unix.c:1064
__sock_release+0xae/0x260 net/socket.c:659
sock_close+0x1c/0x20 net/socket.c:1419
__fput+0x270/0xbb0 fs/file_table.c:382
__fput_sync+0x47/0x50 fs/file_table.c:467
__do_sys_close fs/open.c:1591 [inline]
__se_sys_close fs/open.c:1576 [inline]
__x64_sys_close+0x86/0xf0 fs/open.c:1576
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7f615e87b9da
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24
RSP: 002b:00007ffe62e90e80 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 00007f615e87b9da
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 00007f615e99d980 R08: 0000001b32f20000 R09: 0000000000000033
R10: 00000000813a48cb R11: 0000000000000293 R12: 0000000000140056
R13: ffffffffffffffff R14: 00007f615e400000 R15: 000000000013fd15
</TASK>
----------------
Code disassembly (best guess):
0: 66 99 cwtd
2: dc 02 faddl (%rdx)
4: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
a: f3 0f 1e fa endbr64
e: 48 8b be b0 01 00 00 mov 0x1b0(%rsi),%rdi
15: e8 b0 ff ff ff call 0xffffffca
1a: 31 c0 xor %eax,%eax
1c: c3 ret
1d: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
24: 00 00 00 00
28: 66 90 xchg %ax,%ax
* 2a: f3 0f 1e fa endbr64 <-- trapping instruction
2e: 65 48 8b 15 e4 96 7b mov %gs:0x7e7b96e4(%rip),%rdx # 0x7e7b971a
35: 7e
36: 65 8b 05 e5 96 7b 7e mov %gs:0x7e7b96e5(%rip),%eax # 0x7e7b9722
3d: a9 .byte 0xa9
3e: 00 01 add %al,(%rcx)