FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.7.711/8983 is trying to acquire lock:
ffffffff8cd24080 (console_owner){-...}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:339 [inline]
ffffffff8cd24080 (console_owner){-...}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline]
ffffffff8cd24080 (console_owner){-...}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:292 [inline]
ffffffff8cd24080 (console_owner){-...}-{0:0}, at: console_flush_all+0x10f/0xd00 kernel/printk/printk.c:2992
but task is already holding lock:
ffff8880b8e3c458 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:566
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+0x32/0x50 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
raw_spin_rq_lock kernel/sched/sched.h:1372 [inline]
rq_lock kernel/sched/sched.h:1681 [inline]
task_fork_fair+0x62/0x1f0 kernel/sched/fair.c:12675
sched_cgroup_fork+0x333/0x3c0 kernel/sched/core.c:4816
copy_process+0x21e4/0x3d70 kernel/fork.c:2614
kernel_clone+0x21b/0x840 kernel/fork.c:2914
user_mode_thread+0xde/0x130 kernel/fork.c:2992
rest_init+0x27/0x300 init/main.c:697
arch_call_rest_init+0xe/0x10 init/main.c:829
start_kernel+0x459/0x4e0 init/main.c:1074
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555
copy_bootdata+0x0/0xe0 arch/x86/kernel/head64.c:536
secondary_startup_64_no_verify+0x179/0x17b
-> #3 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa8/0xf0 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:522 [inline]
try_to_wake_up+0x60/0x1140 kernel/sched/core.c:4232
__wake_up_common+0x2a4/0x4e0 kernel/sched/wait.c:107
__wake_up_common_lock kernel/sched/wait.c:138 [inline]
__wake_up+0x112/0x190 kernel/sched/wait.c:160
tty_port_default_wakeup+0xa2/0xf0 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x6bd/0x8a0 drivers/tty/serial/8250/8250_port.c:1837
serial8250_handle_irq+0x534/0x6e0 drivers/tty/serial/8250/8250_port.c:1944
serial8250_default_handle_irq+0xb8/0x1a0 drivers/tty/serial/8250/8250_port.c:1964
serial8250_interrupt+0x9f/0x1c0 drivers/tty/serial/8250/8250_core.c:127
__handle_irq_event_percpu+0x276/0x930 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x247/0xb30 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:161 [inline]
handle_irq arch/x86/kernel/irq.c:240 [inline]
__common_interrupt+0x13b/0x230 arch/x86/kernel/irq.c:259
common_interrupt+0xb4/0xd0 arch/x86/kernel/irq.c:249
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:678
lock_release+0x57c/0x8b0 kernel/locking/lockdep.c:5778
__raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
_raw_spin_unlock+0x16/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
rmqueue_pcplist mm/page_alloc.c:2765 [inline]
rmqueue mm/page_alloc.c:2801 [inline]
get_page_from_freelist+0x6a8/0x19f0 mm/page_alloc.c:3188
__alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457
__folio_alloc+0x10/0x20 mm/page_alloc.c:4489
vma_alloc_folio+0x47a/0x8f0 mm/mempolicy.c:2242
shmem_alloc_folio+0x179/0x230 mm/shmem.c:1680
shmem_alloc_and_acct_folio+0x189/0x630 mm/shmem.c:1705
shmem_get_folio_gfp+0xcde/0x2ac0 mm/shmem.c:2042
shmem_get_folio mm/shmem.c:2165 [inline]
shmem_write_begin+0xf2/0x420 mm/shmem.c:2707
generic_perform_write+0x2fb/0x5b0 mm/filemap.c:4016
shmem_file_write_iter+0xfb/0x120 mm/shmem.c:2884
call_write_iter include/linux/fs.h:2018 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x43b/0x940 fs/read_write.c:584
ksys_write+0x147/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
-> #2 (&tty->write_wait){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa8/0xf0 kernel/locking/spinlock.c:162
__wake_up_common_lock kernel/sched/wait.c:137 [inline]
__wake_up+0xf8/0x190 kernel/sched/wait.c:160
tty_port_default_wakeup+0xa2/0xf0 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x6bd/0x8a0 drivers/tty/serial/8250/8250_port.c:1837
serial8250_handle_irq+0x534/0x6e0 drivers/tty/serial/8250/8250_port.c:1944
serial8250_default_handle_irq+0xb8/0x1a0 drivers/tty/serial/8250/8250_port.c:1964
serial8250_interrupt+0x9f/0x1c0 drivers/tty/serial/8250/8250_core.c:127
__handle_irq_event_percpu+0x276/0x930 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x247/0xb30 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:161 [inline]
handle_irq arch/x86/kernel/irq.c:240 [inline]
__common_interrupt+0x13b/0x230 arch/x86/kernel/irq.c:259
common_interrupt+0xb4/0xd0 arch/x86/kernel/irq.c:249
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:678
native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:147
arch_safe_halt arch/x86/include/asm/paravirt.h:108 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:753
default_idle_call+0x6c/0xa0 kernel/sched/idle.c:97
cpuidle_idle_call kernel/sched/idle.c:170 [inline]
do_idle+0x1eb/0x510 kernel/sched/idle.c:282
cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:380
rest_init+0x2e2/0x300 init/main.c:732
arch_call_rest_init+0xe/0x10 init/main.c:829
start_kernel+0x459/0x4e0 init/main.c:1074
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555
copy_bootdata+0x0/0xe0 arch/x86/kernel/head64.c:536
secondary_startup_64_no_verify+0x179/0x17b
-> #1 (&port_lock_key){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa8/0xf0 kernel/locking/spinlock.c:162
serial8250_console_write+0x16d/0x17a0 drivers/tty/serial/8250/8250_port.c:3433
console_emit_next_record kernel/printk/printk.c:2944 [inline]
console_flush_all+0x6cd/0xd00 kernel/printk/printk.c:3000
console_unlock+0xae/0x340 kernel/printk/printk.c:3069
vprintk_emit+0x477/0x600 kernel/printk/printk.c:2341
_printk+0xd0/0x110 kernel/printk/printk.c:2366
register_console+0x91b/0xe60 kernel/printk/printk.c:3583
univ8250_console_init+0x45/0x50 drivers/tty/serial/8250/8250_core.c:717
console_init+0x17b/0x5e0 kernel/printk/printk.c:3726
start_kernel+0x2c0/0x4e0 init/main.c:1010
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555
copy_bootdata+0x0/0xe0 arch/x86/kernel/head64.c:536
secondary_startup_64_no_verify+0x179/0x17b
-> #0 (console_owner){-...}-{0:0}:
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+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
console_lock_spinning_enable kernel/printk/printk.c:1871 [inline]
console_emit_next_record kernel/printk/printk.c:2938 [inline]
console_flush_all+0x693/0xd00 kernel/printk/printk.c:3000
console_unlock+0xae/0x340 kernel/printk/printk.c:3069
vprintk_emit+0x477/0x600 kernel/printk/printk.c:2341
_printk+0xd0/0x110 kernel/printk/printk.c:2366
fail_dump lib/fault-inject.c:45 [inline]
should_fail_ex+0x37e/0x4d0 lib/fault-inject.c:153
strncpy_from_user+0x36/0x2e0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186
bpf_trace_copy_string kernel/bpf/helpers.c:755 [inline]
bpf_bprintf_prepare+0xb9b/0x1400 kernel/bpf/helpers.c:980
____bpf_trace_printk kernel/trace/bpf_trace.c:381 [inline]
bpf_trace_printk+0xdc/0x190 kernel/trace/bpf_trace.c:371
bpf_prog_7c77c7e0f6645ad8+0x3d/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:1223 [inline]
__bpf_prog_run include/linux/filter.h:612 [inline]
bpf_prog_run include/linux/filter.h:619 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2322 [inline]
bpf_trace_run2+0x1d1/0x3c0 kernel/trace/bpf_trace.c:2361
__bpf_trace_contention_begin+0xdd/0x130 include/trace/events/lock.h:95
trace_contention_begin+0xe9/0x110 include/trace/events/lock.h:95
__pv_queued_spin_lock_slowpath+0xe0/0x9d0 kernel/locking/qspinlock.c:405
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:586 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock+0x24e/0x2c0 kernel/locking/spinlock_debug.c:115
raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:566
raw_spin_rq_lock kernel/sched/sched.h:1372 [inline]
rq_lock kernel/sched/sched.h:1681 [inline]
__schedule+0x2dd/0x44d0 kernel/sched/core.c:6613
preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:692
find_stack lib/stackdepot.c:350 [inline]
__stack_depot_save+0x162/0x630 lib/stackdepot.c:390
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x5f/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc_lru+0x115/0x2e0 mm/slub.c:3526
__d_alloc+0x31/0x730 fs/dcache.c:1773
d_alloc fs/dcache.c:1853 [inline]
d_alloc_parallel+0xdd/0x1480 fs/dcache.c:2644
lookup_open fs/namei.c:3413 [inline]
open_last_lookups fs/namei.c:3556 [inline]
path_openat+0x907/0x3190 fs/namei.c:3786
do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
do_sys_open fs/open.c:1434 [inline]
__do_sys_open fs/open.c:1442 [inline]
__se_sys_open fs/open.c:1438 [inline]
__x64_sys_open+0x11f/0x140 fs/open.c:1438
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
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 ***
6 locks held by syz.7.711/8983:
#0: ffff888026334418 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:403
#1: ffff8880221631c8 (&inode->i_sb->s_type->i_mutex_dir_key){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#1: ffff8880221631c8 (&inode->i_sb->s_type->i_mutex_dir_key){++++}-{3:3}, at: open_last_lookups fs/namei.c:3553 [inline]
#1: ffff8880221631c8 (&inode->i_sb->s_type->i_mutex_dir_key){++++}-{3:3}, at: path_openat+0x7c6/0x3190 fs/namei.c:3786
#2: ffff8880b8e3c458 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:566
#3: ffffffff8cd2fe20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#3: ffffffff8cd2fe20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#3: ffffffff8cd2fe20 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2321 [inline]
#3: ffffffff8cd2fe20 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0xde/0x3c0 kernel/trace/bpf_trace.c:2361
#4: ffffffff8cd24160 (console_lock){+.+.}-{0:0}, at: _printk+0xd0/0x110 kernel/printk/printk.c:2366
#5: ffffffff8cc0b970 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:339 [inline]
#5: ffffffff8cc0b970 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline]
#5: ffffffff8cc0b970 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:292 [inline]
#5: ffffffff8cc0b970 (console_srcu){....}-{0:0}, at: console_flush_all+0x10f/0xd00 kernel/printk/printk.c:2992
stack backtrace:
CPU: 0 PID: 8983 Comm: syz.7.711 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
check_noncircular+0x2bd/0x3c0 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+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
console_lock_spinning_enable kernel/printk/printk.c:1871 [inline]
console_emit_next_record kernel/printk/printk.c:2938 [inline]
console_flush_all+0x693/0xd00 kernel/printk/printk.c:3000
console_unlock+0xae/0x340 kernel/printk/printk.c:3069
vprintk_emit+0x477/0x600 kernel/printk/printk.c:2341
_printk+0xd0/0x110 kernel/printk/printk.c:2366
fail_dump lib/fault-inject.c:45 [inline]
should_fail_ex+0x37e/0x4d0 lib/fault-inject.c:153
strncpy_from_user+0x36/0x2e0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186
bpf_trace_copy_string kernel/bpf/helpers.c:755 [inline]
bpf_bprintf_prepare+0xb9b/0x1400 kernel/bpf/helpers.c:980
____bpf_trace_printk kernel/trace/bpf_trace.c:381 [inline]
bpf_trace_printk+0xdc/0x190 kernel/trace/bpf_trace.c:371
bpf_prog_7c77c7e0f6645ad8+0x3d/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:1223 [inline]
__bpf_prog_run include/linux/filter.h:612 [inline]
bpf_prog_run include/linux/filter.h:619 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2322 [inline]
bpf_trace_run2+0x1d1/0x3c0 kernel/trace/bpf_trace.c:2361
__bpf_trace_contention_begin+0xdd/0x130 include/trace/events/lock.h:95
trace_contention_begin+0xe9/0x110 include/trace/events/lock.h:95
__pv_queued_spin_lock_slowpath+0xe0/0x9d0 kernel/locking/qspinlock.c:405
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:586 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock+0x24e/0x2c0 kernel/locking/spinlock_debug.c:115
raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:566
raw_spin_rq_lock kernel/sched/sched.h:1372 [inline]
rq_lock kernel/sched/sched.h:1681 [inline]
__schedule+0x2dd/0x44d0 kernel/sched/core.c:6613
preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:692
RIP: 0010:find_stack lib/stackdepot.c:351 [inline]
RIP: 0010:__stack_depot_save+0x162/0x630 lib/stackdepot.c:390
Code: cc 80 ca 12 8b 2d c2 80 ca 12 44 21 e5 4c 8b 2c ee 4d 85 ed 74 33 44 89 f0 eb 09 4d 8b 6d 00 4d 85 ed 74 25 45 39 65 08 75 f1 <45> 39 75 0c 75 eb 31 c9 48 8b 14 cb 49 3b 54 cd 18 75 de 48 ff c1
RSP: 0018:ffffc90004c27448 EFLAGS: 00000246
RAX: 000000000000000c RBX: ffffc90004c274a0 RCX: 00000000515aab40
RDX: 000000005991cae0 RSI: ffff88823b400000 RDI: 0000000000000cc0
RBP: 00000000000a91cf R08: 00000000b3da2245 R09: 000000000a9f9f0e
R10: dffffc0000000000 R11: fffffbfff1c9529e R12: 000000009ffa91cf
R13: ffff88802c698d50 R14: 000000000000000c R15: 0000000000000001
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x5f/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc_lru+0x115/0x2e0 mm/slub.c:3526
__d_alloc+0x31/0x730 fs/dcache.c:1773
d_alloc fs/dcache.c:1853 [inline]
d_alloc_parallel+0xdd/0x1480 fs/dcache.c:2644
lookup_open fs/namei.c:3413 [inline]
open_last_lookups fs/namei.c:3556 [inline]
path_openat+0x907/0x3190 fs/namei.c:3786
do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
do_sys_open fs/open.c:1434 [inline]
__do_sys_open fs/open.c:1442 [inline]
__se_sys_open fs/open.c:1438 [inline]
__x64_sys_open+0x11f/0x140 fs/open.c:1438
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc8bc18eba9
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:00007fc8bd00d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fc8bc3d6090 RCX: 00007fc8bc18eba9
RDX: 0000000000000062 RSI: 0000000000068042 RDI: 00002000000000c0
RBP: 00007fc8bd00d090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fc8bc3d6128 R14: 00007fc8bc3d6090 R15: 00007fffb0fd1ea8
CPU: 0 PID: 8983 Comm: syz.7.711 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
fail_dump lib/fault-inject.c:52 [inline]
should_fail_ex+0x39d/0x4d0 lib/fault-inject.c:153
strncpy_from_user+0x36/0x2e0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186
bpf_trace_copy_string kernel/bpf/helpers.c:755 [inline]
bpf_bprintf_prepare+0xb9b/0x1400 kernel/bpf/helpers.c:980
____bpf_trace_printk kernel/trace/bpf_trace.c:381 [inline]
bpf_trace_printk+0xdc/0x190 kernel/trace/bpf_trace.c:371
bpf_prog_7c77c7e0f6645ad8+0x3d/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:1223 [inline]
__bpf_prog_run include/linux/filter.h:612 [inline]
bpf_prog_run include/linux/filter.h:619 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2322 [inline]
bpf_trace_run2+0x1d1/0x3c0 kernel/trace/bpf_trace.c:2361
__bpf_trace_contention_begin+0xdd/0x130 include/trace/events/lock.h:95
trace_contention_begin+0xe9/0x110 include/trace/events/lock.h:95
__pv_queued_spin_lock_slowpath+0xe0/0x9d0 kernel/locking/qspinlock.c:405
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:586 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock+0x24e/0x2c0 kernel/locking/spinlock_debug.c:115
raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:566
raw_spin_rq_lock kernel/sched/sched.h:1372 [inline]
rq_lock kernel/sched/sched.h:1681 [inline]
__schedule+0x2dd/0x44d0 kernel/sched/core.c:6613
preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:692
RIP: 0010:find_stack lib/stackdepot.c:351 [inline]
RIP: 0010:__stack_depot_save+0x162/0x630 lib/stackdepot.c:390
Code: cc 80 ca 12 8b 2d c2 80 ca 12 44 21 e5 4c 8b 2c ee 4d 85 ed 74 33 44 89 f0 eb 09 4d 8b 6d 00 4d 85 ed 74 25 45 39 65 08 75 f1 <45> 39 75 0c 75 eb 31 c9 48 8b 14 cb 49 3b 54 cd 18 75 de 48 ff c1
RSP: 0018:ffffc90004c27448 EFLAGS: 00000246
RAX: 000000000000000c RBX: ffffc90004c274a0 RCX: 00000000515aab40
RDX: 000000005991cae0 RSI: ffff88823b400000 RDI: 0000000000000cc0
RBP: 00000000000a91cf R08: 00000000b3da2245 R09: 000000000a9f9f0e
R10: dffffc0000000000 R11: fffffbfff1c9529e R12: 000000009ffa91cf
R13: ffff88802c698d50 R14: 000000000000000c R15: 0000000000000001
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x5f/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc_lru+0x115/0x2e0 mm/slub.c:3526
__d_alloc+0x31/0x730 fs/dcache.c:1773
d_alloc fs/dcache.c:1853 [inline]
d_alloc_parallel+0xdd/0x1480 fs/dcache.c:2644
lookup_open fs/namei.c:3413 [inline]
open_last_lookups fs/namei.c:3556 [inline]
path_openat+0x907/0x3190 fs/namei.c:3786
do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
do_sys_open fs/open.c:1434 [inline]
__do_sys_open fs/open.c:1442 [inline]
__se_sys_open fs/open.c:1438 [inline]
__x64_sys_open+0x11f/0x140 fs/open.c:1438
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc8bc18eba9
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:00007fc8bd00d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fc8bc3d6090 RCX: 00007fc8bc18eba9
RDX: 0000000000000062 RSI: 0000000000068042 RDI: 00002000000000c0
RBP: 00007fc8bd00d090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fc8bc3d6128 R14: 00007fc8bc3d6090 R15: 00007fffb0fd1ea8
----------------
Code disassembly (best guess):
0: cc int3
1: 80 ca 12 or $0x12,%dl
4: 8b 2d c2 80 ca 12 mov 0x12ca80c2(%rip),%ebp # 0x12ca80cc
a: 44 21 e5 and %r12d,%ebp
d: 4c 8b 2c ee mov (%rsi,%rbp,8),%r13
11: 4d 85 ed test %r13,%r13
14: 74 33 je 0x49
16: 44 89 f0 mov %r14d,%eax
19: eb 09 jmp 0x24
1b: 4d 8b 6d 00 mov 0x0(%r13),%r13
1f: 4d 85 ed test %r13,%r13
22: 74 25 je 0x49
24: 45 39 65 08 cmp %r12d,0x8(%r13)
28: 75 f1 jne 0x1b
* 2a: 45 39 75 0c cmp %r14d,0xc(%r13) <-- trapping instruction
2e: 75 eb jne 0x1b
30: 31 c9 xor %ecx,%ecx
32: 48 8b 14 cb mov (%rbx,%rcx,8),%rdx
36: 49 3b 54 cd 18 cmp 0x18(%r13,%rcx,8),%rdx
3b: 75 de jne 0x1b
3d: 48 ff c1 inc %rcx