FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
======================================================
WARNING: possible circular locking dependency detected
6.16.0-syzkaller-11129-geacf91b0c78a #0 Not tainted
------------------------------------------------------
syz.4.2974/18141 is trying to acquire lock:
ffffffff8e4ce740 (console_owner){-.-.}-{0:0}, at: console_lock_spinning_enable+0x9f/0xd0 kernel/printk/printk.c:1924
but task is already holding lock:
ffff8880b843a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:644 [inline]
ffff8880b843a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:629
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:636
raw_spin_rq_lock kernel/sched/sched.h:1519 [inline]
task_rq_lock+0xcf/0x490 kernel/sched/core.c:736
cgroup_move_task+0x81/0x2a0 kernel/sched/psi.c:1174
css_set_move_task+0x288/0x5f0 kernel/cgroup/cgroup.c:918
cgroup_post_fork+0x201/0x9e0 kernel/cgroup/cgroup.c:6759
copy_process+0x5cfa/0x7690 kernel/fork.c:2417
kernel_clone+0xfc/0x930 kernel/fork.c:2603
user_mode_thread+0xc7/0x110 kernel/fork.c:2681
rest_init+0x23/0x2b0 init/main.c:709
start_kernel+0x3ee/0x4d0 init/main.c:1097
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:307
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:288
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+0xb7/0x1870 kernel/sched/core.c:4216
__wake_up_common+0x132/0x1f0 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+0x2a/0x40 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1728
serial8250_handle_irq+0x761/0xcb0 drivers/tty/serial/8250/8250_port.c:1836
serial8250_default_handle_irq+0x9a/0x250 drivers/tty/serial/8250/8250_port.c:1856
serial8250_interrupt+0xf5/0x1b0 drivers/tty/serial/8250/8250_core.c:82
__handle_irq_event_percpu+0x22c/0x7d0 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x3ca/0x9e0 kernel/irq/chip.c:855
generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
handle_irq arch/x86/kernel/irq.c:254 [inline]
call_irq_handler arch/x86/kernel/irq.c:266 [inline]
__common_interrupt+0xdf/0x250 arch/x86/kernel/irq.c:292
common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:285
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
__sanitizer_cov_trace_const_cmp4+0xa/0x20 kernel/kcov.c:314
mas_wr_node_walk lib/maple_tree.c:2214 [inline]
mas_wr_walk_descend lib/maple_tree.c:3522 [inline]
mas_wr_walk lib/maple_tree.c:3547 [inline]
mas_wr_store_type+0x153/0x21d0 lib/maple_tree.c:4241
mas_store+0x62f/0x1160 lib/maple_tree.c:5428
vma_iter_bulk_store include/linux/mm.h:901 [inline]
dup_mmap+0xafd/0x21d0 mm/mmap.c:1810
dup_mm kernel/fork.c:1483 [inline]
copy_mm kernel/fork.c:1535 [inline]
copy_process+0x4081/0x7690 kernel/fork.c:2173
kernel_clone+0xfc/0x930 kernel/fork.c:2603
__do_sys_clone+0xce/0x120 kernel/fork.c:2746
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #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+0x2a/0x40 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1728
serial8250_handle_irq+0x761/0xcb0 drivers/tty/serial/8250/8250_port.c:1836
serial8250_default_handle_irq+0x9a/0x250 drivers/tty/serial/8250/8250_port.c:1856
serial8250_interrupt+0xf5/0x1b0 drivers/tty/serial/8250/8250_core.c:82
__handle_irq_event_percpu+0x22c/0x7d0 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x3ca/0x9e0 kernel/irq/chip.c:855
generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
handle_irq arch/x86/kernel/irq.c:254 [inline]
call_irq_handler arch/x86/kernel/irq.c:266 [inline]
__common_interrupt+0xdf/0x250 arch/x86/kernel/irq.c:292
common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:285
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
__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:637
process_output_block drivers/tty/n_tty.c:561 [inline]
n_tty_write+0x41f/0x11e0 drivers/tty/n_tty.c:2377
iterate_tty_write drivers/tty/tty_io.c:1006 [inline]
file_tty_write.constprop.0+0x501/0x9b0 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+0xd4/0x150 drivers/tty/tty_io.c:1105
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x6c4/0x1150 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/0x4c0 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:3355
console_emit_next_record kernel/printk/printk.c:3138 [inline]
console_flush_all+0x801/0xc60 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
_printk+0xc7/0x100 kernel/printk/printk.c:2475
register_console+0xc2d/0x11b0 kernel/printk/printk.c:4125
univ8250_console_init+0x5f/0x90 drivers/tty/serial/8250/8250_core.c:516
console_init+0x14f/0x680 kernel/printk/printk.c:4323
start_kernel+0x29f/0x4d0 init/main.c:1035
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:307
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:288
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+0x12a6/0x1ce0 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
console_lock_spinning_enable+0xb0/0xd0 kernel/printk/printk.c:1924
console_emit_next_record kernel/printk/printk.c:3132 [inline]
console_flush_all+0x7aa/0xc60 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
_printk+0xc7/0x100 kernel/printk/printk.c:2475
fail_dump lib/fault-inject.c:66 [inline]
should_fail_ex+0x4e7/0x640 lib/fault-inject.c:174
strncpy_from_user+0x3b/0x2e0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x7f/0x180 mm/maccess.c:192
bpf_trace_copy_string kernel/bpf/helpers.c:761 [inline]
bpf_bprintf_prepare+0xe90/0x13f0 kernel/bpf/helpers.c:976
____bpf_trace_printk kernel/trace/bpf_trace.c:373 [inline]
bpf_trace_printk+0xda/0x190 kernel/trace/bpf_trace.c:363
bpf_prog_7c77c7e0f6645ad8+0x3e/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1332 [inline]
__bpf_prog_run include/linux/filter.h:718 [inline]
bpf_prog_run include/linux/filter.h:725 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2257 [inline]
bpf_trace_run2+0x236/0x590 kernel/trace/bpf_trace.c:2298
__bpf_trace_contention_begin+0xc9/0x110 include/trace/events/lock.h:95
__preempt_count_dec_and_test arch/x86/include/asm/preempt.h:95 [inline]
class_preempt_notrace_destructor include/linux/preempt.h:473 [inline]
__do_trace_contention_begin include/trace/events/lock.h:95 [inline]
trace_contention_begin.constprop.0+0xde/0x160 include/trace/events/lock.h:95
__pv_queued_spin_lock_slowpath+0x109/0xcf0 kernel/locking/qspinlock.c:219
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [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+0x20e/0x2b0 kernel/locking/spinlock_debug.c:116
raw_spin_rq_lock_nested kernel/sched/core.c:644 [inline]
raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:629
raw_spin_rq_lock kernel/sched/sched.h:1519 [inline]
rq_lock kernel/sched/sched.h:1841 [inline]
__schedule+0x307/0x5de0 kernel/sched/core.c:6865
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7288
irqentry_exit+0x36/0x90 kernel/entry/common.c:197
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
copy_iovec_from_user+0x10f/0x170 lib/iov_iter.c:1378
__import_iovec_ubuf lib/iov_iter.c:1437 [inline]
__import_iovec+0x44e/0x650 lib/iov_iter.c:1456
import_iovec+0x109/0x140 lib/iov_iter.c:1523
copy_msghdr_from_user+0xf9/0x160 net/socket.c:2551
sendmsg_copy_msghdr net/socket.c:2645 [inline]
___sys_sendmsg+0xfe/0x1d0 net/socket.c:2664
__sys_sendmsg+0x16d/0x220 net/socket.c:2700
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
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.4.2974/18141:
#0: ffff8880b843a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:644 [inline]
#0: ffff8880b843a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:629
#1: ffffffff8e5c1120 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#1: ffffffff8e5c1120 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#1: ffffffff8e5c1120 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2256 [inline]
#1: ffffffff8e5c1120 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run2+0x1bc/0x590 kernel/trace/bpf_trace.c:2298
#2: ffffffff8e5aeb80 (console_lock){+.+.}-{0:0}, at: _printk+0xc7/0x100 kernel/printk/printk.c:2475
#3: ffffffff8e5aebf0 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:336 [inline]
#3: ffffffff8e5aebf0 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:319 [inline]
#3: ffffffff8e5aebf0 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:288 [inline]
#3: ffffffff8e5aebf0 (console_srcu){....}-{0:0}, at: console_flush_all+0x158/0xc60 kernel/printk/printk.c:3203
stack backtrace:
CPU: 0 UID: 0 PID: 18141 Comm: syz.4.2974 Not tainted 6.16.0-syzkaller-11129-geacf91b0c78a #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2043
check_noncircular+0x14c/0x170 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+0x12a6/0x1ce0 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
console_lock_spinning_enable+0xb0/0xd0 kernel/printk/printk.c:1924
console_emit_next_record kernel/printk/printk.c:3132 [inline]
console_flush_all+0x7aa/0xc60 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
_printk+0xc7/0x100 kernel/printk/printk.c:2475
fail_dump lib/fault-inject.c:66 [inline]
should_fail_ex+0x4e7/0x640 lib/fault-inject.c:174
strncpy_from_user+0x3b/0x2e0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x7f/0x180 mm/maccess.c:192
bpf_trace_copy_string kernel/bpf/helpers.c:761 [inline]
bpf_bprintf_prepare+0xe90/0x13f0 kernel/bpf/helpers.c:976
____bpf_trace_printk kernel/trace/bpf_trace.c:373 [inline]
bpf_trace_printk+0xda/0x190 kernel/trace/bpf_trace.c:363
bpf_prog_7c77c7e0f6645ad8+0x3e/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1332 [inline]
__bpf_prog_run include/linux/filter.h:718 [inline]
bpf_prog_run include/linux/filter.h:725 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2257 [inline]
bpf_trace_run2+0x236/0x590 kernel/trace/bpf_trace.c:2298
__bpf_trace_contention_begin+0xc9/0x110 include/trace/events/lock.h:95
__preempt_count_dec_and_test arch/x86/include/asm/preempt.h:95 [inline]
class_preempt_notrace_destructor include/linux/preempt.h:473 [inline]
__do_trace_contention_begin include/trace/events/lock.h:95 [inline]
trace_contention_begin.constprop.0+0xde/0x160 include/trace/events/lock.h:95
__pv_queued_spin_lock_slowpath+0x109/0xcf0 kernel/locking/qspinlock.c:219
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [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+0x20e/0x2b0 kernel/locking/spinlock_debug.c:116
raw_spin_rq_lock_nested kernel/sched/core.c:644 [inline]
raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:629
raw_spin_rq_lock kernel/sched/sched.h:1519 [inline]
rq_lock kernel/sched/sched.h:1841 [inline]
__schedule+0x307/0x5de0 kernel/sched/core.c:6865
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7288
irqentry_exit+0x36/0x90 kernel/entry/common.c:197
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:copy_iovec_from_user+0x10f/0x170 lib/iov_iter.c:1379
Code: 48 8b 04 24 49 8d 7c 24 08 49 89 04 24 48 89 f8 48 c1 e8 03 42 80 3c 38 00 75 5b 4d 89 74 24 08 49 83 ed 01 31 ff 48 83 c5 10 <4c> 89 ee 49 83 c4 10 e8 65 4e db fc 4d 85 ed 0f 85 59 ff ff ff e8
RSP: 0018:ffffc9001a2ffa30 EFLAGS: 00040206
RAX: 1ffff9200345ff8d RBX: 0000000000000000 RCX: ffffffff84e03539
RDX: ffff88804f3ec880 RSI: ffffffff84e03547 RDI: 0000000000000000
RBP: 0000200000000150 R08: 0000000000000007 R09: 0000000000000000
R10: 000000000000003c R11: 0000000000000000 R12: ffffc9001a2ffc60
R13: 0000000000000000 R14: 000000000000003c R15: dffffc0000000000
__import_iovec_ubuf lib/iov_iter.c:1437 [inline]
__import_iovec+0x44e/0x650 lib/iov_iter.c:1456
import_iovec+0x109/0x140 lib/iov_iter.c:1523
copy_msghdr_from_user+0xf9/0x160 net/socket.c:2551
sendmsg_copy_msghdr net/socket.c:2645 [inline]
___sys_sendmsg+0xfe/0x1d0 net/socket.c:2664
__sys_sendmsg+0x16d/0x220 net/socket.c:2700
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f190278eb69
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:00007f1903635038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f19029b5fa0 RCX: 00007f190278eb69
RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003
RBP: 00007f1903635090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f19029b5fa0 R15: 00007ffec0ec6ce8
CPU: 0 UID: 0 PID: 18141 Comm: syz.4.2974 Not tainted 6.16.0-syzkaller-11129-geacf91b0c78a #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
fail_dump lib/fault-inject.c:73 [inline]
should_fail_ex+0x512/0x640 lib/fault-inject.c:174
strncpy_from_user+0x3b/0x2e0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x7f/0x180 mm/maccess.c:192
bpf_trace_copy_string kernel/bpf/helpers.c:761 [inline]
bpf_bprintf_prepare+0xe90/0x13f0 kernel/bpf/helpers.c:976
____bpf_trace_printk kernel/trace/bpf_trace.c:373 [inline]
bpf_trace_printk+0xda/0x190 kernel/trace/bpf_trace.c:363
bpf_prog_7c77c7e0f6645ad8+0x3e/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1332 [inline]
__bpf_prog_run include/linux/filter.h:718 [inline]
bpf_prog_run include/linux/filter.h:725 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2257 [inline]
bpf_trace_run2+0x236/0x590 kernel/trace/bpf_trace.c:2298
__bpf_trace_contention_begin+0xc9/0x110 include/trace/events/lock.h:95
__preempt_count_dec_and_test arch/x86/include/asm/preempt.h:95 [inline]
class_preempt_notrace_destructor include/linux/preempt.h:473 [inline]
__do_trace_contention_begin include/trace/events/lock.h:95 [inline]
trace_contention_begin.constprop.0+0xde/0x160 include/trace/events/lock.h:95
__pv_queued_spin_lock_slowpath+0x109/0xcf0 kernel/locking/qspinlock.c:219
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [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+0x20e/0x2b0 kernel/locking/spinlock_debug.c:116
raw_spin_rq_lock_nested kernel/sched/core.c:644 [inline]
raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:629
raw_spin_rq_lock kernel/sched/sched.h:1519 [inline]
rq_lock kernel/sched/sched.h:1841 [inline]
__schedule+0x307/0x5de0 kernel/sched/core.c:6865
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7288
irqentry_exit+0x36/0x90 kernel/entry/common.c:197
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:copy_iovec_from_user+0x10f/0x170 lib/iov_iter.c:1379
Code: 48 8b 04 24 49 8d 7c 24 08 49 89 04 24 48 89 f8 48 c1 e8 03 42 80 3c 38 00 75 5b 4d 89 74 24 08 49 83 ed 01 31 ff 48 83 c5 10 <4c> 89 ee 49 83 c4 10 e8 65 4e db fc 4d 85 ed 0f 85 59 ff ff ff e8
RSP: 0018:ffffc9001a2ffa30 EFLAGS: 00040206
RAX: 1ffff9200345ff8d RBX: 0000000000000000 RCX: ffffffff84e03539
RDX: ffff88804f3ec880 RSI: ffffffff84e03547 RDI: 0000000000000000
RBP: 0000200000000150 R08: 0000000000000007 R09: 0000000000000000
R10: 000000000000003c R11: 0000000000000000 R12: ffffc9001a2ffc60
R13: 0000000000000000 R14: 000000000000003c R15: dffffc0000000000
__import_iovec_ubuf lib/iov_iter.c:1437 [inline]
__import_iovec+0x44e/0x650 lib/iov_iter.c:1456
import_iovec+0x109/0x140 lib/iov_iter.c:1523
copy_msghdr_from_user+0xf9/0x160 net/socket.c:2551
sendmsg_copy_msghdr net/socket.c:2645 [inline]
___sys_sendmsg+0xfe/0x1d0 net/socket.c:2664
__sys_sendmsg+0x16d/0x220 net/socket.c:2700
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f190278eb69
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:00007f1903635038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f19029b5fa0 RCX: 00007f190278eb69
RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003
RBP: 00007f1903635090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f19029b5fa0 R15: 00007ffec0ec6ce8
vlan0: entered promiscuous mode
----------------
Code disassembly (best guess):
0: 48 8b 04 24 mov (%rsp),%rax
4: 49 8d 7c 24 08 lea 0x8(%r12),%rdi
9: 49 89 04 24 mov %rax,(%r12)
d: 48 89 f8 mov %rdi,%rax
10: 48 c1 e8 03 shr $0x3,%rax
14: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
19: 75 5b jne 0x76
1b: 4d 89 74 24 08 mov %r14,0x8(%r12)
20: 49 83 ed 01 sub $0x1,%r13
24: 31 ff xor %edi,%edi
26: 48 83 c5 10 add $0x10,%rbp
* 2a: 4c 89 ee mov %r13,%rsi <-- trapping instruction
2d: 49 83 c4 10 add $0x10,%r12
31: e8 65 4e db fc call 0xfcdb4e9b
36: 4d 85 ed test %r13,%r13
39: 0f 85 59 ff ff ff jne 0xffffff98
3f: e8 .byte 0xe8