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.3.590/8820 is trying to acquire lock:
ffffffff8df35920 (console_owner){-...}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:336 [inline]
ffffffff8df35920 (console_owner){-...}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:409 [inline]
ffffffff8df35920 (console_owner){-...}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:289 [inline]
ffffffff8df35920 (console_owner){-...}-{0:0}, at: console_flush_one_record kernel/printk/printk.c:3192 [inline]
ffffffff8df35920 (console_owner){-...}-{0:0}, at: console_flush_all+0x11a/0xb00 kernel/printk/printk.c:3289
but task is already holding lock:
ffff8880b863a918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:647
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:639
raw_spin_rq_lock kernel/sched/sched.h:1558 [inline]
task_rq_lock+0xbc/0x470 kernel/sched/core.c:739
cgroup_move_task+0x92/0x2a0 kernel/sched/psi.c:1170
css_set_move_task+0x658/0x9e0 kernel/cgroup/cgroup.c:951
cgroup_post_fork+0x1ef/0x7a0 kernel/cgroup/cgroup.c:6913
copy_process+0x3614/0x3950 kernel/fork.c:2465
kernel_clone+0x21e/0x820 kernel/fork.c:2651
user_mode_thread+0xdd/0x140 kernel/fork.c:2727
rest_init+0x23/0x300 init/main.c:722
start_kernel+0x381/0x3d0 init/main.c:1206
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x147
-> #3 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:557 [inline]
try_to_wake_up+0x67/0x12b0 kernel/sched/core.c:4106
__wake_up_common kernel/sched/wait.c:108 [inline]
__wake_up_common_lock+0x137/0x1f0 kernel/sched/wait.c:125
tty_port_default_wakeup+0xfb/0x170 drivers/tty/tty_port.c:67
serial8250_tx_chars+0x72e/0x970 drivers/tty/serial/8250/8250_port.c:1719
serial8250_handle_irq+0x633/0xbb0 drivers/tty/serial/8250/8250_port.c:1827
serial8250_default_handle_irq+0xbf/0x200 drivers/tty/serial/8250/8250_port.c:1846
serial8250_interrupt+0x8d/0x180 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x217/0x970 kernel/irq/handle.c:211
handle_irq_event_percpu kernel/irq/handle.c:248 [inline]
handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:265
handle_edge_irq+0x23b/0xa10 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:-1 [inline]
__common_interrupt+0x141/0x1f0 arch/x86/kernel/irq.c:326
common_interrupt+0xb6/0xe0 arch/x86/kernel/irq.c:319
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
spin_unlock_irq include/linux/spinlock.h:401 [inline]
__rpm_callback+0xa5/0x7f0 drivers/base/power/runtime.c:383
rpm_callback drivers/base/power/runtime.c:460 [inline]
rpm_resume+0xf9e/0x15f0 drivers/base/power/runtime.c:939
pm_runtime_work+0x103/0x1b0 drivers/base/power/runtime.c:1004
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
-> #2 (&tty->write_wait){-.-.}-{3:3}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162
__wake_up_common_lock+0x2f/0x1f0 kernel/sched/wait.c:124
tty_port_default_wakeup+0xfb/0x170 drivers/tty/tty_port.c:67
serial8250_tx_chars+0x72e/0x970 drivers/tty/serial/8250/8250_port.c:1719
serial8250_handle_irq+0x633/0xbb0 drivers/tty/serial/8250/8250_port.c:1827
serial8250_default_handle_irq+0xbf/0x200 drivers/tty/serial/8250/8250_port.c:1846
serial8250_interrupt+0x8d/0x180 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x217/0x970 kernel/irq/handle.c:211
handle_irq_event_percpu kernel/irq/handle.c:248 [inline]
handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:265
handle_edge_irq+0x23b/0xa10 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:-1 [inline]
__common_interrupt+0x141/0x1f0 arch/x86/kernel/irq.c:326
common_interrupt+0xb6/0xe0 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:152 [inline]
_raw_spin_unlock_irqrestore+0x47/0x80 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+0x111/0x2f0 drivers/tty/serial/serial_core.c:91
uart_write+0xe8/0x130 drivers/tty/serial/serial_core.c:634
process_output_block drivers/tty/n_tty.c:557 [inline]
n_tty_write+0xd78/0x12a0 drivers/tty/n_tty.c:2366
iterate_tty_write drivers/tty/tty_io.c:1006 [inline]
file_tty_write+0x559/0xa20 drivers/tty/tty_io.c:1081
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/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+0x40/0x60 kernel/locking/spinlock.c:162
uart_port_lock_irqsave include/linux/serial_core.h:717 [inline]
serial8250_console_write+0x155/0x1b60 drivers/tty/serial/8250/8250_port.c:3301
console_emit_next_record kernel/printk/printk.c:3129 [inline]
console_flush_one_record kernel/printk/printk.c:3215 [inline]
console_flush_all+0x713/0xb00 kernel/printk/printk.c:3289
__console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
console_unlock+0xbb/0x190 kernel/printk/printk.c:3359
vprintk_emit+0x47b/0x550 kernel/printk/printk.c:2426
_printk+0xcf/0x120 kernel/printk/printk.c:2451
register_console+0xa8b/0xf90 kernel/printk/printk.c:4170
univ8250_console_init+0x3a/0x70 drivers/tty/serial/8250/8250_core.c:515
console_init+0xfc/0x3f0 kernel/printk/printk.c:4369
start_kernel+0x227/0x3d0 init/main.c:1143
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x147
-> #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+0x15a6/0x2cf0 kernel/locking/lockdep.c:5237
lock_acquire+0x107/0x340 kernel/locking/lockdep.c:5868
console_lock_spinning_enable kernel/printk/printk.c:1900 [inline]
console_emit_next_record kernel/printk/printk.c:3123 [inline]
console_flush_one_record kernel/printk/printk.c:3215 [inline]
console_flush_all+0x6bc/0xb00 kernel/printk/printk.c:3289
__console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
console_unlock+0xbb/0x190 kernel/printk/printk.c:3359
vprintk_emit+0x47b/0x550 kernel/printk/printk.c:2426
_printk+0xcf/0x120 kernel/printk/printk.c:2451
fail_dump lib/fault-inject.c:66 [inline]
should_fail_ex+0x3f5/0x560 lib/fault-inject.c:174
strncpy_from_user+0x36/0x2c0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x72/0x150 mm/maccess.c:192
bpf_trace_copy_string kernel/bpf/helpers.c:755 [inline]
bpf_bprintf_prepare+0xbbc/0x13d0 kernel/bpf/helpers.c:976
____bpf_trace_printk kernel/trace/bpf_trace.c:372 [inline]
bpf_trace_printk+0xdb/0x190 kernel/trace/bpf_trace.c:362
bpf_prog_930ede9872f2967c+0x3e/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1378 [inline]
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run include/linux/filter.h:730 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline]
bpf_trace_run2+0x284/0x4c0 kernel/trace/bpf_trace.c:2116
__bpf_trace_contention_begin+0xdc/0x130 include/trace/events/lock.h:95
__do_trace_contention_begin include/trace/events/lock.h:95 [inline]
trace_contention_begin+0xfe/0x120 include/trace/events/lock.h:95
__pv_queued_spin_lock_slowpath+0xf0/0xb60 kernel/locking/qspinlock.c:219
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [inline]
queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock+0x21f/0x290 kernel/locking/spinlock_debug.c:116
raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:647
raw_spin_rq_lock kernel/sched/sched.h:1558 [inline]
rq_lock kernel/sched/sched.h:1885 [inline]
__schedule+0x3c4/0x4fd0 kernel/sched/core.c:6768
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7190
irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
__rht_ptr_rcu include/linux/rhashtable.h:390 [inline]
__rhashtable_lookup include/linux/rhashtable.h:631 [inline]
rhashtable_lookup include/linux/rhashtable.h:670 [inline]
rhashtable_lookup_fast include/linux/rhashtable.h:707 [inline]
__netlink_lookup+0x331/0x8a0 net/netlink/af_netlink.c:498
netlink_autobind+0x189/0x300 net/netlink/af_netlink.c:813
netlink_sendmsg+0x523/0xb30 net/netlink/af_netlink.c:1857
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:742
____sys_sendmsg+0x505/0x820 net/socket.c:2592
___sys_sendmsg+0x21f/0x2a0 net/socket.c:2646
__sys_sendmsg net/socket.c:2678 [inline]
__do_sys_sendmsg net/socket.c:2683 [inline]
__se_sys_sendmsg net/socket.c:2681 [inline]
__x64_sys_sendmsg+0x19b/0x260 net/socket.c:2681
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 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 ***
6 locks held by syz.3.590/8820:
#0: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: netlink_autobind+0xdb/0x300 net/netlink/af_netlink.c:812
#1: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#1: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#1: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: rhashtable_lookup_fast include/linux/rhashtable.h:706 [inline]
#1: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: __netlink_lookup+0xbd/0x8a0 net/netlink/af_netlink.c:498
#2: ffff8880b863a918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:647
#3: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#3: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#3: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2074 [inline]
#3: ffffffff8df41aa0 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run2+0x186/0x4c0 kernel/trace/bpf_trace.c:2116
#4: ffffffff8df35980 (console_lock){+.+.}-{0:0}, at: _printk+0xcf/0x120 kernel/printk/printk.c:2451
#5: ffffffff8de1d238 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:336 [inline]
#5: ffffffff8de1d238 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:409 [inline]
#5: ffffffff8de1d238 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:289 [inline]
#5: ffffffff8de1d238 (console_srcu){....}-{0:0}, at: console_flush_one_record kernel/printk/printk.c:3192 [inline]
#5: ffffffff8de1d238 (console_srcu){....}-{0:0}, at: console_flush_all+0x11a/0xb00 kernel/printk/printk.c:3289
stack backtrace:
CPU: 0 UID: 0 PID: 8820 Comm: syz.3.590 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2043
check_noncircular+0x12e/0x150 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+0x15a6/0x2cf0 kernel/locking/lockdep.c:5237
lock_acquire+0x107/0x340 kernel/locking/lockdep.c:5868
console_lock_spinning_enable kernel/printk/printk.c:1900 [inline]
console_emit_next_record kernel/printk/printk.c:3123 [inline]
console_flush_one_record kernel/printk/printk.c:3215 [inline]
console_flush_all+0x6bc/0xb00 kernel/printk/printk.c:3289
__console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
console_unlock+0xbb/0x190 kernel/printk/printk.c:3359
vprintk_emit+0x47b/0x550 kernel/printk/printk.c:2426
_printk+0xcf/0x120 kernel/printk/printk.c:2451
fail_dump lib/fault-inject.c:66 [inline]
should_fail_ex+0x3f5/0x560 lib/fault-inject.c:174
strncpy_from_user+0x36/0x2c0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x72/0x150 mm/maccess.c:192
bpf_trace_copy_string kernel/bpf/helpers.c:755 [inline]
bpf_bprintf_prepare+0xbbc/0x13d0 kernel/bpf/helpers.c:976
____bpf_trace_printk kernel/trace/bpf_trace.c:372 [inline]
bpf_trace_printk+0xdb/0x190 kernel/trace/bpf_trace.c:362
bpf_prog_930ede9872f2967c+0x3e/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1378 [inline]
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run include/linux/filter.h:730 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline]
bpf_trace_run2+0x284/0x4c0 kernel/trace/bpf_trace.c:2116
__bpf_trace_contention_begin+0xdc/0x130 include/trace/events/lock.h:95
__do_trace_contention_begin include/trace/events/lock.h:95 [inline]
trace_contention_begin+0xfe/0x120 include/trace/events/lock.h:95
__pv_queued_spin_lock_slowpath+0xf0/0xb60 kernel/locking/qspinlock.c:219
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [inline]
queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock+0x21f/0x290 kernel/locking/spinlock_debug.c:116
raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:647
raw_spin_rq_lock kernel/sched/sched.h:1558 [inline]
rq_lock kernel/sched/sched.h:1885 [inline]
__schedule+0x3c4/0x4fd0 kernel/sched/core.c:6768
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7190
irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__rht_ptr_rcu include/linux/rhashtable.h:390 [inline]
RIP: 0010:__rhashtable_lookup include/linux/rhashtable.h:631 [inline]
RIP: 0010:rhashtable_lookup include/linux/rhashtable.h:670 [inline]
RIP: 0010:rhashtable_lookup_fast include/linux/rhashtable.h:707 [inline]
RIP: 0010:__netlink_lookup+0x331/0x8a0 net/netlink/af_netlink.c:498
Code: 74 24 28 0f 84 84 02 00 00 e8 bb 02 49 f8 48 8b 5c 24 50 48 8b 44 24 58 42 80 3c 20 00 74 08 48 89 df e8 82 25 af f8 4c 8b 33 3a 40 e2 01 41 89 c7 31 ff 89 c6 e8 ce 06 49 f8 45 85 ff 74 21
RSP: 0018:ffffc9000b2d7780 EFLAGS: 00000246
RAX: 1ffff1100f26429e RBX: ffff8880793214f0 RCX: ffff888079321400
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000b2d7868 R08: ffffffff8977f3dd R09: ffffffff8df41aa0
R10: dffffc0000000000 R11: fffff5200165af02 R12: dffffc0000000000
R13: 00000000b4c73e31 R14: 0000000000000000 R15: 00000000ba9766b5
netlink_autobind+0x189/0x300 net/netlink/af_netlink.c:813
netlink_sendmsg+0x523/0xb30 net/netlink/af_netlink.c:1857
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:742
____sys_sendmsg+0x505/0x820 net/socket.c:2592
___sys_sendmsg+0x21f/0x2a0 net/socket.c:2646
__sys_sendmsg net/socket.c:2678 [inline]
__do_sys_sendmsg net/socket.c:2683 [inline]
__se_sys_sendmsg net/socket.c:2681 [inline]
__x64_sys_sendmsg+0x19b/0x260 net/socket.c:2681
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd133b8f749
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:00007fd134a3b038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd133de5fa0 RCX: 00007fd133b8f749
RDX: 0000000000000000 RSI: 0000200000000280 RDI: 0000000000000003
RBP: 00007fd134a3b090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fd133de6038 R14: 00007fd133de5fa0 R15: 00007ffe259bd928
CPU: 0 UID: 0 PID: 8820 Comm: syz.3.590 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
fail_dump lib/fault-inject.c:73 [inline]
should_fail_ex+0x414/0x560 lib/fault-inject.c:174
strncpy_from_user+0x36/0x2c0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x72/0x150 mm/maccess.c:192
bpf_trace_copy_string kernel/bpf/helpers.c:755 [inline]
bpf_bprintf_prepare+0xbbc/0x13d0 kernel/bpf/helpers.c:976
____bpf_trace_printk kernel/trace/bpf_trace.c:372 [inline]
bpf_trace_printk+0xdb/0x190 kernel/trace/bpf_trace.c:362
bpf_prog_930ede9872f2967c+0x3e/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1378 [inline]
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run include/linux/filter.h:730 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline]
bpf_trace_run2+0x284/0x4c0 kernel/trace/bpf_trace.c:2116
__bpf_trace_contention_begin+0xdc/0x130 include/trace/events/lock.h:95
__do_trace_contention_begin include/trace/events/lock.h:95 [inline]
trace_contention_begin+0xfe/0x120 include/trace/events/lock.h:95
__pv_queued_spin_lock_slowpath+0xf0/0xb60 kernel/locking/qspinlock.c:219
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [inline]
queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock+0x21f/0x290 kernel/locking/spinlock_debug.c:116
raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:647
raw_spin_rq_lock kernel/sched/sched.h:1558 [inline]
rq_lock kernel/sched/sched.h:1885 [inline]
__schedule+0x3c4/0x4fd0 kernel/sched/core.c:6768
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7190
irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__rht_ptr_rcu include/linux/rhashtable.h:390 [inline]
RIP: 0010:__rhashtable_lookup include/linux/rhashtable.h:631 [inline]
RIP: 0010:rhashtable_lookup include/linux/rhashtable.h:670 [inline]
RIP: 0010:rhashtable_lookup_fast include/linux/rhashtable.h:707 [inline]
RIP: 0010:__netlink_lookup+0x331/0x8a0 net/netlink/af_netlink.c:498
Code: 74 24 28 0f 84 84 02 00 00 e8 bb 02 49 f8 48 8b 5c 24 50 48 8b 44 24 58 42 80 3c 20 00 74 08 48 89 df e8 82 25 af f8 4c 8b 33 3a 40 e2 01 41 89 c7 31 ff 89 c6 e8 ce 06 49 f8 45 85 ff 74 21
RSP: 0018:ffffc9000b2d7780 EFLAGS: 00000246
RAX: 1ffff1100f26429e RBX: ffff8880793214f0 RCX: ffff888079321400
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000b2d7868 R08: ffffffff8977f3dd R09: ffffffff8df41aa0
R10: dffffc0000000000 R11: fffff5200165af02 R12: dffffc0000000000
R13: 00000000b4c73e31 R14: 0000000000000000 R15: 00000000ba9766b5
netlink_autobind+0x189/0x300 net/netlink/af_netlink.c:813
netlink_sendmsg+0x523/0xb30 net/netlink/af_netlink.c:1857
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:742
____sys_sendmsg+0x505/0x820 net/socket.c:2592
___sys_sendmsg+0x21f/0x2a0 net/socket.c:2646
__sys_sendmsg net/socket.c:2678 [inline]
__do_sys_sendmsg net/socket.c:2683 [inline]
__se_sys_sendmsg net/socket.c:2681 [inline]
__x64_sys_sendmsg+0x19b/0x260 net/socket.c:2681
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd133b8f749
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:00007fd134a3b038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd133de5fa0 RCX: 00007fd133b8f749
RDX: 0000000000000000 RSI: 0000200000000280 RDI: 0000000000000003
RBP: 00007fd134a3b090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fd133de6038 R14: 00007fd133de5fa0 R15: 00007ffe259bd928
netlink: 12 bytes leftover after parsing attributes in process `syz.3.590'.
netdevsim netdevsim3 netdevsim0: entered allmulticast mode
----------------
Code disassembly (best guess):
0: 74 24 je 0x26
2: 28 0f sub %cl,(%rdi)
4: 84 84 02 00 00 e8 bb test %al,-0x44180000(%rdx,%rax,1)
b: 02 49 f8 add -0x8(%rcx),%cl
e: 48 8b 5c 24 50 mov 0x50(%rsp),%rbx
13: 48 8b 44 24 58 mov 0x58(%rsp),%rax
18: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
1d: 74 08 je 0x27
1f: 48 89 df mov %rbx,%rdi
22: e8 82 25 af f8 call 0xf8af25a9
27: 4c 8b 33 mov (%rbx),%r14
* 2a: e8 3a 40 e2 01 call 0x1e24069 <-- trapping instruction
2f: 41 89 c7 mov %eax,%r15d
32: 31 ff xor %edi,%edi
34: 89 c6 mov %eax,%esi
36: e8 ce 06 49 f8 call 0xf8490709
3b: 45 85 ff test %r15d,%r15d
3e: 74 21 je 0x61