FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
======================================================
WARNING: possible circular locking dependency detected
6.8.0-syzkaller-05236-g443574b03387 #0 Not tainted
------------------------------------------------------
syz-executor.2/14388 is trying to acquire lock:
ffffffff8e125be0 (console_owner){-...}-{0:0}, at: console_trylock_spinning kernel/printk/printk.c:1951 [inline]
ffffffff8e125be0 (console_owner){-...}-{0:0}, at: vprintk_emit+0x33e/0x720 kernel/printk/printk.c:2291
but task is already holding lock:
ffff8880b953e158 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (&rq->__lock){-.-.}-{2:2}:
lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
raw_spin_rq_lock kernel/sched/sched.h:1385 [inline]
rq_lock kernel/sched/sched.h:1699 [inline]
task_fork_fair+0x61/0x1e0 kernel/sched/fair.c:12629
sched_cgroup_fork+0x37c/0x410 kernel/sched/core.c:4845
copy_process+0x2217/0x3df0 kernel/fork.c:2498
kernel_clone+0x21e/0x8d0 kernel/fork.c:2796
user_mode_thread+0x132/0x1a0 kernel/fork.c:2874
rest_init+0x27/0x300 init/main.c:695
arch_call_rest_init+0xe/0x10 init/main.c:831
start_kernel+0x47a/0x500 init/main.c:1077
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:509
x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:490
common_startup_64+0x13e/0x147
-> #3 (&p->pi_lock){-.-.}-{2:2}:
lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:553 [inline]
try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4262
__wake_up_common kernel/sched/wait.c:89 [inline]
__wake_up_common_lock+0x130/0x1e0 kernel/sched/wait.c:106
tty_port_default_wakeup+0xa6/0xf0 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x6ad/0x8a0 drivers/tty/serial/8250/8250_port.c:1835
serial8250_handle_irq+0x558/0x710 drivers/tty/serial/8250/8250_port.c:1942
serial8250_default_handle_irq+0xd1/0x1f0 drivers/tty/serial/8250/8250_port.c:1962
serial8250_interrupt+0xa9/0x1f0 drivers/tty/serial/8250/8250_core.c:127
__handle_irq_event_percpu+0x28a/0xa30 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0x89/0x1f0 kernel/irq/handle.c:210
handle_edge_irq+0x25f/0xc20 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:161 [inline]
handle_irq arch/x86/kernel/irq.c:238 [inline]
__common_interrupt+0x138/0x230 arch/x86/kernel/irq.c:257
common_interrupt+0xa5/0xd0 arch/x86/kernel/irq.c:247
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
uart_port_unlock_irqrestore include/linux/serial_core.h:667 [inline]
serial_port_runtime_resume+0x204/0x2b0 drivers/tty/serial/serial_port.c:41
__rpm_callback+0x2df/0x790 drivers/base/power/runtime.c:393
rpm_callback drivers/base/power/runtime.c:447 [inline]
rpm_resume+0x10b2/0x1af0 drivers/base/power/runtime.c:913
pm_runtime_work+0x147/0x210 drivers/base/power/runtime.c:978
process_one_work kernel/workqueue.c:3254 [inline]
process_scheduled_works+0xa00/0x1770 kernel/workqueue.c:3335
worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
-> #2 (&tty->write_wait){-.-.}-{2:2}:
lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
__wake_up_common_lock+0x25/0x1e0 kernel/sched/wait.c:105
tty_port_default_wakeup+0xa6/0xf0 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x6ad/0x8a0 drivers/tty/serial/8250/8250_port.c:1835
serial8250_handle_irq+0x558/0x710 drivers/tty/serial/8250/8250_port.c:1942
serial8250_default_handle_irq+0xd1/0x1f0 drivers/tty/serial/8250/8250_port.c:1962
serial8250_interrupt+0xa9/0x1f0 drivers/tty/serial/8250/8250_core.c:127
__handle_irq_event_percpu+0x28a/0xa30 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0x89/0x1f0 kernel/irq/handle.c:210
handle_edge_irq+0x25f/0xc20 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:161 [inline]
handle_irq arch/x86/kernel/irq.c:238 [inline]
__common_interrupt+0x138/0x230 arch/x86/kernel/irq.c:257
common_interrupt+0xa5/0xd0 arch/x86/kernel/irq.c:247
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
uart_port_unlock_irqrestore include/linux/serial_core.h:667 [inline]
serial_port_runtime_resume+0x204/0x2b0 drivers/tty/serial/serial_port.c:41
__rpm_callback+0x2df/0x790 drivers/base/power/runtime.c:393
rpm_callback drivers/base/power/runtime.c:447 [inline]
rpm_resume+0x10b2/0x1af0 drivers/base/power/runtime.c:913
pm_runtime_work+0x147/0x210 drivers/base/power/runtime.c:978
process_one_work kernel/workqueue.c:3254 [inline]
process_scheduled_works+0xa00/0x1770 kernel/workqueue.c:3335
worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
-> #1 (&port_lock_key){-.-.}-{2:2}:
lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
uart_port_lock_irqsave include/linux/serial_core.h:616 [inline]
serial8250_console_write+0x1a8/0x1840 drivers/tty/serial/8250/8250_port.c:3403
console_emit_next_record kernel/printk/printk.c:2890 [inline]
console_flush_all+0x80b/0xec0 kernel/printk/printk.c:2956
console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3025
vprintk_emit+0x509/0x720 kernel/printk/printk.c:2292
_printk+0xd5/0x120 kernel/printk/printk.c:2317
register_console+0x70a/0xcd0 kernel/printk/printk.c:3531
univ8250_console_init+0x49/0x50 drivers/tty/serial/8250/8250_core.c:717
console_init+0x198/0x680 kernel/printk/printk.c:3677
start_kernel+0x2d3/0x500 init/main.c:1012
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:509
x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:490
common_startup_64+0x13e/0x147
-> #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+0x18cb/0x58e0 kernel/locking/lockdep.c:3869
__lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
console_trylock_spinning kernel/printk/printk.c:1951 [inline]
vprintk_emit+0x35b/0x720 kernel/printk/printk.c:2291
_printk+0xd5/0x120 kernel/printk/printk.c:2317
fail_dump lib/fault-inject.c:45 [inline]
should_fail_ex+0x391/0x4e0 lib/fault-inject.c:153
strncpy_from_user+0x36/0x2f0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:216 [inline]
____bpf_probe_read_user_str kernel/trace/bpf_trace.c:225 [inline]
bpf_probe_read_user_str+0x2a/0x70 kernel/trace/bpf_trace.c:222
bpf_prog_bc7c5c6b9645592f+0x3d/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
__bpf_prog_run include/linux/filter.h:650 [inline]
bpf_prog_run include/linux/filter.h:664 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
bpf_trace_run4+0x3d7/0x490 kernel/trace/bpf_trace.c:2422
__traceiter_sched_switch+0x98/0xd0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x255d/0x4a20 kernel/sched/core.c:6733
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6915
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6939
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:12
vprintk_emit+0x66d/0x720 kernel/printk/printk.c:2293
_printk+0xd5/0x120 kernel/printk/printk.c:2317
ovs_ct_limit_set_zone_limit net/openvswitch/conntrack.c:1677 [inline]
ovs_ct_limit_cmd_set+0x9b7/0xaf0 net/openvswitch/conntrack.c:1836
genl_family_rcv_msg_doit net/netlink/genetlink.c:1113 [inline]
genl_family_rcv_msg net/netlink/genetlink.c:1193 [inline]
genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1208
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2559
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1217
netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
netlink_sendmsg+0x8e1/0xcb0 net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
___sys_sendmsg net/socket.c:2638 [inline]
__sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
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 ***
3 locks held by syz-executor.2/14388:
#0: ffffffff8f3ea5f0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1216
#1: ffff8880b953e158 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#2: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#2: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#2: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline]
#2: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x16e/0x490 kernel/trace/bpf_trace.c:2422
stack backtrace:
CPU: 1 PID: 14388 Comm: syz-executor.2 Not tainted 6.8.0-syzkaller-05236-g443574b03387 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
check_noncircular+0x36a/0x4a0 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+0x18cb/0x58e0 kernel/locking/lockdep.c:3869
__lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
console_trylock_spinning kernel/printk/printk.c:1951 [inline]
vprintk_emit+0x35b/0x720 kernel/printk/printk.c:2291
_printk+0xd5/0x120 kernel/printk/printk.c:2317
fail_dump lib/fault-inject.c:45 [inline]
should_fail_ex+0x391/0x4e0 lib/fault-inject.c:153
strncpy_from_user+0x36/0x2f0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:216 [inline]
____bpf_probe_read_user_str kernel/trace/bpf_trace.c:225 [inline]
bpf_probe_read_user_str+0x2a/0x70 kernel/trace/bpf_trace.c:222
bpf_prog_bc7c5c6b9645592f+0x3d/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
__bpf_prog_run include/linux/filter.h:650 [inline]
bpf_prog_run include/linux/filter.h:664 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
bpf_trace_run4+0x3d7/0x490 kernel/trace/bpf_trace.c:2422
__traceiter_sched_switch+0x98/0xd0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x255d/0x4a20 kernel/sched/core.c:6733
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6915
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6939
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:12
vprintk_emit+0x66d/0x720 kernel/printk/printk.c:2293
_printk+0xd5/0x120 kernel/printk/printk.c:2317
ovs_ct_limit_set_zone_limit net/openvswitch/conntrack.c:1677 [inline]
ovs_ct_limit_cmd_set+0x9b7/0xaf0 net/openvswitch/conntrack.c:1836
genl_family_rcv_msg_doit net/netlink/genetlink.c:1113 [inline]
genl_family_rcv_msg net/netlink/genetlink.c:1193 [inline]
genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1208
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2559
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1217
netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
netlink_sendmsg+0x8e1/0xcb0 net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
___sys_sendmsg net/socket.c:2638 [inline]
__sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fedd8c7dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fedd99440c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fedd8dabf80 RCX: 00007fedd8c7dea9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007fedd9944120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 000000000000000b R14: 00007fedd8dabf80 R15: 00007fffdd671278
CPU: 1 PID: 14388 Comm: syz-executor.2 Not tainted 6.8.0-syzkaller-05236-g443574b03387 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
fail_dump lib/fault-inject.c:52 [inline]
should_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:153
strncpy_from_user+0x36/0x2f0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:216 [inline]
____bpf_probe_read_user_str kernel/trace/bpf_trace.c:225 [inline]
bpf_probe_read_user_str+0x2a/0x70 kernel/trace/bpf_trace.c:222
bpf_prog_bc7c5c6b9645592f+0x3d/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
__bpf_prog_run include/linux/filter.h:650 [inline]
bpf_prog_run include/linux/filter.h:664 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
bpf_trace_run4+0x3d7/0x490 kernel/trace/bpf_trace.c:2422
__traceiter_sched_switch+0x98/0xd0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x255d/0x4a20 kernel/sched/core.c:6733
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6915
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6939
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:12
vprintk_emit+0x66d/0x720 kernel/printk/printk.c:2293
_printk+0xd5/0x120 kernel/printk/printk.c:2317
ovs_ct_limit_set_zone_limit net/openvswitch/conntrack.c:1677 [inline]
ovs_ct_limit_cmd_set+0x9b7/0xaf0 net/openvswitch/conntrack.c:1836
genl_family_rcv_msg_doit net/netlink/genetlink.c:1113 [inline]
genl_family_rcv_msg net/netlink/genetlink.c:1193 [inline]
genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1208
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2559
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1217
netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
netlink_sendmsg+0x8e1/0xcb0 net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
___sys_sendmsg net/socket.c:2638 [inline]
__sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fedd8c7dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fedd99440c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fedd8dabf80 RCX: 00007fedd8c7dea9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007fedd9944120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 000000000000000b R14: 00007fedd8dabf80 R15: 00007fffdd671278