FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
======================================================
WARNING: possible circular locking dependency detected
6.1.129-syzkaller #0 Not tainted
------------------------------------------------------
syz.1.408/6154 is trying to acquire lock:
ffffffff8d20a538 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0x1c/0xa0 kernel/locking/semaphore.c:139
but task is already holding lock:
ffff8880b8f3a9d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&rq->__lock){-.-.}-{2:2}:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
_raw_spin_lock_nested+0x2d/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
raw_spin_rq_lock kernel/sched/sched.h:1355 [inline]
rq_lock kernel/sched/sched.h:1645 [inline]
task_fork_fair+0x5d/0x350 kernel/sched/fair.c:11886
sched_cgroup_fork+0x374/0x400 kernel/sched/core.c:4684
copy_process+0x2482/0x40a0 kernel/fork.c:2383
kernel_clone+0x222/0x920 kernel/fork.c:2681
user_mode_thread+0x140/0x1b0 kernel/fork.c:2757
rest_init+0x23/0x300 init/main.c:698
start_kernel+0x0/0x53f init/main.c:893
start_kernel+0x496/0x53f init/main.c:1140
secondary_startup_64_no_verify+0xcf/0xdb
-> #1 (&p->pi_lock){-.-.}-{2:2}:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
try_to_wake_up+0xad/0x1250 kernel/sched/core.c:4110
up+0x6e/0x90 kernel/locking/semaphore.c:191
__up_console_sem+0x11a/0x1e0 kernel/printk/printk.c:260
__console_unlock kernel/printk/printk.c:2697 [inline]
console_unlock+0x591/0x7c0 kernel/printk/printk.c:2908
vprintk_emit+0x523/0x740 kernel/printk/printk.c:2303
_printk+0xd1/0x111 kernel/printk/printk.c:2328
__dev_set_promiscuity+0x1df/0x5d0 net/core/dev.c:8387
__dev_set_rx_mode+0x19d/0x280
dev_uc_del+0xbe/0x100 net/core/dev_addr_lists.c:714
macvlan_stop+0x27f/0x420 drivers/net/macvlan.c:698
__dev_close_many+0x202/0x2e0 net/core/dev.c:1541
dev_close_many+0x247/0x4b0 net/core/dev.c:1566
unregister_netdevice_many+0x4f7/0x1710 net/core/dev.c:10921
default_device_exit_batch+0x98d/0xa20 net/core/dev.c:11460
ops_exit_list net/core/net_namespace.c:177 [inline]
cleanup_net+0x886/0xd20 net/core/net_namespace.c:640
process_one_work+0x917/0x1260 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
-> #0 ((console_sem).lock){-.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
down_trylock+0x1c/0xa0 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x105/0x250 kernel/printk/printk.c:243
console_trylock kernel/printk/printk.c:2650 [inline]
console_trylock_spinning kernel/printk/printk.c:1896 [inline]
vprintk_emit+0x1ee/0x740 kernel/printk/printk.c:2302
_printk+0xd1/0x111 kernel/printk/printk.c:2328
fail_dump lib/fault-inject.c:45 [inline]
should_fail_ex+0x387/0x4d0 lib/fault-inject.c:147
strncpy_from_user+0x32/0x360 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x6c/0x130 mm/maccess.c:186
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:204 [inline]
____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:310 [inline]
bpf_probe_read_compat_str+0xe4/0x180 kernel/trace/bpf_trace.c:306
bpf_prog_e42f6260c1b72fb3+0x35/0x37
bpf_dispatcher_nop_func include/linux/bpf.h:1000 [inline]
__bpf_prog_run include/linux/filter.h:603 [inline]
bpf_prog_run include/linux/filter.h:610 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2284 [inline]
bpf_trace_run4+0x253/0x470 kernel/trace/bpf_trace.c:2325
__traceiter_sched_switch+0x91/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x2128/0x4570 kernel/sched/core.c:6557
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6872
irqentry_exit+0x53/0x80 kernel/entry/common.c:439
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:696
format_decode+0x11f2/0x1f10 lib/vsprintf.c:2674
vsnprintf+0x14d/0x1c70 lib/vsprintf.c:2757
snprintf+0xd6/0x120 lib/vsprintf.c:2940
proc_readfd_common+0x604/0xaf0 fs/proc/fd.c:268
iterate_dir+0x224/0x560
__do_sys_getdents64 fs/readdir.c:369 [inline]
__se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/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_sem).lock --> &p->pi_lock --> &rq->__lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rq->__lock);
lock(&p->pi_lock);
lock(&rq->__lock);
lock((console_sem).lock);
*** DEADLOCK ***
4 locks held by syz.1.408/6154:
#0: ffff88801f768868 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2ba/0x360 fs/file.c:1032
#1: ffff888071d606f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: iterate_dir+0x10a/0x560 fs/readdir.c:55
#2: ffff8880b8f3a9d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
#3: ffffffff8d32e680 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#3: ffffffff8d32e680 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#3: ffffffff8d32e680 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2283 [inline]
#3: ffffffff8d32e680 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x16a/0x470 kernel/trace/bpf_trace.c:2325
stack backtrace:
CPU: 1 PID: 6154 Comm: syz.1.408 Not tainted 6.1.129-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
check_noncircular+0x2fa/0x3b0 kernel/locking/lockdep.c:2170
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
down_trylock+0x1c/0xa0 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x105/0x250 kernel/printk/printk.c:243
console_trylock kernel/printk/printk.c:2650 [inline]
console_trylock_spinning kernel/printk/printk.c:1896 [inline]
vprintk_emit+0x1ee/0x740 kernel/printk/printk.c:2302
_printk+0xd1/0x111 kernel/printk/printk.c:2328
fail_dump lib/fault-inject.c:45 [inline]
should_fail_ex+0x387/0x4d0 lib/fault-inject.c:147
strncpy_from_user+0x32/0x360 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x6c/0x130 mm/maccess.c:186
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:204 [inline]
____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:310 [inline]
bpf_probe_read_compat_str+0xe4/0x180 kernel/trace/bpf_trace.c:306
bpf_prog_e42f6260c1b72fb3+0x35/0x37
bpf_dispatcher_nop_func include/linux/bpf.h:1000 [inline]
__bpf_prog_run include/linux/filter.h:603 [inline]
bpf_prog_run include/linux/filter.h:610 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2284 [inline]
bpf_trace_run4+0x253/0x470 kernel/trace/bpf_trace.c:2325
__traceiter_sched_switch+0x91/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x2128/0x4570 kernel/sched/core.c:6557
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6872
irqentry_exit+0x53/0x80 kernel/entry/common.c:439
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:696
RIP: 0010:format_decode+0x11f2/0x1f10 lib/vsprintf.c:2574
Code: 24 80 00 00 00 4c 8b 6c 24 38 0f 85 8b 0c 00 00 48 c7 c3 00 ff ff ff 48 8b 44 24 18 48 23 18 41 bf 12 00 00 00 e9 0f ff ff ff 79 54 df f6 48 ba 00 00 00 00 00 fc ff df 4c 8b 6c 24 38 e9 22
RSP: 0018:ffffc900033c7940 EFLAGS: 00000216
RAX: 0000000000000000 RBX: 0000000000000075 RCX: 000000008b1c4e01
RDX: ffff88802e603b80 RSI: 0000000000000075 RDI: 000000000000002a
RBP: ffffc900033c7a30 R08: ffffffff8aab3842 R09: ffffffff8aab368b
R10: 0000000000000005 R11: ffff88802e603b80 R12: ffffc900033c79c0
R13: 00000000ffffff00 R14: ffffffff8b1c4e61 R15: 0000000000000075
vsnprintf+0x14d/0x1c70 lib/vsprintf.c:2757
snprintf+0xd6/0x120 lib/vsprintf.c:2940
proc_readfd_common+0x604/0xaf0 fs/proc/fd.c:268
iterate_dir+0x224/0x560
__do_sys_getdents64 fs/readdir.c:369 [inline]
__se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1296b8d169
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:00007f1297a16038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f1296da6160 RCX: 00007f1296b8d169
RDX: 00000000000000a8 RSI: 00004000000000c0 RDI: 0000000000000005
RBP: 00007f1297a16090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f1296da6160 R15: 00007ffc8cda1618
CPU: 1 PID: 6154 Comm: syz.1.408 Not tainted 6.1.129-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
fail_dump lib/fault-inject.c:52 [inline]
should_fail_ex+0x3a6/0x4d0 lib/fault-inject.c:147
strncpy_from_user+0x32/0x360 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x6c/0x130 mm/maccess.c:186
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:204 [inline]
____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:310 [inline]
bpf_probe_read_compat_str+0xe4/0x180 kernel/trace/bpf_trace.c:306
bpf_prog_e42f6260c1b72fb3+0x35/0x37
bpf_dispatcher_nop_func include/linux/bpf.h:1000 [inline]
__bpf_prog_run include/linux/filter.h:603 [inline]
bpf_prog_run include/linux/filter.h:610 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2284 [inline]
bpf_trace_run4+0x253/0x470 kernel/trace/bpf_trace.c:2325
__traceiter_sched_switch+0x91/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x2128/0x4570 kernel/sched/core.c:6557
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6872
irqentry_exit+0x53/0x80 kernel/entry/common.c:439
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:696
RIP: 0010:format_decode+0x11f2/0x1f10 lib/vsprintf.c:2574
Code: 24 80 00 00 00 4c 8b 6c 24 38 0f 85 8b 0c 00 00 48 c7 c3 00 ff ff ff 48 8b 44 24 18 48 23 18 41 bf 12 00 00 00 e9 0f ff ff ff 79 54 df f6 48 ba 00 00 00 00 00 fc ff df 4c 8b 6c 24 38 e9 22
RSP: 0018:ffffc900033c7940 EFLAGS: 00000216
RAX: 0000000000000000 RBX: 0000000000000075 RCX: 000000008b1c4e01
RDX: ffff88802e603b80 RSI: 0000000000000075 RDI: 000000000000002a
RBP: ffffc900033c7a30 R08: ffffffff8aab3842 R09: ffffffff8aab368b
R10: 0000000000000005 R11: ffff88802e603b80 R12: ffffc900033c79c0
R13: 00000000ffffff00 R14: ffffffff8b1c4e61 R15: 0000000000000075
vsnprintf+0x14d/0x1c70 lib/vsprintf.c:2757
snprintf+0xd6/0x120 lib/vsprintf.c:2940
proc_readfd_common+0x604/0xaf0 fs/proc/fd.c:268
iterate_dir+0x224/0x560
__do_sys_getdents64 fs/readdir.c:369 [inline]
__se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1296b8d169
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:00007f1297a16038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f1296da6160 RCX: 00007f1296b8d169
RDX: 00000000000000a8 RSI: 00004000000000c0 RDI: 0000000000000005
RBP: 00007f1297a16090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f1296da6160 R15: 00007ffc8cda1618
----------------
Code disassembly (best guess):
0: 24 80 and $0x80,%al
2: 00 00 add %al,(%rax)
4: 00 4c 8b 6c add %cl,0x6c(%rbx,%rcx,4)
8: 24 38 and $0x38,%al
a: 0f 85 8b 0c 00 00 jne 0xc9b
10: 48 c7 c3 00 ff ff ff mov $0xffffffffffffff00,%rbx
17: 48 8b 44 24 18 mov 0x18(%rsp),%rax
1c: 48 23 18 and (%rax),%rbx
1f: 41 bf 12 00 00 00 mov $0x12,%r15d
25: e9 0f ff ff ff jmp 0xffffff39
* 2a: e8 79 54 df f6 call 0xf6df54a8 <-- trapping instruction
2f: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
36: fc ff df
39: 4c 8b 6c 24 38 mov 0x38(%rsp),%r13
3e: e9 .byte 0xe9
3f: 22 .byte 0x22