FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
======================================================
WARNING: possible circular locking dependency detected
6.1.112-syzkaller #0 Not tainted
------------------------------------------------------
syz.3.1421/12893 is trying to acquire lock:
ffffffff8d2071b8 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0x1c/0xa0 kernel/locking/semaphore.c:139
but task is already holding lock:
ffff8880b8e3a9d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xa8/0x140 kernel/sched/core.c:545
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:11877
sched_cgroup_fork+0x374/0x400 kernel/sched/core.c:4682
copy_process+0x2442/0x4060 kernel/fork.c:2384
kernel_clone+0x222/0x920 kernel/fork.c:2682
user_mode_thread+0x12e/0x190 kernel/fork.c:2758
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/0x12e0 kernel/sched/core.c:4108
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
do_con_write+0x7182/0x7270 drivers/tty/vt/vt.c:2965
con_write+0x20/0x40 drivers/tty/vt/vt.c:3295
process_output_block drivers/tty/n_tty.c:586 [inline]
n_tty_write+0xd7f/0x1260 drivers/tty/n_tty.c:2377
do_tty_write drivers/tty/tty_io.c:1018 [inline]
file_tty_write+0x504/0x890 drivers/tty/tty_io.c:1089
call_write_iter include/linux/fs.h:2265 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x857/0xbc0 fs/read_write.c:584
ksys_write+0x19c/0x2c0 fs/read_write.c:637
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
-> #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
__copy_to_user_inatomic include/linux/uaccess.h:101 [inline]
copy_to_user_nofault+0xd9/0x1c0 mm/maccess.c:149
bpf_prog_6303d92f98284ad8+0x3b/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:989 [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:2273 [inline]
bpf_trace_run4+0x253/0x470 kernel/trace/bpf_trace.c:2314
__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:6555
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
irqentry_exit+0x53/0x80 kernel/entry/common.c:439
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:658
memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
memory_is_poisoned mm/kasan/generic.c:159 [inline]
check_region_inline mm/kasan/generic.c:180 [inline]
kasan_check_range+0x165/0x290 mm/kasan/generic.c:189
memset+0x1f/0x40 mm/kasan/shadow.c:44
shmem_get_inode+0x458/0xbd0 mm/shmem.c:2365
__shmem_file_setup+0x109/0x290 mm/shmem.c:4245
__do_sys_memfd_create mm/memfd.c:321 [inline]
__se_sys_memfd_create+0x1d6/0x440 mm/memfd.c:266
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 ***
2 locks held by syz.3.1421/12893:
#0: ffff8880b8e3a9d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xa8/0x140 kernel/sched/core.c:545
#1: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#1: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#1: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2272 [inline]
#1: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x16a/0x470 kernel/trace/bpf_trace.c:2314
stack backtrace:
CPU: 0 PID: 12893 Comm: syz.3.1421 Not tainted 6.1.112-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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
__copy_to_user_inatomic include/linux/uaccess.h:101 [inline]
copy_to_user_nofault+0xd9/0x1c0 mm/maccess.c:149
bpf_prog_6303d92f98284ad8+0x3b/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:989 [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:2273 [inline]
bpf_trace_run4+0x253/0x470 kernel/trace/bpf_trace.c:2314
__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:6555
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
irqentry_exit+0x53/0x80 kernel/entry/common.c:439
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:658
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:114 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x165/0x290 mm/kasan/generic.c:189
Code: c8 00 00 00 bb 08 00 00 00 44 29 fb 49 01 d9 4d 29 ce 4c 89 f5 48 8d 5d 07 48 85 ed 48 0f 49 dd 48 c1 eb 03 85 db 74 22 31 ed <4d> 8b 34 29 4d 85 f6 75 44 48 83 c5 08 ff cb 75 ef 4d 29 ca 49 29
RSP: 0018:ffffc9000551fdf0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000003 RCX: ffffffff81c52b58
RDX: 0000000000000001 RSI: 0000000000000140 RDI: ffff88805510c570
RBP: 0000000000000008 R08: dffffc0000000000 R09: ffffed100aa218b0
R10: 1ffff1100aa218d5 R11: dffffc0000000001 R12: ffff88805510c6b0
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000006
memset+0x1f/0x40 mm/kasan/shadow.c:44
shmem_get_inode+0x458/0xbd0 mm/shmem.c:2365
__shmem_file_setup+0x109/0x290 mm/shmem.c:4245
__do_sys_memfd_create mm/memfd.c:321 [inline]
__se_sys_memfd_create+0x1d6/0x440 mm/memfd.c:266
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: 0033:0x7fe84ef7dff9
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:00007fe84fdb7e18 EFLAGS: 00000202 ORIG_RAX: 000000000000013f
RAX: ffffffffffffffda RBX: 0000000000000235 RCX: 00007fe84ef7dff9
RDX: 00007fe84fdb7ef0 RSI: 0000000000000000 RDI: 00007fe84eff0b02
RBP: 0000000020000300 R08: 00007fe84fdb7bb7 R09: 00007fe84fdb7e40
R10: 000000000000000a R11: 0000000000000202 R12: 0000000020000280
R13: 00007fe84fdb7ef0 R14: 00007fe84fdb7eb0 R15: 0000000020000540
CPU: 0 PID: 12893 Comm: syz.3.1421 Not tainted 6.1.112-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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
__copy_to_user_inatomic include/linux/uaccess.h:101 [inline]
copy_to_user_nofault+0xd9/0x1c0 mm/maccess.c:149
bpf_prog_6303d92f98284ad8+0x3b/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:989 [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:2273 [inline]
bpf_trace_run4+0x253/0x470 kernel/trace/bpf_trace.c:2314
__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:6555
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
irqentry_exit+0x53/0x80 kernel/entry/common.c:439
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:658
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:114 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x165/0x290 mm/kasan/generic.c:189
Code: c8 00 00 00 bb 08 00 00 00 44 29 fb 49 01 d9 4d 29 ce 4c 89 f5 48 8d 5d 07 48 85 ed 48 0f 49 dd 48 c1 eb 03 85 db 74 22 31 ed <4d> 8b 34 29 4d 85 f6 75 44 48 83 c5 08 ff cb 75 ef 4d 29 ca 49 29
RSP: 0018:ffffc9000551fdf0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000003 RCX: ffffffff81c52b58
RDX: 0000000000000001 RSI: 0000000000000140 RDI: ffff88805510c570
RBP: 0000000000000008 R08: dffffc0000000000 R09: ffffed100aa218b0
R10: 1ffff1100aa218d5 R11: dffffc0000000001 R12: ffff88805510c6b0
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000006
memset+0x1f/0x40 mm/kasan/shadow.c:44
shmem_get_inode+0x458/0xbd0 mm/shmem.c:2365
__shmem_file_setup+0x109/0x290 mm/shmem.c:4245
__do_sys_memfd_create mm/memfd.c:321 [inline]
__se_sys_memfd_create+0x1d6/0x440 mm/memfd.c:266
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: 0033:0x7fe84ef7dff9
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:00007fe84fdb7e18 EFLAGS: 00000202 ORIG_RAX: 000000000000013f
RAX: ffffffffffffffda RBX: 0000000000000235 RCX: 00007fe84ef7dff9
RDX: 00007fe84fdb7ef0 RSI: 0000000000000000 RDI: 00007fe84eff0b02
RBP: 0000000020000300 R08: 00007fe84fdb7bb7 R09: 00007fe84fdb7e40
R10: 000000000000000a R11: 0000000000000202 R12: 0000000020000280
R13: 00007fe84fdb7ef0 R14: 00007fe84fdb7eb0 R15: 0000000020000540
loop3: detected capacity change from 0 to 64
hfs: dir_umask requires a value
hfs: unable to parse mount options
----------------
Code disassembly (best guess):
0: c8 00 00 00 enter $0x0,$0x0
4: bb 08 00 00 00 mov $0x8,%ebx
9: 44 29 fb sub %r15d,%ebx
c: 49 01 d9 add %rbx,%r9
f: 4d 29 ce sub %r9,%r14
12: 4c 89 f5 mov %r14,%rbp
15: 48 8d 5d 07 lea 0x7(%rbp),%rbx
19: 48 85 ed test %rbp,%rbp
1c: 48 0f 49 dd cmovns %rbp,%rbx
20: 48 c1 eb 03 shr $0x3,%rbx
24: 85 db test %ebx,%ebx
26: 74 22 je 0x4a
28: 31 ed xor %ebp,%ebp
* 2a: 4d 8b 34 29 mov (%r9,%rbp,1),%r14 <-- trapping instruction
2e: 4d 85 f6 test %r14,%r14
31: 75 44 jne 0x77
33: 48 83 c5 08 add $0x8,%rbp
37: ff cb dec %ebx
39: 75 ef jne 0x2a
3b: 4d 29 ca sub %r9,%r10
3e: 49 rex.WB
3f: 29 .byte 0x29