syz.0.3156[19975] is installing a program with bpf_probe_write_user helper that may corrupt user memory!
syz.0.3156[19975] is installing a program with bpf_probe_write_user helper that may corrupt user memory!
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
======================================================
WARNING: possible circular locking dependency detected
5.15.165-syzkaller #0 Not tainted
------------------------------------------------------
syz.0.3156/19975 is trying to acquire lock:
ffffffff8c7fc438 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0x1c/0xa0 kernel/locking/semaphore.c:138
but task is already holding lock:
ffff8880b903a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xa8/0x140 kernel/sched/core.c:483
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&rq->__lock){-.-.}-{2:2}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
_raw_spin_lock_nested+0x2d/0x40 kernel/locking/spinlock.c:368
raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
raw_spin_rq_lock kernel/sched/sched.h:1326 [inline]
rq_lock kernel/sched/sched.h:1621 [inline]
task_fork_fair+0x5d/0x350 kernel/sched/fair.c:11484
sched_cgroup_fork+0x2d3/0x330 kernel/sched/core.c:4463
copy_process+0x224a/0x3ef0 kernel/fork.c:2320
kernel_clone+0x210/0x960 kernel/fork.c:2604
kernel_thread+0x168/0x1e0 kernel/fork.c:2656
rest_init+0x21/0x330 init/main.c:706
start_kernel+0x48c/0x540 init/main.c:1140
secondary_startup_64_no_verify+0xb1/0xbb
-> #1 (&p->pi_lock){-.-.}-{2:2}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
__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+0xae/0x1300 kernel/sched/core.c:4027
up+0x6e/0x90 kernel/locking/semaphore.c:190
__up_console_sem+0x11a/0x1e0 kernel/printk/printk.c:256
console_unlock+0x1145/0x12b0 kernel/printk/printk.c:2760
vprintk_emit+0xbf/0x150 kernel/printk/printk.c:2274
_printk+0xd1/0x120 kernel/printk/printk.c:2299
addrconf_notify+0xa80/0xf30 net/ipv6/addrconf.c:3659
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
call_netdevice_notifiers_info net/core/dev.c:2018 [inline]
netdev_state_change+0x1a3/0x250 net/core/dev.c:1409
linkwatch_do_dev+0x10c/0x160 net/core/link_watch.c:167
__linkwatch_run_queue+0x4ca/0x7f0 net/core/link_watch.c:213
linkwatch_event+0x48/0x50 net/core/link_watch.c:252
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
-> #0 ((console_sem).lock){-.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
__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:138
__down_trylock_console_sem+0x105/0x250 kernel/printk/printk.c:239
console_trylock kernel/printk/printk.c:2575 [inline]
console_trylock_spinning+0x8a/0x3f0 kernel/printk/printk.c:1867
vprintk_emit+0xa6/0x150 kernel/printk/printk.c:2273
_printk+0xd1/0x120 kernel/printk/printk.c:2299
fail_dump lib/fault-inject.c:45 [inline]
should_fail+0x36c/0x4c0 lib/fault-inject.c:146
__copy_to_user_inatomic include/linux/uaccess.h:133 [inline]
copy_to_user_nofault+0xdd/0x1c0 mm/maccess.c:255
bpf_prog_6303d92f98284ad8+0x3b/0x820
bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
bpf_trace_run3+0x1d1/0x380 kernel/trace/bpf_trace.c:1918
__traceiter_sched_switch+0x7d/0xb0 include/trace/events/sched.h:220
trace_sched_switch include/trace/events/sched.h:220 [inline]
__schedule+0x1e8d/0x45b0 kernel/sched/core.c:6370
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6777
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:643
arch_atomic64_read arch/x86/include/asm/atomic64_64.h:22 [inline]
arch_atomic_long_read include/linux/atomic/atomic-long.h:29 [inline]
atomic_long_read include/linux/atomic/atomic-instrumented.h:1184 [inline]
fsnotify_parent include/linux/fsnotify.h:62 [inline]
fsnotify_file include/linux/fsnotify.h:105 [inline]
fsnotify_modify include/linux/fsnotify.h:323 [inline]
vfs_write+0x5f5/0xe50 fs/read_write.c:598
ksys_write+0x1a2/0x2c0 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
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.0.3156/19975:
#0: ffff888018ba8ff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2cb/0x380 fs/file.c:1088
#1: ffff88801fc3a460 (sb_writers#4){.+.+}-{0:0}, at: vfs_write+0x29a/0xe50 fs/read_write.c:590
#2: ffff8880b903a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xa8/0x140 kernel/sched/core.c:483
#3: ffffffff8c91fbe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
stack backtrace:
CPU: 1 PID: 19975 Comm: syz.0.3156 Not tainted 5.15.165-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
__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:138
__down_trylock_console_sem+0x105/0x250 kernel/printk/printk.c:239
console_trylock kernel/printk/printk.c:2575 [inline]
console_trylock_spinning+0x8a/0x3f0 kernel/printk/printk.c:1867
vprintk_emit+0xa6/0x150 kernel/printk/printk.c:2273
_printk+0xd1/0x120 kernel/printk/printk.c:2299
fail_dump lib/fault-inject.c:45 [inline]
should_fail+0x36c/0x4c0 lib/fault-inject.c:146
__copy_to_user_inatomic include/linux/uaccess.h:133 [inline]
copy_to_user_nofault+0xdd/0x1c0 mm/maccess.c:255
bpf_prog_6303d92f98284ad8+0x3b/0x820
bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
bpf_trace_run3+0x1d1/0x380 kernel/trace/bpf_trace.c:1918
__traceiter_sched_switch+0x7d/0xb0 include/trace/events/sched.h:220
trace_sched_switch include/trace/events/sched.h:220 [inline]
__schedule+0x1e8d/0x45b0 kernel/sched/core.c:6370
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6777
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:643
RIP: 0010:fsnotify_parent include/linux/fsnotify.h:62 [inline]
RIP: 0010:fsnotify_file include/linux/fsnotify.h:105 [inline]
RIP: 0010:fsnotify_modify include/linux/fsnotify.h:323 [inline]
RIP: 0010:vfs_write+0x5f5/0xe50 fs/read_write.c:598
Code: 00 00 e8 5e 11 f5 ff 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 af 0f f5 ff 49 8b 1c 24 <31> ff 48 89 de e8 b1 4a ab ff 48 85 db 0f 84 45 01 00 00 4c 89 e8
RSP: 0018:ffffc90003277ca0 EFLAGS: 00000246
RAX: 1ffff11003f874fa RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801fc3a7d0
RBP: ffffc90003277e30 R08: dffffc0000000000 R09: ffffed1003f874fb
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88801fc3a7d0
R13: ffff888060d2d070 R14: 1ffff9200064efa0 R15: 0000000000000001
ksys_write+0x1a2/0x2c0 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8d92d3599f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 1c 8e 02 00 48
RSP: 002b:00007f8d91171030 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000000000a RCX: 00007f8d92d3599f
RDX: 0000000000000001 RSI: 00007f8d91171090 RDI: 000000000000000a
RBP: 00007f8d91171090 R08: 0000000000000000 R09: 00007f8d91170df7
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f8d92ed3130 R15: 00007ffc635722f8
CPU: 1 PID: 19975 Comm: syz.0.3156 Not tainted 5.15.165-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
fail_dump lib/fault-inject.c:52 [inline]
should_fail+0x38a/0x4c0 lib/fault-inject.c:146
__copy_to_user_inatomic include/linux/uaccess.h:133 [inline]
copy_to_user_nofault+0xdd/0x1c0 mm/maccess.c:255
bpf_prog_6303d92f98284ad8+0x3b/0x820
bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
bpf_trace_run3+0x1d1/0x380 kernel/trace/bpf_trace.c:1918
__traceiter_sched_switch+0x7d/0xb0 include/trace/events/sched.h:220
trace_sched_switch include/trace/events/sched.h:220 [inline]
__schedule+0x1e8d/0x45b0 kernel/sched/core.c:6370
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6777
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:643
RIP: 0010:fsnotify_parent include/linux/fsnotify.h:62 [inline]
RIP: 0010:fsnotify_file include/linux/fsnotify.h:105 [inline]
RIP: 0010:fsnotify_modify include/linux/fsnotify.h:323 [inline]
RIP: 0010:vfs_write+0x5f5/0xe50 fs/read_write.c:598
Code: 00 00 e8 5e 11 f5 ff 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 af 0f f5 ff 49 8b 1c 24 <31> ff 48 89 de e8 b1 4a ab ff 48 85 db 0f 84 45 01 00 00 4c 89 e8
RSP: 0018:ffffc90003277ca0 EFLAGS: 00000246
RAX: 1ffff11003f874fa RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801fc3a7d0
RBP: ffffc90003277e30 R08: dffffc0000000000 R09: ffffed1003f874fb
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88801fc3a7d0
R13: ffff888060d2d070 R14: 1ffff9200064efa0 R15: 0000000000000001
ksys_write+0x1a2/0x2c0 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8d92d3599f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 1c 8e 02 00 48
RSP: 002b:00007f8d91171030 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000000000a RCX: 00007f8d92d3599f
RDX: 0000000000000001 RSI: 00007f8d91171090 RDI: 000000000000000a
RBP: 00007f8d91171090 R08: 0000000000000000 R09: 00007f8d91170df7
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f8d92ed3130 R15: 00007ffc635722f8
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: e8 5e 11 f5 ff call 0xfff51165
7: 4c 89 e0 mov %r12,%rax
a: 48 c1 e8 03 shr $0x3,%rax
e: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
15: fc ff df
18: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1)
1c: 74 08 je 0x26
1e: 4c 89 e7 mov %r12,%rdi
21: e8 af 0f f5 ff call 0xfff50fd5
26: 49 8b 1c 24 mov (%r12),%rbx
* 2a: 31 ff xor %edi,%edi <-- trapping instruction
2c: 48 89 de mov %rbx,%rsi
2f: e8 b1 4a ab ff call 0xffab4ae5
34: 48 85 db test %rbx,%rbx
37: 0f 84 45 01 00 00 je 0x182
3d: 4c 89 e8 mov %r13,%rax