FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
======================================================
WARNING: possible circular locking dependency detected
6.16.0-syzkaller #0 Not tainted
------------------------------------------------------
syz.3.3135/17543 is trying to acquire lock:
ffffffff8e4d2200 (console_owner){-.-.}-{0:0}, at: console_lock_spinning_enable+0x9f/0xd0 kernel/printk/printk.c:1924
but task is already holding lock:
ffff88802b439358 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x6c9/0x10f0 kernel/workqueue.c:2298
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&pool->lock){-.-.}-{2:2}:
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
__queue_work+0x26b/0x10f0 kernel/workqueue.c:2301
queue_work_on+0x15f/0x1f0 kernel/workqueue.c:2392
queue_work include/linux/workqueue.h:662 [inline]
rpm_suspend+0xeba/0x11d0 drivers/base/power/runtime.c:673
rpm_idle+0x5b4/0x730 drivers/base/power/runtime.c:547
__pm_runtime_idle+0xba/0x1a0 drivers/base/power/runtime.c:1112
pm_runtime_put include/linux/pm_runtime.h:470 [inline]
__device_attach+0x37e/0x4b0 drivers/base/dd.c:1047
bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
device_add+0x1148/0x1a70 drivers/base/core.c:3692
serial_base_port_add+0x362/0x4c0 drivers/tty/serial/serial_base_bus.c:183
serial_core_port_device_add drivers/tty/serial/serial_core.c:3341 [inline]
serial_core_register_port+0x13c/0x2570 drivers/tty/serial/serial_core.c:3380
serial8250_register_8250_port+0x159b/0x23c0 drivers/tty/serial/8250/8250_core.c:822
serial_pnp_probe+0x431/0x910 drivers/tty/serial/8250/8250_pnp.c:480
pnp_device_probe+0x2a5/0x4d0 drivers/pnp/driver.c:111
call_driver_probe drivers/base/dd.c:579 [inline]
really_probe+0x241/0xa90 drivers/base/dd.c:657
__driver_probe_device+0x1de/0x440 drivers/base/dd.c:799
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829
__driver_attach+0x283/0x580 drivers/base/dd.c:1215
bus_for_each_dev+0x13b/0x1d0 drivers/base/bus.c:370
bus_add_driver+0x2e9/0x690 drivers/base/bus.c:678
driver_register+0x15c/0x4b0 drivers/base/driver.c:249
serial8250_init+0xc9/0x1e0 drivers/tty/serial/8250/8250_platform.c:315
do_one_initcall+0x120/0x6e0 init/main.c:1274
do_initcall_level init/main.c:1336 [inline]
do_initcalls init/main.c:1352 [inline]
do_basic_setup init/main.c:1371 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1584
kernel_init+0x1c/0x2b0 init/main.c:1474
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
-> #2 (&dev->power.lock){-...}-{3:3}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
__pm_runtime_resume+0xa9/0x170 drivers/base/power/runtime.c:1179
pm_runtime_get include/linux/pm_runtime.h:418 [inline]
__uart_start+0x1b0/0x4c0 drivers/tty/serial/serial_core.c:149
uart_write+0x218/0xb30 drivers/tty/serial/serial_core.c:636
process_output_block drivers/tty/n_tty.c:561 [inline]
n_tty_write+0x40f/0x1160 drivers/tty/n_tty.c:2377
iterate_tty_write drivers/tty/tty_io.c:1006 [inline]
file_tty_write.constprop.0+0x504/0x9b0 drivers/tty/tty_io.c:1081
tty_write drivers/tty/tty_io.c:1102 [inline]
redirected_tty_write drivers/tty/tty_io.c:1125 [inline]
redirected_tty_write+0xd4/0x150 drivers/tty/tty_io.c:1105
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x6c4/0x1150 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x490 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+0x3a/0x60 kernel/locking/spinlock.c:162
uart_port_lock_irqsave include/linux/serial_core.h:717 [inline]
serial8250_console_write+0x181/0x1890 drivers/tty/serial/8250/8250_port.c:3415
console_emit_next_record kernel/printk/printk.c:3138 [inline]
console_flush_all+0x801/0xc60 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
_printk+0xc7/0x100 kernel/printk/printk.c:2475
register_console+0xc2d/0x11b0 kernel/printk/printk.c:4125
univ8250_console_init+0x5f/0x90 drivers/tty/serial/8250/8250_core.c:513
console_init+0x14f/0x680 kernel/printk/printk.c:4323
start_kernel+0x29f/0x4d0 init/main.c:1036
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:307
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:288
common_startup_64+0x13e/0x148
-> #0 (console_owner){-.-.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain kernel/locking/lockdep.c:3911 [inline]
__lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240
lock_acquire kernel/locking/lockdep.c:5871 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
console_lock_spinning_enable+0xb0/0xd0 kernel/printk/printk.c:1924
console_emit_next_record kernel/printk/printk.c:3132 [inline]
console_flush_all+0x7aa/0xc60 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
_printk+0xc7/0x100 kernel/printk/printk.c:2475
fail_dump lib/fault-inject.c:66 [inline]
should_fail_ex+0x4e7/0x640 lib/fault-inject.c:174
strncpy_from_user+0x3b/0x2e0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x7f/0x180 mm/maccess.c:193
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:215 [inline]
____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:310 [inline]
bpf_probe_read_compat_str+0xe8/0x180 kernel/trace/bpf_trace.c:306
bpf_prog_879a8219fba439cb+0x8b/0x91
bpf_dispatcher_nop_func include/linux/bpf.h:1322 [inline]
__bpf_prog_run include/linux/filter.h:718 [inline]
bpf_prog_run include/linux/filter.h:725 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2258 [inline]
bpf_trace_run3+0x242/0x5a0 kernel/trace/bpf_trace.c:2300
__bpf_trace_workqueue_queue_work+0x100/0x140 include/trace/events/workqueue.h:23
__do_trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline]
trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline]
__queue_work+0x4fa/0x10f0 kernel/workqueue.c:2323
queue_work_on+0x1a4/0x1f0 kernel/workqueue.c:2392
queue_work include/linux/workqueue.h:662 [inline]
schedule_work include/linux/workqueue.h:723 [inline]
binder_defer_work drivers/android/binder.c:6330 [inline]
binder_flush+0x14b/0x1a0 drivers/android/binder.c:6097
filp_flush+0x115/0x1c0 fs/open.c:1549
filp_close+0x1c/0x30 fs/open.c:1562
do_dup2+0x327/0x620 fs/file.c:1294
ksys_dup3+0x1ff/0x370 fs/file.c:1406
__do_sys_dup3 fs/file.c:1417 [inline]
__se_sys_dup3 fs/file.c:1415 [inline]
__ia32_sys_dup3+0x71/0xb0 fs/file.c:1415
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
other info that might help us debug this:
Chain exists of:
console_owner --> &dev->power.lock --> &pool->lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&pool->lock);
lock(&dev->power.lock);
lock(&pool->lock);
lock(console_owner);
*** DEADLOCK ***
6 locks held by syz.3.3135/17543:
#0: ffffffff901ec7c8 (binder_deferred_lock){+.+.}-{4:4}, at: binder_defer_work drivers/android/binder.c:6325 [inline]
#0: ffffffff901ec7c8 (binder_deferred_lock){+.+.}-{4:4}, at: binder_flush+0x41/0x1a0 drivers/android/binder.c:6097
#1: ffffffff8e5c4c80 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#1: ffffffff8e5c4c80 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#1: ffffffff8e5c4c80 (rcu_read_lock){....}-{1:3}, at: __queue_work+0xe7/0x10f0 kernel/workqueue.c:2261
#2: ffff88802b439358 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x6c9/0x10f0 kernel/workqueue.c:2298
#3: ffffffff8e5c4c80 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#3: ffffffff8e5c4c80 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#3: ffffffff8e5c4c80 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2257 [inline]
#3: ffffffff8e5c4c80 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run3+0x1c5/0x5a0 kernel/trace/bpf_trace.c:2300
#4: ffffffff8e5b2640 (console_lock){+.+.}-{0:0}, at: _printk+0xc7/0x100 kernel/printk/printk.c:2475
#5: ffffffff8e5b26b0 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:336 [inline]
#5: ffffffff8e5b26b0 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:346 [inline]
#5: ffffffff8e5b26b0 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:288 [inline]
#5: ffffffff8e5b26b0 (console_srcu){....}-{0:0}, at: console_flush_all+0x158/0xc60 kernel/printk/printk.c:3203
stack backtrace:
CPU: 2 UID: 0 PID: 17543 Comm: syz.3.3135 Not tainted 6.16.0-syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2046
check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2178
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain kernel/locking/lockdep.c:3911 [inline]
__lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240
lock_acquire kernel/locking/lockdep.c:5871 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
console_lock_spinning_enable+0xb0/0xd0 kernel/printk/printk.c:1924
console_emit_next_record kernel/printk/printk.c:3132 [inline]
console_flush_all+0x7aa/0xc60 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
_printk+0xc7/0x100 kernel/printk/printk.c:2475
fail_dump lib/fault-inject.c:66 [inline]
should_fail_ex+0x4e7/0x640 lib/fault-inject.c:174
strncpy_from_user+0x3b/0x2e0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x7f/0x180 mm/maccess.c:193
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:215 [inline]
____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:310 [inline]
bpf_probe_read_compat_str+0xe8/0x180 kernel/trace/bpf_trace.c:306
bpf_prog_879a8219fba439cb+0x8b/0x91
bpf_dispatcher_nop_func include/linux/bpf.h:1322 [inline]
__bpf_prog_run include/linux/filter.h:718 [inline]
bpf_prog_run include/linux/filter.h:725 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2258 [inline]
bpf_trace_run3+0x242/0x5a0 kernel/trace/bpf_trace.c:2300
__bpf_trace_workqueue_queue_work+0x100/0x140 include/trace/events/workqueue.h:23
__do_trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline]
trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline]
__queue_work+0x4fa/0x10f0 kernel/workqueue.c:2323
queue_work_on+0x1a4/0x1f0 kernel/workqueue.c:2392
queue_work include/linux/workqueue.h:662 [inline]
schedule_work include/linux/workqueue.h:723 [inline]
binder_defer_work drivers/android/binder.c:6330 [inline]
binder_flush+0x14b/0x1a0 drivers/android/binder.c:6097
filp_flush+0x115/0x1c0 fs/open.c:1549
filp_close+0x1c/0x30 fs/open.c:1562
do_dup2+0x327/0x620 fs/file.c:1294
ksys_dup3+0x1ff/0x370 fs/file.c:1406
__do_sys_dup3 fs/file.c:1417 [inline]
__se_sys_dup3 fs/file.c:1415 [inline]
__ia32_sys_dup3+0x71/0xb0 fs/file.c:1415
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf707e579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f506e55c EFLAGS: 00000296 ORIG_RAX: 000000000000014a
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000000003
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
CPU: 2 UID: 0 PID: 17543 Comm: syz.3.3135 Not tainted 6.16.0-syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
fail_dump lib/fault-inject.c:73 [inline]
should_fail_ex+0x512/0x640 lib/fault-inject.c:174
strncpy_from_user+0x3b/0x2e0 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x7f/0x180 mm/maccess.c:193
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:215 [inline]
____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:310 [inline]
bpf_probe_read_compat_str+0xe8/0x180 kernel/trace/bpf_trace.c:306
bpf_prog_879a8219fba439cb+0x8b/0x91
bpf_dispatcher_nop_func include/linux/bpf.h:1322 [inline]
__bpf_prog_run include/linux/filter.h:718 [inline]
bpf_prog_run include/linux/filter.h:725 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2258 [inline]
bpf_trace_run3+0x242/0x5a0 kernel/trace/bpf_trace.c:2300
__bpf_trace_workqueue_queue_work+0x100/0x140 include/trace/events/workqueue.h:23
__do_trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline]
trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline]
__queue_work+0x4fa/0x10f0 kernel/workqueue.c:2323
queue_work_on+0x1a4/0x1f0 kernel/workqueue.c:2392
queue_work include/linux/workqueue.h:662 [inline]
schedule_work include/linux/workqueue.h:723 [inline]
binder_defer_work drivers/android/binder.c:6330 [inline]
binder_flush+0x14b/0x1a0 drivers/android/binder.c:6097
filp_flush+0x115/0x1c0 fs/open.c:1549
filp_close+0x1c/0x30 fs/open.c:1562
do_dup2+0x327/0x620 fs/file.c:1294
ksys_dup3+0x1ff/0x370 fs/file.c:1406
__do_sys_dup3 fs/file.c:1417 [inline]
__se_sys_dup3 fs/file.c:1415 [inline]
__ia32_sys_dup3+0x71/0xb0 fs/file.c:1415
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf707e579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f506e55c EFLAGS: 00000296 ORIG_RAX: 000000000000014a
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000000003
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi