FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 1
======================================================
WARNING: possible circular locking dependency detected
6.11.0-syzkaller-02574-ga430d95c5efa #0 Not tainted
------------------------------------------------------
syz.3.146/5930 is trying to acquire lock:
ffffffff8dda7cb8 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0x12/0x70 kernel/locking/semaphore.c:139
but task is already holding lock:
ffff88802b83eb98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:568 [inline]
ffff88802b83eb98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:553
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&rq->__lock){-.-.}-{2:2}:
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:560
raw_spin_rq_lock kernel/sched/sched.h:1415 [inline]
rq_lock kernel/sched/sched.h:1714 [inline]
task_fork_fair+0x73/0x250 kernel/sched/fair.c:12710
sched_cgroup_fork+0x3cf/0x510 kernel/sched/core.c:4633
copy_process+0x470a/0x6f50 kernel/fork.c:2483
kernel_clone+0xfd/0x960 kernel/fork.c:2781
user_mode_thread+0xb4/0xf0 kernel/fork.c:2859
rest_init+0x23/0x2b0 init/main.c:712
start_kernel+0x3e4/0x4d0 init/main.c:1105
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x148
-> #1 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
try_to_wake_up+0x9a/0x13e0 kernel/sched/core.c:4051
up+0x79/0xb0 kernel/locking/semaphore.c:191
__up_console_sem kernel/printk/printk.c:340 [inline]
__console_unlock kernel/printk/printk.c:2802 [inline]
console_unlock+0x23e/0x290 kernel/printk/printk.c:3121
vga_remove_vgacon drivers/pci/vgaarb.c:186 [inline]
vga_remove_vgacon+0x90/0xd0 drivers/pci/vgaarb.c:167
__aperture_remove_legacy_vga_devices drivers/video/aperture.c:331 [inline]
aperture_remove_conflicting_pci_devices+0x16a/0x1e0 drivers/video/aperture.c:369
bochs_pci_probe+0x101/0x1150 drivers/gpu/drm/tiny/bochs.c:648
local_pci_probe+0xde/0x1b0 drivers/pci/pci-driver.c:324
pci_call_probe drivers/pci/pci-driver.c:392 [inline]
__pci_device_probe drivers/pci/pci-driver.c:417 [inline]
pci_device_probe+0x29d/0x7b0 drivers/pci/pci-driver.c:451
call_driver_probe drivers/base/dd.c:578 [inline]
really_probe+0x23e/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+0x13c/0x1d0 drivers/base/bus.c:368
bus_add_driver+0x2e9/0x690 drivers/base/bus.c:673
driver_register+0x15c/0x4b0 drivers/base/driver.c:246
drm_pci_register_driver_if_modeset include/drm/drm_module.h:69 [inline]
bochs_pci_driver_init+0x67/0x80 drivers/gpu/drm/tiny/bochs.c:732
do_one_initcall+0x128/0x630 init/main.c:1269
do_initcall_level init/main.c:1331 [inline]
do_initcalls init/main.c:1347 [inline]
do_basic_setup init/main.c:1366 [inline]
kernel_init_freeable+0x660/0xc50 init/main.c:1580
kernel_init+0x1c/0x2b0 init/main.c:1469
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #0 ((console_sem).lock){-.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3133 [inline]
check_prevs_add kernel/locking/lockdep.c:3252 [inline]
validate_chain kernel/locking/lockdep.c:3868 [inline]
__lock_acquire+0x24ed/0x3cb0 kernel/locking/lockdep.c:5142
lock_acquire kernel/locking/lockdep.c:5759 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
down_trylock+0x12/0x70 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x40/0x140 kernel/printk/printk.c:323
console_trylock kernel/printk/printk.c:2755 [inline]
console_trylock_spinning kernel/printk/printk.c:1958 [inline]
vprintk_emit+0x3d3/0x600 kernel/printk/printk.c:2347
vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2373
fail_dump lib/fault-inject.c:45 [inline]
should_fail_ex+0x46c/0x5b0 lib/fault-inject.c:153
strncpy_from_user+0x38/0x320 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x7f/0x180 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+0x26/0x70 kernel/trace/bpf_trace.c:222
bpf_prog_bc7c5c6b9645592f+0x3d/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline]
__bpf_prog_run include/linux/filter.h:691 [inline]
bpf_prog_run include/linux/filter.h:698 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2406 [inline]
bpf_trace_run4+0x245/0x5a0 kernel/trace/bpf_trace.c:2449
__traceiter_sched_switch+0x6c/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x17cf/0x5490 kernel/sched/core.c:6526
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
wp512_process_buffer+0x429/0x3730 crypto/wp512.c:804
wp512_update+0x2df/0x5c0 crypto/wp512.c:1031
shash_ahash_update+0x1ac/0x1f0 crypto/ahash.c:55
crypto_ahash_update+0x7b/0x110 crypto/ahash.c:333
hash_sendmsg+0x2af/0x1180 crypto/algif_hash.c:149
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0x9ae/0xb40 net/socket.c:2603
___sys_sendmsg+0x135/0x1e0 net/socket.c:2657
__sys_sendmmsg+0x2a5/0x450 net/socket.c:2736
__compat_sys_sendmmsg net/compat.c:360 [inline]
__do_compat_sys_sendmmsg net/compat.c:367 [inline]
__se_compat_sys_sendmmsg net/compat.c:364 [inline]
__ia32_compat_sys_sendmmsg+0x9d/0x100 net/compat.c:364
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
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 ***
3 locks held by syz.3.146/5930:
#0: ffff888022b68258 (sk_lock-AF_ALG){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1609 [inline]
#0: ffff888022b68258 (sk_lock-AF_ALG){+.+.}-{0:0}, at: hash_sendmsg+0xb7/0x1180 crypto/algif_hash.c:77
#1: ffff88802b83eb98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:568 [inline]
#1: ffff88802b83eb98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:553
#2: ffffffff8ddb9b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#2: ffffffff8ddb9b60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#2: ffffffff8ddb9b60 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2405 [inline]
#2: ffffffff8ddb9b60 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x1d6/0x5a0 kernel/trace/bpf_trace.c:2449
stack backtrace:
CPU: 2 UID: 0 PID: 5930 Comm: syz.3.146 Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
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:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2186
check_prev_add kernel/locking/lockdep.c:3133 [inline]
check_prevs_add kernel/locking/lockdep.c:3252 [inline]
validate_chain kernel/locking/lockdep.c:3868 [inline]
__lock_acquire+0x24ed/0x3cb0 kernel/locking/lockdep.c:5142
lock_acquire kernel/locking/lockdep.c:5759 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
down_trylock+0x12/0x70 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x40/0x140 kernel/printk/printk.c:323
console_trylock kernel/printk/printk.c:2755 [inline]
console_trylock_spinning kernel/printk/printk.c:1958 [inline]
vprintk_emit+0x3d3/0x600 kernel/printk/printk.c:2347
vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2373
fail_dump lib/fault-inject.c:45 [inline]
should_fail_ex+0x46c/0x5b0 lib/fault-inject.c:153
strncpy_from_user+0x38/0x320 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x7f/0x180 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+0x26/0x70 kernel/trace/bpf_trace.c:222
bpf_prog_bc7c5c6b9645592f+0x3d/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline]
__bpf_prog_run include/linux/filter.h:691 [inline]
bpf_prog_run include/linux/filter.h:698 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2406 [inline]
bpf_trace_run4+0x245/0x5a0 kernel/trace/bpf_trace.c:2449
__traceiter_sched_switch+0x6c/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x17cf/0x5490 kernel/sched/core.c:6526
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:wp512_process_buffer+0x429/0x3730 crypto/wp512.c:804
Code: c1 eb 38 89 84 24 b4 00 00 00 4c 63 f8 e8 ef c8 3d fd 48 8d 3c dd e0 e7 ab 8b 4c 8b 5c 24 68 48 89 f8 48 c1 e8 03 80 3c 28 00 <0f> 85 fa 18 00 00 48 8b 04 24 48 8b 1c dd e0 e7 ab 8b 48 c1 e8 30
RSP: 0018:ffffc9002700f5c8 EFLAGS: 00000246
RAX: 1ffffffff1757d61 RBX: 0000000000000065 RCX: ffffffff844d73cd
RDX: ffff888027938000 RSI: ffffffff844d5bd1 RDI: ffffffff8babeb08
RBP: dffffc0000000000 R08: 0000000000000005 R09: 000000000000000a
R10: 0000000000000002 R11: 6b5bb25945084e00 R12: fbb9d0780391b031
R13: 65d50485f7a170b8 R14: d172ce1641a7126c R15: 0000000000000002
wp512_update+0x2df/0x5c0 crypto/wp512.c:1031
shash_ahash_update+0x1ac/0x1f0 crypto/ahash.c:55
crypto_ahash_update+0x7b/0x110 crypto/ahash.c:333
hash_sendmsg+0x2af/0x1180 crypto/algif_hash.c:149
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0x9ae/0xb40 net/socket.c:2603
___sys_sendmsg+0x135/0x1e0 net/socket.c:2657
__sys_sendmmsg+0x2a5/0x450 net/socket.c:2736
__compat_sys_sendmmsg net/compat.c:360 [inline]
__do_compat_sys_sendmmsg net/compat.c:367 [inline]
__se_compat_sys_sendmmsg net/compat.c:364 [inline]
__ia32_compat_sys_sendmmsg+0x9d/0x100 net/compat.c:364
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf741e579
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:00000000f56e556c EFLAGS: 00000296 ORIG_RAX: 0000000000000159
RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 0000000020002480
RDX: 0000000000000001 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: 5930 Comm: syz.3.146 Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
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:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
fail_dump lib/fault-inject.c:52 [inline]
should_fail_ex+0x497/0x5b0 lib/fault-inject.c:153
strncpy_from_user+0x38/0x320 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x7f/0x180 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+0x26/0x70 kernel/trace/bpf_trace.c:222
bpf_prog_bc7c5c6b9645592f+0x3d/0x3f
bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline]
__bpf_prog_run include/linux/filter.h:691 [inline]
bpf_prog_run include/linux/filter.h:698 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2406 [inline]
bpf_trace_run4+0x245/0x5a0 kernel/trace/bpf_trace.c:2449
__traceiter_sched_switch+0x6c/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x17cf/0x5490 kernel/sched/core.c:6526
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:wp512_process_buffer+0x429/0x3730 crypto/wp512.c:804
Code: c1 eb 38 89 84 24 b4 00 00 00 4c 63 f8 e8 ef c8 3d fd 48 8d 3c dd e0 e7 ab 8b 4c 8b 5c 24 68 48 89 f8 48 c1 e8 03 80 3c 28 00 <0f> 85 fa 18 00 00 48 8b 04 24 48 8b 1c dd e0 e7 ab 8b 48 c1 e8 30
RSP: 0018:ffffc9002700f5c8 EFLAGS: 00000246
RAX: 1ffffffff1757d61 RBX: 0000000000000065 RCX: ffffffff844d73cd
RDX: ffff888027938000 RSI: ffffffff844d5bd1 RDI: ffffffff8babeb08
RBP: dffffc0000000000 R08: 0000000000000005 R09: 000000000000000a
R10: 0000000000000002 R11: 6b5bb25945084e00 R12: fbb9d0780391b031
R13: 65d50485f7a170b8 R14: d172ce1641a7126c R15: 0000000000000002
wp512_update+0x2df/0x5c0 crypto/wp512.c:1031
shash_ahash_update+0x1ac/0x1f0 crypto/ahash.c:55
crypto_ahash_update+0x7b/0x110 crypto/ahash.c:333
hash_sendmsg+0x2af/0x1180 crypto/algif_hash.c:149
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0x9ae/0xb40 net/socket.c:2603
___sys_sendmsg+0x135/0x1e0 net/socket.c:2657
__sys_sendmmsg+0x2a5/0x450 net/socket.c:2736
__compat_sys_sendmmsg net/compat.c:360 [inline]
__do_compat_sys_sendmmsg net/compat.c:367 [inline]
__se_compat_sys_sendmmsg net/compat.c:364 [inline]
__ia32_compat_sys_sendmmsg+0x9d/0x100 net/compat.c:364
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf741e579
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:00000000f56e556c EFLAGS: 00000296 ORIG_RAX: 0000000000000159
RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 0000000020002480
RDX: 0000000000000001 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):
0: c1 eb 38 shr $0x38,%ebx
3: 89 84 24 b4 00 00 00 mov %eax,0xb4(%rsp)
a: 4c 63 f8 movslq %eax,%r15
d: e8 ef c8 3d fd call 0xfd3dc901
12: 48 8d 3c dd e0 e7 ab lea -0x74541820(,%rbx,8),%rdi
19: 8b
1a: 4c 8b 5c 24 68 mov 0x68(%rsp),%r11
1f: 48 89 f8 mov %rdi,%rax
22: 48 c1 e8 03 shr $0x3,%rax
26: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1)
* 2a: 0f 85 fa 18 00 00 jne 0x192a <-- trapping instruction
30: 48 8b 04 24 mov (%rsp),%rax
34: 48 8b 1c dd e0 e7 ab mov -0x74541820(,%rbx,8),%rbx
3b: 8b
3c: 48 c1 e8 30 shr $0x30,%rax