FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
======================================================
WARNING: possible circular locking dependency detected
6.14.0-syzkaller-13546-g16cd1c265776 #0 Not tainted
------------------------------------------------------
syz.2.283/7093 is trying to acquire lock:
ffffffff8e2ce9c0 (console_owner){-.-.}-{0:0}, at: console_trylock_spinning kernel/printk/printk.c:2048 [inline]
ffffffff8e2ce9c0 (console_owner){-.-.}-{0:0}, at: vprintk_emit+0x4d4/0x6d0 kernel/printk/printk.c:2449
but task is already holding lock:
ffff88802b239f18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:613 [inline]
ffff88802b239f18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:598
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (&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:605
raw_spin_rq_lock kernel/sched/sched.h:1513 [inline]
task_rq_lock+0xcf/0x490 kernel/sched/core.c:707
cgroup_move_task+0x81/0x2a0 kernel/sched/psi.c:1161
css_set_move_task+0x288/0x5f0 kernel/cgroup/cgroup.c:911
cgroup_post_fork+0x201/0x9d0 kernel/cgroup/cgroup.c:6709
copy_process+0x5006/0x91a0 kernel/fork.c:2658
kernel_clone+0xfc/0x960 kernel/fork.c:2844
user_mode_thread+0xc7/0x110 kernel/fork.c:2922
rest_init+0x23/0x2b0 init/main.c:708
start_kernel+0x3e9/0x4d0 init/main.c:1099
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:513
x86_64_start_kernel+0xb0/0xc0 arch/x86/kernel/head64.c:494
common_startup_64+0x13e/0x148
-> #3 (&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:557 [inline]
try_to_wake_up+0xb2/0x1680 kernel/sched/core.c:4212
__wake_up_common+0x132/0x1f0 kernel/sched/wait.c:89
__wake_up_common_lock kernel/sched/wait.c:106 [inline]
__wake_up+0x31/0x60 kernel/sched/wait.c:127
tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1842
serial8250_handle_irq+0x761/0xcb0 drivers/tty/serial/8250/8250_port.c:1950
serial8250_default_handle_irq+0x9a/0x210 drivers/tty/serial/8250/8250_port.c:1970
serial8250_interrupt+0x103/0x210 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x229/0x7d0 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x263/0xd10 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
handle_irq arch/x86/kernel/irq.c:254 [inline]
call_irq_handler arch/x86/kernel/irq.c:266 [inline]
__common_interrupt+0xdf/0x250 arch/x86/kernel/irq.c:292
common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:285
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:80
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:748
default_idle_call+0x6d/0xb0 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x391/0x510 kernel/sched/idle.c:325
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:423
start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x148
-> #2 (&tty->write_wait){-.-.}-{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
__wake_up_common_lock kernel/sched/wait.c:105 [inline]
__wake_up+0x1c/0x60 kernel/sched/wait.c:127
tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1842
__start_tx+0x3e9/0x4a0 drivers/tty/serial/8250/8250_port.c:1547
serial8250_start_tx+0x368/0x530 drivers/tty/serial/8250/8250_port.c:1657
__uart_start+0x292/0x4c0 drivers/tty/serial/serial_core.c:160
uart_write+0x218/0xb30 drivers/tty/serial/serial_core.c:635
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:1015 [inline]
file_tty_write.constprop.0+0x4ff/0x9b0 drivers/tty/tty_io.c:1090
tty_write drivers/tty/tty_io.c:1111 [inline]
redirected_tty_write drivers/tty/tty_io.c:1134 [inline]
redirected_tty_write+0xd4/0x150 drivers/tty/tty_io.c:1114
new_sync_write fs/read_write.c:591 [inline]
vfs_write+0x5ba/0x1180 fs/read_write.c:684
ksys_write+0x12a/0x240 fs/read_write.c:736
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 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:715 [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:1034
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:513
x86_64_start_kernel+0xb0/0xc0 arch/x86/kernel/head64.c:494
common_startup_64+0x13e/0x148
-> #0 (console_owner){-.-.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3166 [inline]
check_prevs_add kernel/locking/lockdep.c:3285 [inline]
validate_chain kernel/locking/lockdep.c:3909 [inline]
__lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235
lock_acquire kernel/locking/lockdep.c:5866 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823
console_trylock_spinning kernel/printk/printk.c:2048 [inline]
vprintk_emit+0x4e5/0x6d0 kernel/printk/printk.c:2449
_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
__copy_to_user_inatomic include/linux/uaccess.h:132 [inline]
copy_to_user_nofault+0xac/0x190 mm/maccess.c:156
____bpf_probe_write_user kernel/trace/bpf_trace.c:348 [inline]
bpf_probe_write_user+0xaf/0xf0 kernel/trace/bpf_trace.c:326
bpf_prog_6303d92f98284ad8+0x44/0x48
bpf_dispatcher_nop_func include/linux/bpf.h:1316 [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:2363 [inline]
bpf_trace_run4+0x249/0x5a0 kernel/trace/bpf_trace.c:2406
__bpf_trace_sched_switch+0x145/0x190 include/trace/events/sched.h:220
__traceiter_sched_switch+0x6c/0xc0 include/trace/events/sched.h:220
__do_trace_sched_switch include/trace/events/sched.h:220 [inline]
trace_sched_switch include/trace/events/sched.h:220 [inline]
__schedule+0x1bf3/0x5de0 kernel/sched/core.c:6764
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7090
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5831
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
is_module_text_address+0x33/0x230 kernel/module/main.c:3743
kernel_text_address kernel/extable.c:119 [inline]
kernel_text_address+0x81/0x100 kernel/extable.c:94
__kernel_text_address+0xd/0x40 kernel/extable.c:79
unwind_get_return_address+0x59/0xa0 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0xa6/0x100 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4331 [inline]
__kmalloc_node_track_caller_noprof+0x221/0x510 mm/slub.c:4350
memdup_user+0x2a/0xe0 mm/util.c:220
strndup_user+0x78/0xe0 mm/util.c:279
copy_mount_string fs/namespace.c:4114 [inline]
__do_sys_mount fs/namespace.c:4415 [inline]
__se_sys_mount fs/namespace.c:4407 [inline]
__ia32_sys_mount+0x137/0x310 fs/namespace.c:4407
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x73/0x120 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 --> &p->pi_lock --> &rq->__lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rq->__lock);
lock(&p->pi_lock);
lock(&rq->__lock);
lock(console_owner);
*** DEADLOCK ***
3 locks held by syz.2.283/7093:
#0: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
#0: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: is_module_text_address+0x1f/0x230 kernel/module/main.c:3743
#1: ffff88802b239f18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:613 [inline]
#1: ffff88802b239f18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:598
#2: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#2: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#2: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2362 [inline]
#2: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run4+0x1cf/0x5a0 kernel/trace/bpf_trace.c:2406
stack backtrace:
CPU: 1 UID: 0 PID: 7093 Comm: syz.2.283 Not tainted 6.14.0-syzkaller-13546-g16cd1c265776 #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:2079
check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2211
check_prev_add kernel/locking/lockdep.c:3166 [inline]
check_prevs_add kernel/locking/lockdep.c:3285 [inline]
validate_chain kernel/locking/lockdep.c:3909 [inline]
__lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235
lock_acquire kernel/locking/lockdep.c:5866 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823
console_trylock_spinning kernel/printk/printk.c:2048 [inline]
vprintk_emit+0x4e5/0x6d0 kernel/printk/printk.c:2449
_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
__copy_to_user_inatomic include/linux/uaccess.h:132 [inline]
copy_to_user_nofault+0xac/0x190 mm/maccess.c:156
____bpf_probe_write_user kernel/trace/bpf_trace.c:348 [inline]
bpf_probe_write_user+0xaf/0xf0 kernel/trace/bpf_trace.c:326
bpf_prog_6303d92f98284ad8+0x44/0x48
bpf_dispatcher_nop_func include/linux/bpf.h:1316 [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:2363 [inline]
bpf_trace_run4+0x249/0x5a0 kernel/trace/bpf_trace.c:2406
__bpf_trace_sched_switch+0x145/0x190 include/trace/events/sched.h:220
__traceiter_sched_switch+0x6c/0xc0 include/trace/events/sched.h:220
__do_trace_sched_switch include/trace/events/sched.h:220 [inline]
trace_sched_switch include/trace/events/sched.h:220 [inline]
__schedule+0x1bf3/0x5de0 kernel/sched/core.c:6764
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7090
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5870
Code: 51 0e 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 22 54 ee 0e 0f 82 74 02 00 00 8b 35 7a 83 ee 0e 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 f9 50 0e 12 0f 85 c7 02 00 00 48 83 c4
RSP: 0018:ffffc90007907960 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e3c1580 RCX: 00000000ef9d33e4
RDX: 0000000000000000 RSI: ffffffff8dbc557f RDI: ffffffff8bf45180
RBP: 0000000000000002 R08: 0ac0d5affe09d4ff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
is_module_text_address+0x33/0x230 kernel/module/main.c:3743
kernel_text_address kernel/extable.c:119 [inline]
kernel_text_address+0x81/0x100 kernel/extable.c:94
__kernel_text_address+0xd/0x40 kernel/extable.c:79
unwind_get_return_address+0x59/0xa0 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0xa6/0x100 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4331 [inline]
__kmalloc_node_track_caller_noprof+0x221/0x510 mm/slub.c:4350
memdup_user+0x2a/0xe0 mm/util.c:220
strndup_user+0x78/0xe0 mm/util.c:279
copy_mount_string fs/namespace.c:4114 [inline]
__do_sys_mount fs/namespace.c:4415 [inline]
__se_sys_mount fs/namespace.c:4407 [inline]
__ia32_sys_mount+0x137/0x310 fs/namespace.c:4407
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x73/0x120 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: 0023:0xf7f42579
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:00000000f502455c EFLAGS: 00000296 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 0000000080000040 RCX: 00000000800000c0
RDX: 0000000080000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
CPU: 1 UID: 0 PID: 7093 Comm: syz.2.283 Not tainted 6.14.0-syzkaller-13546-g16cd1c265776 #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
__copy_to_user_inatomic include/linux/uaccess.h:132 [inline]
copy_to_user_nofault+0xac/0x190 mm/maccess.c:156
____bpf_probe_write_user kernel/trace/bpf_trace.c:348 [inline]
bpf_probe_write_user+0xaf/0xf0 kernel/trace/bpf_trace.c:326
bpf_prog_6303d92f98284ad8+0x44/0x48
bpf_dispatcher_nop_func include/linux/bpf.h:1316 [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:2363 [inline]
bpf_trace_run4+0x249/0x5a0 kernel/trace/bpf_trace.c:2406
__bpf_trace_sched_switch+0x145/0x190 include/trace/events/sched.h:220
__traceiter_sched_switch+0x6c/0xc0 include/trace/events/sched.h:220
__do_trace_sched_switch include/trace/events/sched.h:220 [inline]
trace_sched_switch include/trace/events/sched.h:220 [inline]
__schedule+0x1bf3/0x5de0 kernel/sched/core.c:6764
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7090
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5870
Code: 51 0e 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 22 54 ee 0e 0f 82 74 02 00 00 8b 35 7a 83 ee 0e 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 f9 50 0e 12 0f 85 c7 02 00 00 48 83 c4
RSP: 0018:ffffc90007907960 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e3c1580 RCX: 00000000ef9d33e4
RDX: 0000000000000000 RSI: ffffffff8dbc557f RDI: ffffffff8bf45180
RBP: 0000000000000002 R08: 0ac0d5affe09d4ff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
is_module_text_address+0x33/0x230 kernel/module/main.c:3743
kernel_text_address kernel/extable.c:119 [inline]
kernel_text_address+0x81/0x100 kernel/extable.c:94
__kernel_text_address+0xd/0x40 kernel/extable.c:79
unwind_get_return_address+0x59/0xa0 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0xa6/0x100 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4331 [inline]
__kmalloc_node_track_caller_noprof+0x221/0x510 mm/slub.c:4350
memdup_user+0x2a/0xe0 mm/util.c:220
strndup_user+0x78/0xe0 mm/util.c:279
copy_mount_string fs/namespace.c:4114 [inline]
__do_sys_mount fs/namespace.c:4415 [inline]
__se_sys_mount fs/namespace.c:4407 [inline]
__ia32_sys_mount+0x137/0x310 fs/namespace.c:4407
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x73/0x120 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: 0023:0xf7f42579
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:00000000f502455c EFLAGS: 00000296 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 0000000080000040 RCX: 00000000800000c0
RDX: 0000000080000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
syz.2.283: attempt to access beyond end of device
nbd2: rw=4096, sector=0, nr_sectors = 1 limit=0
XFS (nbd2): SB validate failed with error -5.
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 12 83 f8 07 0f 87 adc -0x78f0f808(%rbx),%al
6: bc 02 00 00 89 mov $0x89000002,%esp
b: c0 48 0f a3 rorb $0xa3,0xf(%rax)
f: 05 22 54 ee 0e add $0xeee5422,%eax
14: 0f 82 74 02 00 00 jb 0x28e
1a: 8b 35 7a 83 ee 0e mov 0xeee837a(%rip),%esi # 0xeee839a
20: 85 f6 test %esi,%esi
22: 0f 85 8d 00 00 00 jne 0xb5
* 28: 48 8b 44 24 30 mov 0x30(%rsp),%rax <-- trapping instruction
2d: 65 48 2b 05 f9 50 0e sub %gs:0x120e50f9(%rip),%rax # 0x120e512e
34: 12
35: 0f 85 c7 02 00 00 jne 0x302
3b: 48 rex.W
3c: 83 .byte 0x83
3d: c4 .byte 0xc4