FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
======================================================
WARNING: possible circular locking dependency detected
6.12.0-syzkaller #0 Not tainted
------------------------------------------------------
syz.1.255/6669 is trying to acquire lock:
ffffffff8e813460 (console_owner){-.-.}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:342 [inline]
ffffffff8e813460 (console_owner){-.-.}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:267 [inline]
ffffffff8e813460 (console_owner){-.-.}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:288 [inline]
ffffffff8e813460 (console_owner){-.-.}-{0:0}, at: console_flush_all+0x1a3/0xeb0 kernel/printk/printk.c:3157
but task is already holding lock:
ffff8880b873ea98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 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}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
raw_spin_rq_lock kernel/sched/sched.h:1506 [inline]
task_rq_lock+0xc6/0x360 kernel/sched/core.c:700
cgroup_move_task+0x9b/0x5a0 kernel/sched/psi.c:1161
css_set_move_task+0x72e/0x950 kernel/cgroup/cgroup.c:898
cgroup_post_fork+0x256/0x880 kernel/cgroup/cgroup.c:6692
copy_process+0x39e9/0x3d50 kernel/fork.c:2600
kernel_clone+0x226/0x8f0 kernel/fork.c:2786
user_mode_thread+0x132/0x1a0 kernel/fork.c:2864
rest_init+0x23/0x300 init/main.c:712
start_kernel+0x47f/0x500 init/main.c:1105
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147
-> #3 (&p->pi_lock){-.-.}-{2:2}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
try_to_wake_up+0xbe/0x14b0 kernel/sched/core.c:4165
__wake_up_common kernel/sched/wait.c:89 [inline]
__wake_up_common_lock+0x130/0x1e0 kernel/sched/wait.c:106
tty_port_default_wakeup+0xa6/0xf0 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x6e2/0x930 drivers/tty/serial/8250/8250_port.c:1821
serial8250_handle_irq+0x630/0xb80 drivers/tty/serial/8250/8250_port.c:1929
serial8250_default_handle_irq+0xd1/0x1f0 drivers/tty/serial/8250/8250_port.c:1949
serial8250_interrupt+0xa9/0x1f0 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x29a/0xa80 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0x89/0x1f0 kernel/irq/handle.c:210
handle_edge_irq+0x25f/0xc20 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
handle_irq arch/x86/kernel/irq.c:247 [inline]
call_irq_handler arch/x86/kernel/irq.c:259 [inline]
__common_interrupt+0x136/0x230 arch/x86/kernel/irq.c:285
common_interrupt+0xb4/0xd0 arch/x86/kernel/irq.c:278
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111
acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702
cpuidle_enter_state+0x109/0x470 drivers/cpuidle/cpuidle.c:264
cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:385
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:230 [inline]
do_idle+0x375/0x5d0 kernel/sched/idle.c:326
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
rest_init+0x2dc/0x300 init/main.c:747
start_kernel+0x47f/0x500 init/main.c:1105
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147
-> #2 (&tty->write_wait){-.-.}-{2:2}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
__wake_up_common_lock+0x25/0x1e0 kernel/sched/wait.c:105
tty_port_default_wakeup+0xa6/0xf0 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x6e2/0x930 drivers/tty/serial/8250/8250_port.c:1821
serial8250_handle_irq+0x630/0xb80 drivers/tty/serial/8250/8250_port.c:1929
serial8250_default_handle_irq+0xd1/0x1f0 drivers/tty/serial/8250/8250_port.c:1949
serial8250_interrupt+0xa9/0x1f0 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x29a/0xa80 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0x89/0x1f0 kernel/irq/handle.c:210
handle_edge_irq+0x25f/0xc20 kernel/irq/chip.c:831
generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
handle_irq arch/x86/kernel/irq.c:247 [inline]
call_irq_handler arch/x86/kernel/irq.c:259 [inline]
__common_interrupt+0x136/0x230 arch/x86/kernel/irq.c:285
common_interrupt+0xb4/0xd0 arch/x86/kernel/irq.c:278
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111
acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702
cpuidle_enter_state+0x109/0x470 drivers/cpuidle/cpuidle.c:264
cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:385
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:230 [inline]
do_idle+0x375/0x5d0 kernel/sched/idle.c:326
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
rest_init+0x2dc/0x300 init/main.c:747
start_kernel+0x47f/0x500 init/main.c:1105
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147
-> #1 (&port_lock_key){-.-.}-{2:2}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
uart_port_lock_irqsave include/linux/serial_core.h:711 [inline]
serial8250_console_write+0x1a7/0x1ed0 drivers/tty/serial/8250/8250_port.c:3352
console_emit_next_record kernel/printk/printk.c:3092 [inline]
console_flush_all+0x86b/0xeb0 kernel/printk/printk.c:3180
__console_flush_and_unlock kernel/printk/printk.c:3239 [inline]
console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3279
vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2407
_printk+0xd5/0x120 kernel/printk/printk.c:2432
register_console+0xbf5/0xfd0 kernel/printk/printk.c:4069
univ8250_console_init+0x52/0x90 drivers/tty/serial/8250/8250_core.c:513
console_init+0x1b8/0x6f0 kernel/printk/printk.c:4262
start_kernel+0x2d8/0x500 init/main.c:1040
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147
-> #0 (console_owner){-.-.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
__lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
console_lock_spinning_enable kernel/printk/printk.c:1905 [inline]
console_emit_next_record kernel/printk/printk.c:3086 [inline]
console_flush_all+0x7f8/0xeb0 kernel/printk/printk.c:3180
__console_flush_and_unlock kernel/printk/printk.c:3239 [inline]
console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3279
vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2407
_printk+0xd5/0x120 kernel/printk/printk.c:2432
fail_dump lib/fault-inject.c:46 [inline]
should_fail_ex+0x391/0x4e0 lib/fault-inject.c:154
strncpy_from_user+0x36/0x260 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186
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+0xe9/0x180 kernel/trace/bpf_trace.c:306
bpf_prog_c1796171ffc7efef+0x3e/0x40
bpf_dispatcher_nop_func include/linux/bpf.h:1265 [inline]
__bpf_prog_run include/linux/filter.h:701 [inline]
bpf_prog_run include/linux/filter.h:708 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2316 [inline]
bpf_trace_run4+0x334/0x590 kernel/trace/bpf_trace.c:2359
__traceiter_sched_switch+0x98/0xd0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x22bb/0x4c30 kernel/sched/core.c:6690
preempt_schedule_notrace+0x100/0x140 kernel/sched/core.c:6965
preempt_schedule_notrace_thunk+0x1a/0x30 arch/x86/entry/thunk.S:13
rcu_is_watching+0x7e/0xb0 kernel/rcu/tree.c:738
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0xbf/0xa30 kernel/locking/lockdep.c:5836
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
percpu_ref_put_many include/linux/percpu-refcount.h:337 [inline]
percpu_ref_put include/linux/percpu-refcount.h:351 [inline]
css_put include/linux/cgroup_refcnt.h:79 [inline]
get_mm_memcg_path+0x288/0x380 mm/mmap_lock.c:83
__mmap_lock_do_trace_acquire_returned+0x9f/0x2f0 mm/mmap_lock.c:102
__mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline]
mmap_read_trylock include/linux/mmap_lock.h:164 [inline]
get_mmap_lock_carefully mm/memory.c:6114 [inline]
lock_mm_and_find_vma+0x213/0x2f0 mm/memory.c:6174
do_user_addr_fault arch/x86/mm/fault.c:1361 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x1bf/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:65
copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline]
copy_from_user_iter lib/iov_iter.c:55 [inline]
iterate_ubuf include/linux/iov_iter.h:30 [inline]
iterate_and_advance2 include/linux/iov_iter.h:300 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
__copy_from_iter lib/iov_iter.c:249 [inline]
_copy_from_iter+0x29a/0x1e70 lib/iov_iter.c:260
copy_from_iter include/linux/uio.h:219 [inline]
copy_from_iter_full include/linux/uio.h:236 [inline]
skb_do_copy_data_nocache include/net/sock.h:2171 [inline]
skb_copy_to_page_nocache include/net/sock.h:2197 [inline]
kcm_sendmsg+0xd2c/0x2a50 net/kcm/kcmsock.c:859
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:744
____sys_sendmsg+0x52a/0x7e0 net/socket.c:2607
___sys_sendmsg net/socket.c:2661 [inline]
__sys_sendmsg+0x292/0x380 net/socket.c:2690
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
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 ***
8 locks held by syz.1.255/6669:
#0: ffff88805f23bb28 (&kcm->tx_mutex){+.+.}-{3:3}, at: kcm_sendmsg+0x1e7/0x2a50 net/kcm/kcmsock.c:758
#1: ffff88805f23b6d8 (sk_lock-AF_KCM){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1611 [inline]
#1: ffff88805f23b6d8 (sk_lock-AF_KCM){+.+.}-{0:0}, at: kcm_sendmsg+0x1f1/0x2a50 net/kcm/kcmsock.c:759
#2: ffff88802fd8ea18 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:163 [inline]
#2: ffff88802fd8ea18 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:6114 [inline]
#2: ffff88802fd8ea18 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:6174
#3: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#3: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#3: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: percpu_ref_put_many include/linux/percpu-refcount.h:330 [inline]
#3: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: percpu_ref_put include/linux/percpu-refcount.h:351 [inline]
#3: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: css_put include/linux/cgroup_refcnt.h:79 [inline]
#3: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: get_mm_memcg_path+0x110/0x380 mm/mmap_lock.c:83
#4: ffff8880b873ea98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
#5: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#5: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#5: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2315 [inline]
#5: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x244/0x590 kernel/trace/bpf_trace.c:2359
#6: ffffffff8e8134c0 (console_lock){+.+.}-{0:0}, at: _printk+0xd5/0x120 kernel/printk/printk.c:2432
#7: ffffffff8e8130d0 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:342 [inline]
#7: ffffffff8e8130d0 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:267 [inline]
#7: ffffffff8e8130d0 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:288 [inline]
#7: ffffffff8e8130d0 (console_srcu){....}-{0:0}, at: console_flush_all+0x1a3/0xeb0 kernel/printk/printk.c:3157
stack backtrace:
CPU: 1 UID: 0 PID: 6669 Comm: syz.1.255 Not tainted 6.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
__lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
console_lock_spinning_enable kernel/printk/printk.c:1905 [inline]
console_emit_next_record kernel/printk/printk.c:3086 [inline]
console_flush_all+0x7f8/0xeb0 kernel/printk/printk.c:3180
__console_flush_and_unlock kernel/printk/printk.c:3239 [inline]
console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3279
vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2407
_printk+0xd5/0x120 kernel/printk/printk.c:2432
fail_dump lib/fault-inject.c:46 [inline]
should_fail_ex+0x391/0x4e0 lib/fault-inject.c:154
strncpy_from_user+0x36/0x260 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186
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+0xe9/0x180 kernel/trace/bpf_trace.c:306
bpf_prog_c1796171ffc7efef+0x3e/0x40
bpf_dispatcher_nop_func include/linux/bpf.h:1265 [inline]
__bpf_prog_run include/linux/filter.h:701 [inline]
bpf_prog_run include/linux/filter.h:708 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2316 [inline]
bpf_trace_run4+0x334/0x590 kernel/trace/bpf_trace.c:2359
__traceiter_sched_switch+0x98/0xd0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x22bb/0x4c30 kernel/sched/core.c:6690
preempt_schedule_notrace+0x100/0x140 kernel/sched/core.c:6965
preempt_schedule_notrace_thunk+0x1a/0x30 arch/x86/entry/thunk.S:13
rcu_is_watching+0x7e/0xb0 kernel/rcu/tree.c:738
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0xbf/0xa30 kernel/locking/lockdep.c:5836
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
percpu_ref_put_many include/linux/percpu-refcount.h:337 [inline]
percpu_ref_put include/linux/percpu-refcount.h:351 [inline]
css_put include/linux/cgroup_refcnt.h:79 [inline]
get_mm_memcg_path+0x288/0x380 mm/mmap_lock.c:83
__mmap_lock_do_trace_acquire_returned+0x9f/0x2f0 mm/mmap_lock.c:102
__mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline]
mmap_read_trylock include/linux/mmap_lock.h:164 [inline]
get_mmap_lock_carefully mm/memory.c:6114 [inline]
lock_mm_and_find_vma+0x213/0x2f0 mm/memory.c:6174
do_user_addr_fault arch/x86/mm/fault.c:1361 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x1bf/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 a4 c3 cc cc cc cc 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1
RSP: 0018:ffffc90004bff718 EFLAGS: 00050206
RAX: ffffffff84bb6b01 RBX: 0000000000008000 RCX: 0000000000004880
RDX: 0000000000000001 RSI: 0000000020024000 RDI: ffff8880325d3780
RBP: ffffc90004bff890 R08: ffff8880325d7fff R09: 1ffff110064bafff
R10: dffffc0000000000 R11: ffffed10064bb000 R12: ffffc90004bffe18
R13: 0000000020020880 R14: ffff8880325d0000 R15: 1ffff9200097ffc3
copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline]
copy_from_user_iter lib/iov_iter.c:55 [inline]
iterate_ubuf include/linux/iov_iter.h:30 [inline]
iterate_and_advance2 include/linux/iov_iter.h:300 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
__copy_from_iter lib/iov_iter.c:249 [inline]
_copy_from_iter+0x29a/0x1e70 lib/iov_iter.c:260
copy_from_iter include/linux/uio.h:219 [inline]
copy_from_iter_full include/linux/uio.h:236 [inline]
skb_do_copy_data_nocache include/net/sock.h:2171 [inline]
skb_copy_to_page_nocache include/net/sock.h:2197 [inline]
kcm_sendmsg+0xd2c/0x2a50 net/kcm/kcmsock.c:859
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:744
____sys_sendmsg+0x52a/0x7e0 net/socket.c:2607
___sys_sendmsg net/socket.c:2661 [inline]
__sys_sendmsg+0x292/0x380 net/socket.c:2690
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8643d7e819
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:00007f8644bc5038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f8643f35fa0 RCX: 00007f8643d7e819
RDX: 0000000000000000 RSI: 0000000020002080 RDI: 0000000000000003
RBP: 00007f8644bc5090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 00007f8643f35fa0 R15: 00007ffcf58bff68
CPU: 1 UID: 0 PID: 6669 Comm: syz.1.255 Not tainted 6.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
fail_dump lib/fault-inject.c:53 [inline]
should_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:154
strncpy_from_user+0x36/0x260 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186
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+0xe9/0x180 kernel/trace/bpf_trace.c:306
bpf_prog_c1796171ffc7efef+0x3e/0x40
bpf_dispatcher_nop_func include/linux/bpf.h:1265 [inline]
__bpf_prog_run include/linux/filter.h:701 [inline]
bpf_prog_run include/linux/filter.h:708 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2316 [inline]
bpf_trace_run4+0x334/0x590 kernel/trace/bpf_trace.c:2359
__traceiter_sched_switch+0x98/0xd0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x22bb/0x4c30 kernel/sched/core.c:6690
preempt_schedule_notrace+0x100/0x140 kernel/sched/core.c:6965
preempt_schedule_notrace_thunk+0x1a/0x30 arch/x86/entry/thunk.S:13
rcu_is_watching+0x7e/0xb0 kernel/rcu/tree.c:738
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0xbf/0xa30 kernel/locking/lockdep.c:5836
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
percpu_ref_put_many include/linux/percpu-refcount.h:337 [inline]
percpu_ref_put include/linux/percpu-refcount.h:351 [inline]
css_put include/linux/cgroup_refcnt.h:79 [inline]
get_mm_memcg_path+0x288/0x380 mm/mmap_lock.c:83
__mmap_lock_do_trace_acquire_returned+0x9f/0x2f0 mm/mmap_lock.c:102
__mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline]
mmap_read_trylock include/linux/mmap_lock.h:164 [inline]
get_mmap_lock_carefully mm/memory.c:6114 [inline]
lock_mm_and_find_vma+0x213/0x2f0 mm/memory.c:6174
do_user_addr_fault arch/x86/mm/fault.c:1361 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x1bf/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 a4 c3 cc cc cc cc 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1
RSP: 0018:ffffc90004bff718 EFLAGS: 00050206
RAX: ffffffff84bb6b01 RBX: 0000000000008000 RCX: 0000000000004880
RDX: 0000000000000001 RSI: 0000000020024000 RDI: ffff8880325d3780
RBP: ffffc90004bff890 R08: ffff8880325d7fff R09: 1ffff110064bafff
R10: dffffc0000000000 R11: ffffed10064bb000 R12: ffffc90004bffe18
R13: 0000000020020880 R14: ffff8880325d0000 R15: 1ffff9200097ffc3
copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline]
copy_from_user_iter lib/iov_iter.c:55 [inline]
iterate_ubuf include/linux/iov_iter.h:30 [inline]
iterate_and_advance2 include/linux/iov_iter.h:300 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
__copy_from_iter lib/iov_iter.c:249 [inline]
_copy_from_iter+0x29a/0x1e70 lib/iov_iter.c:260
copy_from_iter include/linux/uio.h:219 [inline]
copy_from_iter_full include/linux/uio.h:236 [inline]
skb_do_copy_data_nocache include/net/sock.h:2171 [inline]
skb_copy_to_page_nocache include/net/sock.h:2197 [inline]
kcm_sendmsg+0xd2c/0x2a50 net/kcm/kcmsock.c:859
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:744
____sys_sendmsg+0x52a/0x7e0 net/socket.c:2607
___sys_sendmsg net/socket.c:2661 [inline]
__sys_sendmsg+0x292/0x380 net/socket.c:2690
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8643d7e819
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:00007f8644bc5038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f8643f35fa0 RCX: 00007f8643d7e819
RDX: 0000000000000000 RSI: 0000000020002080 RDI: 0000000000000003
RBP: 00007f8644bc5090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 00007f8643f35fa0 R15: 00007ffcf58bff68
----------------
Code disassembly (best guess):
0: 75 f1 jne 0xfffffff3
2: c3 ret
3: cc int3
4: cc int3
5: cc int3
6: cc int3
7: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1)
e: 00 00
10: 48 8b 06 mov (%rsi),%rax
13: 48 89 07 mov %rax,(%rdi)
16: 48 83 c6 08 add $0x8,%rsi
1a: 48 83 c7 08 add $0x8,%rdi
1e: 83 e9 08 sub $0x8,%ecx
21: 74 df je 0x2
23: 83 f9 08 cmp $0x8,%ecx
26: 73 e8 jae 0x10
28: eb c9 jmp 0xfffffff3
* 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction
2c: c3 ret
2d: cc int3
2e: cc int3
2f: cc int3
30: cc int3
31: 48 89 c8 mov %rcx,%rax
34: 48 c1 e9 03 shr $0x3,%rcx
38: 83 e0 07 and $0x7,%eax
3b: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi)
3e: 89 c1 mov %eax,%ecx