FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
======================================================
WARNING: possible circular locking dependency detected
6.1.147-syzkaller #0 Not tainted
------------------------------------------------------
syz.0.2037/10594 is trying to acquire lock:
ffffffff8cb1efc0 (console_owner){-...}-{0:0}, at: console_lock_spinning_enable kernel/printk/printk.c:1818 [inline]
ffffffff8cb1efc0 (console_owner){-...}-{0:0}, at: console_emit_next_record+0x82d/0xc90 kernel/printk/printk.c:2774
but task is already holding lock:
ffff8880b8e3aa98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
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+0x2e/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
raw_spin_rq_lock kernel/sched/sched.h:1355 [inline]
rq_lock kernel/sched/sched.h:1645 [inline]
task_fork_fair+0x5c/0x350 kernel/sched/fair.c:11888
sched_cgroup_fork+0x32c/0x3c0 kernel/sched/core.c:4685
copy_process+0x24b8/0x4020 kernel/fork.c:2459
kernel_clone+0x225/0x8b0 kernel/fork.c:2757
user_mode_thread+0xda/0x130 kernel/fork.c:2833
rest_init+0x23/0x300 init/main.c:698
start_kernel+0x0/0x539 init/main.c:893
start_kernel+0x490/0x539 init/main.c:1140
secondary_startup_64_no_verify+0xcf/0xdb
-> #3 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa4/0xf0 kernel/locking/spinlock.c:162
try_to_wake_up+0x5c/0x1080 kernel/sched/core.c:4111
__wake_up_common+0x2a4/0x4e0 kernel/sched/wait.c:107
__wake_up_common_lock kernel/sched/wait.c:138 [inline]
__wake_up+0x10e/0x190 kernel/sched/wait.c:160
tty_port_default_wakeup+0x9e/0xf0 drivers/tty/tty_port.c:71
serial8250_tx_chars+0x629/0x830 drivers/tty/serial/8250/8250_port.c:1854
serial8250_handle_irq+0x516/0x6d0 drivers/tty/serial/8250/8250_port.c:1961
serial8250_default_handle_irq+0xb4/0x1a0 drivers/tty/serial/8250/8250_port.c:1981
serial8250_interrupt+0x9b/0x1c0 drivers/tty/serial/8250/8250_core.c:126
__handle_irq_event_percpu+0x298/0xa30 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0x87/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x243/0xb20 kernel/irq/chip.c:819
generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
handle_irq arch/x86/kernel/irq.c:233 [inline]
__common_interrupt+0xd7/0x1e0 arch/x86/kernel/irq.c:252
common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:242
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:682
check_kcov_mode kernel/kcov.c:184 [inline]
__sanitizer_cov_trace_pc+0x32/0x60 kernel/kcov.c:216
mas_next_entry+0x1e3/0xea0 lib/maple_tree.c:4831
validate_mm_mt+0x167/0x420 mm/mmap.c:295
validate_mm+0xcc/0x2b0 mm/mmap.c:331
__vma_adjust+0x17bf/0x1c50 mm/mmap.c:878
vma_adjust include/linux/mm.h:2745 [inline]
__split_vma+0x3a7/0x500 mm/mmap.c:-1
mprotect_fixup+0x597/0x7f0 mm/mprotect.c:623
do_mprotect_pkey+0x754/0xa40 mm/mprotect.c:792
__do_sys_mprotect mm/mprotect.c:819 [inline]
__se_sys_mprotect mm/mprotect.c:816 [inline]
__x64_sys_mprotect+0x7c/0x90 mm/mprotect.c:816
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
-> #2 (&tty->write_wait){-...}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa4/0xf0 kernel/locking/spinlock.c:162
__wake_up_common_lock kernel/sched/wait.c:137 [inline]
__wake_up+0xf4/0x190 kernel/sched/wait.c:160
tty_port_default_wakeup+0x9e/0xf0 drivers/tty/tty_port.c:71
serial8250_tx_chars+0x629/0x830 drivers/tty/serial/8250/8250_port.c:1854
serial8250_handle_irq+0x516/0x6d0 drivers/tty/serial/8250/8250_port.c:1961
serial8250_default_handle_irq+0xb4/0x1a0 drivers/tty/serial/8250/8250_port.c:1981
serial8250_interrupt+0x9b/0x1c0 drivers/tty/serial/8250/8250_core.c:126
__handle_irq_event_percpu+0x298/0xa30 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0x87/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x243/0xb20 kernel/irq/chip.c:819
generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
handle_irq arch/x86/kernel/irq.c:233 [inline]
__common_interrupt+0xd7/0x1e0 arch/x86/kernel/irq.c:252
common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:242
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:682
native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
default_idle+0xb/0x10 arch/x86/kernel/process.c:741
default_idle_call+0x84/0xc0 kernel/sched/idle.c:109
cpuidle_idle_call kernel/sched/idle.c:191 [inline]
do_idle+0x1fc/0x570 kernel/sched/idle.c:303
cpu_startup_entry+0x3f/0x60 kernel/sched/idle.c:401
rest_init+0x2dc/0x300 init/main.c:733
start_kernel+0x0/0x539 init/main.c:893
start_kernel+0x490/0x539 init/main.c:1140
secondary_startup_64_no_verify+0xcf/0xdb
-> #1 (&port_lock_key){-...}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa4/0xf0 kernel/locking/spinlock.c:162
serial8250_console_write+0x169/0x17a0 drivers/tty/serial/8250/8250_port.c:3433
call_console_driver kernel/printk/printk.c:1977 [inline]
console_emit_next_record+0x947/0xc90 kernel/printk/printk.c:2777
console_flush_all kernel/printk/printk.c:-1 [inline]
console_unlock+0x223/0x630 kernel/printk/printk.c:2906
vprintk_emit+0x489/0x680 kernel/printk/printk.c:2303
_printk+0xcc/0x110 kernel/printk/printk.c:2328
register_console+0x6c6/0x9c0 kernel/printk/printk.c:3269
univ8250_console_init+0x41/0x43 drivers/tty/serial/8250/8250_core.c:687
console_init+0x1bc/0x78e kernel/printk/printk.c:3359
start_kernel+0x303/0x539 init/main.c:1076
secondary_startup_64_no_verify+0xcf/0xdb
-> #0 (console_owner){-...}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain kernel/locking/lockdep.c:3825 [inline]
__lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049
lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
console_lock_spinning_enable kernel/printk/printk.c:1818 [inline]
console_emit_next_record+0x84c/0xc90 kernel/printk/printk.c:2774
console_flush_all kernel/printk/printk.c:-1 [inline]
console_unlock+0x223/0x630 kernel/printk/printk.c:2906
vprintk_emit+0x489/0x680 kernel/printk/printk.c:2303
_printk+0xcc/0x110 kernel/printk/printk.c:2328
fail_dump lib/fault-inject.c:45 [inline]
should_fail_ex+0x37a/0x4d0 lib/fault-inject.c:147
strncpy_from_user+0x32/0x350 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x6d/0x140 mm/maccess.c:186
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:204 [inline]
____bpf_probe_read_user_str kernel/trace/bpf_trace.c:213 [inline]
bpf_probe_read_user_str+0x26/0x70 kernel/trace/bpf_trace.c:210
bpf_prog_bc7c5c6b9645592f+0x35/0x37
bpf_dispatcher_nop_func include/linux/bpf.h:1001 [inline]
__bpf_prog_run include/linux/filter.h:603 [inline]
bpf_prog_run include/linux/filter.h:610 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2285 [inline]
bpf_trace_run4+0x1f5/0x420 kernel/trace/bpf_trace.c:2326
__traceiter_sched_switch+0x8f/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x1d18/0x40b0 kernel/sched/core.c:6558
preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
__inline_bsearch include/linux/bsearch.h:20 [inline]
bsearch+0x67/0xb0 lib/bsearch.c:33
search_extable+0x8c/0xd0 lib/extable.c:116
search_kernel_exception_table kernel/extable.c:49 [inline]
search_exception_tables+0x36/0x60 kernel/extable.c:58
fixup_exception+0xaa/0x1c40 arch/x86/mm/extable.c:225
kernelmode_fixup_or_oops+0x6c/0xd0 arch/x86/mm/fault.c:740
__bad_area_nosemaphore+0x118/0x740 arch/x86/mm/fault.c:797
handle_page_fault arch/x86/mm/fault.c:1431 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1487
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
copy_user_short_string+0x22/0x40 arch/x86/lib/copy_user_64.S:241
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
_copy_from_user+0xf4/0x170 lib/usercopy.c:23
copy_from_user include/linux/uaccess.h:161 [inline]
____sys_sendmsg+0x2d5/0x970 net/socket.c:2496
___sys_sendmsg+0x21c/0x290 net/socket.c:2573
__sys_sendmsg net/socket.c:2602 [inline]
__do_sys_sendmsg net/socket.c:2611 [inline]
__se_sys_sendmsg+0x19e/0x270 net/socket.c:2609
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
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.0.2037/10594:
#0: ffff8880b8e3aa98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
#1: ffffffff8cb2ae20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#1: ffffffff8cb2ae20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#1: ffffffff8cb2ae20 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2284 [inline]
#1: ffffffff8cb2ae20 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0xf9/0x420 kernel/trace/bpf_trace.c:2326
#2: ffffffff8cb1f0a0 (console_lock){+.+.}-{0:0}, at: _printk+0xcc/0x110 kernel/printk/printk.c:2328
stack backtrace:
CPU: 0 PID: 10594 Comm: syz.0.2037 Not tainted 6.1.147-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2170
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain kernel/locking/lockdep.c:3825 [inline]
__lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049
lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
console_lock_spinning_enable kernel/printk/printk.c:1818 [inline]
console_emit_next_record+0x84c/0xc90 kernel/printk/printk.c:2774
console_flush_all kernel/printk/printk.c:-1 [inline]
console_unlock+0x223/0x630 kernel/printk/printk.c:2906
vprintk_emit+0x489/0x680 kernel/printk/printk.c:2303
_printk+0xcc/0x110 kernel/printk/printk.c:2328
fail_dump lib/fault-inject.c:45 [inline]
should_fail_ex+0x37a/0x4d0 lib/fault-inject.c:147
strncpy_from_user+0x32/0x350 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x6d/0x140 mm/maccess.c:186
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:204 [inline]
____bpf_probe_read_user_str kernel/trace/bpf_trace.c:213 [inline]
bpf_probe_read_user_str+0x26/0x70 kernel/trace/bpf_trace.c:210
bpf_prog_bc7c5c6b9645592f+0x35/0x37
bpf_dispatcher_nop_func include/linux/bpf.h:1001 [inline]
__bpf_prog_run include/linux/filter.h:603 [inline]
bpf_prog_run include/linux/filter.h:610 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2285 [inline]
bpf_trace_run4+0x1f5/0x420 kernel/trace/bpf_trace.c:2326
__traceiter_sched_switch+0x8f/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x1d18/0x40b0 kernel/sched/core.c:6558
preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__inline_bsearch include/linux/bsearch.h:20 [inline]
RIP: 0010:bsearch+0x67/0xb0 lib/bsearch.c:33
Code: 89 ef 48 89 ee ff 14 24 89 c3 31 ff 89 c6 e8 70 6b 7b fd 85 db 74 31 31 ff 89 de e8 63 6b 7b fd 4c 01 f5 31 c0 85 db 0f 9f c0 <4c> 0f 4f e5 49 29 c7 49 83 ff 02 72 18 49 d1 ef e8 e4 67 7b fd eb
RSP: 0018:ffffc9000d9a7560 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88805467d940 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8c76d190 R08: ffffffff8a01b9d0 R09: ffffed10060ece2e
R10: ffffed10060ece2e R11: 1ffff110060ece2d R12: ffffffff8c76a0a0
R13: ffffc9000d9a75c0 R14: 000000000000000c R15: 0000000000000826
search_extable+0x8c/0xd0 lib/extable.c:116
search_kernel_exception_table kernel/extable.c:49 [inline]
search_exception_tables+0x36/0x60 kernel/extable.c:58
fixup_exception+0xaa/0x1c40 arch/x86/mm/extable.c:225
kernelmode_fixup_or_oops+0x6c/0xd0 arch/x86/mm/fault.c:740
__bad_area_nosemaphore+0x118/0x740 arch/x86/mm/fault.c:797
handle_page_fault arch/x86/mm/fault.c:1431 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1487
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0010:copy_user_short_string+0x22/0x40 arch/x86/lib/copy_user_64.S:242
Code: e7 90 90 90 90 90 90 90 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 4c 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 <8a> 06 88 07 48 ff c6 48 ff c7 ff c9 75 f2 31 c0 0f 01 ca c3 8d 14
RSP: 0018:ffffc9000d9a7a08 EFLAGS: 00050202
RAX: ffffffff84067401 RBX: 0000000000000007 RCX: 0000000000000007
RDX: 0000000000000007 RSI: 0000000000000000 RDI: ffffc9000d9a7ac0
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff52001b34f59
R10: fffff52001b34f59 R11: 1ffff92001b34f58 R12: 00007fffffffeff9
R13: 0000000000000000 R14: ffffc9000d9a7ac0 R15: 0000000000000000
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
_copy_from_user+0xf4/0x170 lib/usercopy.c:23
copy_from_user include/linux/uaccess.h:161 [inline]
____sys_sendmsg+0x2d5/0x970 net/socket.c:2496
___sys_sendmsg+0x21c/0x290 net/socket.c:2573
__sys_sendmsg net/socket.c:2602 [inline]
__do_sys_sendmsg net/socket.c:2611 [inline]
__se_sys_sendmsg+0x19e/0x270 net/socket.c:2609
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3777b8ebe9
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:00007f37789ce038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f3777db5fa0 RCX: 00007f3777b8ebe9
RDX: 0000000000000000 RSI: 0000200000000180 RDI: 0000000000000006
RBP: 00007f37789ce090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f3777db6038 R14: 00007f3777db5fa0 R15: 00007ffd643a9548
CPU: 0 PID: 10594 Comm: syz.0.2037 Not tainted 6.1.147-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
fail_dump lib/fault-inject.c:52 [inline]
should_fail_ex+0x399/0x4d0 lib/fault-inject.c:147
strncpy_from_user+0x32/0x350 lib/strncpy_from_user.c:118
strncpy_from_user_nofault+0x6d/0x140 mm/maccess.c:186
bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:204 [inline]
____bpf_probe_read_user_str kernel/trace/bpf_trace.c:213 [inline]
bpf_probe_read_user_str+0x26/0x70 kernel/trace/bpf_trace.c:210
bpf_prog_bc7c5c6b9645592f+0x35/0x37
bpf_dispatcher_nop_func include/linux/bpf.h:1001 [inline]
__bpf_prog_run include/linux/filter.h:603 [inline]
bpf_prog_run include/linux/filter.h:610 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2285 [inline]
bpf_trace_run4+0x1f5/0x420 kernel/trace/bpf_trace.c:2326
__traceiter_sched_switch+0x8f/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x1d18/0x40b0 kernel/sched/core.c:6558
preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__inline_bsearch include/linux/bsearch.h:20 [inline]
RIP: 0010:bsearch+0x67/0xb0 lib/bsearch.c:33
Code: 89 ef 48 89 ee ff 14 24 89 c3 31 ff 89 c6 e8 70 6b 7b fd 85 db 74 31 31 ff 89 de e8 63 6b 7b fd 4c 01 f5 31 c0 85 db 0f 9f c0 <4c> 0f 4f e5 49 29 c7 49 83 ff 02 72 18 49 d1 ef e8 e4 67 7b fd eb
RSP: 0018:ffffc9000d9a7560 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88805467d940 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8c76d190 R08: ffffffff8a01b9d0 R09: ffffed10060ece2e
R10: ffffed10060ece2e R11: 1ffff110060ece2d R12: ffffffff8c76a0a0
R13: ffffc9000d9a75c0 R14: 000000000000000c R15: 0000000000000826
search_extable+0x8c/0xd0 lib/extable.c:116
search_kernel_exception_table kernel/extable.c:49 [inline]
search_exception_tables+0x36/0x60 kernel/extable.c:58
fixup_exception+0xaa/0x1c40 arch/x86/mm/extable.c:225
kernelmode_fixup_or_oops+0x6c/0xd0 arch/x86/mm/fault.c:740
__bad_area_nosemaphore+0x118/0x740 arch/x86/mm/fault.c:797
handle_page_fault arch/x86/mm/fault.c:1431 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1487
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0010:copy_user_short_string+0x22/0x40 arch/x86/lib/copy_user_64.S:242
Code: e7 90 90 90 90 90 90 90 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 4c 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 <8a> 06 88 07 48 ff c6 48 ff c7 ff c9 75 f2 31 c0 0f 01 ca c3 8d 14
RSP: 0018:ffffc9000d9a7a08 EFLAGS: 00050202
RAX: ffffffff84067401 RBX: 0000000000000007 RCX: 0000000000000007
RDX: 0000000000000007 RSI: 0000000000000000 RDI: ffffc9000d9a7ac0
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff52001b34f59
R10: fffff52001b34f59 R11: 1ffff92001b34f58 R12: 00007fffffffeff9
R13: 0000000000000000 R14: ffffc9000d9a7ac0 R15: 0000000000000000
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
_copy_from_user+0xf4/0x170 lib/usercopy.c:23
copy_from_user include/linux/uaccess.h:161 [inline]
____sys_sendmsg+0x2d5/0x970 net/socket.c:2496
___sys_sendmsg+0x21c/0x290 net/socket.c:2573
__sys_sendmsg net/socket.c:2602 [inline]
__do_sys_sendmsg net/socket.c:2611 [inline]
__se_sys_sendmsg+0x19e/0x270 net/socket.c:2609
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3777b8ebe9
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:00007f37789ce038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f3777db5fa0 RCX: 00007f3777b8ebe9
RDX: 0000000000000000 RSI: 0000200000000180 RDI: 0000000000000006
RBP: 00007f37789ce090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f3777db6038 R14: 00007f3777db5fa0 R15: 00007ffd643a9548
----------------
Code disassembly (best guess):
0: 89 ef mov %ebp,%edi
2: 48 89 ee mov %rbp,%rsi
5: ff 14 24 call *(%rsp)
8: 89 c3 mov %eax,%ebx
a: 31 ff xor %edi,%edi
c: 89 c6 mov %eax,%esi
e: e8 70 6b 7b fd call 0xfd7b6b83
13: 85 db test %ebx,%ebx
15: 74 31 je 0x48
17: 31 ff xor %edi,%edi
19: 89 de mov %ebx,%esi
1b: e8 63 6b 7b fd call 0xfd7b6b83
20: 4c 01 f5 add %r14,%rbp
23: 31 c0 xor %eax,%eax
25: 85 db test %ebx,%ebx
27: 0f 9f c0 setg %al
* 2a: 4c 0f 4f e5 cmovg %rbp,%r12 <-- trapping instruction
2e: 49 29 c7 sub %rax,%r15
31: 49 83 ff 02 cmp $0x2,%r15
35: 72 18 jb 0x4f
37: 49 d1 ef shr %r15
3a: e8 e4 67 7b fd call 0xfd7b6823
3f: eb .byte 0xeb