------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.2.48/6088 is trying to acquire lock:
ffffffff8e6f1560 (console_owner){-...}-{0:0}, at: console_lock_spinning_enable+0x61/0x80 kernel/printk/printk.c:1902
but task is already holding lock:
ffff8880b843b420 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:660 [inline]
ffff8880b843b420 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x88/0x140 kernel/sched/core.c:644
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:382
raw_spin_rq_lock_nested+0x2c/0x140 kernel/sched/core.c:652
raw_spin_rq_lock kernel/sched/sched.h:1624 [inline]
_task_rq_lock+0xcf/0x510 kernel/sched/core.c:747
cgroup_move_task+0x81/0x320 kernel/sched/psi.c:1170
css_set_move_task+0x285/0x600 kernel/cgroup/cgroup.c:899
cgroup_post_fork+0x202/0x9b0 kernel/cgroup/cgroup.c:6944
copy_process+0x5b9a/0x7ed0 kernel/fork.c:2524
kernel_clone+0x176/0x9e0 kernel/fork.c:2722
user_mode_thread+0xcc/0x110 kernel/fork.c:2798
rest_init+0x21/0x260 init/main.c:727
start_kernel+0x484/0x490 init/main.c:1220
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148
-> #3 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:166
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:571 [inline]
try_to_wake_up+0xb5/0x1900 kernel/sched/core.c:4190
__wake_up_common+0x135/0x1f0 kernel/sched/wait.c:108
__wake_up_common_lock kernel/sched/wait.c:125 [inline]
__wake_up+0x31/0x60 kernel/sched/wait.c:146
tty_port_default_wakeup+0x52/0x70 drivers/tty/tty_port.c:67
serial8250_tx_chars+0x68f/0x860 drivers/tty/serial/8250/8250_port.c:1721
serial8250_handle_irq_locked+0x5e6/0x7e0 drivers/tty/serial/8250/8250_port.c:1825
serial8250_handle_irq.part.0+0xb4/0x530 drivers/tty/serial/8250/8250_port.c:1841
serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1837 [inline]
serial8250_default_handle_irq+0xc2/0x290 drivers/tty/serial/8250/8250_port.c:1855
serial8250_interrupt+0xf8/0x1c0 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x235/0x8c0 kernel/irq/handle.c:209
handle_irq_event_percpu kernel/irq/handle.c:246 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:263
handle_edge_irq+0x35e/0x960 kernel/irq/chip.c:857
generic_handle_irq_desc include/linux/irqdesc.h:186 [inline]
handle_irq arch/x86/kernel/irq.c:262 [inline]
call_irq_handler arch/x86/kernel/irq.c:318 [inline]
__common_interrupt+0xd8/0x2f0 arch/x86/kernel/irq.c:333
common_interrupt+0xb9/0xe0 arch/x86/kernel/irq.c:326
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
mas_find+0xf/0x740 lib/maple_tree.c:5382
vma_next include/linux/mm.h:1596 [inline]
acct_collect+0x5be/0x860 kernel/acct.c:569
do_exit+0x1aed/0x2af0 kernel/exit.c:940
do_group_exit+0xd5/0x2a0 kernel/exit.c:1119
__do_sys_exit_group kernel/exit.c:1130 [inline]
__se_sys_exit_group kernel/exit.c:1128 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1128
x64_sys_call+0x102c/0x1530 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #2 (&tty->write_wait){-.-.}-{3:3}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:166
__wake_up_common_lock kernel/sched/wait.c:124 [inline]
__wake_up+0x1c/0x60 kernel/sched/wait.c:146
tty_port_default_wakeup+0x52/0x70 drivers/tty/tty_port.c:67
serial8250_tx_chars+0x68f/0x860 drivers/tty/serial/8250/8250_port.c:1721
serial8250_handle_irq_locked+0x5e6/0x7e0 drivers/tty/serial/8250/8250_port.c:1825
serial8250_handle_irq.part.0+0xb4/0x530 drivers/tty/serial/8250/8250_port.c:1841
serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1837 [inline]
serial8250_default_handle_irq+0xc2/0x290 drivers/tty/serial/8250/8250_port.c:1855
serial8250_interrupt+0xf8/0x1c0 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x235/0x8c0 kernel/irq/handle.c:209
handle_irq_event_percpu kernel/irq/handle.c:246 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:263
handle_edge_irq+0x35e/0x960 kernel/irq/chip.c:857
generic_handle_irq_desc include/linux/irqdesc.h:186 [inline]
handle_irq arch/x86/kernel/irq.c:262 [inline]
call_irq_handler arch/x86/kernel/irq.c:318 [inline]
__common_interrupt+0xd8/0x2f0 arch/x86/kernel/irq.c:333
common_interrupt+0xb9/0xe0 arch/x86/kernel/irq.c:326
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:62
arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline]
default_idle+0x9/0x10 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x464/0x590 kernel/sched/idle.c:352
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:451
rest_init+0x251/0x260 init/main.c:762
start_kernel+0x484/0x490 init/main.c:1220
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148
-> #1 (&port_lock_key){-.-.}-{3:3}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:166
uart_port_lock_irqsave include/linux/serial_core.h:717 [inline]
serial8250_console_write+0x17e/0x1900 drivers/tty/serial/8250/8250_port.c:3316
console_emit_next_record kernel/printk/printk.c:3183 [inline]
console_flush_one_record+0x790/0xe50 kernel/printk/printk.c:3269
console_flush_all kernel/printk/printk.c:3343 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
console_unlock+0x103/0x260 kernel/printk/printk.c:3413
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
_printk+0xcf/0x110 kernel/printk/printk.c:2504
register_console.cold+0xc0/0x248 kernel/printk/printk.c:4208
univ8250_console_init+0x6f/0x80 drivers/tty/serial/8250/8250_core.c:515
console_init+0x3f7/0x5e0 kernel/printk/printk.c:4407
start_kernel+0x30a/0x490 init/main.c:1157
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148
-> #0 (console_owner){-...}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x14b8/0x2630 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x1b1/0x370 kernel/locking/lockdep.c:5825
console_lock_spinning_enable+0x72/0x80 kernel/printk/printk.c:1902
console_emit_next_record kernel/printk/printk.c:3177 [inline]
console_flush_one_record+0x739/0xe50 kernel/printk/printk.c:3269
console_flush_all kernel/printk/printk.c:3343 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
console_unlock+0x103/0x260 kernel/printk/printk.c:3413
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
_printk+0xcf/0x110 kernel/printk/printk.c:2504
__report_bug.cold+0x15/0x137 lib/bug.c:240
report_bug+0xb2/0x220 lib/bug.c:278
handle_bug+0x16a/0x2a0 arch/x86/kernel/traps.c:436
exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:490
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:616
lockdep_assert_rq_held kernel/sched/sched.h:1612 [inline]
lockdep_assert_rq_held kernel/sched/sched.h:1609 [inline]
update_rq_clock+0x40a/0xd20 kernel/sched/core.c:850
pick_next_task kernel/sched/core.c:6222 [inline]
__schedule+0x1e84/0x67a0 kernel/sched/core.c:7105
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x205/0x970 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
in_softirq_really kernel/kcov.c:171 [inline]
check_kcov_mode kernel/kcov.c:183 [inline]
write_comp_data+0x2b/0x90 kernel/kcov.c:246
const_folio_flags include/linux/page-flags.h:345 [inline]
folio_test_head include/linux/page-flags.h:843 [inline]
folio_test_large include/linux/page-flags.h:864 [inline]
folio_order include/linux/mm.h:1724 [inline]
shmem_add_to_page_cache+0x3ee/0xcd0 mm/shmem.c:885
shmem_alloc_and_add_folio+0x558/0xd40 mm/shmem.c:2001
shmem_get_folio_gfp+0x6ab/0x1900 mm/shmem.c:2564
shmem_get_folio mm/shmem.c:2670 [inline]
shmem_write_begin+0x1a4/0x420 mm/shmem.c:3303
generic_perform_write+0x292/0xa40 mm/filemap.c:4325
shmem_file_write_iter+0x10e/0x140 mm/shmem.c:3478
__kernel_write_iter+0x2ac/0x920 fs/read_write.c:621
dump_emit_page fs/coredump.c:1304 [inline]
dump_user_range+0x3f9/0xad0 fs/coredump.c:1378
elf_core_dump+0x2d5f/0x3d10 fs/binfmt_elf.c:2109
coredump_write fs/coredump.c:1053 [inline]
do_coredump fs/coredump.c:1132 [inline]
vfs_coredump+0x2980/0x5770 fs/coredump.c:1206
get_signal+0x2162/0x2210 kernel/signal.c:3022
arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop kernel/entry/common.c:98 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline]
irqentry_exit+0x39e/0x970 kernel/entry/common.c:162
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
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 ***
5 locks held by syz.2.48/6088:
#0: ffff88807ac02410 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x2162/0x2210 kernel/signal.c:3022
#1: ffff888029f56e80 (&sb->s_type->i_mutex_key#15){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#1: ffff888029f56e80 (&sb->s_type->i_mutex_key#15){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3468
#2: ffff8880b843b420 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:660 [inline]
#2: ffff8880b843b420 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x88/0x140 kernel/sched/core.c:644
#3: ffffffff8e7d19a0 (console_lock){+.+.}-{0:0}, at: _printk+0xcf/0x110 kernel/printk/printk.c:2504
#4: ffffffff8e7d1a18 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:305 [inline]
#4: ffffffff8e7d1a18 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:428 [inline]
#4: ffffffff8e7d1a18 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:291 [inline]
#4: ffffffff8e7d1a18 (console_srcu){....}-{0:0}, at: console_flush_one_record+0xfd/0xe50 kernel/printk/printk.c:3246
stack backtrace:
CPU: 0 UID: 0 PID: 6088 Comm: syz.2.48 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043
check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x14b8/0x2630 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x1b1/0x370 kernel/locking/lockdep.c:5825
console_lock_spinning_enable+0x72/0x80 kernel/printk/printk.c:1902
console_emit_next_record kernel/printk/printk.c:3177 [inline]
console_flush_one_record+0x739/0xe50 kernel/printk/printk.c:3269
console_flush_all kernel/printk/printk.c:3343 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
console_unlock+0x103/0x260 kernel/printk/printk.c:3413
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
_printk+0xcf/0x110 kernel/printk/printk.c:2504
__report_bug.cold+0x15/0x137 lib/bug.c:240
report_bug+0xb2/0x220 lib/bug.c:278
handle_bug+0x16a/0x2a0 arch/x86/kernel/traps.c:436
exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:490
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:616
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1612 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1609 [inline]
RIP: 0010:update_rq_clock+0x40a/0xd20 kernel/sched/core.c:850
Code: ab 88 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc a8 04 0f 84 df fc ff ff 90 0f 0b 90 e9 d6 fc ff ff 90 <0f> 0b 90 e9 92 fc ff ff 4c 8d 83 80 0b 00 00 48 b8 00 00 00 00 00
RSP: 0018:ffffc90005d0e7c8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b853b3c0 RCX: 0000000000000001
RDX: 0000000000000046 RSI: ffffffff8dee1fb0 RDI: ffffffff8c1c4380
RBP: ffffc90005d0e978 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90d70157 R11: 0000000000000000 R12: ffffffff90d734c4
R13: ffff8880b853c260 R14: ffff88801e681f00 R15: ffff8880b853b3c0
pick_next_task kernel/sched/core.c:6222 [inline]
__schedule+0x1e84/0x67a0 kernel/sched/core.c:7105
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x205/0x970 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:write_comp_data+0x2b/0x90 kernel/kcov.c:272
Code: 8b 05 39 aa 00 12 49 89 f8 49 89 f1 49 89 d2 65 48 8b 3d 10 aa 00 12 a9 00 01 ff 00 74 1b f6 c4 01 74 07 a9 00 00 ff 00 74 05 c0 06 80 09 8b 87 ec 16 00 00 85 c0 74 f1 8b 87 c8 16 00 00 83
RSP: 0018:ffffc90005d0ea98 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffea00023e2a40 RCX: ffffffff824f635e
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88802034dd00
RBP: ffffea00023e2a48 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000068dd
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
const_folio_flags include/linux/page-flags.h:345 [inline]
folio_test_head include/linux/page-flags.h:843 [inline]
folio_test_large include/linux/page-flags.h:864 [inline]
folio_order include/linux/mm.h:1724 [inline]
shmem_add_to_page_cache+0x3ee/0xcd0 mm/shmem.c:885
shmem_alloc_and_add_folio+0x558/0xd40 mm/shmem.c:2001
shmem_get_folio_gfp+0x6ab/0x1900 mm/shmem.c:2564
shmem_get_folio mm/shmem.c:2670 [inline]
shmem_write_begin+0x1a4/0x420 mm/shmem.c:3303
generic_perform_write+0x292/0xa40 mm/filemap.c:4325
shmem_file_write_iter+0x10e/0x140 mm/shmem.c:3478
__kernel_write_iter+0x2ac/0x920 fs/read_write.c:621
dump_emit_page fs/coredump.c:1304 [inline]
dump_user_range+0x3f9/0xad0 fs/coredump.c:1378
elf_core_dump+0x2d5f/0x3d10 fs/binfmt_elf.c:2109
coredump_write fs/coredump.c:1053 [inline]
do_coredump fs/coredump.c:1132 [inline]
vfs_coredump+0x2980/0x5770 fs/coredump.c:1206
get_signal+0x2162/0x2210 kernel/signal.c:3022
arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop kernel/entry/common.c:98 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline]
irqentry_exit+0x39e/0x970 kernel/entry/common.c:162
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x11000
Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 002b:0000000000000011 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00007fd562416270 RCX: 00007fd56219ce59
RDX: 9999999999999999 RSI: 0000000000000009 RDI: 0000000100000008
RBP: 00007fd562232d6f R08: 0000000004000006 R09: 0000000000000000
R10: ffffffff81000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd562416308 R14: 00007fd562416270 R15: 00007ffd48c25838
debug_locks && !(lock_is_held(&(__rq_lockp(rq))->dep_map) != 0)
WARNING: kernel/sched/sched.h:1612 at lockdep_assert_rq_held kernel/sched/sched.h:1612 [inline], CPU#0: syz.2.48/6088
WARNING: kernel/sched/sched.h:1612 at lockdep_assert_rq_held kernel/sched/sched.h:1609 [inline], CPU#0: syz.2.48/6088
WARNING: kernel/sched/sched.h:1612 at update_rq_clock+0x40a/0xd20 kernel/sched/core.c:850, CPU#0: syz.2.48/6088
Modules linked in:
CPU: 0 UID: 0 PID: 6088 Comm: syz.2.48 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1612 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1609 [inline]
RIP: 0010:update_rq_clock+0x40a/0xd20 kernel/sched/core.c:850
Code: ab 88 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc a8 04 0f 84 df fc ff ff 90 0f 0b 90 e9 d6 fc ff ff 90 <0f> 0b 90 e9 92 fc ff ff 4c 8d 83 80 0b 00 00 48 b8 00 00 00 00 00
RSP: 0018:ffffc90005d0e7c8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b853b3c0 RCX: 0000000000000001
RDX: 0000000000000046 RSI: ffffffff8dee1fb0 RDI: ffffffff8c1c4380
RBP: ffffc90005d0e978 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90d70157 R11: 0000000000000000 R12: ffffffff90d734c4
R13: ffff8880b853c260 R14: ffff88801e681f00 R15: ffff8880b853b3c0
FS: 00007fd562fd46c0(0000) GS:ffff888124397000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa3137ea540 CR3: 0000000033f96000 CR4: 00000000003526f0
Call Trace:
pick_next_task kernel/sched/core.c:6222 [inline]
__schedule+0x1e84/0x67a0 kernel/sched/core.c:7105
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x205/0x970 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:write_comp_data+0x2b/0x90 kernel/kcov.c:272
Code: 8b 05 39 aa 00 12 49 89 f8 49 89 f1 49 89 d2 65 48 8b 3d 10 aa 00 12 a9 00 01 ff 00 74 1b f6 c4 01 74 07 a9 00 00 ff 00 74 05 c0 06 80 09 8b 87 ec 16 00 00 85 c0 74 f1 8b 87 c8 16 00 00 83
RSP: 0018:ffffc90005d0ea98 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffea00023e2a40 RCX: ffffffff824f635e
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88802034dd00
RBP: ffffea00023e2a48 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000068dd
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
const_folio_flags include/linux/page-flags.h:345 [inline]
folio_test_head include/linux/page-flags.h:843 [inline]
folio_test_large include/linux/page-flags.h:864 [inline]
folio_order include/linux/mm.h:1724 [inline]
shmem_add_to_page_cache+0x3ee/0xcd0 mm/shmem.c:885
shmem_alloc_and_add_folio+0x558/0xd40 mm/shmem.c:2001
shmem_get_folio_gfp+0x6ab/0x1900 mm/shmem.c:2564
shmem_get_folio mm/shmem.c:2670 [inline]
shmem_write_begin+0x1a4/0x420 mm/shmem.c:3303
generic_perform_write+0x292/0xa40 mm/filemap.c:4325
shmem_file_write_iter+0x10e/0x140 mm/shmem.c:3478
__kernel_write_iter+0x2ac/0x920 fs/read_write.c:621
dump_emit_page fs/coredump.c:1304 [inline]
dump_user_range+0x3f9/0xad0 fs/coredump.c:1378
elf_core_dump+0x2d5f/0x3d10 fs/binfmt_elf.c:2109
coredump_write fs/coredump.c:1053 [inline]
do_coredump fs/coredump.c:1132 [inline]
vfs_coredump+0x2980/0x5770 fs/coredump.c:1206
get_signal+0x2162/0x2210 kernel/signal.c:3022
arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop kernel/entry/common.c:98 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline]
irqentry_exit+0x39e/0x970 kernel/entry/common.c:162
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x11000
Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 002b:0000000000000011 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00007fd562416270 RCX: 00007fd56219ce59
RDX: 9999999999999999 RSI: 0000000000000009 RDI: 0000000100000008
RBP: 00007fd562232d6f R08: 0000000004000006 R09: 0000000000000000
R10: ffffffff81000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd562416308 R14: 00007fd562416270 R15: 00007ffd48c25838
----------------
Code disassembly (best guess):
0: 8b 05 39 aa 00 12 mov 0x1200aa39(%rip),%eax # 0x1200aa3f
6: 49 89 f8 mov %rdi,%r8
9: 49 89 f1 mov %rsi,%r9
c: 49 89 d2 mov %rdx,%r10
f: 65 48 8b 3d 10 aa 00 mov %gs:0x1200aa10(%rip),%rdi # 0x1200aa27
16: 12
17: a9 00 01 ff 00 test $0xff0100,%eax
1c: 74 1b je 0x39
1e: f6 c4 01 test $0x1,%ah
21: 74 07 je 0x2a
23: a9 00 00 ff 00 test $0xff0000,%eax
28: 74 05 je 0x2f
* 2a: e9 c0 06 80 09 jmp 0x98006ef <-- trapping instruction
2f: 8b 87 ec 16 00 00 mov 0x16ec(%rdi),%eax
35: 85 c0 test %eax,%eax
37: 74 f1 je 0x2a
39: 8b 87 c8 16 00 00 mov 0x16c8(%rdi),%eax
3f: 83 .byte 0x83