------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.7.0-rc4-next-20231207-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.3/24473 is trying to acquire lock:
ffffffff8d199458 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0x12/0x70 kernel/locking/semaphore.c:139
but task is already holding lock:
ffffffff8dc75078 (pool_rwlock){----}-{2:2}, at: stack_depot_put lib/stackdepot.c:621 [inline]
ffffffff8dc75078 (pool_rwlock){----}-{2:2}, at: stack_depot_put+0x24/0x110 lib/stackdepot.c:613
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (pool_rwlock){----}-{2:2}:
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0x46/0x90 kernel/locking/spinlock.c:236
stack_depot_save_flags+0x169/0x740 lib/stackdepot.c:508
kasan_save_stack+0x42/0x50 mm/kasan/common.c:48
__kasan_record_aux_stack+0xc2/0xd0 mm/kasan/generic.c:517
task_work_add+0x88/0x2a0 kernel/task_work.c:48
task_tick_numa kernel/sched/fair.c:3512 [inline]
task_tick_fair+0x5a5/0xc30 kernel/sched/fair.c:12599
scheduler_tick+0x210/0x650 kernel/sched/core.c:5674
update_process_times+0x19e/0x220 kernel/time/timer.c:2076
tick_sched_handle+0x8e/0x170 kernel/time/tick-sched.c:255
tick_nohz_highres_handler+0xe9/0x110 kernel/time/tick-sched.c:1516
__run_hrtimer kernel/time/hrtimer.c:1688 [inline]
__hrtimer_run_queues+0x654/0xc20 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
__sysvec_apic_timer_interrupt+0x10c/0x410 arch/x86/kernel/apic/apic.c:1082
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
lock_acquire+0x1f2/0x530 kernel/locking/lockdep.c:5722
down_write+0x3a/0x50 kernel/locking/rwsem.c:1579
vma_start_write include/linux/mm.h:716 [inline]
__split_vma+0x923/0x1190 mm/mmap.c:2360
do_vmi_align_munmap+0x2c2/0x1ad0 mm/mmap.c:2531
do_vmi_munmap+0x20b/0x440 mm/mmap.c:2690
__vm_munmap+0x145/0x390 mm/mmap.c:2977
elf_map fs/binfmt_elf.c:383 [inline]
elf_load+0x4ce/0x870 fs/binfmt_elf.c:408
load_elf_binary+0xc5d/0x4e10 fs/binfmt_elf.c:1132
search_binary_handler fs/exec.c:1736 [inline]
exec_binprm fs/exec.c:1778 [inline]
bprm_execve fs/exec.c:1853 [inline]
bprm_execve+0x7ef/0x1a80 fs/exec.c:1809
kernel_execve+0x3d7/0x4e0 fs/exec.c:2034
try_to_run_init_process init/main.c:1364 [inline]
kernel_init+0x137/0x2a0 init/main.c:1497
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
-> #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:558
raw_spin_rq_lock kernel/sched/sched.h:1385 [inline]
rq_lock kernel/sched/sched.h:1699 [inline]
task_fork_fair+0x70/0x240 kernel/sched/fair.c:12619
sched_cgroup_fork+0x3cf/0x510 kernel/sched/core.c:4835
copy_process+0x6a38/0x9770 kernel/fork.c:2601
kernel_clone+0xfd/0x940 kernel/fork.c:2899
user_mode_thread+0xb4/0xf0 kernel/fork.c:2977
rest_init+0x27/0x2b0 init/main.c:695
arch_call_rest_init+0x13/0x30 init/main.c:827
start_kernel+0x39e/0x480 init/main.c:1072
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:555
x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:536
secondary_startup_64_no_verify+0x166/0x16b
-> #1 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:522 [inline]
try_to_wake_up+0x9a/0x13d0 kernel/sched/core.c:4252
up+0x79/0xb0 kernel/locking/semaphore.c:191
__up_console_sem kernel/printk/printk.c:340 [inline]
__console_unlock kernel/printk/printk.c:2706 [inline]
console_unlock+0x1cf/0x260 kernel/printk/printk.c:3038
vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2303
vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2328
kauditd_printk_skb kernel/audit.c:546 [inline]
kauditd_hold_skb+0x1fb/0x240 kernel/audit.c:581
kauditd_send_queue+0x229/0x280 kernel/audit.c:766
kauditd_thread+0x61e/0xa80 kernel/audit.c:890
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
-> #0 ((console_sem).lock){-.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x246e/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5719
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x50 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+0x73/0x130 kernel/printk/printk.c:2659
console_trylock_spinning kernel/printk/printk.c:1923 [inline]
vprintk_emit+0x162/0x5f0 kernel/printk/printk.c:2302
vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2328
__warn_printk+0x158/0x350 kernel/panic.c:721
refcount_warn_saturate+0x149/0x210 lib/refcount.c:28
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
stack_depot_put lib/stackdepot.c:627 [inline]
stack_depot_put+0xe4/0x110 lib/stackdepot.c:613
__kasan_record_aux_stack+0xb3/0xd0 mm/kasan/generic.c:515
insert_work+0x38/0x230 kernel/workqueue.c:1653
__queue_work+0x633/0x11d0 kernel/workqueue.c:1802
__queue_delayed_work+0x1bf/0x270 kernel/workqueue.c:1953
mod_delayed_work_on+0xcc/0x1a0 kernel/workqueue.c:2027
kblockd_mod_delayed_work_on+0x29/0x40 block/blk-core.c:1046
blk_flush_complete_seq+0x3ad/0x10c0 block/blk-flush.c:194
flush_end_io+0x6f8/0xc80 block/blk-flush.c:264
__blk_mq_end_request+0x248/0x4f0 block/blk-mq.c:1046
scsi_end_request+0x444/0x9a0 drivers/scsi/scsi_lib.c:572
scsi_io_completion+0x251/0x14c0 drivers/scsi/scsi_lib.c:975
scsi_complete+0x124/0x250 drivers/scsi/scsi_lib.c:1437
blk_complete_reqs+0xb2/0xf0 block/blk-mq.c:1131
__do_softirq+0x216/0x8d5 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb5/0x120 kernel/softirq.c:644
common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:247
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636
get_current arch/x86/include/asm/current.h:47 [inline]
finish_task_switch.isra.0+0x220/0xcb0 kernel/sched/core.c:5273
context_switch kernel/sched/core.c:5402 [inline]
__schedule+0xf1d/0x5c80 kernel/sched/core.c:6726
__schedule_loop kernel/sched/core.c:6801 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6816
io_schedule+0xbb/0x130 kernel/sched/core.c:9022
folio_wait_bit_common+0x3da/0x9c0 mm/filemap.c:1273
folio_wait_writeback+0x3d/0x260 mm/page-writeback.c:3061
__filemap_fdatawait_range+0x117/0x220 mm/filemap.c:522
file_write_and_wait_range+0x103/0x140 mm/filemap.c:782
ext4_sync_file+0x296/0xed0 fs/ext4/fsync.c:158
vfs_fsync_range+0x141/0x220 fs/sync.c:188
generic_write_sync include/linux/fs.h:2732 [inline]
ext4_buffered_write_iter+0x2e6/0x3c0 fs/ext4/file.c:305
ext4_file_write_iter+0x819/0x1950 fs/ext4/file.c:698
__kernel_write_iter+0x260/0x7b0 fs/read_write.c:517
dump_emit_page fs/coredump.c:888 [inline]
dump_user_range+0x299/0x790 fs/coredump.c:915
elf_core_dump+0x2704/0x3900 fs/binfmt_elf.c:2077
do_coredump+0x2c7d/0x3fb0 fs/coredump.c:764
get_signal+0x240e/0x2770 kernel/signal.c:2879
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11e/0x240 kernel/entry/common.c:204
irqentry_exit_to_user_mode+0xa/0x40 kernel/entry/common.c:309
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
other info that might help us debug this:
Chain exists of:
(console_sem).lock --> &rq->__lock --> pool_rwlock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(pool_rwlock);
lock(&rq->__lock);
lock(pool_rwlock);
lock((console_sem).lock);
*** DEADLOCK ***
5 locks held by syz-executor.3/24473:
#0: ffff888026f80420 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x240e/0x2770 kernel/signal.c:2879
#1: ffff88801f2df218 (&fq->mq_flush_lock){..-.}-{2:2}, at: flush_end_io+0xcb/0xc80 block/blk-flush.c:226
#2: ffffffff8d1ab9a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#2: ffffffff8d1ab9a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:744 [inline]
#2: ffffffff8d1ab9a0 (rcu_read_lock){....}-{1:2}, at: __queue_work+0xf2/0x11d0 kernel/workqueue.c:1730
#3: ffff8880b993c2f8 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x39e/0x11d0 kernel/workqueue.c:1766
#4: ffffffff8dc75078 (pool_rwlock){----}-{2:2}, at: stack_depot_put lib/stackdepot.c:621 [inline]
#4: ffffffff8dc75078 (pool_rwlock){----}-{2:2}, at: stack_depot_put+0x24/0x110 lib/stackdepot.c:613
stack backtrace:
CPU: 1 PID: 24473 Comm: syz-executor.3 Not tainted 6.7.0-rc4-next-20231207-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
check_noncircular+0x316/0x400 kernel/locking/lockdep.c:2187
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x246e/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5719
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x50 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+0x73/0x130 kernel/printk/printk.c:2659
console_trylock_spinning kernel/printk/printk.c:1923 [inline]
vprintk_emit+0x162/0x5f0 kernel/printk/printk.c:2302
vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2328
__warn_printk+0x158/0x350 kernel/panic.c:721
refcount_warn_saturate+0x149/0x210 lib/refcount.c:28
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
stack_depot_put lib/stackdepot.c:627 [inline]
stack_depot_put+0xe4/0x110 lib/stackdepot.c:613
__kasan_record_aux_stack+0xb3/0xd0 mm/kasan/generic.c:515
insert_work+0x38/0x230 kernel/workqueue.c:1653
__queue_work+0x633/0x11d0 kernel/workqueue.c:1802
__queue_delayed_work+0x1bf/0x270 kernel/workqueue.c:1953
mod_delayed_work_on+0xcc/0x1a0 kernel/workqueue.c:2027
kblockd_mod_delayed_work_on+0x29/0x40 block/blk-core.c:1046
blk_flush_complete_seq+0x3ad/0x10c0 block/blk-flush.c:194
flush_end_io+0x6f8/0xc80 block/blk-flush.c:264
__blk_mq_end_request+0x248/0x4f0 block/blk-mq.c:1046
scsi_end_request+0x444/0x9a0 drivers/scsi/scsi_lib.c:572
scsi_io_completion+0x251/0x14c0 drivers/scsi/scsi_lib.c:975
scsi_complete+0x124/0x250 drivers/scsi/scsi_lib.c:1437
blk_complete_reqs+0xb2/0xf0 block/blk-mq.c:1131
__do_softirq+0x216/0x8d5 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb5/0x120 kernel/softirq.c:644
common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:247
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636
RIP: 0010:finish_task_switch.isra.0+0x220/0xcb0 kernel/sched/core.c:5273
Code: 90 0a 00 00 44 8b 0d 27 3c de 0d 45 85 c9 0f 85 bc 01 00 00 48 89 df e8 ce f8 ff ff e8 a9 7d 33 00 fb 65 48 8b 1d 70 6d a8 7e <48> 8d bb d8 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc9000e6a6c90 EFLAGS: 00000206
RAX: 0000000000088641 RBX: ffff88801e1fbb80 RCX: 1ffffffff242d591
RDX: 0000000000000000 RSI: ffffffff8accbc20 RDI: ffffffff8b2f2b40
RBP: ffffc9000e6a6cd8 R08: 0000000000000001 R09: fffffbfff24257fc
R10: ffffffff9212bfe7 R11: 0000000000000001 R12: ffff8880b993d478
R13: ffff888026ead940 R14: ffff88801306a600 R15: ffff8880b983c700
context_switch kernel/sched/core.c:5402 [inline]
__schedule+0xf1d/0x5c80 kernel/sched/core.c:6726
__schedule_loop kernel/sched/core.c:6801 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6816
io_schedule+0xbb/0x130 kernel/sched/core.c:9022
folio_wait_bit_common+0x3da/0x9c0 mm/filemap.c:1273
folio_wait_writeback+0x3d/0x260 mm/page-writeback.c:3061
__filemap_fdatawait_range+0x117/0x220 mm/filemap.c:522
file_write_and_wait_range+0x103/0x140 mm/filemap.c:782
ext4_sync_file+0x296/0xed0 fs/ext4/fsync.c:158
vfs_fsync_range+0x141/0x220 fs/sync.c:188
generic_write_sync include/linux/fs.h:2732 [inline]
ext4_buffered_write_iter+0x2e6/0x3c0 fs/ext4/file.c:305
ext4_file_write_iter+0x819/0x1950 fs/ext4/file.c:698
__kernel_write_iter+0x260/0x7b0 fs/read_write.c:517
dump_emit_page fs/coredump.c:888 [inline]
dump_user_range+0x299/0x790 fs/coredump.c:915
elf_core_dump+0x2704/0x3900 fs/binfmt_elf.c:2077
do_coredump+0x2c7d/0x3fb0 fs/coredump.c:764
get_signal+0x240e/0x2770 kernel/signal.c:2879
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11e/0x240 kernel/entry/common.c:204
irqentry_exit_to_user_mode+0xa/0x40 kernel/entry/common.c:309
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 002b:0000000020000048 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f32fc39bf80 RCX: 00007f32fc27cba9
RDX: 0000000020000080 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f32fc2c847a R08: 0000000000000000 R09: 0000000000000000
R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f32fc39bf80 R15: 00007fff7c288248
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 24473 at lib/refcount.c:28 refcount_warn_saturate+0x14a/0x210 lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 24473 Comm: syz-executor.3 Not tainted 6.7.0-rc4-next-20231207-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:refcount_warn_saturate+0x14a/0x210 lib/refcount.c:28
Code: ff 89 de e8 58 b6 22 fd 84 db 0f 85 66 ff ff ff e8 1b bb 22 fd c6 05 32 25 be 0a 01 90 48 c7 c7 00 ce 2e 8b e8 67 ac e8 fc 90 <0f> 0b 90 90 e9 43 ff ff ff e8 f8 ba 22 fd 0f b6 1d 0d 25 be 0a 31
RSP: 0018:ffffc900001f0a98 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff814e05d9
RDX: ffff88801e1fbb80 RSI: ffffffff814e05e6 RDI: 0000000000000001
RBP: ffff8880264b7dbc R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000034420 R12: ffff888142aa7780
R13: ffff888018a92400 R14: ffff888018a9245c R15: ffff8880b993c340
FS: 00007f32fcf2c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd20cec56be CR3: 000000003e798000 CR4: 00000000003506f0
DR0: 000000000000d8dd DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
stack_depot_put lib/stackdepot.c:627 [inline]
stack_depot_put+0xe4/0x110 lib/stackdepot.c:613
__kasan_record_aux_stack+0xb3/0xd0 mm/kasan/generic.c:515
insert_work+0x38/0x230 kernel/workqueue.c:1653
__queue_work+0x633/0x11d0 kernel/workqueue.c:1802
__queue_delayed_work+0x1bf/0x270 kernel/workqueue.c:1953
mod_delayed_work_on+0xcc/0x1a0 kernel/workqueue.c:2027
kblockd_mod_delayed_work_on+0x29/0x40 block/blk-core.c:1046
blk_flush_complete_seq+0x3ad/0x10c0 block/blk-flush.c:194
flush_end_io+0x6f8/0xc80 block/blk-flush.c:264
__blk_mq_end_request+0x248/0x4f0 block/blk-mq.c:1046
scsi_end_request+0x444/0x9a0 drivers/scsi/scsi_lib.c:572
scsi_io_completion+0x251/0x14c0 drivers/scsi/scsi_lib.c:975
scsi_complete+0x124/0x250 drivers/scsi/scsi_lib.c:1437
blk_complete_reqs+0xb2/0xf0 block/blk-mq.c:1131
__do_softirq+0x216/0x8d5 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb5/0x120 kernel/softirq.c:644
common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:247
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636
RIP: 0010:finish_task_switch.isra.0+0x220/0xcb0 kernel/sched/core.c:5273
Code: 90 0a 00 00 44 8b 0d 27 3c de 0d 45 85 c9 0f 85 bc 01 00 00 48 89 df e8 ce f8 ff ff e8 a9 7d 33 00 fb 65 48 8b 1d 70 6d a8 7e <48> 8d bb d8 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc9000e6a6c90 EFLAGS: 00000206
RAX: 0000000000088641 RBX: ffff88801e1fbb80 RCX: 1ffffffff242d591
RDX: 0000000000000000 RSI: ffffffff8accbc20 RDI: ffffffff8b2f2b40
RBP: ffffc9000e6a6cd8 R08: 0000000000000001 R09: fffffbfff24257fc
R10: ffffffff9212bfe7 R11: 0000000000000001 R12: ffff8880b993d478
R13: ffff888026ead940 R14: ffff88801306a600 R15: ffff8880b983c700
context_switch kernel/sched/core.c:5402 [inline]
__schedule+0xf1d/0x5c80 kernel/sched/core.c:6726
__schedule_loop kernel/sched/core.c:6801 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6816
io_schedule+0xbb/0x130 kernel/sched/core.c:9022
folio_wait_bit_common+0x3da/0x9c0 mm/filemap.c:1273
folio_wait_writeback+0x3d/0x260 mm/page-writeback.c:3061
__filemap_fdatawait_range+0x117/0x220 mm/filemap.c:522
file_write_and_wait_range+0x103/0x140 mm/filemap.c:782
ext4_sync_file+0x296/0xed0 fs/ext4/fsync.c:158
vfs_fsync_range+0x141/0x220 fs/sync.c:188
generic_write_sync include/linux/fs.h:2732 [inline]
ext4_buffered_write_iter+0x2e6/0x3c0 fs/ext4/file.c:305
ext4_file_write_iter+0x819/0x1950 fs/ext4/file.c:698
__kernel_write_iter+0x260/0x7b0 fs/read_write.c:517
dump_emit_page fs/coredump.c:888 [inline]
dump_user_range+0x299/0x790 fs/coredump.c:915
elf_core_dump+0x2704/0x3900 fs/binfmt_elf.c:2077
do_coredump+0x2c7d/0x3fb0 fs/coredump.c:764
get_signal+0x240e/0x2770 kernel/signal.c:2879
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11e/0x240 kernel/entry/common.c:204
irqentry_exit_to_user_mode+0xa/0x40 kernel/entry/common.c:309
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 002b:0000000020000048 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f32fc39bf80 RCX: 00007f32fc27cba9
RDX: 0000000020000080 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f32fc2c847a R08: 0000000000000000 R09: 0000000000000000
R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f32fc39bf80 R15: 00007fff7c288248
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 00 00 add %al,(%rax)
2: 44 8b 0d 27 3c de 0d mov 0xdde3c27(%rip),%r9d # 0xdde3c30
9: 45 85 c9 test %r9d,%r9d
c: 0f 85 bc 01 00 00 jne 0x1ce
12: 48 89 df mov %rbx,%rdi
15: e8 ce f8 ff ff call 0xfffff8e8
1a: e8 a9 7d 33 00 call 0x337dc8
1f: fb sti
20: 65 48 8b 1d 70 6d a8 mov %gs:0x7ea86d70(%rip),%rbx # 0x7ea86d98
27: 7e
* 28: 48 8d bb d8 15 00 00 lea 0x15d8(%rbx),%rdi <-- trapping instruction
2f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
36: fc ff df
39: 48 89 fa mov %rdi,%rdx
3c: 48 rex.W
3d: c1 .byte 0xc1