------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.0.1835/12329 is trying to acquire lock:
ffffffff8d1260a0 (console_owner){-...}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:339 [inline]
ffffffff8d1260a0 (console_owner){-...}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline]
ffffffff8d1260a0 (console_owner){-...}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:292 [inline]
ffffffff8d1260a0 (console_owner){-...}-{0:0}, at: console_flush_all+0x10b/0xcf0 kernel/printk/printk.c:2992

but task is already holding lock:
ffff8880b8e3c298 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x9c/0x130 kernel/sched/core.c:567

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+0x32/0x50 kernel/locking/spinlock.c:378
       raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
       raw_spin_rq_lock kernel/sched/sched.h:1379 [inline]
       rq_lock kernel/sched/sched.h:1688 [inline]
       task_fork_fair+0x62/0x1f0 kernel/sched/fair.c:12728
       sched_cgroup_fork+0x352/0x3e0 kernel/sched/core.c:4818
       copy_process+0x21fd/0x3da0 kernel/fork.c:2619
       kernel_clone+0x24b/0x8a0 kernel/fork.c:2919
       user_mode_thread+0x111/0x180 kernel/fork.c:2997
       rest_init+0x27/0x300 init/main.c:670
       arch_call_rest_init+0xe/0x10 init/main.c:801
       start_kernel+0x461/0x4e0 init/main.c:1046
       x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555
       copy_bootdata+0x0/0xd0 arch/x86/kernel/head64.c:536
       secondary_startup_64_no_verify+0x179/0x17b

-> #3 (&p->pi_lock){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xb4/0x100 kernel/locking/spinlock.c:162
       class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:523 [inline]
       try_to_wake_up+0x5b/0x10e0 kernel/sched/core.c:4233
       __wake_up_common+0x28e/0x4d0 kernel/sched/wait.c:107
       __wake_up_common_lock kernel/sched/wait.c:138 [inline]
       __wake_up+0x125/0x1a0 kernel/sched/wait.c:160
       tty_port_default_wakeup+0xa2/0xf0 drivers/tty/tty_port.c:69
       serial8250_tx_chars+0x6a2/0x8b0 drivers/tty/serial/8250/8250_port.c:1837
       serial8250_handle_irq+0x567/0x730 drivers/tty/serial/8250/8250_port.c:1944
       serial8250_default_handle_irq+0xb8/0x1a0 drivers/tty/serial/8250/8250_port.c:1964
       serial8250_interrupt+0x9f/0x1c0 drivers/tty/serial/8250/8250_core.c:127
       __handle_irq_event_percpu+0x271/0x940 kernel/irq/handle.c:158
       handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
       handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:210
       handle_edge_irq+0x246/0xb20 kernel/irq/chip.c:831
       generic_handle_irq_desc include/linux/irqdesc.h:161 [inline]
       handle_irq arch/x86/kernel/irq.c:240 [inline]
       __common_interrupt+0x13b/0x230 arch/x86/kernel/irq.c:259
       common_interrupt+0xb4/0xd0 arch/x86/kernel/irq.c:249
       asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:678
       native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
       pv_native_safe_halt+0xf/0x10 arch/x86/kernel/paravirt.c:147
       arch_safe_halt arch/x86/include/asm/paravirt.h:108 [inline]
       default_idle+0x13/0x20 arch/x86/kernel/process.c:753
       default_idle_call+0x6c/0xa0 kernel/sched/idle.c:97
       cpuidle_idle_call kernel/sched/idle.c:178 [inline]
       do_idle+0x334/0x5c0 kernel/sched/idle.c:302
       cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:401
       rest_init+0x2e2/0x300 init/main.c:705
       arch_call_rest_init+0xe/0x10 init/main.c:801
       start_kernel+0x461/0x4e0 init/main.c:1046
       x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555
       copy_bootdata+0x0/0xd0 arch/x86/kernel/head64.c:536
       secondary_startup_64_no_verify+0x179/0x17b

-> #2 (&tty->write_wait){-...}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xb4/0x100 kernel/locking/spinlock.c:162
       __wake_up_common_lock kernel/sched/wait.c:137 [inline]
       __wake_up+0x10b/0x1a0 kernel/sched/wait.c:160
       tty_port_default_wakeup+0xa2/0xf0 drivers/tty/tty_port.c:69
       serial8250_tx_chars+0x6a2/0x8b0 drivers/tty/serial/8250/8250_port.c:1837
       serial8250_handle_irq+0x567/0x730 drivers/tty/serial/8250/8250_port.c:1944
       serial8250_default_handle_irq+0xb8/0x1a0 drivers/tty/serial/8250/8250_port.c:1964
       serial8250_interrupt+0x9f/0x1c0 drivers/tty/serial/8250/8250_core.c:127
       __handle_irq_event_percpu+0x271/0x940 kernel/irq/handle.c:158
       handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
       handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:210
       handle_edge_irq+0x246/0xb20 kernel/irq/chip.c:831
       generic_handle_irq_desc include/linux/irqdesc.h:161 [inline]
       handle_irq arch/x86/kernel/irq.c:240 [inline]
       __common_interrupt+0x13b/0x230 arch/x86/kernel/irq.c:259
       common_interrupt+0xb4/0xd0 arch/x86/kernel/irq.c:249
       asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:678
       __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
       _raw_spin_unlock_irqrestore+0xc0/0x120 kernel/locking/spinlock.c:194
       spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
       uart_write+0x45b/0x5d0 drivers/tty/serial/serial_core.c:634
       process_output_block drivers/tty/n_tty.c:580 [inline]
       n_tty_write+0xd3d/0x11e0 drivers/tty/n_tty.c:2395
       iterate_tty_write drivers/tty/tty_io.c:1017 [inline]
       file_tty_write+0x529/0x960 drivers/tty/tty_io.c:1088
       call_write_iter include/linux/fs.h:2018 [inline]
       new_sync_write fs/read_write.c:491 [inline]
       vfs_write+0x474/0x9a0 fs/read_write.c:584
       ksys_write+0x151/0x260 fs/read_write.c:637
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #1 (&port_lock_key){-...}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xb4/0x100 kernel/locking/spinlock.c:162
       serial8250_console_write+0x181/0x18b0 drivers/tty/serial/8250/8250_port.c:3439
       console_emit_next_record kernel/printk/printk.c:2944 [inline]
       console_flush_all+0x6ad/0xcf0 kernel/printk/printk.c:3000
       console_unlock+0xad/0x350 kernel/printk/printk.c:3069
       vprintk_emit+0x497/0x610 kernel/printk/printk.c:2341
       _printk+0xde/0x130 kernel/printk/printk.c:2366
       register_console+0xb96/0xf00 kernel/printk/printk.c:3583
       univ8250_console_init+0x45/0x50 drivers/tty/serial/8250/8250_core.c:717
       console_init+0x17b/0x5d0 kernel/printk/printk.c:3726
       start_kernel+0x2c8/0x4e0 init/main.c:982
       x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555
       copy_bootdata+0x0/0xd0 arch/x86/kernel/head64.c:536
       secondary_startup_64_no_verify+0x179/0x17b

-> #0 (console_owner){-...}-{0:0}:
       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+0x37ef/0x7d80 kernel/locking/lockdep.c:5137
       lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754
       console_lock_spinning_enable kernel/printk/printk.c:1871 [inline]
       console_emit_next_record kernel/printk/printk.c:2938 [inline]
       console_flush_all+0x676/0xcf0 kernel/printk/printk.c:3000
       console_unlock+0xad/0x350 kernel/printk/printk.c:3069
       vprintk_emit+0x497/0x610 kernel/printk/printk.c:2341
       _printk+0xde/0x130 kernel/printk/printk.c:2366
       __report_bug lib/bug.c:195 [inline]
       report_bug+0x34e/0x4f0 lib/bug.c:219
       handle_bug+0xcf/0x120 arch/x86/kernel/traps.c:310
       exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:345
       asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:606
       update_rq_clock+0x32e/0x4b0 kernel/sched/core.c:772
       pick_next_task kernel/sched/core.c:6187 [inline]
       __schedule+0x2c72/0x4660 kernel/sched/core.c:6663
       preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7011
       irqentry_exit+0x67/0x70 kernel/entry/common.c:438
       asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:694
       kasan_check_range+0x1bc/0x290 mm/kasan/generic.c:-1
       instrument_atomic_read include/linux/instrumented.h:68 [inline]
       _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
       folio_test_head include/linux/page-flags.h:798 [inline]
       folio_test_large include/linux/page-flags.h:819 [inline]
       folio_nr_pages include/linux/mm.h:2056 [inline]
       folio_next_index include/linux/pagemap.h:809 [inline]
       find_lock_entries+0x4bd/0x1020 mm/filemap.c:2118
       shmem_undo_range+0x294/0x1a80 mm/shmem.c:1008
       shmem_truncate_range mm/shmem.c:1135 [inline]
       shmem_evict_inode+0x285/0xa70 mm/shmem.c:1264
       evict+0x4b7/0x8a0 fs/inode.c:705
       __dentry_kill+0x412/0x630 fs/dcache.c:611
       dentry_kill+0xb8/0x290 fs/dcache.c:-1
       dput+0xfe/0x1e0 fs/dcache.c:918
       __fput+0x5b2/0x940 fs/file_table.c:426
       task_work_run+0x1d4/0x260 kernel/task_work.c:245
       exit_task_work include/linux/task_work.h:43 [inline]
       do_exit+0x986/0x2530 kernel/exit.c:890
       do_group_exit+0x22d/0x2f0 kernel/exit.c:1032
       get_signal+0x12a6/0x1390 kernel/signal.c:2911
       arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
       exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
       exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
       irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:315
       exc_page_fault+0x8c/0x100 arch/x86/mm/fault.c:1519
       asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608

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 ***

4 locks held by syz.0.1835/12329:
 #0: ffffffff8d131da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 #0: ffffffff8d131da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
 #0: ffffffff8d131da0 (rcu_read_lock){....}-{1:2}, at: find_lock_entries+0x120/0x1020 mm/filemap.c:2113
 #1: ffff8880b8e3c298 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x9c/0x130 kernel/sched/core.c:567
 #2: ffffffff8d126180 (console_lock){+.+.}-{0:0}, at: _printk+0xde/0x130 kernel/printk/printk.c:2366
 #3: ffffffff8d00d990 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:339 [inline]
 #3: ffffffff8d00d990 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline]
 #3: ffffffff8d00d990 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:292 [inline]
 #3: ffffffff8d00d990 (console_srcu){....}-{0:0}, at: console_flush_all+0x10b/0xcf0 kernel/printk/printk.c:2992

stack backtrace:
CPU: 0 PID: 12329 Comm: syz.0.1835 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 check_noncircular+0x2fc/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+0x37ef/0x7d80 kernel/locking/lockdep.c:5137
 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754
 console_lock_spinning_enable kernel/printk/printk.c:1871 [inline]
 console_emit_next_record kernel/printk/printk.c:2938 [inline]
 console_flush_all+0x676/0xcf0 kernel/printk/printk.c:3000
 console_unlock+0xad/0x350 kernel/printk/printk.c:3069
 vprintk_emit+0x497/0x610 kernel/printk/printk.c:2341
 _printk+0xde/0x130 kernel/printk/printk.c:2366
 __report_bug lib/bug.c:195 [inline]
 report_bug+0x34e/0x4f0 lib/bug.c:219
 handle_bug+0xcf/0x120 arch/x86/kernel/traps.c:310
 exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:345
 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:606
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1370 [inline]
RIP: 0010:update_rq_clock+0x32e/0x4b0 kernel/sched/core.c:756
Code: 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 14 fb 82 00 48 01 2b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b e9 62 fd ff ff 48 89 df 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc9000347eec0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b8f3c280 RCX: c28670c32236e200
RDX: 0000000000000003 RSI: ffffffff8acadd60 RDI: ffffffff8b1d32e0
RBP: ffffc9000347f110 R08: ffff8880b8e3c3dc R09: 0000000000000001
R10: ffff88807c52a418 R11: ffffed100f8a5485 R12: ffffffff8ca95a38
R13: dffffc0000000000 R14: ffff8880b8f3cfc8 R15: ffff8880b8f3c280
 pick_next_task kernel/sched/core.c:6187 [inline]
 __schedule+0x2c72/0x4660 kernel/sched/core.c:6663
 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7011
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:694
RIP: 0010:kasan_check_range+0x1bc/0x290 mm/kasan/generic.c:-1
Code: dc 4d 01 f3 49 8d 5c 24 07 4d 85 e4 49 0f 49 dc 48 83 e3 f8 49 29 dc 74 0e 41 80 3b 00 75 6b 49 ff c3 49 ff cc 75 f2 5b 41 5c <41> 5d 41 5e 41 5f 5d c3 45 84 ff 0f 85 91 00 00 00 41 f7 c7 00 ff
RSP: 0018:ffffc9000347f298 EFLAGS: 00000256
RAX: ffffffff81b63001 RBX: 0000000000000333 RCX: ffffffff81b6305d
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea000162b480
RBP: ffffc9000347f3f0 R08: ffffea000162b487 R09: 1ffffd40002c5690
R10: dffffc0000000000 R11: fffff940002c5691 R12: dffffc0000000000
R13: ffffc9000347f5e0 R14: fffff940002c5691 R15: 1ffffd40002c5690
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 folio_test_head include/linux/page-flags.h:798 [inline]
 folio_test_large include/linux/page-flags.h:819 [inline]
 folio_nr_pages include/linux/mm.h:2056 [inline]
 folio_next_index include/linux/pagemap.h:809 [inline]
 find_lock_entries+0x4bd/0x1020 mm/filemap.c:2118
 shmem_undo_range+0x294/0x1a80 mm/shmem.c:1008
 shmem_truncate_range mm/shmem.c:1135 [inline]
 shmem_evict_inode+0x285/0xa70 mm/shmem.c:1264
 evict+0x4b7/0x8a0 fs/inode.c:705
 __dentry_kill+0x412/0x630 fs/dcache.c:611
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xfe/0x1e0 fs/dcache.c:918
 __fput+0x5b2/0x940 fs/file_table.c:426
 task_work_run+0x1d4/0x260 kernel/task_work.c:245
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x986/0x2530 kernel/exit.c:890
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1032
 get_signal+0x12a6/0x1390 kernel/signal.c:2911
 arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:315
 exc_page_fault+0x8c/0x100 arch/x86/mm/fault.c:1519
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f269519e0e1
Code: Unable to access opcode bytes at 0x7f269519e0b7.
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f2695426090 RCX: 00007f269519e0d9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f2695235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f2695426128 R14: 00007f2695426090 R15: 00007fff908f2418
 </TASK>
WARNING: CPU: 0 PID: 12329 at kernel/sched/sched.h:1370 update_rq_clock+0x32e/0x4b0 kernel/sched/core.c:772
Modules linked in:
CPU: 0 PID: 12329 Comm: syz.0.1835 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1370 [inline]
RIP: 0010:update_rq_clock+0x32e/0x4b0 kernel/sched/core.c:756
Code: 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 14 fb 82 00 48 01 2b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b e9 62 fd ff ff 48 89 df 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc9000347eec0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b8f3c280 RCX: c28670c32236e200
RDX: 0000000000000003 RSI: ffffffff8acadd60 RDI: ffffffff8b1d32e0
RBP: ffffc9000347f110 R08: ffff8880b8e3c3dc R09: 0000000000000001
R10: ffff88807c52a418 R11: ffffed100f8a5485 R12: ffffffff8ca95a38
R13: dffffc0000000000 R14: ffff8880b8f3cfc8 R15: ffff8880b8f3c280
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2ef129 CR3: 000000007d4c5000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 pick_next_task kernel/sched/core.c:6187 [inline]
 __schedule+0x2c72/0x4660 kernel/sched/core.c:6663
 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7011
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:694
RIP: 0010:kasan_check_range+0x1bc/0x290 mm/kasan/generic.c:-1
Code: dc 4d 01 f3 49 8d 5c 24 07 4d 85 e4 49 0f 49 dc 48 83 e3 f8 49 29 dc 74 0e 41 80 3b 00 75 6b 49 ff c3 49 ff cc 75 f2 5b 41 5c <41> 5d 41 5e 41 5f 5d c3 45 84 ff 0f 85 91 00 00 00 41 f7 c7 00 ff
RSP: 0018:ffffc9000347f298 EFLAGS: 00000256
RAX: ffffffff81b63001 RBX: 0000000000000333 RCX: ffffffff81b6305d
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea000162b480
RBP: ffffc9000347f3f0 R08: ffffea000162b487 R09: 1ffffd40002c5690
R10: dffffc0000000000 R11: fffff940002c5691 R12: dffffc0000000000
R13: ffffc9000347f5e0 R14: fffff940002c5691 R15: 1ffffd40002c5690
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 folio_test_head include/linux/page-flags.h:798 [inline]
 folio_test_large include/linux/page-flags.h:819 [inline]
 folio_nr_pages include/linux/mm.h:2056 [inline]
 folio_next_index include/linux/pagemap.h:809 [inline]
 find_lock_entries+0x4bd/0x1020 mm/filemap.c:2118
 shmem_undo_range+0x294/0x1a80 mm/shmem.c:1008
 shmem_truncate_range mm/shmem.c:1135 [inline]
 shmem_evict_inode+0x285/0xa70 mm/shmem.c:1264
 evict+0x4b7/0x8a0 fs/inode.c:705
 __dentry_kill+0x412/0x630 fs/dcache.c:611
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xfe/0x1e0 fs/dcache.c:918
 __fput+0x5b2/0x940 fs/file_table.c:426
 task_work_run+0x1d4/0x260 kernel/task_work.c:245
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x986/0x2530 kernel/exit.c:890
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1032
 get_signal+0x12a6/0x1390 kernel/signal.c:2911
 arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:315
 exc_page_fault+0x8c/0x100 arch/x86/mm/fault.c:1519
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f269519e0e1
Code: Unable to access opcode bytes at 0x7f269519e0b7.
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f2695426090 RCX: 00007f269519e0d9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f2695235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f2695426128 R14: 00007f2695426090 R15: 00007fff908f2418
 </TASK>
----------------
Code disassembly (best guess):
   0:	dc 4d 01             	fmull  0x1(%rbp)
   3:	f3 49 8d 5c 24 07    	repz lea 0x7(%r12),%rbx
   9:	4d 85 e4             	test   %r12,%r12
   c:	49 0f 49 dc          	cmovns %r12,%rbx
  10:	48 83 e3 f8          	and    $0xfffffffffffffff8,%rbx
  14:	49 29 dc             	sub    %rbx,%r12
  17:	74 0e                	je     0x27
  19:	41 80 3b 00          	cmpb   $0x0,(%r11)
  1d:	75 6b                	jne    0x8a
  1f:	49 ff c3             	inc    %r11
  22:	49 ff cc             	dec    %r12
  25:	75 f2                	jne    0x19
  27:	5b                   	pop    %rbx
  28:	41 5c                	pop    %r12
* 2a:	41 5d                	pop    %r13 <-- trapping instruction
  2c:	41 5e                	pop    %r14
  2e:	41 5f                	pop    %r15
  30:	5d                   	pop    %rbp
  31:	c3                   	ret
  32:	45 84 ff             	test   %r15b,%r15b
  35:	0f 85 91 00 00 00    	jne    0xcc
  3b:	41                   	rex.B
  3c:	f7                   	.byte 0xf7
  3d:	c7                   	.byte 0xc7
  3e:	00 ff                	add    %bh,%bh