------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.2.1769/12994 is trying to acquire lock:
ffffffff8e126640 (console_owner){-...}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:339 [inline]
ffffffff8e126640 (console_owner){-...}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline]
ffffffff8e126640 (console_owner){-...}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:292 [inline]
ffffffff8e126640 (console_owner){-...}-{0:0}, at: console_flush_all+0x10b/0xcf0 kernel/printk/printk.c:2992

but task is already holding lock:
ffff8880b8c3c258 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x9c/0x130 kernel/sched/core.c:578

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:570
       raw_spin_rq_lock kernel/sched/sched.h:1380 [inline]
       rq_lock kernel/sched/sched.h:1689 [inline]
       task_fork_fair+0x62/0x1f0 kernel/sched/fair.c:12738
       sched_cgroup_fork+0x352/0x3e0 kernel/sched/core.c:4829
       copy_process+0x21fd/0x3da0 kernel/fork.c:2622
       kernel_clone+0x24b/0x8a0 kernel/fork.c:2922
       user_mode_thread+0x111/0x180 kernel/fork.c:3000
       rest_init+0x27/0x300 init/main.c:675
       arch_call_rest_init+0xe/0x10 init/main.c:806
       start_kernel+0x461/0x4e0 init/main.c:1051
       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:4244
       __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+0x6c3/0x8c0 drivers/tty/serial/8250/8250_port.c:1951
       serial8250_default_handle_irq+0xb8/0x1a0 drivers/tty/serial/8250/8250_port.c:1971
       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+0x5d/0xd0 arch/x86/kernel/irq.c:249
       asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:678
       native_irq_enable arch/x86/include/asm/irqflags.h:-1 [inline]
       arch_local_irq_enable arch/x86/include/asm/irqflags.h:99 [inline]
       handle_softirqs+0x1ab/0x820 kernel/softirq.c:562
       __do_softirq kernel/softirq.c:612 [inline]
       invoke_softirq kernel/softirq.c:452 [inline]
       __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
       irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
       instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
       sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
       asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
       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
       start_secondary+0xee/0xf0 arch/x86/kernel/smpboot.c:323
       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+0x6c3/0x8c0 drivers/tty/serial/8250/8250_port.c:1951
       serial8250_default_handle_irq+0xb8/0x1a0 drivers/tty/serial/8250/8250_port.c:1971
       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+0x5d/0xd0 arch/x86/kernel/irq.c:249
       asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:678
       native_irq_enable arch/x86/include/asm/irqflags.h:-1 [inline]
       arch_local_irq_enable arch/x86/include/asm/irqflags.h:99 [inline]
       handle_softirqs+0x1ab/0x820 kernel/softirq.c:562
       __do_softirq kernel/softirq.c:612 [inline]
       invoke_softirq kernel/softirq.c:452 [inline]
       __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
       irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
       instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
       sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
       asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
       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
       start_secondary+0xee/0xf0 arch/x86/kernel/smpboot.c:323
       secondary_startup_64_no_verify+0x179/0x17b

-> #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:3446
       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:987
       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:3162 [inline]
       check_prevs_add kernel/locking/lockdep.c:3281 [inline]
       validate_chain kernel/locking/lockdep.c:3897 [inline]
       __lock_acquire+0x3a07/0x7eb0 kernel/locking/lockdep.c:5171
       lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5790
       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:783
       pick_next_task kernel/sched/core.c:6200 [inline]
       __schedule+0x2cb2/0x4720 kernel/sched/core.c:6684
       preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7032
       irqentry_exit+0x67/0x70 kernel/entry/common.c:441
       asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:694
       check_kcov_mode kernel/kcov.c:178 [inline]
       __sanitizer_cov_trace_pc+0x30/0x60 kernel/kcov.c:212
       fatal_signal_pending include/linux/sched/signal.h:434 [inline]
       __get_user_pages+0x513/0x1580 mm/gup.c:1159
       __get_user_pages_locked mm/gup.c:1431 [inline]
       get_dump_page+0x10c/0x200 mm/gup.c:1939
       dump_user_range+0x12c/0x7c0 fs/coredump.c:983
       elf_core_dump+0x320e/0x37c0 fs/binfmt_elf.c:2184
       do_coredump+0x19b8/0x2960 fs/coredump.c:834
       get_signal+0x10da/0x1390 kernel/signal.c:2913
       arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
       exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:177
       exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:213
       irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:318
       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 ***

5 locks held by syz.2.1769/12994:
 #0: ffff888078ff6418 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x198b/0x2960 fs/coredump.c:833
 #1: ffff888025e027a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable include/linux/mmap_lock.h:155 [inline]
 #1: ffff888025e027a0 (&mm->mmap_lock){++++}-{3:3}, at: __get_user_pages_locked mm/gup.c:1406 [inline]
 #1: ffff888025e027a0 (&mm->mmap_lock){++++}-{3:3}, at: get_dump_page+0xb6/0x200 mm/gup.c:1939
 #2: ffff8880b8c3c258 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x9c/0x130 kernel/sched/core.c:578
 #3: ffffffff8e126720 (console_lock){+.+.}-{0:0}, at: _printk+0xde/0x130 kernel/printk/printk.c:2366
 #4: ffffffff8e00df30 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:339 [inline]
 #4: ffffffff8e00df30 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline]
 #4: ffffffff8e00df30 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:292 [inline]
 #4: ffffffff8e00df30 (console_srcu){....}-{0:0}, at: console_flush_all+0x10b/0xcf0 kernel/printk/printk.c:2992

stack backtrace:
CPU: 0 PID: 12994 Comm: syz.2.1769 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 check_noncircular+0x2fc/0x400 kernel/locking/lockdep.c:2215
 check_prev_add kernel/locking/lockdep.c:3162 [inline]
 check_prevs_add kernel/locking/lockdep.c:3281 [inline]
 validate_chain kernel/locking/lockdep.c:3897 [inline]
 __lock_acquire+0x3a07/0x7eb0 kernel/locking/lockdep.c:5171
 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5790
 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:1371 [inline]
RIP: 0010:update_rq_clock+0x32e/0x4b0 kernel/sched/core.c:767
Code: 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 04 a0 83 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:ffffc90004f46e60 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b8d3c240 RCX: 9dbc21bbf32a7f00
RDX: 0000000000000003 RSI: ffffffff8aeae2c0 RDI: ffffffff8b3c5260
RBP: ffffc90004f470b0 R08: ffffffff8f8dda6f R09: 1ffffffff1f1bb4d
R10: dffffc0000000000 R11: fffffbfff1f1bb4e R12: ffffffff8ccbca38
R13: dffffc0000000000 R14: ffff8880b8d3cf88 R15: ffff8880b8d3c240
 pick_next_task kernel/sched/core.c:6200 [inline]
 __schedule+0x2cb2/0x4720 kernel/sched/core.c:6684
 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7032
 irqentry_exit+0x67/0x70 kernel/entry/common.c:441
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:694
RIP: 0010:check_kcov_mode kernel/kcov.c:180 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x30/0x60 kernel/kcov.c:212
Code: 04 24 65 48 8b 0d 50 d9 7b 7e 65 8b 15 51 d9 7b 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 24 16 00 00 00 74 2c <8b> 91 00 16 00 00 83 fa 02 75 21 48 8b 91 08 16 00 00 48 8b 32 48
RSP: 0018:ffffc90004f47238 EFLAGS: 00000246
RAX: ffffffff81c952c3 RBX: 0000000000000000 RCX: ffff888029c05a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004f473b0 R08: ffff888029c05a07 R09: 1ffff11005380b40
R10: dffffc0000000000 R11: ffffed1005380b41 R12: ffff88806b2ac300
R13: ffff888029c06350 R14: ffff888029c05a00 R15: 000000000000000e
 fatal_signal_pending include/linux/sched/signal.h:434 [inline]
 __get_user_pages+0x513/0x1580 mm/gup.c:1159
 __get_user_pages_locked mm/gup.c:1431 [inline]
 get_dump_page+0x10c/0x200 mm/gup.c:1939
 dump_user_range+0x12c/0x7c0 fs/coredump.c:983
 elf_core_dump+0x320e/0x37c0 fs/binfmt_elf.c:2184
 do_coredump+0x19b8/0x2960 fs/coredump.c:834
 get_signal+0x10da/0x1390 kernel/signal.c:2913
 arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:213
 irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:318
 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: 0033:0x7f15017a8fe1
Code: 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f1501a26090 RCX: 00007f15017a8fd9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f1501837fed R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f1501a26128 R14: 00007f1501a26090 R15: 00007ffe30935cc8
 </TASK>
WARNING: CPU: 0 PID: 12994 at kernel/sched/sched.h:1371 update_rq_clock+0x32e/0x4b0 kernel/sched/core.c:783
Modules linked in:
CPU: 0 PID: 12994 Comm: syz.2.1769 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1371 [inline]
RIP: 0010:update_rq_clock+0x32e/0x4b0 kernel/sched/core.c:767
Code: 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 04 a0 83 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:ffffc90004f46e60 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b8d3c240 RCX: 9dbc21bbf32a7f00
RDX: 0000000000000003 RSI: ffffffff8aeae2c0 RDI: ffffffff8b3c5260
RBP: ffffc90004f470b0 R08: ffffffff8f8dda6f R09: 1ffffffff1f1bb4d
R10: dffffc0000000000 R11: fffffbfff1f1bb4e R12: ffffffff8ccbca38
R13: dffffc0000000000 R14: ffff8880b8d3cf88 R15: ffff8880b8d3c240
FS:  00007f15026fc6c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8e731556c8 CR3: 000000005e2f5000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 pick_next_task kernel/sched/core.c:6200 [inline]
 __schedule+0x2cb2/0x4720 kernel/sched/core.c:6684
 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7032
 irqentry_exit+0x67/0x70 kernel/entry/common.c:441
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:694
RIP: 0010:check_kcov_mode kernel/kcov.c:180 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x30/0x60 kernel/kcov.c:212
Code: 04 24 65 48 8b 0d 50 d9 7b 7e 65 8b 15 51 d9 7b 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 24 16 00 00 00 74 2c <8b> 91 00 16 00 00 83 fa 02 75 21 48 8b 91 08 16 00 00 48 8b 32 48
RSP: 0018:ffffc90004f47238 EFLAGS: 00000246
RAX: ffffffff81c952c3 RBX: 0000000000000000 RCX: ffff888029c05a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004f473b0 R08: ffff888029c05a07 R09: 1ffff11005380b40
R10: dffffc0000000000 R11: ffffed1005380b41 R12: ffff88806b2ac300
R13: ffff888029c06350 R14: ffff888029c05a00 R15: 000000000000000e
 fatal_signal_pending include/linux/sched/signal.h:434 [inline]
 __get_user_pages+0x513/0x1580 mm/gup.c:1159
 __get_user_pages_locked mm/gup.c:1431 [inline]
 get_dump_page+0x10c/0x200 mm/gup.c:1939
 dump_user_range+0x12c/0x7c0 fs/coredump.c:983
 elf_core_dump+0x320e/0x37c0 fs/binfmt_elf.c:2184
 do_coredump+0x19b8/0x2960 fs/coredump.c:834
 get_signal+0x10da/0x1390 kernel/signal.c:2913
 arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:213
 irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:318
 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: 0033:0x7f15017a8fe1
Code: 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f1501a26090 RCX: 00007f15017a8fd9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f1501837fed R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f1501a26128 R14: 00007f1501a26090 R15: 00007ffe30935cc8
 </TASK>
----------------
Code disassembly (best guess):
   0:	04 24                	add    $0x24,%al
   2:	65 48 8b 0d 50 d9 7b 	mov    %gs:0x7e7bd950(%rip),%rcx        # 0x7e7bd95a
   9:	7e
   a:	65 8b 15 51 d9 7b 7e 	mov    %gs:0x7e7bd951(%rip),%edx        # 0x7e7bd962
  11:	81 e2 00 01 ff 00    	and    $0xff0100,%edx
  17:	74 11                	je     0x2a
  19:	81 fa 00 01 00 00    	cmp    $0x100,%edx
  1f:	75 35                	jne    0x56
  21:	83 b9 24 16 00 00 00 	cmpl   $0x0,0x1624(%rcx)
  28:	74 2c                	je     0x56
* 2a:	8b 91 00 16 00 00    	mov    0x1600(%rcx),%edx <-- trapping instruction
  30:	83 fa 02             	cmp    $0x2,%edx
  33:	75 21                	jne    0x56
  35:	48 8b 91 08 16 00 00 	mov    0x1608(%rcx),%rdx
  3c:	48 8b 32             	mov    (%rdx),%rsi
  3f:	48                   	rex.W