INFO: task syz.3.3098:7181 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.3098      state:D stack:0     pid:7181  tgid:7179  ppid:5489   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5945 [inline]
 __schedule+0x1322/0x1df0 kernel/sched/core.c:7791
 __schedule_loop kernel/sched/core.c:7872 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:7887
 schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x359/0x630 kernel/sched/completion.c:127
 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:419 [inline]
 do_coredump+0x7cf/0x2bd0 fs/coredump.c:581
 get_signal+0x11fd/0x14f0 kernel/signal.c:2918
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 irqentry_exit_to_user_mode+0x4e/0xb0 kernel/entry/common.c:231
 irqentry_exit+0x16/0x60 kernel/entry/common.c:334
 exc_invalid_op+0x42/0x60 arch/x86/kernel/traps.c:354
 asm_exc_invalid_op+0x1f/0x30 arch/x86/include/asm/idtentry.h:621
RIP: 0033:0x200000000000
RSP: 002b:00007f8e8dc03a78 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00007f8e8cfe6090 RCX: 00007f8e8cd8f6c9
RDX: 00007f8e8dc03a80 RSI: 00007f8e8dc03bb0 RDI: 000000000000000d
RBP: 00007f8e8ce11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e8cfe6128 R14: 00007f8e8cfe6090 R15: 00007fffdf108db8
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
 watchdog+0xd8f/0xed0 kernel/hung_task.c:423
 kthread+0x2ca/0x370 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 13295 Comm: syz-executor Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0xc/0x90 kernel/kcov.c:314
Code: 48 89 44 11 20 5d e9 83 b8 09 04 cc 66 90 b8 62 cb 05 3e 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 48 8b 45 08 <65> 48 8b 14 25 00 eb 04 00 65 8b 0d fc e7 7e 7e 81 e1 00 01 ff 00
RSP: 0018:ffffc9000164f4f0 EFLAGS: 00000082
RAX: ffffffff858bb855 RBX: 0000000000000008 RCX: ffff888122ec5f00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000002
RBP: ffffc9000164f4f0 R08: ffff88814a95f0ff R09: 1ffff1102952be1f
R10: dffffc0000000000 R11: ffffed102952be20 R12: ffff88814cb0a734
R13: dffffc0000000000 R14: ffffc9000164f5c0 R15: 0000000000000002
FS:  00005555876fc500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555877174a8 CR3: 0000000131452000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 xas_init_marks+0x1b5/0x2d0 lib/xarray.c:949
 page_cache_delete mm/filemap.c:166 [inline]
 __filemap_remove_folio+0x27a/0x410 mm/filemap.c:259
 filemap_remove_folio+0x10e/0x460 mm/filemap.c:291
 truncate_inode_folio+0x61/0x80 mm/truncate.c:182
 shmem_undo_range+0x35d/0x1140 mm/shmem.c:1039
 shmem_truncate_range mm/shmem.c:1156 [inline]
 shmem_evict_inode+0x26e/0xa00 mm/shmem.c:1284
 evict+0x4d3/0xa90 fs/inode.c:730
 iput_final fs/inode.c:1889 [inline]
 iput+0x639/0x8d0 fs/inode.c:1915
 do_unlinkat+0x38b/0x5a0 fs/namei.c:4540
 __do_sys_unlink fs/namei.c:4581 [inline]
 __se_sys_unlink fs/namei.c:4579 [inline]
 __x64_sys_unlink+0x4b/0x60 fs/namei.c:4579
 x64_sys_call+0x286c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:88
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f3705b8ec77
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 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:00007fffc5093df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3705b8ec77
RDX: 00007fffc5093e20 RSI: 00007fffc5093eb0 RDI: 00007fffc5093eb0
RBP: 00007fffc5093eb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007fffc5094f40
R13: 00007f3705c11d7d R14: 00000000000416da R15: 00007fffc5094f80
 </TASK>