INFO: task syz-executor:5837 blocked for more than 143 seconds.
      Tainted: G        W           syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:17928 pid:5837  tgid:5837  ppid:1      task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 io_schedule+0x81/0xe0 kernel/sched/core.c:7903
 folio_wait_bit_common+0x6b5/0xb90 mm/filemap.c:1317
 __folio_lock mm/filemap.c:1675 [inline]
 folio_lock include/linux/pagemap.h:1133 [inline]
 __filemap_get_folio+0x167/0xa40 mm/filemap.c:1929
 truncate_inode_pages_range+0x3cf/0xb90 mm/truncate.c:388
 evict+0x517/0x9c0 fs/inode.c:812
 dispose_list fs/inode.c:852 [inline]
 evict_inodes+0x64c/0x6d0 fs/inode.c:906
 generic_shutdown_super+0x9a/0x2c0 fs/super.c:628
 kill_block_super+0x44/0x90 fs/super.c:1766
 deactivate_locked_super+0xb9/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1375
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb2e307ff17
RSP: 002b:00007ffe1d3891b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fb2e3101c05 RCX: 00007fb2e307ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe1d389270
RBP: 00007ffe1d389270 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe1d38a300
R13: 00007fb2e3101c05 R14: 000000000004c3fd R15: 00007ffe1d38a340
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Tainted: G        W           syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
 watchdog+0xf93/0xfe0 kernel/hung_task.c:491
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5955 Comm: udevd Tainted: G        W           syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:194 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_switch+0xd4/0x150 kernel/kcov.c:351
Code: 8b 98 0c 0b 00 00 44 21 d3 41 89 de 41 09 ee 74 12 85 ed 75 cc 85 db 74 c8 41 83 b8 d4 15 00 00 00 74 be 41 8b 98 b0 15 00 00 <83> fb 03 75 b2 49 8b 98 b8 15 00 00 45 8b a0 b4 15 00 00 49 c1 e4
RSP: 0018:ffffc90004f074c8 EFLAGS: 00000246
RAX: 0000000000000004 RBX: 0000000000000000 RCX: 0000000000000005
RDX: ffffffff8aee057f RSI: ffffffff8f0434e0 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffff888036e3d940 R09: 0000000000000003
R10: 0000000000000100 R11: 0000000000000003 R12: dffffc0000000000
R13: ffff88803572ac00 R14: 0000000000000000 R15: ffffc90004f076a0
FS:  00007f28d1638880(0000) GS:ffff8881268c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f60d1b356c0 CR3: 000000002a5c4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ma_slots lib/maple_tree.c:772 [inline]
 mas_next_slot+0x83f/0xd00 lib/maple_tree.c:4745
 mas_find+0xb0e/0xd30 lib/maple_tree.c:6062
 vma_next include/linux/mm.h:866 [inline]
 validate_mm+0xe1/0x4b0 mm/vma.c:652
 __split_vma+0x89c/0x9e0 mm/vma.c:569
 vms_gather_munmap_vmas+0x2ea/0x12f0 mm/vma.c:1359
 do_vmi_align_munmap+0x271/0x440 mm/vma.c:1527
 do_vmi_munmap+0x253/0x2e0 mm/vma.c:1584
 __vm_munmap+0x23b/0x3d0 mm/vma.c:3155
 __do_sys_munmap mm/mmap.c:1080 [inline]
 __se_sys_munmap mm/mmap.c:1077 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:1077
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f28d179d097
Code: 73 01 c3 48 8b 0d 61 2d 0d 00 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 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 31 2d 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007ffe4559e708 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 000056305638f730 RCX: 00007f28d179d097
RDX: 0000563056391f18 RSI: 0000000000000200 RDI: 00007f28d0c60000
RBP: 0000000000000009 R08: 0000000000000040 R09: 0000000000000003
R10: 0000000000000040 R11: 0000000000000246 R12: 0000563056381010
R13: 00007f28d1e7c39c R14: 0000000000001200 R15: 0000000000000009
 </TASK>