INFO: task syz.5.1184:3862 blocked for more than 225 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.1184      state:D stack:0     pid:3862  tgid:3861  ppid:2127   flags:0x00004004
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
 super_lock+0x150/0x300 fs/super.c:115
 super_lock_shared fs/super.c:140 [inline]
 iterate_supers+0x8a/0x560 fs/super.c:934
 quota_sync_all fs/quota/quota.c:69 [inline]
 __do_sys_quotactl fs/quota/quota.c:938 [inline]
 __se_sys_quotactl+0x308/0x7d0 fs/quota/quota.c:917
 __x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:917
 x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
 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: 0033:0x7f0df4d8ebe9
RSP: 002b:00007f0df5bee038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f0df4fc5fa0 RCX: 00007f0df4d8ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007f0df4e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0df4fc6038 R14: 00007f0df4fc5fa0 R15: 00007ffd27b94448
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 3f7d833acb9715dc4d925f14855ea176aa3f9a02
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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+0x2c7/0x370 kernel/kthread.c:389
 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 13574 Comm: syz-executor Not tainted syzkaller #0 3f7d833acb9715dc4d925f14855ea176aa3f9a02
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x1c/0x90 kernel/kcov.c:314
Code: 02 bd f0 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 ec 03 7f 7e <81> e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba ec 0b 00 00
RSP: 0018:ffffc9000106f4a8 EFLAGS: 00000246
RAX: ffffffff81cfd102 RBX: ffffc9000106f948 RCX: 0000000080000001
RDX: ffff88810ca4a600 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffc9000106f4a8 R08: ffffea000510b2f3 R09: 1ffffd4000a2165e
R10: dffffc0000000000 R11: fffff94000a2165f R12: 0000000000000001
R13: ffffea000510b2c0 R14: 0000000000000000 R15: ffff888128600000
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe2396ff5c CR3: 0000000154e10000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 __tlb_remove_folio_pages_size+0x62/0x520 mm/mmu_gather.c:184
 __tlb_remove_folio_pages+0x2f/0x50 mm/mmu_gather.c:208
 zap_present_folio_ptes mm/memory.c:1536 [inline]
 zap_present_ptes mm/memory.c:1590 [inline]
 zap_pte_range mm/memory.c:1633 [inline]
 zap_pmd_range mm/memory.c:1763 [inline]
 zap_pud_range mm/memory.c:1792 [inline]
 zap_p4d_range mm/memory.c:1813 [inline]
 unmap_page_range+0x288a/0x3f80 mm/memory.c:1834
 unmap_single_vma mm/memory.c:1880 [inline]
 unmap_vmas+0x2c5/0x3e0 mm/memory.c:1924
 exit_mmap+0x25b/0xb60 mm/mmap.c:1962
 __mmput+0x93/0x320 kernel/fork.c:1349
 mmput+0x55/0x170 kernel/fork.c:1372
 exit_mm kernel/exit.c:574 [inline]
 do_exit+0x918/0x2630 kernel/exit.c:940
 do_group_exit+0x22a/0x300 kernel/exit.c:1095
 get_signal+0x139d/0x14f0 kernel/signal.c:2933
 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]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fadce384e13
Code: Unable to access opcode bytes at 0x7fadce384de9.
RSP: 002b:00007fff2ac99d18 EFLAGS: 00000202 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 0000000000003509 RCX: 00007fadce384e13
RDX: 0000000040000000 RSI: 00007fff2ac99d2c RDI: 00000000ffffffff
RBP: 00007fff2ac99d2c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
 </TASK>