INFO: task syz.7.5547:17045 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.5547 state:D stack:0 pid:17045 tgid:17044 ppid:12686 flags:0x00004004
Call Trace:
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: 0033:0x7fdcae58ebe9
RSP: 002b:00007fdcacfe3038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fdcae7c5fa0 RCX: 00007fdcae58ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101
RBP: 00007fdcae611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdcae7c6038 R14: 00007fdcae7c5fa0 R15: 00007fff4dd58f08
INFO: task syz.7.5547:17046 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.5547 state:D stack:0 pid:17046 tgid:17044 ppid:12686 flags:0x00004004
Call Trace:
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: 0033:0x7fdcae58ebe9
RSP: 002b:00007fdcacfc2038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fdcae7c6090 RCX: 00007fdcae58ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007fdcae611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdcae7c6128 R14: 00007fdcae7c6090 R15: 00007fff4dd58f08
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 487852573998b859d95f7a0f07f96e56ce6678e4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__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+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 20822 Comm: syz.8.6793 Not tainted syzkaller #0 487852573998b859d95f7a0f07f96e56ce6678e4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:tlb_flush_pte_range include/asm-generic/tlb.h:-1 [inline]
RIP: 0010:tlb_remove_tlb_entries include/asm-generic/tlb.h:631 [inline]
RIP: 0010:zap_present_folio_ptes mm/memory.c:1525 [inline]
RIP: 0010:zap_present_ptes mm/memory.c:1590 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1633 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1763 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1792 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1813 [inline]
RIP: 0010:unmap_page_range+0x1b07/0x3f80 mm/memory.c:1834
Code: 8b 4c 24 30 4c 89 31 48 bb 00 00 00 00 00 fc ff df 48 8b 44 24 70 0f b6 04 18 84 c0 48 8b 54 24 08 0f 85 c4 0e 00 00 80 0a 10 <48> 8b 44 24 50 49 89 c6 49 c1 ee 03 41 80 3c 1e 00 74 0f 48 8b 7c
RSP: 0018:ffffc90005a8f540 EFLAGS: 00000206
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffc90005a8f938
RDX: ffffc90005a8f940 RSI: 840000011b5c6005 RDI: ffff888116dd0640
RBP: ffffc90005a8f770 R08: ffffea00046d7187 R09: 1ffffd40008dae30
R10: dffffc0000000000 R11: fffff940008dae31 R12: 0000000000000000
R13: 840000011b5c6005 R14: ffffffffffffffff R15: 00007f36ad8b0000
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005602fcaf6b98 CR3: 000000010bf52000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000008d00c0ed
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
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: 0033:0x7f36ad7c14a5
Code: Unable to access opcode bytes at 0x7f36ad7c147b.
RSP: 002b:00007f36ae55cf80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f36ad9c5fa0 RCX: 00007f36ad7c14a5
RDX: 00007f36ae55cfc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f36ad811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f36ad9c6038 R14: 00007f36ad9c5fa0 R15: 00007ffe7f5fc658