INFO: task syz.1.307:1298 blocked for more than 122 seconds.
Not tainted 6.12.38-syzkaller-gd0c633175c04 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.307 state:D stack:0 pid:1298 tgid:1297 ppid:289 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: 0033:0x7efce3f8ebe9
RSP: 002b:00007efce4dad038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007efce41b5fa0 RCX: 00007efce3f8ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007efce4011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efce41b6038 R14: 00007efce41b5fa0 R15: 00007ffe58486be8
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.38-syzkaller-gd0c633175c04 #0 79f03ae2e0a264f34f505a942aaa3597bcba712e
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+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
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5725 Comm: syz.6.1756 Not tainted 6.12.38-syzkaller-gd0c633175c04 #0 79f03ae2e0a264f34f505a942aaa3597bcba712e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:folios_put_refs+0x3db/0x5c0 mm/swap.c:991
Code: 24 30 48 8b 44 24 20 42 0f b6 04 30 84 c0 75 3e 0f b6 03 49 39 c7 0f 83 80 00 00 00 e8 fe ce c5 ff 49 ff c7 48 83 44 24 10 04 <49> 83 c5 08 e9 11 fd ff ff e8 e7 ce c5 ff 48 c7 c7 60 e2 46 87 48
RSP: 0018:ffffc900010df460 EFLAGS: 00000286
RAX: ffffffff81c00e32 RBX: ffffc900010df5c0 RCX: ffff88811b5e1300
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900010df550 R08: ffffea0004d6ac77 R09: 1ffffd40009ad58e
R10: dffffc0000000000 R11: fffff940009ad58f R12: 0000000000000000
R13: ffffc900010df608 R14: dffffc0000000000 R15: 000000000000000a
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005558d8931b90 CR3: 00000000072a8000 CR4: 00000000003526b0
Call Trace:
free_pages_and_swap_cache+0x272/0x460 mm/swap_state.c:333
__tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
tlb_flush_mmu+0x7ce/0xaf0 mm/mmu_gather.c:373
tlb_finish_mmu+0xcf/0x1d0 mm/mmu_gather.c:465
exit_mmap+0x405/0xb60 mm/mmap.c:1976
__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: 0033:0x7f5c803c14a5
Code: Unable to access opcode bytes at 0x7f5c803c147b.
RSP: 002b:00007f5c81206f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f5c805b5fa0 RCX: 00007f5c803c14a5
RDX: 00007f5c81206fc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f5c80411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f5c805b6038 R14: 00007f5c805b5fa0 R15: 00007fff33111f48