INFO: task syz.1.5651:17324 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.5651      state:D stack:0     pid:17324 tgid:17323 ppid:11558  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: 0033:0x7f4d0fd8f6c9
RSP: 002b:00007f4d10cd6038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f4d0ffe5fa0 RCX: 00007f4d0fd8f6c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101
RBP: 00007f4d0fe11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4d0ffe6038 R14: 00007f4d0ffe5fa0 R15: 00007ffce9cf4da8
 </TASK>
INFO: task syz.1.5651:17325 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.5651      state:D stack:0     pid:17325 tgid:17323 ppid:11558  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: 0033:0x7f4d0fd8f6c9
RSP: 002b:00007f4d10cb5038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f4d0ffe6090 RCX: 00007f4d0fd8f6c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f4d0fe11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4d0ffe6128 R14: 00007f4d0ffe6090 R15: 00007ffce9cf4da8
 </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: 23250 Comm: udevd Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:do_user_addr_fault+0x53/0x1200 arch/x86/mm/fault.c:1222
Code: 2e 41 00 65 48 8b 04 25 00 eb 04 00 48 89 45 a0 48 8d 98 c8 05 00 00 48 89 d8 48 c1 e8 03 48 89 85 68 ff ff ff 42 80 3c 38 00 <74> 08 48 89 df e8 d3 9b 97 00 48 89 9d 78 ff ff ff 48 8b 03 48 89
RSP: 0000:ffffc9000387fe50 EFLAGS: 00000046
RAX: 1ffff110227550b9 RBX: ffff888113aa85c8 RCX: ffff888113aa8000
RDX: 0000000000000000 RSI: 0000000000000007 RDI: ffffc9000387ff58
RBP: ffffc9000387ff18 R08: 000000000000002b R09: 000000000000002b
R10: 0000000000010246 R11: 00007ffd15b0d580 R12: 000056098f69c130
R13: ffffc9000387ff58 R14: 0000000000000007 R15: dffffc0000000000
FS:  00007ff0619d9880(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056098f69c130 CR3: 000000014be48000 CR4: 00000000003526b0
DR0: 0000000000000074 DR1: 0000000000200004 DR2: 0800000100000000
DR3: 0000000000000008 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x59/0xc0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x56097efcdb42
Code: 48 0f 44 c2 c3 0f 1f 00 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 53 48 89 fb 48 83 ec 08 48 8b 7f 18 e8 fe 6d fd ff <48> c7 43 18 00 00 00 00 48 89 df 48 c7 43 20 00 00 00 00 e8 76 ff
RSP: 002b:00007ffd15b0d580 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 000056098f69c118 RCX: 0000000000000010
RDX: 000056098f6a2bf0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000056098f4642c0 R08: 0000000000000001 R09: 0000000000000010
R10: 000056097efeb5e0 R11: 0000000000000004 R12: 00007ffd15b0d5b0
R13: 00007ffd15b0d660 R14: 0000000000000000 R15: 0000000000000000
 </TASK>