INFO: task syz.3.1824:6256 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1824      state:D stack:0     pid:6256  tgid:6255  ppid:290    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
 ksys_sync+0x95/0x160 fs/sync.c:103
 __ia32_sys_sync+0x12/0x20 fs/sync.c:114
 x64_sys_call+0x2a58/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:163
 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: 0033:0x7f89a218ebe9
RSP: 002b:00007f89a308c038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f89a23b5fa0 RCX: 00007f89a218ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f89a23b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f89a23b6038 R14: 00007f89a23b5fa0 R15: 00007ffc9a7718c8
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 530b3ddaa03db34d09c0fae50fba32de8d319ece
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+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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10962 Comm: syz.7.3316 Not tainted syzkaller #0 530b3ddaa03db34d09c0fae50fba32de8d319ece
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:check_region_inline mm/kasan/generic.c:171 [inline]
RIP: 0010:kasan_check_range+0x15/0x2a0 mm/kasan/generic.c:189
Code: cc cc cc cc cc b8 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 b0 01 48 85 f6 0f 84 c4 01 00 00 55 48 89 e5 41 57 <41> 56 41 55 41 54 53 4c 8d 04 37 49 39 f8 0f 82 68 02 00 00 49 89
RSP: 0018:ffffc900000075d8 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 1ffff110262694c0 RCX: ffffffff815ac2c3
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88813134a600
RBP: ffffc900000075e0 R08: ffff88813134a607 R09: 1ffff110262694c0
R10: dffffc0000000000 R11: ffffed10262694c1 R12: 1ffff92000000ec4
R13: dffffc0000000000 R14: ffff8881f6e506a0 R15: ffff88813134a600
FS:  00007fd03839a6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000010000 CR3: 00000001586a4000 CR4: 00000000003526b0
DR0: 0000000000008009 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __kasan_check_write+0x18/0x20 mm/kasan/shadow.c:37
 instrument_atomic_write include/linux/instrumented.h:82 [inline]
 set_bit include/asm-generic/bitops/instrumented-atomic.h:28 [inline]
 set_ti_thread_flag include/linux/thread_info.h:89 [inline]
 set_tsk_thread_flag include/linux/sched.h:2068 [inline]
 set_tsk_need_resched include/linux/sched.h:2099 [inline]
 resched_curr+0x113/0x430 kernel/sched/core.c:1153
 update_curr_dl_se+0x689/0xb40 kernel/sched/deadline.c:1552
 dl_server_update+0x84/0xc0 kernel/sched/deadline.c:1628
 update_curr+0x4e4/0xaa0 kernel/sched/fair.c:1315
 enqueue_entity+0x62/0xf90 kernel/sched/fair.c:5518
 enqueue_task_fair+0x3fb/0x17e0 kernel/sched/fair.c:7185
 enqueue_task+0x7dc/0x11f0 kernel/sched/core.c:2104
 __activate_task kernel/sched/core.c:2151 [inline]
 activate_task+0x38b/0x3d0 kernel/sched/core.c:2185
 ttwu_do_activate+0x154/0x630 kernel/sched/core.c:4209
 ttwu_queue kernel/sched/core.c:4506 [inline]
 try_to_wake_up+0xd87/0x1b00 kernel/sched/core.c:4845
 wake_up_process+0x14/0x20 kernel/sched/core.c:4980
 hrtimer_wakeup+0x52/0x70 kernel/time/hrtimer.c:1989
 __run_hrtimer kernel/time/hrtimer.c:1753 [inline]
 __hrtimer_run_queues+0x3bd/0x9e0 kernel/time/hrtimer.c:1817
 hrtimer_interrupt+0x37e/0xf00 kernel/time/hrtimer.c:1879
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x8e/0x2b0 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x7d/0x90 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2076 [inline]
RIP: 0010:vprintk_emit+0x530/0x640 kernel/printk/printk.c:2461
Code: 81 e6 00 02 00 00 31 ff e8 8d 22 1e 00 48 81 e3 00 02 00 00 75 07 e8 9f 1d 1e 00 eb 06 e8 98 1d 1e 00 fb c6 05 50 44 31 07 00 <e9> 42 fd ff ff e8 86 1d 1e 00 e9 a5 fe ff ff 41 ff ce bf 58 89 41
RSP: 0018:ffffc9000902f260 EFLAGS: 00000283
RAX: ffffffff8167c6a8 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc9000921f000 RSI: 0000000000007e60 RDI: 0000000000007e61
RBP: ffffc9000902f328 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001205e3c R12: 1ffff92001205e50
R13: 000000000000004d R14: 0000000000000000 R15: dffffc0000000000
 vprintk_default+0x2a/0x40 kernel/printk/printk.c:2477
 vprintk+0x93/0xa0 kernel/printk/printk_safe.c:73
 _printk+0xd0/0x120 kernel/printk/printk.c:2487
 __nla_validate_parse+0x256a/0x2d50 lib/nlattr.c:647
 __nla_parse+0x46/0x60 lib/nlattr.c:732
 __nlmsg_parse include/net/netlink.h:761 [inline]
 nlmsg_parse_deprecated include/net/netlink.h:802 [inline]
 inet_rtm_deladdr+0x1ad/0x770 net/ipv4/devinet.c:682
 rtnetlink_rcv_msg+0x87f/0xa00 net/core/rtnetlink.c:6678
 netlink_rcv_skb+0x22b/0x4a0 net/netlink/af_netlink.c:2537
 rtnetlink_rcv+0x20/0x30 net/core/rtnetlink.c:6696
 netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline]
 netlink_unicast+0x8c9/0xa60 net/netlink/af_netlink.c:1342
 netlink_sendmsg+0x7f0/0xaf0 net/netlink/af_netlink.c:1886
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 __sys_sendto+0x66d/0x6f0 net/socket.c:2217
 __do_sys_sendto net/socket.c:2229 [inline]
 __se_sys_sendto net/socket.c:2225 [inline]
 __x64_sys_sendto+0xe9/0x100 net/socket.c:2225
 x64_sys_call+0x2c2c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:45
 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: 0033:0x7fd03758ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd03839a038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fd0377b5fa0 RCX: 00007fd03758ebe9
RDX: 0000000000010a73 RSI: 0000200000000000 RDI: 0000000000000006
RBP: 00007fd037611e19 R08: 0000000000000000 R09: 4b6ae4f95a5de35b
R10: 0000000000000800 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd0377b6038 R14: 00007fd0377b5fa0 R15: 00007ffc4489a438
 </TASK>