INFO: task syz.2.417:10086 blocked for more than 143 seconds.
      Tainted: G        W           syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.417       state:D stack:24840 pid:10086 tgid:10085 ppid:9034   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 io_schedule+0x81/0xe0 kernel/sched/core.c:7903
 folio_wait_bit_common+0x6b5/0xb90 mm/filemap.c:1317
 folio_lock include/linux/pagemap.h:1133 [inline]
 release_metapage+0x103/0xab0 fs/jfs/jfs_metapage.c:870
 discard_metapage fs/jfs/jfs_metapage.h:88 [inline]
 __get_metapage+0x9a0/0xde0 fs/jfs/jfs_metapage.c:753
 dtSplitPage+0x7f8/0x3b20 fs/jfs/jfs_dtree.c:1471
 dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline]
 dtInsert+0x109b/0x5f40 fs/jfs/jfs_dtree.c:871
 jfs_mkdir+0x6ec/0xa70 fs/jfs/namei.c:270
 vfs_mkdir+0x303/0x510 fs/namei.c:4366
 do_mkdirat+0x247/0x590 fs/namei.c:4399
 __do_sys_mkdirat fs/namei.c:4416 [inline]
 __se_sys_mkdirat fs/namei.c:4414 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4414
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7e00f9d457
RSP: 002b:00007f7dff1fde68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f7dff1fdef0 RCX: 00007f7e00f9d457
RDX: 00000000000001ff RSI: 00002000000000c0 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000000c0
R13: 00007f7dff1fdeb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 39 Comm: khungtaskd Tainted: G        W           syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
 watchdog+0xf93/0xfe0 kernel/hung_task.c:491
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 16 Comm: ktimers/0 Tainted: G        W           syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:update_se+0x122/0x5f0 kernel/sched/fair.c:1165
Code: 74 73 8b 00 4d 89 ee 4d 2b 37 4d 85 f6 0f 8e 93 02 00 00 80 7c 1d 00 00 74 08 4c 89 ff e8 46 74 8b 00 48 8b 04 24 4c 89 68 58 <4c> 8d b8 a8 00 00 00 4c 89 fd 48 c1 ed 03 80 7c 1d 00 00 74 08 4c
RSP: 0018:ffffc90000157a00 EFLAGS: 00000046
RAX: ffff88801ae859c0 RBX: dffffc0000000000 RCX: 1ffff110171076b9
RDX: dffffc0000000000 RSI: ffff88801ae859c0 RDI: ffff8880b883aac0
RBP: 1ffff110035d0b43 R08: ffff88801ae85947 R09: 1ffff110035d0b28
R10: dffffc0000000000 R11: ffffffff81956ff0 R12: ffff8880b883aac0
R13: 0000006ca468f0c8 R14: 00000000000008bf R15: ffff88801ae85a18
FS:  0000000000000000(0000) GS:ffff8881268c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb073d35000 CR3: 000000002732e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 update_curr_rt kernel/sched/rt.c:982 [inline]
 dequeue_task_rt+0x7b/0x790 kernel/sched/rt.c:1454
 block_task kernel/sched/core.c:2155 [inline]
 try_to_block_task kernel/sched/core.c:6585 [inline]
 __schedule+0x5a2/0x4c20 kernel/sched/core.c:6896
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 smpboot_thread_fn+0x5bd/0xa60 kernel/smpboot.c:156
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>