INFO: task syz.1.10:5837 blocked in I/O wait for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.10        state:D stack:25032 pid:5837  tgid:5836  ppid:5611   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5504 [inline]
 __schedule+0x16dc/0x5500 kernel/sched/core.c:7228
 __schedule_loop kernel/sched/core.c:7307 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7322
 io_schedule+0x80/0xe0 kernel/sched/core.c:8150
 folio_wait_bit_common+0x83c/0xbc0 mm/filemap.c:1324
 folio_lock include/linux/pagemap.h:1159 [inline]
 release_metapage+0x101/0xa50 fs/jfs/jfs_metapage.c:871
 discard_metapage fs/jfs/jfs_metapage.h:88 [inline]
 __get_metapage+0x9ac/0xdf0 fs/jfs/jfs_metapage.c:754
 dtSearch+0x56c/0x2010 fs/jfs/jfs_dtree.c:621
 jfs_lookup+0x1b0/0x420 fs/jfs/namei.c:1464
 __lookup_slow+0x1fb/0x2f0 fs/namei.c:1919
 lookup_slow+0x53/0x70 fs/namei.c:1936
 walk_component fs/namei.c:2282 [inline]
 lookup_last fs/namei.c:2789 [inline]
 path_lookupat+0x3f5/0x8c0 fs/namei.c:2813
 filename_lookup+0x265/0x5d0 fs/namei.c:2842
 do_readlinkat+0xe3/0x510 fs/stat.c:571
 __do_sys_readlinkat fs/stat.c:599 [inline]
 __se_sys_readlinkat fs/stat.c:596 [inline]
 __x64_sys_readlinkat+0x9a/0xb0 fs/stat.c:596
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb42377ce59
RSP: 002b:00007fb4219ce028 EFLAGS: 00000246 ORIG_RAX: 000000000000010b
RAX: ffffffffffffffda RBX: 00007fb4239f5fa0 RCX: 00007fb42377ce59
RDX: 9999999999999999 RSI: 0000200000000300 RDI: ffffffffffffff9c
RBP: 00007fb423812d6f R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fe9c R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb4239f6038 R14: 00007fb4239f5fa0 R15: 00007fff35888b68
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
 watchdog+0xfd7/0x1030 kernel/hung_task.c:561
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 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: 3288 Comm: kworker/u8:13 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:841 [inline]
RIP: 0010:class_rcu_constructor include/linux/rcupdate.h:1183 [inline]
RIP: 0010:unwind_next_frame+0xb0/0x2550 arch/x86/kernel/unwind_orc.c:495
Code: 33 00 4c 8d 2d 00 00 00 00 48 c7 c7 40 0f fc 8d 31 f6 31 d2 b9 02 00 00 00 45 31 c0 45 31 c9 41 55 e8 a4 e1 29 00 48 83 c4 08 <e8> 7b 48 a7 09 85 c0 74 3a e8 e2 20 33 00 84 c0 75 31 e8 69 48 a7
RSP: 0018:ffffc9000ee9f540 EFLAGS: 00000292
RAX: 1a24b77698f3a100 RBX: ffffffff86a2ad81 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8ba7bb00 RDI: ffffffff8ba7bac0
RBP: 1ffff92001dd3ec4 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000ee9f638 R11: ffffffff81afcfd0 R12: dffffc0000000000
R13: ffffffff817691ff R14: ffffc9000ee9f5e8 R15: 1ffff92001dd3ebd
FS:  0000000000000000(0000) GS:ffff88812615c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdaa9cdd000 CR3: 000000005c44c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5334 [inline]
 __kmalloc_node_track_caller_noprof+0x378/0x820 mm/slub.c:5438
 kmalloc_reserve net/core/skbuff.c:637 [inline]
 __alloc_skb+0x2bd/0x7a0 net/core/skbuff.c:715
 alloc_skb include/linux/skbuff.h:1386 [inline]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:819 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline]
 nsim_dev_trap_report_work+0x2b1/0xcb0 drivers/net/netdevsim/dev.c:922
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>