INFO: task syz.2.588:11781 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.2.588       state:D stack:27480 pid:11781 tgid:11757 ppid:7396   task_flags:0x400040 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_one_qstr_excl+0x12d/0x360 fs/namei.c:1810
 __start_dirop fs/namei.c:2920 [inline]
 start_dirop fs/namei.c:2942 [inline]
 filename_create+0x20e/0x370 fs/namei.c:4951
 filename_mkdirat+0xd2/0x520 fs/namei.c:5298
 __do_sys_mkdir fs/namei.c:5332 [inline]
 __se_sys_mkdir+0x34/0x150 fs/namei.c:5329
 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: 0033:0x7ff91f58ce59
RSP: 002b:00007ff91d7a4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ff91f806180 RCX: 00007ff91f58ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007ff91f622e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff91f806218 R14: 00007ff91f806180 R15: 00007ffe56c6eff8
 </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: 12 Comm: kworker/u8:0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: loop3 loop_rootcg_workfn
RIP: 0010:kasan_check_range+0x0/0x2c0 mm/kasan/generic.c:199
Code: fe 90 0f 0b 48 89 df 48 c7 c6 4e 46 88 8d e8 47 dc f9 fe 90 0f 0b cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <0f> 1f 40 d6 55 41 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 ae
RSP: 0018:ffffc900001172b8 EFLAGS: 00000246
RAX: ffffffff8203dde2 RBX: 0000000000000018 RCX: ffffffff8203de21
RDX: 0000000000000001 RSI: 0000000000000018 RDI: ffffc90000117340
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff820d52b0 R12: 1ffff92000022e60
R13: dffffc0000000000 R14: ffffc90000117340 R15: ffff88806618cd18
FS:  0000000000000000(0000) GS:ffff88812615c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f08e6d29000 CR3: 000000005b2dc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __asan_memset+0x22/0x50 mm/kasan/shadow.c:84
 filemap_get_entry+0xc1/0x3f0 mm/filemap.c:1895
 shmem_get_folio_gfp+0x32c/0x1b70 mm/shmem.c:2486
 shmem_get_folio mm/shmem.c:2668 [inline]
 shmem_file_read_iter+0x1b8/0x8a0 mm/shmem.c:3363
 lo_rw_aio+0xc78/0xf30 include/linux/percpu-rwsem.h:-1
 do_req_filebacked drivers/block/loop.c:431 [inline]
 loop_handle_cmd drivers/block/loop.c:1921 [inline]
 loop_process_work+0x92f/0x11d0 drivers/block/loop.c:1956
 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>