INFO: task syz.8.1356:15204 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.8.1356      state:D stack:25144 pid:15204 tgid:15203 ppid:12773  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
 user_path_at+0x40/0x160 fs/namei.c:3641
 do_mount fs/namespace.c:4171 [inline]
 __do_sys_mount fs/namespace.c:4390 [inline]
 __se_sys_mount+0x2dc/0x420 fs/namespace.c:4367
 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: 0033:0x7f4f7cd2ce59
RSP: 002b:00007f4f7af7e028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4f7cfa5fa0 RCX: 00007f4f7cd2ce59
RDX: 0000200000000080 RSI: 0000200000000040 RDI: 0000000000000000
RBP: 00007f4f7cdc2d6f R08: 00002000000000c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4f7cfa6038 R14: 00007f4f7cfa5fa0 R15: 00007ffd8b580358
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 17943 Comm: syz.5.1678 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x80 kernel/kcov.c:210
Code: 89 fb e8 23 00 00 00 48 8b 3d f4 a8 c7 0b 48 89 de 5b e9 c3 c2 5d 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0d 98 48 a7 10 65 8b 35 b9 48 a7
RSP: 0018:ffffc900109176b0 EFLAGS: 00000246
RAX: 1ffff1100be46f15 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: ffffc9000d5d9000 RSI: 00000000000164a4 RDI: 00000000000164a5
RBP: 00000000000004f0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f127ff R12: 0000000000000030
R13: ffff88805f237700 R14: ffff88805f2378a8 R15: 0000000000000000
FS:  00007f53d139e6c0(0000) GS:ffff88812625d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe9754e1000 CR3: 000000003a1f6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __radix_tree_create lib/radix-tree.c:620 [inline]
 radix_tree_insert+0x34a/0x670 lib/radix-tree.c:712
 __insert_free_nid fs/f2fs/node.c:2332 [inline]
 add_free_nid+0x32a/0xb70 fs/f2fs/node.c:2463
 scan_nat_page fs/f2fs/node.c:2518 [inline]
 __f2fs_build_free_nids fs/f2fs/node.c:2624 [inline]
 f2fs_build_free_nids+0xfdf/0x1890 fs/f2fs/node.c:2670
 f2fs_fill_super+0x4c28/0x7760 fs/f2fs/super.c:5178
 get_tree_bdev_flags+0x430/0x4f0 fs/super.c:1634
 vfs_get_tree+0x92/0x2a0 fs/super.c:1694
 fc_mount fs/namespace.c:1198 [inline]
 do_new_mount_fc fs/namespace.c:3765 [inline]
 do_new_mount+0x319/0xdc0 fs/namespace.c:3841
 do_mount fs/namespace.c:4174 [inline]
 __do_sys_mount fs/namespace.c:4390 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4367
 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: 0033:0x7f53d314e0ca
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f53d139de58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f53d139dee0 RCX: 00007f53d314e0ca
RDX: 0000200000000040 RSI: 0000200000000680 RDI: 00007f53d139dea0
RBP: 0000200000000040 R08: 00007f53d139dee0 R09: 0000000000800000
R10: 0000000000800000 R11: 0000000000000246 R12: 0000200000000680
R13: 00007f53d139dea0 R14: 0000000000005504 R15: 00002000000007c0
 </TASK>