syzbot


INFO: task hung in vfs_open

Status: auto-obsoleted due to no activity on 2025/08/01 15:04
Subsystems: f2fs
[Documentation on labels]
First crash: 111d, last: 111d

Sample crash report:
INFO: task syz.7.250:8287 blocked for more than 143 seconds.
      Not tainted 6.15.0-rc4-syzkaller-00256-g95d3481af6dc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.250       state:D
 stack:23848 pid:8287  tgid:8239  ppid:7897   task_flags:0x400140 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x168f/0x4c70 kernel/sched/core.c:6767
 vfs_open+0x3b/0x340 fs/open.c:1086
RSP: 002b:00007f0d28d59038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f0d281b6080 RCX: 00007f0d27f8e969
RDX: 0000000000101042 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f0d28010ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0d281b6080 R15: 00007ffdb1c83ec8
 </TASK>
 stack:28344 pid:8291  tgid:8239  ppid:7897   task_flags:0x400140 flags:0x00000004
Call Trace:
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6860
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
 rwsem_down_write_slowpath+0xbec/0x1030 kernel/locking/rwsem.c:1176
 __down_write_common kernel/locking/rwsem.c:1304 [inline]
 __down_write kernel/locking/rwsem.c:1313 [inline]
 down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1578
 inode_lock include/linux/fs.h:867 [inline]
 finish_preallocate_blocks fs/f2fs/file.c:559 [inline]
 f2fs_file_open+0x122/0x3e0 fs/f2fs/file.c:612
 do_dentry_open+0xdf0/0x1970 fs/open.c:956
 vfs_open+0x3b/0x340 fs/open.c:1086
 do_open fs/namei.c:3880 [inline]
 path_openat+0x2ee5/0x3830 fs/namei.c:4039
 do_filp_open+0x1fa/0x410 fs/namei.c:4066

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/03 14:54 upstream 95d3481af6dc b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in vfs_open
* Struck through repros no longer work on HEAD.