INFO: task hung in fuse_flush

Status: auto-obsoleted due to no activity on 2024/09/30 23:08
Reported-by: syzbot+e3922ce921cccbb16e24@syzkaller.appspotmail.com
First crash: 768d, last: 768d
▶ ▼ Similar bugs (15)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-12 INFO: task hung in fuse_flush 1 2 285d 314d 0/1 auto-obsoleted due to no activity on 2026/01/16 20:08
android-6-12 INFO: task hung in fuse_flush (2) 1 2 93d 124d 0/1 auto-obsoleted due to no activity on 2026/07/28 01:02
upstream INFO: task hung in fuse_flush (5) fuse 1 3 507d 512d 0/29 auto-obsoleted due to no activity on 2025/06/08 10:49
linux-4.19 INFO: task hung in fuse_flush 1 1 1960d 1960d 0/1 auto-closed as invalid on 2021/07/16 16:14
linux-6.6 INFO: task hung in fuse_flush (2) 1 2 32d 43d 0/2 upstream: reported on 2026/06/18 01:32
linux-6.1 INFO: task hung in fuse_flush 1 1 517d 517d 0/3 auto-obsoleted due to no activity on 2025/06/08 05:58
upstream INFO: task hung in fuse_flush (2) fuse 1 2 1284d 1292d 0/29 auto-obsoleted due to no activity on 2023/04/24 00:25
upstream INFO: task hung in fuse_flush (4) fuse 1 6 620d 767d 0/29 auto-obsoleted due to no activity on 2025/02/15 08:56
upstream INFO: task hung in fuse_flush fuse 1 2 1729d 1816d 0/29 auto-closed as invalid on 2022/02/03 03:15
linux-6.1 INFO: task hung in fuse_flush (2) 1 1 416d 416d 0/3 auto-obsoleted due to no activity on 2025/09/17 09:24
linux-4.19 INFO: task hung in fuse_flush (2) 1 1 1769d 1769d 0/1 auto-closed as invalid on 2022/01/24 04:40
linux-4.14 INFO: task hung in fuse_flush 1 syz, C inconclusive 19 1325d 1646d 0/1 upstream: reported C repro on 2022/01/26 21:17
linux-4.19 INFO: task hung in fuse_flush (3) 1 109 1283d 1645d 0/1 upstream: reported on 2022/01/27 11:57
upstream INFO: task hung in fuse_flush (3) fuse 1 1 1037d 1037d 0/29 auto-obsoleted due to no activity on 2023/12/26 21:09
linux-6.6 INFO: task hung in fuse_flush 1 1 170d 170d 0/2 auto-obsoleted due to no activity on 2026/05/21 19:59

Sample crash report:
INFO: task syz-executor.2:5274 blocked for more than 144 seconds.
      Not tainted 5.15.161-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D
 stack:27064 pid: 5274 ppid:  4199 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1f0 kernel/sched/core.c:6459
 rwsem_down_write_slowpath+0xf0c/0x16a0 kernel/locking/rwsem.c:1165
 inode_lock include/linux/fs.h:789 [inline]
 fuse_flush+0x217/0x800 fs/fuse/file.c:495
 filp_close+0xad/0x150 fs/open.c:1361
 __range_close fs/file.c:712 [inline]
 __close_range+0x15c/0x780 fs/file.c:779
 __do_sys_close_range fs/open.c:1406 [inline]
 __se_sys_close_range fs/open.c:1403 [inline]
 __x64_sys_close_range+0x76/0x80 fs/open.c:1403
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f2585af60a9
RSP: 002b:00007fff85badef8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007f2585c2e980 RCX: 00007f2585af60a9

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/22 23:08 linux-5.15.y 4878aadf2d15 edc5149a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in fuse_flush
* Struck through repros no longer work on HEAD.