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VFS: Busy inodes after unmount (use-after-free)

Status: auto-obsoleted due to no activity on 2023/06/25 23:02
Reported-by: syzbot+ded3c39db7eda48031d9@syzkaller.appspotmail.com
First crash: 851d, last: 851d
Cause bisection: introduced by (bisect log) :
commit 3e45af8a72c01c7e00c26e9df6089f7412ab3ec2
Author: Tadeusz Struk <tadeusz.struk@linaro.org>
Date: Wed Mar 9 01:20:15 2022 +0000

  ANDROID: incremental-fs: limit mount stack depth

Crash: VFS: Busy inodes after unmount (use-after-free) (log)
Repro: C syz .config
  
Fix bisection the fix commit could be any of (bisect log):
  416c4356f372 Merge 5.10.161 into android12-5.10-lts
  90eb02302b5e Revert "HID: core: Provide new max_buffer_size attribute to over-ride the default"
   
▶ ▼ Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-54 VFS: Busy inodes after unmount (use-after-free) C 4 796d 851d 0/2 auto-obsoleted due to no activity on 2023/08/20 15:35
upstream VFS: Busy inodes after unmount (use-after-free) (2) btrfs C error 175 12h17m 46d 0/29 upstream: reported C repro on 2025/05/11 08:46
linux-6.1 VFS: Busy inodes after unmount (use-after-free) origin:lts-only C inconclusive 1649 13h32m 831d 0/3 upstream: reported C repro on 2023/03/18 09:53
android-5-15 VFS: Busy inodes after unmount (use-after-free) origin:downstream C error done 2 749d 851d 0/2 auto-obsoleted due to no activity on 2023/09/15 20:27
upstream VFS: Busy inodes after unmount (use-after-free) bcachefs C error 55684 51d 883d 28/29 fixed on 2025/05/06 15:33
linux-5.15 VFS: Busy inodes after unmount (use-after-free) missing-backport origin:upstream C unreliable 2328 1d01h 830d 0/3 upstream: reported C repro on 2023/03/19 11:46

Sample crash report:
VFS: Busy inodes after unmount of ramfs. Self-destruct in 5 seconds.  Have a nice day...

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/02/25 23:02 android12-5.10-lts 416c4356f372 ee50e71c .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 VFS: Busy inodes after unmount (use-after-free)
* Struck through repros no longer work on HEAD.