On Tue 16-09-25 13:04:42, Jan Kara wrote:

On Tue 16-09-25 12:57:26, Naresh Kamboju wrote:

quoted

The following LTP chdir01 df01_sh and stat04 tests failed on the rock-pi-4b
qemu-arm64 on the Linux next-20250915 tag build.

First seen on next-20250915
Good: next-20250912
Bad: next-20250915

Regression Analysis:
- New regression? yes
- Reproducibility? yes

* rk3399-rock-pi-4b, ltp-smoke
* qemu-arm64, ltp-smoke
* qemu-arm64-compat, ltp-smoke
 - chdir01
  - df01_sh
  - stat04

Test regression: next-20250915: LTP chdir01 df01_sh stat04
tst_device.c:97: TBROK: Could not stat loop device 0

This is really strange. Those failing tests all start to complain that
/dev/loop0 doesn't exist (open gets ENOENT)... The fact that this is
limited to only a few archs suggests it's some race somewhere but I don't
see any relevant changes in linux-block in last three days...

Ha, Mark Brown tracked this [1] to changes in VFS tree in
extensible_ioctl_valid(). More discussion there I guess.

[1] https://lore.kernel.org/all/02da33e3-6583-4344-892f-a9784b9c5b1b@sirena.org.uk (local)

								Honza

-- 
Jan Kara [off-list ref]
SUSE Labs, CR