Re: [PATCH V4 for-6.10/block] loop: Fix a race between loop detach and loop open

[kernel test robot <oliver.sang@intel.com>]

Hello,

kernel test robot noticed "ltp.ioctl09.fail" on:

commit: 02ab74c165fb204557fe6cde80eda0633fbc4412 ("[PATCH V4 for-6.10/block] loop: Fix a race between loop detach and loop open")
url: https://github.com/intel-lab-lkp/linux/commits/Gulam-Mohamed/loop-Fix-a-race-between-loop-detach-and-loop-open/20240608-031123
base: https://git.kernel.org/cgit/linux/kernel/git/axboe/linux-block.git for-next
patch link: https://lore.kernel.org/all/20240607190607.17705-1-gulam.mohamed@oracle.com/
patch subject: [PATCH V4 for-6.10/block] loop: Fix a race between loop detach and loop open

in testcase: ltp
version: ltp-x86_64-14c1f76-1_20240608
with following parameters:

	disk: 1HDD
	fs: ext4
	test: syscalls-03/ioctl09



compiler: gcc-13
test machine: 4 threads 1 sockets Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz (Ivy Bridge) with 8G memory

(please refer to attached dmesg/kmsg for entire log/backtrace)




If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202406112130.a572f72-oliver.sang@intel.com


Running tests.......
<<<test_start>>>
tag=ioctl09 stime=1717978971
cmdline="ioctl09"
contacts=""
analysis=exit
<<<test_output>>>
tst_test.c:1734: TINFO: LTP version: 20240524-32-ge2c52c5bb
tst_test.c:1618: TINFO: Timeout per run is 0h 02m 30s
tst_device.c:96: TINFO: Found free device 0 '/dev/loop0'
ioctl09.c:48: TPASS: access /sys/block/loop0/loop0p1 succeeds
ioctl09.c:56: TPASS: access /dev/loop0p1 succeeds
ioctl09.c:51: TPASS: access /sys/block/loop0/loop0p2 fails
ioctl09.c:59: TPASS: access /dev/loop0p2 fails
ioctl09.c:48: TPASS: access /sys/block/loop0/loop0p1 succeeds
ioctl09.c:56: TPASS: access /dev/loop0p1 succeeds
ioctl09.c:48: TPASS: access /sys/block/loop0/loop0p2 succeeds
ioctl09.c:56: TPASS: access /dev/loop0p2 succeeds
tst_device.c:263: TWARN: ioctl(/dev/loop0, LOOP_CLR_FD, 0) no ENXIO for too long

Summary:
passed   8
failed   0
broken   0
skipped  0
warnings 1
incrementing stop
<<<execution_status>>>
initiation_status="ok"
duration=3 termination_type=exited termination_id=4 corefile=no
cutime=3 cstime=42
<<<test_end>>>
INFO: ltp-pan reported some tests FAIL
LTP Version: 20240524-32-ge2c52c5bb

       ###############################################################

            Done executing testcases.
            LTP Version:  20240524-32-ge2c52c5bb
       ###############################################################




The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240611/202406112130.a572f72-oliver.sang@intel.com



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https://github.com/intel/lkp-tests/wiki