The following LTP syscalls acct01 test failed on qemu-arm64, qemu-x86_64, x86-64 and rock-pi-4b running the Linux next-20250911 tag kernel.

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

Test regression: next-20250911 acct01.c 123 TFAIL acct(.) expected EISDIR EACCES (13)

Reported-by: Linux Kernel Functional Testing lkft@linaro.org

Initial investigation pointing to this commit id, (Need to bisect) $ git log --oneline next-20250910..next-20250911 -- kernel/acct.c ccc54b556054d kernel/acct.c: saner struct file treatment

## Test log tst_test.c:1953: TINFO: LTP version: 20250530 tst_test.c:1956: TINFO: Tested kernel: 6.17.0-rc5-next-20250911 #1 SMP PREEMPT @1757575072 aarch64 tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz' tst_kconfig.c:676: TINFO: CONFIG_TRACE_IRQFLAGS kernel option detected which might slow the execution tst_test.c:1774: TINFO: Overall timeout per run is 0h 21m 36s acct01.c:123: TFAIL: acct(.) expected EISDIR: EACCES (13) acct01.c:123: TPASS: acct(/dev/null) : EACCES (13) acct01.c:123: TPASS: acct(/tmp/does/not/exist) : ENOENT (2) acct01.c:123: TPASS: acct(./tmpfile/) : ENOTDIR (20) acct01.c:123: TPASS: acct(./tmpfile) : EPERM (1) acct01.c:123: TPASS: acct(NULL) : EPERM (1) acct01.c:123: TPASS: acct(test_file_eloop1) : ELOOP (40) acct01.c:123: TPASS: acct(aaaa...) : ENAMETOOLONG (36) acct01.c:123: TPASS: acct(ro_mntpoint/file) : EROFS (30) acct01.c:123: TPASS: acct(Invalid address) : EFAULT (14) Summary: passed 9 failed 1

## Source * Kernel version: 6.17.0-rc5 * Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git * Git describe: 6.17.0-rc5-next-20250911 * Git commit: 8f21d9da46702c4d6951ba60ca8a05f42870fe8f * Architectures: qemu-arm64, qemu-x86_64, x86_64 and rock-pi-4b * Toolchains: gcc-13 * Kconfigs: defconfig+lkftconfigs

## Build * Test log: https://qa-reports.linaro.org/api/testruns/29854528/log_file/ * Test details: https://regressions.linaro.org/lkft/linux-next-master/next-20250911/ltp-sysc... * Test plan: https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/32XlIYnaqlB... * Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/32XlFRJ0UBKszjvazzyFA... * Kernel config: https://storage.tuxsuite.com/public/linaro/lkft/builds/32XlFRJ0UBKszjvazzyFA...

-- Linaro LKFT