linux-kernel - selftests/filesystem: clang warning null passed to a callee that requires a non-null argument [-Wnonnull]

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Message-ID: <CA+G9fYt-CMBGCFxV5ziP98upkeK2LBxkZRo7-0XN1G+zLtWK4A@mail.gmail.com>
Date: Thu, 5 Jun 2025 17:41:01 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: clang-built-linux <llvm@...ts.linux.dev>, 
	"open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@...r.kernel.org>, open list <linux-kernel@...r.kernel.org>, 
	lkft-triage@...ts.linaro.org
Cc: Nathan Chancellor <nathan@...nel.org>, Anders Roxell <anders.roxell@...aro.org>, 
	Dan Carpenter <dan.carpenter@...aro.org>, Arnd Bergmann <arnd@...db.de>, 
	Sasha Levin <sashal@...nel.org>
Subject: selftests/filesystem: clang warning null passed to a callee that
 requires a non-null argument [-Wnonnull]

Regressions found on arm, arm64 and x86_64 building warnings with clang-20
and clang-nightly started from Linux next-20250603

Regressions found on arm, arm64 and x86_64
 - selftests/filesystem

Regression Analysis:
 - New regression? Yes
 - Reproducible? Yes

First seen on the next-20250603
Good: next-20250530
Bad:  next-20250603

Test regression: arm arm64 x86_64 clang warning null passed to a
callee that requires a non-null argument [-Wnonnull]

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

## Build warnings
make[4]: Entering directory '/builds/linux/tools/testing/selftests/filesystems'
  CC       devpts_pts
  CC       file_stressor
  CC       anon_inode_test
anon_inode_test.c:45:37: warning: null passed to a callee that
requires a non-null argument [-Wnonnull]
   45 |         ASSERT_LT(execveat(fd_context, "", NULL, NULL,
AT_EMPTY_PATH), 0);
      |                                            ^~~~

## Source
* Kernel version: 6.15.0-next-20250605
* Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git
* Git sha: a0bea9e39035edc56a994630e6048c8a191a99d8
* Toolchain: Debian clang version 21.0.0
(++20250529012636+c474f8f2404d-1~exp1~20250529132821.1479)

## Build
* Test log: https://qa-reports.linaro.org/api/testruns/28651387/log_file/
* Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/2xzM4wMl8SvuLKE3mw3csiuv3Jz/
* Kernel config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2xzM4wMl8SvuLKE3mw3csiuv3Jz/config

--
Linaro LKFT
https://lkft.linaro.org