diff options
| author | Kees Cook <keescook@chromium.org> | 2023-06-01 19:07:46 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-06-10 03:44:24 +0300 |
| commit | f26799ffd6c7871aa0a1b8eeff2bd28258368cdb (patch) | |
| tree | 6e93c42c4d12578cf24feb84c2071a212d741c25 /scripts | |
| parent | 16c6006af4d4e70ecef93977a5314409d931020b (diff) | |
| download | linux-f26799ffd6c7871aa0a1b8eeff2bd28258368cdb.tar.xz | |
checkpatch: check for 0-length and 1-element arrays
Fake flexible arrays have been deprecated since last millennium. Proper
C99 flexible arrays must be used throughout the kernel so
CONFIG_FORTIFY_SOURCE and CONFIG_UBSAN_BOUNDS can provide proper array
bounds checking.
[joe@perches.com: various suggestions]
Link: https://lkml.kernel.org/r/20230601160746.up.948-kees@kernel.org
Link: https://lore.kernel.org/r/20230517204530.never.151-kees@kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'scripts')
| -rwxr-xr-x | scripts/checkpatch.pl | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index b30114d637c4..158479496388 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -7418,6 +7418,16 @@ sub process { } } +# check for array definition/declarations that should use flexible arrays instead + if ($sline =~ /^[\+ ]\s*\}(?:\s*__packed)?\s*;\s*$/ && + $prevline =~ /^\+\s*(?:\}(?:\s*__packed\s*)?|$Type)\s*$Ident\s*\[\s*(0|1)\s*\]\s*;\s*$/) { + if (ERROR("FLEXIBLE_ARRAY", + "Use C99 flexible arrays - see https://docs.kernel.org/process/deprecated.html#zero-length-and-one-element-arrays\n" . $hereprev) && + $1 == '0' && $fix) { + $fixed[$fixlinenr - 1] =~ s/\[\s*0\s*\]/[]/; + } + } + # nested likely/unlikely calls if ($line =~ /\b(?:(?:un)?likely)\s*\(\s*!?\s*(IS_ERR(?:_OR_NULL|_VALUE)?|WARN)/) { WARN("LIKELY_MISUSE", |