diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2023-09-30 19:52:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-02-23 11:12:38 +0300 |
| commit | 999ecc936a99cdd3392a652fa3686e74bae5d671 (patch) | |
| tree | 6137579be51b47088a7c6bc88c4a0f12894063b0 /scripts/mod | |
| parent | a5767decf74343fd4808b751c100161e2b489ffe (diff) | |
| download | linux-999ecc936a99cdd3392a652fa3686e74bae5d671.tar.xz | |
modpost: Don't let "driver"s reference .exit.*
commit f177cd0c15fcc7bdbb68d8d1a3166dead95314c8 upstream.
Drivers must not reference functions marked with __exit as these likely
are not available when the code is built-in.
There are few creative offenders uncovered for example in ARCH=amd64
allmodconfig builds. So only trigger the section mismatch warning for
W=1 builds.
The dual rule that drivers must not reference .init.* is implemented
since commit 0db252452378 ("modpost: don't allow *driver to reference
.init.*") which however missed that .exit.* should be handled in the
same way.
Thanks to Masahiro Yamada and Arnd Bergmann who gave valuable hints to
find this improvement.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Stable-dep-of: 846cfbeed09b ("um: Fix adding '-no-pie' for clang")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts/mod')
| -rw-r--r-- | scripts/mod/modpost.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 9ef2f6423e80..9a4a220ecbc2 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -1087,9 +1087,20 @@ static int secref_whitelist(const struct sectioncheck *mismatch, "*_console"))) return 0; - /* symbols in data sections that may refer to meminit/exit sections */ + /* symbols in data sections that may refer to meminit sections */ if (match(fromsec, PATTERNS(DATA_SECTIONS)) && - match(tosec, PATTERNS(ALL_XXXINIT_SECTIONS, ALL_EXIT_SECTIONS)) && + match(tosec, PATTERNS(ALL_XXXINIT_SECTIONS, ALL_XXXEXIT_SECTIONS)) && + match(fromsym, PATTERNS("*driver"))) + return 0; + + /* + * symbols in data sections must not refer to .exit.*, but there are + * quite a few offenders, so hide these unless for W=1 builds until + * these are fixed. + */ + if (!extra_warn && + match(fromsec, PATTERNS(DATA_SECTIONS)) && + match(tosec, PATTERNS(EXIT_SECTIONS)) && match(fromsym, PATTERNS("*driver"))) return 0; |