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| author |   Javier Pello <devel@otheo.eu> | 2022-09-05 20:09:01 +0200 |
|---|---|---|
| committer |   Andreas K. Hüttel <dilfridge@gentoo.org> | 2022-10-01 22:17:57 +0200 |
| commit | fca9fff98245306796a33c05244768f891de34d8 (patch) | |
| tree | 6955514a5adf1545c4be178dfa65013f88798169 | |
| parent | Use __ehdr_start rather than _begin in _dl_start_final (diff) | |
| download | glibc-fca9fff98245306796a33c05244768f891de34d8.tar.gz glibc-fca9fff98245306796a33c05244768f891de34d8.tar.bz2 glibc-fca9fff98245306796a33c05244768f891de34d8.zip | |
elf: Fix hwcaps string size overestimation
Commit dad90d528259b669342757c37dedefa8577e2636 added glibc-hwcaps
support for LD_LIBRARY_PATH and, for this, it adjusted the total
string size required in _dl_important_hwcaps. However, in doing so
it inadvertently altered the calculation of the size required for
the power set strings, as the computation of the power set string
size depended on the first value assigned to the total variable,
which is later shifted, resulting in overallocation of string
space. Fix this now by using a different variable to hold the
string size required for glibc-hwcaps.
Signed-off-by: Javier Pello <devel@otheo.eu>
(cherry picked from commit a23820f6052a740246fdc7dcd9c43ce8eed0c45a)
(cherry picked from commit f4687bb41689ffcebc8744bed754a960045de733)
| -rw-r--r-- | elf/dl-hwcaps.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/elf/dl-hwcaps.c b/elf/dl-hwcaps.c index 6f161f6ad5..92eb53790e 100644 --- a/elf/dl-hwcaps.c +++ b/elf/dl-hwcaps.c @@ -193,7 +193,7 @@ _dl_important_hwcaps (const char *glibc_hwcaps_prepend, /* Each hwcaps subdirectory has a GLIBC_HWCAPS_PREFIX string prefix and a "/" suffix once stored in the result. */ hwcaps_counts.maximum_length += strlen (GLIBC_HWCAPS_PREFIX) + 1; - size_t total = (hwcaps_counts.count * (strlen (GLIBC_HWCAPS_PREFIX) + 1) + size_t hwcaps_sz = (hwcaps_counts.count * (strlen (GLIBC_HWCAPS_PREFIX) + 1) + hwcaps_counts.total_length); /* Count the number of bits set in the masked value. */ @@ -229,11 +229,12 @@ _dl_important_hwcaps (const char *glibc_hwcaps_prepend, assert (m == cnt); /* Determine the total size of all strings together. */ + size_t total; if (cnt == 1) - total += temp[0].len + 1; + total = temp[0].len + 1; else { - total += temp[0].len + temp[cnt - 1].len + 2; + total = temp[0].len + temp[cnt - 1].len + 2; if (cnt > 2) { total <<= 1; @@ -255,6 +256,7 @@ _dl_important_hwcaps (const char *glibc_hwcaps_prepend, /* This is the overall result, including both glibc-hwcaps subdirectories and the legacy hwcaps subdirectories using the power set construction. */ + total += hwcaps_sz; struct r_strlenpair *overall_result = malloc (*sz * sizeof (*result) + total); if (overall_result == NULL) |