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| author | Wilco Dijkstra <wilco.dijkstra@arm.com> | 2022-06-10 17:13:29 +0100 |
|---|---|---|
| committer | Wilco Dijkstra <wdijkstr@arm.com> | 2022-06-10 17:13:29 +0100 |
| commit | fdaf78656fb6cc7caeb7b4e37068e8a8bf4dc639 (patch) | |
| tree | 05302f7351e2b505af1d50d165bbbe371123d15d /sysdeps/s390 | |
| parent | f107b7b30d815f191181617e2c14f21e6af4ddcf (diff) | |
| download | glibc-fdaf78656fb6cc7caeb7b4e37068e8a8bf4dc639.tar glibc-fdaf78656fb6cc7caeb7b4e37068e8a8bf4dc639.tar.gz glibc-fdaf78656fb6cc7caeb7b4e37068e8a8bf4dc639.tar.bz2 glibc-fdaf78656fb6cc7caeb7b4e37068e8a8bf4dc639.zip | |
Add bounds check to __libc_ifunc_impl_list
Add a proper bounds check to __libc_ifunc_impl_list. This makes MAX_IFUNC
redundant and fixes several targets that will write outside the array.
To avoid unnecessary large diffs, pass the maximum in the argument 'i' to
IFUNC_IMPL_ADD - 'max' can be used in new ifunc definitions and existing
ones can be updated if desired.
Passes buildmanyglibc.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/s390')
| -rw-r--r-- | sysdeps/s390/multiarch/ifunc-impl-list.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c index c1902b2c26..5d0c73094d 100644 --- a/sysdeps/s390/multiarch/ifunc-impl-list.c +++ b/sysdeps/s390/multiarch/ifunc-impl-list.c @@ -66,9 +66,6 @@ #include <ifunc-wmemset.h> #include <ifunc-wmemcmp.h> -/* Maximum number of IFUNC implementations. */ -#define MAX_IFUNC 3 - /* Fill ARRAY of MAX elements with IFUNC implementations for function NAME supported on target machine and return the number of valid entries. */ @@ -76,9 +73,7 @@ size_t __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, size_t max) { - assert (max >= MAX_IFUNC); - - size_t i = 0; + size_t i = max; /* Get hardware information. */ unsigned long int dl_hwcap = GLRO (dl_hwcap); @@ -670,5 +665,5 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, ) #endif /* HAVE_WMEMCMP_IFUNC */ - return i; + return 0; } |