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| author | Dimitry Andric <dim@FreeBSD.org> | 2021-02-22 20:01:09 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2021-02-22 20:01:09 +0000 |
| commit | d149877758f162f0c777e7760164bf2c1f7a1bc1 (patch) | |
| tree | b68572591265f8113d3865d8ed4bdd8513a7edbd | |
| parent | a805ffbcbce85872e71d825fd405a4a30e2ab4bc (diff) | |
| download | src-d149877758f162f0c777e7760164bf2c1f7a1bc1.tar.gz src-d149877758f162f0c777e7760164bf2c1f7a1bc1.zip | |
Fix possibly unitialized variables in __cxa_demangle_gnu3()
After 0ee0dbfb0d26cf4bc37f24f12e76c7f532b0f368 where I imported a more
recent libcxxrt snapshot, the variables 'rtn' and 'has_ret' could in
some cases be used while still uninitialized. Most obviously this would
lead to a jemalloc complaint about a bad free(), aborting the program.
Fix this by initializing a bunch variables in their declarations. This
change has also been sent upstream, with some additional changes to be
used in their testing framework.
PR: 253226
MFC after: 3 days
| -rw-r--r-- | contrib/libcxxrt/libelftc_dem_gnu3.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/contrib/libcxxrt/libelftc_dem_gnu3.c b/contrib/libcxxrt/libelftc_dem_gnu3.c index 6e88f7b4bb4c..93e1c41fa034 100644 --- a/contrib/libcxxrt/libelftc_dem_gnu3.c +++ b/contrib/libcxxrt/libelftc_dem_gnu3.c @@ -538,8 +538,8 @@ __cxa_demangle_gnu3(const char *org) struct type_delimit td; ssize_t org_len; unsigned int limit; - char *rtn; - bool has_ret, more_type; + char *rtn = NULL; + bool has_ret = false, more_type = false; if (org == NULL) return (NULL); @@ -562,13 +562,9 @@ __cxa_demangle_gnu3(const char *org) return (rtn); } - if (!cpp_demangle_data_init(&ddata, org + 2)) return (NULL); - rtn = NULL; - has_ret = more_type = false; - if (!cpp_demangle_read_encoding(&ddata)) goto clean; |