diff options
| author | Tom de Vries <tdevries@suse.de> | 2018-11-27 08:26:04 +0000 |
|---|---|---|
| committer | Tom de Vries <vries@gcc.gnu.org> | 2018-11-27 08:26:04 +0000 |
| commit | 6d760a0197ece131619ac88f0fe34ce452fd774c (patch) | |
| tree | 766ea0b74a27945cf9a88eabcf6775774905a7d5 /libbacktrace/mmap.c | |
| parent | 0c155f24a945a55c37a963f64e89870f60543e64 (diff) | |
[libbacktrace] Don't point to released memory in backtrace_vector_release
When backtrace_vector_release is called with vec.size == 0, it releases the
memory pointed at by vec.base.
Set vec.base set to NULL if vec.size == 0 to ensure we don't point to released
memory.
Bootstrapped and reg-tested on x86_64.
2018-11-27 Tom de Vries <tdevries@suse.de>
* mmap.c (backtrace_vector_release): Same.
* unittest.c (test1): Add check.
From-SVN: r266505
Diffstat (limited to 'libbacktrace/mmap.c')
| -rw-r--r-- | libbacktrace/mmap.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libbacktrace/mmap.c b/libbacktrace/mmap.c index 32fcba62399..9f896a1bb99 100644 --- a/libbacktrace/mmap.c +++ b/libbacktrace/mmap.c @@ -321,5 +321,7 @@ backtrace_vector_release (struct backtrace_state *state, backtrace_free (state, (char *) vec->base + aligned, alc, error_callback, data); vec->alc = 0; + if (vec->size == 0) + vec->base = NULL; return 1; } |