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dmsetup: no memleak on failed realocation

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clang: keep old buf pointer for release on failing realloc() codepath.
This commit is contained in:
Zdenek Kabelac 2020-01-29 16:30:16 +01:00
parent 62ad12d0d0
commit ac38b576f9
1 changed files with 4 additions and 2 deletions
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6
libdm/dm-tools/dmsetup.c
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@ -1216,7 +1216,7 @@ out:
static char *_slurp_stdin(void)
{
char *buf, *pos;
char *newbuf, *buf, *pos;
size_t bufsize = DEFAULT_BUF_SIZE;
size_t total = 0;
ssize_t n = 0;
@ -1245,10 +1245,12 @@ static char *_slurp_stdin(void)
pos += n;
if (total == bufsize - 1) {
bufsize *= 2;
if (!(buf = realloc(buf, bufsize))) {
if (!(newbuf = realloc(buf, bufsize))) {
log_error("Buffer memory extension to %" PRIsize_t " bytes failed.", bufsize);
free(buf);
return NULL;
}
buf = newbuf;
}
} while (1);