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append_pathname: check the value returned by realloc

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In append_pathname(), we need to add a new path to save the value
returned by realloc, otherwise the name->path may be NULL, causing
a segfault.

Signed-off-by: Wu Guanghao <wuguanghao3@huawei.com>
Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
wuguanghao 2021-06-30 16:27:18 +08:00 committed by Theodore Ts'o
parent c3215a5324
commit af03924f5b
1 changed files with 8 additions and 1 deletions
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9
contrib/fsstress.c
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@ -599,6 +599,7 @@ void add_to_flist(int ft, int id, int parent)
void append_pathname(pathname_t * name, char *str) void append_pathname(pathname_t * name, char *str)
{ {
int len; int len;
char *path;
len = strlen(str); len = strlen(str);
#ifdef DEBUG #ifdef DEBUG
@ -609,7 +610,13 @@ void append_pathname(pathname_t * name, char *str)
} }
#endif #endif
name->path = realloc(name->path, name->len + 1 + len); path = realloc(name->path, name->len + 1 + len);
if (path == NULL) {
fprintf(stderr, "fsstress: append_pathname realloc failed\n");
chdir(homedir);
abort();
}
name->path = path;
strcpy(&name->path[name->len], str); strcpy(&name->path[name->len], str);
name->len += len; name->len += len;
} }