From af03924f5b43b325a436d07ee1222f42e3aa96b6 Mon Sep 17 00:00:00 2001 From: wuguanghao Date: Wed, 30 Jun 2021 16:27:18 +0800 Subject: [PATCH] append_pathname: check the value returned by realloc 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 Signed-off-by: Zhiqiang Liu Signed-off-by: Theodore Ts'o --- contrib/fsstress.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/contrib/fsstress.c b/contrib/fsstress.c index 2a98348..2136a90 100644 --- a/contrib/fsstress.c +++ b/contrib/fsstress.c @@ -599,6 +599,7 @@ void add_to_flist(int ft, int id, int parent) void append_pathname(pathname_t * name, char *str) { int len; + char *path; len = strlen(str); #ifdef DEBUG @@ -609,7 +610,13 @@ void append_pathname(pathname_t * name, char *str) } #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); name->len += len; } -- 1.8.3.1