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From c74301ce5020c499445eb5c32bd70e4a1099a62d Mon Sep 17 00:00:00 2001
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From: wuguanghao <wuguanghao3@huawei.com>
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Date: Wed, 30 Jun 2021 16:27:18 +0800
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Subject: [PATCH 29/46] append_pathname: check the value returned by realloc
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Content-Type: text/plain
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In append_pathname(), we need to add a new path to save the value
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returned by realloc, otherwise the name->path may be NULL, causing
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a segfault.
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Signed-off-by: Wu Guanghao <wuguanghao3@huawei.com>
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Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
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Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Signed-off-by: Lukas Czerner <lczerner@redhat.com>
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---
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contrib/fsstress.c | 9 ++++++++-
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1 file changed, 8 insertions(+), 1 deletion(-)
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diff --git a/contrib/fsstress.c b/contrib/fsstress.c
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index 2a983482..2136a903 100644
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--- a/contrib/fsstress.c
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+++ b/contrib/fsstress.c
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@@ -599,6 +599,7 @@ void add_to_flist(int ft, int id, int parent)
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void append_pathname(pathname_t * name, char *str)
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{
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int len;
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+ char *path;
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len = strlen(str);
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#ifdef DEBUG
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@@ -609,7 +610,13 @@ void append_pathname(pathname_t * name, char *str)
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}
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#endif
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- name->path = realloc(name->path, name->len + 1 + len);
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+ path = realloc(name->path, name->len + 1 + len);
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+ if (path == NULL) {
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+ fprintf(stderr, "fsstress: append_pathname realloc failed\n");
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+ chdir(homedir);
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+ abort();
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+ }
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+ name->path = path;
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strcpy(&name->path[name->len], str);
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name->len += len;
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}
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--
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2.35.1
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