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* [glibc/release/2.34/master] io: Fix use-after-free in ftw [BZ #26779]
@ 2022-11-11 16:29 Florian Weimer
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From: Florian Weimer @ 2022-11-11 16:29 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=deea6ab1bcb2696be514e579f3263c234ecc1683
commit deea6ab1bcb2696be514e579f3263c234ecc1683
Author: Martin Sebor <msebor@redhat.com>
Date: Tue Jan 25 17:39:02 2022 -0700
io: Fix use-after-free in ftw [BZ #26779]
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
(cherry picked from commit ee52ab25ba875f458981fce22c54e3c04c7a17d3)
Diff:
---
io/ftw.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/io/ftw.c b/io/ftw.c
index cf08d9f101..91a4e8e6de 100644
--- a/io/ftw.c
+++ b/io/ftw.c
@@ -324,8 +324,9 @@ open_dir_stream (int *dfdp, struct ftw_data *data, struct dir_data *dirp)
buf[actsize++] = '\0';
/* Shrink the buffer to what we actually need. */
- data->dirstreams[data->actdir]->content = realloc (buf, actsize);
- if (data->dirstreams[data->actdir]->content == NULL)
+ void *content = realloc (buf, actsize);
+ data->dirstreams[data->actdir]->content = content;
+ if (content == NULL)
{
int save_err = errno;
free (buf);
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2022-11-11 16:29 [glibc/release/2.34/master] io: Fix use-after-free in ftw [BZ #26779] Florian Weimer
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