forked from pool/rsync
3c6d9062b8
- Add missing runtime dependency to libxxhash when rsync builds against it. (bsc#1214515) - Rename patch to follow naming patch policies: fortified-strlcpy-fix.patch -> rsync-fortified-strlcpy-fix.patch - add fortified-strlcpy-fix.patch (bsc#1214616, bsc#1214249) OBS-URL: https://build.opensuse.org/request/show/1109245 OBS-URL: https://build.opensuse.org/package/show/network/rsync?expand=0&rev=110
49 lines
1.6 KiB
Diff
49 lines
1.6 KiB
Diff
From 1f83963f59960150e8c46112daa8411324c1f209 Mon Sep 17 00:00:00 2001
|
|
From: Jiri Slaby <jslaby@suse.cz>
|
|
Date: Fri, 18 Aug 2023 08:26:20 +0200
|
|
Subject: [PATCH] exclude: fix crashes with fortified strlcpy()
|
|
|
|
Fortified (-D_FORTIFY_SOURCE=2 for gcc) builds make strlcpy() crash when
|
|
its third parameter (size) is larger than the buffer:
|
|
$ rsync -FFXHav '--filter=merge global-rsync-filter' Align-37-43/ xxx
|
|
sending incremental file list
|
|
*** buffer overflow detected ***: terminated
|
|
|
|
It's in the exclude code in setup_merge_file():
|
|
strlcpy(y, save, MAXPATHLEN);
|
|
|
|
Note the 'y' pointer was incremented, so it no longer points to memory
|
|
with MAXPATHLEN "owned" bytes.
|
|
|
|
Fix it by remembering the number of copied bytes into the 'save' buffer
|
|
and use that instead of MAXPATHLEN which is clearly incorrect.
|
|
|
|
Fixes #511.
|
|
---
|
|
exclude.c | 5 +++--
|
|
1 file changed, 3 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/exclude.c b/exclude.c
|
|
index ffe55b167..1a5de3b9e 100644
|
|
--- a/exclude.c
|
|
+++ b/exclude.c
|
|
@@ -720,7 +720,8 @@ static BOOL setup_merge_file(int mergelist_num, filter_rule *ex,
|
|
parent_dirscan = True;
|
|
while (*y) {
|
|
char save[MAXPATHLEN];
|
|
- strlcpy(save, y, MAXPATHLEN);
|
|
+ /* copylen is strlen(y) which is < MAXPATHLEN. +1 for \0 */
|
|
+ size_t copylen = strlcpy(save, y, MAXPATHLEN) + 1;
|
|
*y = '\0';
|
|
dirbuf_len = y - dirbuf;
|
|
strlcpy(x, ex->pattern, MAXPATHLEN - (x - buf));
|
|
@@ -734,7 +735,7 @@ static BOOL setup_merge_file(int mergelist_num, filter_rule *ex,
|
|
lp->head = NULL;
|
|
}
|
|
lp->tail = NULL;
|
|
- strlcpy(y, save, MAXPATHLEN);
|
|
+ strlcpy(y, save, copylen);
|
|
while ((*x++ = *y++) != '/') {}
|
|
}
|
|
parent_dirscan = False;
|