mail archive of the barebox mailing list
 help / color / mirror / Atom feed
* [PATCH] fs: Fix link_path_walk to return -ENOENT on empty path
@ 2021-04-17 23:34 Jules Maselbas
  2021-05-03 12:45 ` Sascha Hauer
  0 siblings, 1 reply; 2+ messages in thread
From: Jules Maselbas @ 2021-04-17 23:34 UTC (permalink / raw)
  To: barebox; +Cc: Neeraj Pal, Jules Maselbas

link_path_walk was returning 0 when passed with an empty path,
this lead calling code to assume that the struct nameidata nd
is valid and thus has a `last` field populated, which is not.
In the end causing a runtime crash.

This issue can easily be reproduced by running the command:
cat ""

Reported-by: Neeraj Pal <neerajpal09@gmail.com>
Signed-off-by: Jules Maselbas <jmaselbas@kalray.eu>
---
 fs/fs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/fs.c b/fs/fs.c
index a02332491..6de5a3b59 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -1928,6 +1928,8 @@ static int link_path_walk(const char *name, struct nameidata *nd)
 	int err;
 	char separator = '/';
 
+	if (!*name)
+		return -ENOENT;
 	while (*name=='/')
 		name++;
 	if (!*name)
-- 
2.17.1



_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox


^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, other threads:[~2021-05-03 12:47 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-04-17 23:34 [PATCH] fs: Fix link_path_walk to return -ENOENT on empty path Jules Maselbas
2021-05-03 12:45 ` Sascha Hauer

mail archive of the barebox mailing list

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://lore.barebox.org/barebox/0 barebox/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 barebox barebox/ https://lore.barebox.org/barebox \
		barebox@lists.infradead.org barebox@lists.infradead.org
	public-inbox-index barebox

Example config snippet for mirrors.


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git