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@xxxxxxxxx> Signed-off-by: Jules Maselbas <jmaselbas@xxxxxxxxx> --- 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@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
