tree 21ff69bd26c9fadb4196af74822e868beedd48a9
parent af494fd94baf91d4f5e0803161d9d837f629dd51
author Kees Cook <keescook@chromium.org> 1597360642 -0700
committer Greg Kroah-Hartman <gregkh@google.com> 1597389195 +0200

FROMLIST: exec: Restore EACCES of S_ISDIR execve()

The return code for attempting to execute a directory has always been
EACCES. Adjust the S_ISDIR exec test to reflect the old errno instead
of the general EISDIR for other kinds of "open" attempts on directories.

Link: https://lore.kernel.org/lkml/20200813151305.6191993b@why
Link: https://lore.kernel.org/r/20200813231723.2725102-2-keescook@chromium.org
Fixes: 633fb6ac3980 ("exec: move S_ISREG() check earlier")
Reported-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Idb68cdfc90be5928691ac68dda8c98726af20c9e