On 2016/08/04 6:48, Nicholas Krause wrote: > This fixes a kmemleak leak warning complaining about working on > unitializied memory as found in the function, getname_flages. Seems > that we are indeed working on unitialized memory, as the filename > char pointer is never made to point to the filname structure's result > member for holding it's name, fix this by using memcpy to copy the > filname structure pointer's, name to the char pointer passed to this > function. > > Signed-off-by: Nicholas Krause <xerofoify@xxxxxxxxx> > --- > fs/namei.c | 1 + > mm/early_ioremap.c | 1 + > 2 files changed, 2 insertions(+) > > diff --git a/fs/namei.c b/fs/namei.c > index c386a32..6b18d57 100644 > --- a/fs/namei.c > +++ b/fs/namei.c > @@ -196,6 +196,7 @@ getname_flags(const char __user *filename, int flags, int *empty) > } > } > > + memcpy((char *)result->name, filename, len); This filename is a __user pointer. Reading with memcpy() is not safe. > result->uptr = filename; > result->aname = NULL; > audit_getname(result); -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
