lzo: fix overflow checking in copy_backptr()
The check `src > dst' in the form `&c->out[-back] > c->out' invokes pointer overflow, which is undefined behavior in C. Remove the check. Also replace `&c->out[-back] < c->out_start' with a safe form `c->out - c->out_start < back' to avoid overflow. CC: libav-stable@libav.org Signed-off-by: Xi Wang <xi.wang@gmail.com> Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Showing
Please
register
or
sign in
to comment