tree af09c22cc7ee9adb1d3758c07cd2ceabcc50b781
parent 787381415cf967c5d6d1d7c5b5bd893376945edd
author stephen hemminger <stephen@networkplumber.org> 1375421527 -0700
committer David S. Miller <davem@davemloft.net> 1375480340 -0700

htb: fix sign extension bug

When userspace passes a large priority value
the assignment of the unsigned value hopt->prio
to  signed int cl->prio causes cl->prio to become negative and the
comparison is with TC_HTB_NUMPRIO is always false.

The result is that HTB crashes by referencing outside
the array when processing packets. With this patch the large value
wraps around like other values outside the normal range.

See: https://bugzilla.kernel.org/show_bug.cgi?id=60669

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>