diff options
| author | Nogah Frankel <nogahf@mellanox.com> | 2017-12-04 13:31:11 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-25 11:05:48 +0100 |
| commit | a0514c0ba76a5a941ed3b8efa7a952273c1ca421 (patch) | |
| tree | 93cad8c05c587fca9fe4e94aedbef0bebe0428f0 /include/net | |
| parent | 1c03903e973c276f9e75d6f7f3727b51b97c803b (diff) | |
net_sched: red: Avoid illegal values
[ Upstream commit 8afa10cbe281b10371fee5a87ab266e48d71a7f9 ]
Check the qmin & qmax values doesn't overflow for the given Wlog value.
Check that qmin <= qmax.
Fixes: a783474591f2 ("[PKT_SCHED]: Generic RED layer")
Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/red.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/net/red.h b/include/net/red.h index ba5039418a93..3618cdfec884 100644 --- a/include/net/red.h +++ b/include/net/red.h @@ -167,6 +167,17 @@ static inline void red_set_vars(struct red_vars *v) v->qcount = -1; } +static inline bool red_check_params(u32 qth_min, u32 qth_max, u8 Wlog) +{ + if (fls(qth_min) + Wlog > 32) + return false; + if (fls(qth_max) + Wlog > 32) + return false; + if (qth_max < qth_min) + return false; + return true; +} + static inline void red_set_parms(struct red_parms *p, u32 qth_min, u32 qth_max, u8 Wlog, u8 Plog, u8 Scell_log, u8 *stab, u32 max_P) |