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| author |   Nogah Frankel <nogahf@mellanox.com> | 2017-12-04 13:31:11 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-12-05 14:37:13 -0500 |
| commit | 8afa10cbe281b10371fee5a87ab266e48d71a7f9 (patch) | |
| tree | f821390027974ff7b78d22df3862e181bea9d2ca /include/net/red.h | |
| parent | net_sched: red: Avoid devision by zero (diff) | |
| download | linux-dev-8afa10cbe281b10371fee5a87ab266e48d71a7f9.tar.xz linux-dev-8afa10cbe281b10371fee5a87ab266e48d71a7f9.zip | |
net_sched: red: Avoid illegal values
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>
Diffstat (limited to 'include/net/red.h')
| -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 5918f78d36a0..9665582c4687 100644 --- a/include/net/red.h +++ b/include/net/red.h @@ -168,6 +168,17 @@ 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) |