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| author | Michal Schmidt <mschmidt@redhat.com> | 2016-04-29 12:06:50 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-02 03:59:43 +0300 |
| commit | 0b86a2a1e5807326f8eb44e9919d0baadeda3a69 (patch) | |
| tree | 404940448a1d0328d423331e1390b2e1fb545b28 /drivers/net/ethernet/chelsio/cxgb3 | |
| parent | c489565b536ff5382460273fd9513f0adebec024 (diff) | |
| download | linux-0b86a2a1e5807326f8eb44e9919d0baadeda3a69.tar.xz | |
cxgb3: fix out of bounds read
An out of bounds read of 2 bytes was discovered in cxgb3 with KASAN.
t3_config_rss() expects both arrays it gets as parameters to have
terminators. setup_rss(), the caller, forgets to add a terminator to
one of the arrays. Thankfully the iteration in t3_config_rss() stops
anyway, but in the last iteration the check for the terminator
is an out of bounds read.
Add the missing terminator to rspq_map[].
Reported-by: Jan Stancek <jstancek@redhat.com>
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/chelsio/cxgb3')
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c index 60908eab3b3a..43da891fab97 100644 --- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c +++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c @@ -576,7 +576,7 @@ static void setup_rss(struct adapter *adap) unsigned int nq0 = adap2pinfo(adap, 0)->nqsets; unsigned int nq1 = adap->port[1] ? adap2pinfo(adap, 1)->nqsets : 1; u8 cpus[SGE_QSETS + 1]; - u16 rspq_map[RSS_TABLE_SIZE]; + u16 rspq_map[RSS_TABLE_SIZE + 1]; for (i = 0; i < SGE_QSETS; ++i) cpus[i] = i; @@ -586,6 +586,7 @@ static void setup_rss(struct adapter *adap) rspq_map[i] = i % nq0; rspq_map[i + RSS_TABLE_SIZE / 2] = (i % nq1) + nq0; } + rspq_map[RSS_TABLE_SIZE] = 0xffff; /* terminator */ t3_config_rss(adap, F_RQFEEDBACKENABLE | F_TNLLKPEN | F_TNLMAPEN | F_TNLPRTEN | F_TNL2TUPEN | F_TNL4TUPEN | |