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bnx2x: fix dump flag handling

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bnx2x interprets the dump flag as an index of a register preset.
It is important to validate the index to avoid out of bounds
memory accesses.

Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michal Schmidt 2013-07-01 17:23:06 +02:00 committed by David S. Miller
parent 058eec4116
commit 5bb680d6cb
2 changed files with 5 additions and 0 deletions
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3
drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
View File

@ -959,6 +959,9 @@ static int bnx2x_set_dump(struct net_device *dev, struct ethtool_dump *val)
struct bnx2x *bp = netdev_priv(dev);
/* Use the ethtool_dump "flag" field as the dump preset index */
if (val->flag < 1 || val->flag > DUMP_MAX_PRESETS)
return -EINVAL;
bp->dump_preset_idx = val->flag;
return 0;
}

2
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
View File

@ -11636,6 +11636,8 @@ static int bnx2x_init_bp(struct bnx2x *bp)
bp->min_msix_vec_cnt = 2;
BNX2X_DEV_INFO("bp->min_msix_vec_cnt %d", bp->min_msix_vec_cnt);
bp->dump_preset_idx = 1;
return rc;
}