From bf11315eeda510ea4fc1a2bf972d8155d31d89b4 Mon Sep 17 00:00:00 2001 From: Stanislav Yakovlev Date: Mon, 15 Oct 2012 14:14:32 +0000 Subject: [PATCH] net/wireless: ipw2200: Fix panic occurring in ipw_handle_promiscuous_tx() The driver does not count space of radiotap fields when allocating skb for radiotap packet. This leads to kernel panic with the following call trace: ... [67607.676067] [] error_code+0x67/0x6c [67607.676067] [] ? skb_put+0x91/0xa0 [67607.676067] [] ? ipw_handle_promiscuous_tx+0x16b/0x2d0 [ipw2200] [67607.676067] [] ipw_handle_promiscuous_tx+0x16b/0x2d0 [ipw2200] [67607.676067] [] ipw_net_hard_start_xmit+0x8b/0x90 [ipw2200] [67607.676067] [] libipw_xmit+0x55a/0x980 [libipw] [67607.676067] [] dev_hard_start_xmit+0x218/0x4d0 ... This bug was found by VittGam. https://bugzilla.kernel.org/show_bug.cgi?id=43255 Cc: stable@kernel.org Signed-off-by: Stanislav Yakovlev Signed-off-by: John W. Linville --- drivers/net/wireless/ipw2x00/ipw2200.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/ipw2x00/ipw2200.c b/drivers/net/wireless/ipw2x00/ipw2200.c index 935120fc8c93..768bf612533e 100644 --- a/drivers/net/wireless/ipw2x00/ipw2200.c +++ b/drivers/net/wireless/ipw2x00/ipw2200.c @@ -10472,7 +10472,7 @@ static void ipw_handle_promiscuous_tx(struct ipw_priv *priv, } else len = src->len; - dst = alloc_skb(len + sizeof(*rt_hdr), GFP_ATOMIC); + dst = alloc_skb(len + sizeof(*rt_hdr) + sizeof(u16)*2, GFP_ATOMIC); if (!dst) continue; -- 2.20.1