From d37322a43ebac79eef417149f5696390cf8872db Mon Sep 17 00:00:00 2001 From: Yi Zou <yi.zou@intel.com> Date: Wed, 21 Oct 2009 16:27:58 -0700 Subject: [SCSI] libfc: Fix frags in frame exceeding SKB_MAX_FRAGS in fc_fcp_send_data In case of sequence offload, in fc_fcp_send_data(), the skb_fill_page_info() called may end up adding more frags to the skb_shinfo(fp_skb(fp))->frags[], exceeding SKB_MAX_FRAGS, this eventually corrupts the memory. I am adding the FR_FRAME_SG_LEN back, but as SKB_MAX_FRAGS -1, leaving 1 for our fcoe_eof_crc page. And send will be broken into multiple large sends if the frame already contains more frags than skb handle. Signed-off-by: Yi Zou <yi.zou@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de> --- drivers/scsi/libfc/fc_fcp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c index 40ed7442d9d..28bfe1c2c50 100644 --- a/drivers/scsi/libfc/fc_fcp.c +++ b/drivers/scsi/libfc/fc_fcp.c @@ -574,7 +574,8 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq, tlen -= sg_bytes; remaining -= sg_bytes; - if (tlen) + if ((skb_shinfo(fp_skb(fp))->nr_frags < FC_FRAME_SG_LEN) && + (tlen)) continue; /* -- cgit v1.2.3-70-g09d2