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| author | Yi Zou <yi.zou@intel.com> | 2009-10-21 16:27:58 -0700 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2009-12-04 12:00:33 -0600 |
| commit | d37322a43ebac79eef417149f5696390cf8872db (patch) | |
| tree | 71538cfff1bc2bd82e744ece265e7e6c45c07c6f /include/scsi | |
| parent | 7221d7e59d1c675828b6de50b757cd8282011a5d (diff) | |
| download | op-kernel-dev-d37322a43ebac79eef417149f5696390cf8872db.zip op-kernel-dev-d37322a43ebac79eef417149f5696390cf8872db.tar.gz | |
[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>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/fc_frame.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/scsi/fc_frame.h b/include/scsi/fc_frame.h index c35d238..148126d 100644 --- a/include/scsi/fc_frame.h +++ b/include/scsi/fc_frame.h @@ -37,6 +37,9 @@ #define FC_FRAME_HEADROOM 32 /* headroom for VLAN + FCoE headers */ #define FC_FRAME_TAILROOM 8 /* trailer space for FCoE */ +/* Max number of skb frags allowed, reserving one for fcoe_crc_eof page */ +#define FC_FRAME_SG_LEN (MAX_SKB_FRAGS - 1) + #define fp_skb(fp) (&((fp)->skb)) #define fr_hdr(fp) ((fp)->skb.data) #define fr_len(fp) ((fp)->skb.len) |
