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authorSagi Grimberg <sagig@mellanox.com>2014-02-23 14:20:08 +0200
committerNicholas Bellinger <nab@linux-iscsi.org>2014-02-23 16:35:32 -0800
commitfc272ec7a2dfe002b823c78f8ef0eb88042e2762 (patch)
treef6eb0a8ba75f656c042816f971316deb8ee3cf80 /drivers/target
parent94387aa7cec8c5386b405b852cf3e5be38456fc7 (diff)
downloadlinux-fc272ec7a2dfe002b823c78f8ef0eb88042e2762.tar.bz2
Target/sbc: Don't use sg as iterator in sbc_verify_read
Because then this sg is passed to sbc_copy_prot which will hit a protection fault in cases we have more than a single sg. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/target_core_sbc.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index ef1a58a134aa..42f18fc1067b 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -1162,7 +1162,7 @@ sbc_dif_verify_read(struct se_cmd *cmd, sector_t start, unsigned int sectors,
{
struct se_device *dev = cmd->se_dev;
struct se_dif_v1_tuple *sdt;
- struct scatterlist *dsg;
+ struct scatterlist *dsg, *psg = sg;
sector_t sector = start;
void *daddr, *paddr;
int i, j, offset = sg_off;
@@ -1170,14 +1170,14 @@ sbc_dif_verify_read(struct se_cmd *cmd, sector_t start, unsigned int sectors,
for_each_sg(cmd->t_data_sg, dsg, cmd->t_data_nents, i) {
daddr = kmap_atomic(sg_page(dsg)) + dsg->offset;
- paddr = kmap_atomic(sg_page(sg)) + sg->offset;
+ paddr = kmap_atomic(sg_page(psg)) + sg->offset;
for (j = 0; j < dsg->length; j += dev->dev_attrib.block_size) {
- if (offset >= sg->length) {
+ if (offset >= psg->length) {
kunmap_atomic(paddr);
- sg = sg_next(sg);
- paddr = kmap_atomic(sg_page(sg)) + sg->offset;
+ psg = sg_next(psg);
+ paddr = kmap_atomic(sg_page(psg)) + psg->offset;
offset = 0;
}