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| author | Varun Prakash <varun@chelsio.com> | 2020-08-25 15:35:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-17 14:45:29 +0300 |
| commit | 549a2cac6bc278b7f238a59eeb644205a10a86ca (patch) | |
| tree | 5b028945a88b4e69501af0f2514531307b0960ca /drivers/target/iscsi | |
| parent | e0717ed3379d3c04b7307c804a24ca3e6769c39f (diff) | |
| download | linux-549a2cac6bc278b7f238a59eeb644205a10a86ca.tar.xz | |
scsi: target: iscsi: Fix data digest calculation
commit 5528d03183fe5243416c706f64b1faa518b05130 upstream.
Current code does not consider 'page_off' in data digest calculation. To
fix this, add a local variable 'first_sg' and set first_sg.offset to
sg->offset + page_off.
Link: https://lore.kernel.org/r/1598358910-3052-1-git-send-email-varun@chelsio.com
Fixes: e48354ce078c ("iscsi-target: Add iSCSI fabric support for target v4.1")
Cc: <stable@vger.kernel.org>
Reviewed-by: Mike Christie <michael.christie@oralce.com>
Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/target/iscsi')
| -rw-r--r-- | drivers/target/iscsi/iscsi_target.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 1633e2666268..2602b57936d4 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -1381,14 +1381,27 @@ static u32 iscsit_do_crypto_hash_sg( sg = cmd->first_data_sg; page_off = cmd->first_data_sg_off; + if (data_length && page_off) { + struct scatterlist first_sg; + u32 len = min_t(u32, data_length, sg->length - page_off); + + sg_init_table(&first_sg, 1); + sg_set_page(&first_sg, sg_page(sg), len, sg->offset + page_off); + + ahash_request_set_crypt(hash, &first_sg, NULL, len); + crypto_ahash_update(hash); + + data_length -= len; + sg = sg_next(sg); + } + while (data_length) { - u32 cur_len = min_t(u32, data_length, (sg->length - page_off)); + u32 cur_len = min_t(u32, data_length, sg->length); ahash_request_set_crypt(hash, sg, NULL, cur_len); crypto_ahash_update(hash); data_length -= cur_len; - page_off = 0; /* iscsit_map_iovec has already checked for invalid sg pointers */ sg = sg_next(sg); } |