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| author | Varun Prakash | 2017-07-23 16:33:33 +0200 |
|---|---|---|
| committer | Nicholas Bellinger | 2017-07-31 00:31:34 +0200 |
| commit | ea8dc5b4cd2195ee582cae28afa4164c6dea1738 (patch) | |
| tree | 55b2a54d2ccb2213d5cf633306b7ccf9fd8dfda6 /drivers/target/iscsi/iscsi_target.c | |
| parent | cxgbit: add missing __kfree_skb() (diff) | |
| download | kernel-qcow2-linux-ea8dc5b4cd2195ee582cae28afa4164c6dea1738.tar.gz kernel-qcow2-linux-ea8dc5b4cd2195ee582cae28afa4164c6dea1738.tar.xz kernel-qcow2-linux-ea8dc5b4cd2195ee582cae28afa4164c6dea1738.zip | |
iscsi-target: fix memory leak in iscsit_setup_text_cmd()
On receiving text request iscsi-target allocates buffer for
payload in iscsit_handle_text_cmd() and assigns buffer pointer
to cmd->text_in_ptr, this buffer is currently freed in
iscsit_release_cmd(), if iscsi-target sets 'C' bit in text
response then it will receive another text request from the
initiator with ttt != 0xffffffff in this case iscsi-target
will find cmd using itt and call iscsit_setup_text_cmd()
which will set cmd->text_in_ptr to NULL without freeing
previously allocated buffer.
This patch fixes this issue by calling kfree(cmd->text_in_ptr)
in iscsit_setup_text_cmd() before assigning NULL to it.
For the first text request cmd->text_in_ptr is NULL as
cmd is memset to 0 in iscsit_allocate_cmd().
Signed-off-by: Varun Prakash <varun@chelsio.com>
Cc: <stable@vger.kernel.org> # 4.0+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/iscsi/iscsi_target.c')
| -rw-r--r-- | drivers/target/iscsi/iscsi_target.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 74e4975dd1b1..2688918b879a 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -2167,6 +2167,7 @@ iscsit_setup_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); cmd->data_direction = DMA_NONE; + kfree(cmd->text_in_ptr); cmd->text_in_ptr = NULL; return 0; |