The commit is pushed to "branch-rh7-3.10.0-693.21.1.vz7.46.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-693.21.1.vz7.46.2
------>
commit 36ec28ad5177e3c5cbfa8a86f625d4f0760c85c5
Author: Varun Prakash <va...@chelsio.com>
Date: Mon Apr 2 17:28:30 2018 +0300
ms/iscsi-target: fix memory leak in iscsit_setup_text_cmd()
ML: ea8dc5b4cd2195ee582cae28afa4164c6dea1738
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 <va...@chelsio.com>
Cc: <sta...@vger.kernel.org> # 4.0+
Signed-off-by: Nicholas Bellinger <n...@linux-iscsi.org>
Signed-off-by: Andrei Vagin <ava...@openvz.org>
---
drivers/target/iscsi/iscsi_target.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/target/iscsi/iscsi_target.c
b/drivers/target/iscsi/iscsi_target.c
index ea8573e9e129..aeba04aee4bb 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -2164,6 +2164,7 @@ 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;
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