This is a note to let you know that I've just added the patch titled iscsi-target: fix memory leak in iscsit_setup_text_cmd() to the 4.12-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: iscsi-target-fix-memory-leak-in-iscsit_setup_text_cmd.patch and it can be found in the queue-4.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From ea8dc5b4cd2195ee582cae28afa4164c6dea1738 Mon Sep 17 00:00:00 2001 From: Varun Prakash <varun@xxxxxxxxxxx> Date: Sun, 23 Jul 2017 20:03:33 +0530 Subject: iscsi-target: fix memory leak in iscsit_setup_text_cmd() From: Varun Prakash <varun@xxxxxxxxxxx> commit ea8dc5b4cd2195ee582cae28afa4164c6dea1738 upstream. 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@xxxxxxxxxxx> Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/target/iscsi/iscsi_target.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -2173,6 +2173,7 @@ iscsit_setup_text_cmd(struct iscsi_conn 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; Patches currently in stable-queue which might be from varun@xxxxxxxxxxx are queue-4.12/iscsi-target-fix-memory-leak-in-iscsit_setup_text_cmd.patch