From: Varun Prakash Date: Sun, 23 Jul 2017 14:33:33 +0000 (+0530) Subject: iscsi-target: fix memory leak in iscsit_setup_text_cmd() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ea8dc5b4cd2195ee582cae28afa4164c6dea1738;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git 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 Cc: # 4.0+ Signed-off-by: Nicholas Bellinger --- 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;