From c20bda341946c8ee77baec3bec7c5cd615ddf869 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Mon, 27 Sep 2021 17:43:44 -0500 Subject: scsi: target: tcmu: Use struct_size() helper in kmalloc() Make use of the struct_size() helper instead of an open-coded version, in order to avoid any potential type mistakes or integer overflows that, in the worst scenario, could lead to heap overflows. Link: https://github.com/KSPP/linux/issues/160 Link: https://lore.kernel.org/r/20210927224344.GA190701@embeddedor Reviewed-by: Bodo Stroesser Signed-off-by: Gustavo A. R. Silva Signed-off-by: Martin K. Petersen --- drivers/target/target_core_user.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers/target') diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index 9f552f48084c..dc220fad06fa 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -1255,7 +1255,6 @@ tcmu_tmr_notify(struct se_device *se_dev, enum tcm_tmreq_table tmf, { int i = 0, cmd_cnt = 0; bool unqueued = false; - uint16_t *cmd_ids = NULL; struct tcmu_cmd *cmd; struct se_cmd *se_cmd; struct tcmu_tmr *tmr; @@ -1292,7 +1291,7 @@ tcmu_tmr_notify(struct se_device *se_dev, enum tcm_tmreq_table tmf, pr_debug("TMR event %d on dev %s, aborted cmds %d, afflicted cmd_ids %d\n", tcmu_tmr_type(tmf), udev->name, i, cmd_cnt); - tmr = kmalloc(sizeof(*tmr) + cmd_cnt * sizeof(*cmd_ids), GFP_NOIO); + tmr = kmalloc(struct_size(tmr, tmr_cmd_ids, cmd_cnt), GFP_NOIO); if (!tmr) goto unlock; -- cgit v1.2.3