FAILED: patch "[PATCH] scsi: qla2xxx: Zero dport diagnostics buffer to avoid info" failed to apply to 6.12-stable tree

The patch below does not apply to the 6.12-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y
git checkout FETCH_HEAD
git cherry-pick -x a152edab3854f01dd2daf3eaf8f32cbabdb3834e
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026090929-drown-fructose-985e@gregkh' --subject-prefix 'PATCH 6.12.y' 'HEAD^..'

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From a152edab3854f01dd2daf3eaf8f32cbabdb3834e Mon Sep 17 00:00:00 2001
From: Nilesh Javali <[email protected]>
Date: Thu, 23 Jul 2026 10:34:10 +0530
Subject: [PATCH] scsi: qla2xxx: Zero dport diagnostics buffer to avoid info
leak

qla2x00_do_dport_diagnostics() allocates the qla_dport_diag response buffer with kmalloc_obj() (non-zeroing) and, on success, copies the full sizeof(*dd) back to user space via sg_copy_from_buffer(). The inbound sg_copy_to_buffer() only fills as many bytes as the user request payload provides, and qla26xx_dport_diagnostics() zeroes only dd->buf. The options and unused[] fields are therefore copied out uninitialized, leaking kernel heap contents to user space.

Allocate with kzalloc_obj(), matching qla2x00_do_dport_diagnostics_v2().

index f9f9687316b5..4a9cf8da67a6 100644
@@ -2806,7 +2806,7 @@ qla2x00_do_dport_diagnostics(struct bsg_job *bsg_job)
 	    !IS_QLA28XX(vha->hw) && !IS_QLA29XX(vha->hw))
 		return -EPERM;
 
-	dd = kmalloc_obj(*dd);
+	dd = kzalloc_obj(*dd);
 	if (!dd) {
 		ql_log(ql_log_warn, vha, 0x70db,
 		    "Failed to allocate memory for dport.\n");

From: Nilesh Javali <[email protected]>

[ Upstream commit a152edab3854f01dd2daf3eaf8f32cbabdb3834e ]

qla2x00_do_dport_diagnostics() allocates the qla_dport_diag response buffer with kmalloc_obj() (non-zeroing) and, on success, copies the full sizeof(*dd) back to user space via sg_copy_from_buffer(). The inbound sg_copy_to_buffer() only fills as many bytes as the user request payload provides, and qla26xx_dport_diagnostics() zeroes only dd->buf. The options and unused[] fields are therefore copied out uninitialized, leaking kernel heap contents to user space.

Allocate with kzalloc_obj(), matching qla2x00_do_dport_diagnostics_v2().

---
 drivers/scsi/qla2xxx/qla_bsg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index f43969ed87bf9..9319b81ea0b8c 100644
@@ -2393,7 +2393,7 @@ qla2x00_do_dport_diagnostics(struct bsg_job *bsg_job)
 	    !IS_QLA28XX(vha->hw))
 		return -EPERM;
 
-	dd = kmalloc(sizeof(*dd), GFP_KERNEL);
+	dd = kzalloc(sizeof(*dd), GFP_KERNEL);
 	if (!dd) {
 		ql_log(ql_log_warn, vha, 0x70db,
 		    "Failed to allocate memory for dport.\n");

2.53.0