This is a note to let you know that I've just added the patch titled
scsi: qedf: Ensure the copied buf is NUL terminated
to the 5.4-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:
scsi-qedf-ensure-the-copied-buf-is-nul-terminated.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f2ed7436ee6a6af2b6819c4280f1a7ca297ff4e7
Author: Bui Quang Minh <minhquangbui99@xxxxxxxxx>
Date: Wed Apr 24 21:44:21 2024 +0700
scsi: qedf: Ensure the copied buf is NUL terminated
[ Upstream commit d0184a375ee797eb657d74861ba0935b6e405c62 ]
Currently, we allocate a count-sized kernel buffer and copy count from
userspace to that buffer. Later, we use kstrtouint on this buffer but we
don't ensure that the string is terminated inside the buffer, this can
lead to OOB read when using kstrtouint. Fix this issue by using
memdup_user_nul instead of memdup_user.
Fixes: 61d8658b4a43 ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.")
Signed-off-by: Bui Quang Minh <minhquangbui99@xxxxxxxxx>
Link: https://lore.kernel.org/r/20240424-fix-oob-read-v2-4-f1f1b53a10f4@xxxxxxxxx
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/scsi/qedf/qedf_debugfs.c b/drivers/scsi/qedf/qedf_debugfs.c
index b0a28a6a9c64a..41e7fab99013c 100644
--- a/drivers/scsi/qedf/qedf_debugfs.c
+++ b/drivers/scsi/qedf/qedf_debugfs.c
@@ -172,7 +172,7 @@ qedf_dbg_debug_cmd_write(struct file *filp, const char __user *buffer,
if (!count || *ppos)
return 0;
- kern_buf = memdup_user(buffer, count);
+ kern_buf = memdup_user_nul(buffer, count);
if (IS_ERR(kern_buf))
return PTR_ERR(kern_buf);
