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scsi: qedf: Ensure the copied buf is NUL terminated 

[ Upstream commit d0184a375e ]

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: 61d8658b4a ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.")
Signed-off-by: Bui Quang Minh <minhquangbui99@gmail.com>
Link: https://lore.kernel.org/r/20240424-fix-oob-read-v2-4-f1f1b53a10f4@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Bui Quang Minh 2024-04-24 21:44:21 +07:00 committed by Greg Kroah-Hartman
parent 204714e680
commit 563e609275
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/qedf/qedf_debugfs.c
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@ -170,7 +170,7 @@ 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);