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scsi: qedf: Ensure the copied buf is NUL terminated

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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>
This commit is contained in:
Bui Quang Minh 2024-04-24 21:44:21 +07:00 committed by Martin K. Petersen
parent 13d0cecb46
commit d0184a375e
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);