block: cciss: fix information leak to userland · 7ab5118d7c - Gogs

block: cciss: fix information leak to userland

Structure IOCTL_Command_struct is copied to userland with
some padding fields at the end of the struct unitialized.
It leads to leaking of contents of kernel stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

Vasiliy Kulikov 14 years ago

parent

027b180d74

commit

7ab5118d7c

1 changed files with 1 additions and 0 deletions

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drivers/block/cciss.c
							 
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				@@ -1184,6 +1184,7 @@ static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
			
				 	int err;
			
				 	u32 cp;
			
				+	memset(&arg64, 0, sizeof(arg64));
			
				 	err = 0;
			
				 	err |=
			
				 	    copy_from_user(&arg64.LUN_info, &arg32->LUN_info,