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block: cciss: fix information leak to userland

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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 <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Vasiliy Kulikov 2010-10-28 06:31:55 -06:00 • committed by Jens Axboe
commit 7ab5118d7c
1 changed files with 1 additions and 0 deletions
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1
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,