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[SCSI] compat_ioct: fix bsg SG_IO

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bsg's SG_IO doesn't work on 32-bit userspace and 64-bit kernelspace.

The problem is that both sg and bsg drivers use SG_IO
ioctl. sg_ioctl_trans() does 32/64-bit conversion even against bsg
header. It messes up bsg header. bsg driver gets garbage.

This patch fixes sg_ioctl_trans to handle only sg header (struct
sg_io_hdr).

Reported-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
FUJITA Tomonori 2010-01-05 19:41:44 +09:00 committed by James Bottomley
parent 0f19bc681e
commit 84eb8fb42c
1 changed files with 6 additions and 0 deletions
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6
fs/compat_ioctl.c
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@ -301,6 +301,12 @@ static int sg_ioctl_trans(unsigned int fd, unsigned int cmd,
u32 data; u32 data;
void __user *dxferp; void __user *dxferp;
int err; int err;
int interface_id;
if (get_user(interface_id, &sgio32->interface_id))
return -EFAULT;
if (interface_id != 'S')
return sys_ioctl(fd, cmd, (unsigned long)sgio32);
if (get_user(iovec_count, &sgio32->iovec_count)) if (get_user(iovec_count, &sgio32->iovec_count))
return -EFAULT; return -EFAULT;