[S390] dasd: add proper compat pointer conversion for symmetrix ioctl
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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d381589834
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f8b068593d
1 changed files with 9 additions and 5 deletions
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@ -23,6 +23,7 @@
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#include <asm/debug.h>
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#include <asm/idals.h>
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#include <asm/ebcdic.h>
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#include <asm/compat.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/cio.h>
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@ -2844,13 +2845,16 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp)
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rc = -EFAULT;
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if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
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goto out;
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#ifndef CONFIG_64BIT
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/* Make sure pointers are sane even on 31 bit. */
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if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) {
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if (is_compat_task() || sizeof(long) == 4) {
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/* Make sure pointers are sane even on 31 bit. */
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rc = -EINVAL;
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goto out;
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if ((usrparm.psf_data >> 32) != 0)
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goto out;
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if ((usrparm.rssd_result >> 32) != 0)
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goto out;
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usrparm.psf_data &= 0x7fffffffULL;
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usrparm.rssd_result &= 0x7fffffffULL;
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}
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#endif
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/* alloc I/O data area */
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psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
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rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
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