Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

[PATCH] ppc32: Fix address checking on lmw/stmw align exception

Browse source 
The handling of misaligned load/store multiple instructions did not check
to see if the address was ok to access before using __{get,put}_user().

Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paul Mackerras 2005-05-01 08:58:42 -07:00 committed by Linus Torvalds
parent b20cc8aff2
commit d5812a77e5
1 changed files with 4 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
arch/ppc/kernel/align.c
View file

@ -290,6 +290,10 @@ fix_alignment(struct pt_regs *regs)
/* lwm, stmw */
nb = (32 - reg) * 4;
}
if (!access_ok((flags & ST? VERIFY_WRITE: VERIFY_READ), addr, nb+nb0))
return -EFAULT; /* bad address */
rptr = (unsigned char *) &regs->gpr[reg];
if (flags & LD) {
for (i = 0; i < nb; ++i)