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Merge branch 'work.uaccess-unaligned' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

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Pull uacess-unaligned removal from Al Viro:
 "That stuff had just one user, and an exotic one, at that - binfmt_flat
  on arm and m68k"

* 'work.uaccess-unaligned' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  kill {__,}{get,put}_user_unaligned()
  binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail
This commit is contained in:
Linus Torvalds 2017-07-15 11:17:52 -07:00
commit 89cbec71fe
24 changed files with 168 additions and 450 deletions
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23
arch/m68k/include/asm/flat.h
View file

@ -5,12 +5,29 @@
#ifndef __M68KNOMMU_FLAT_H__
#define __M68KNOMMU_FLAT_H__
#include <linux/uaccess.h>
#define flat_argvp_envp_on_stack() 1
#define flat_old_ram_flag(flags) (flags)
#define flat_reloc_valid(reloc, size) ((reloc) <= (size))
#define flat_get_addr_from_rp(rp, relval, flags, p) \
({ unsigned long __val; __get_user_unaligned(__val, rp); __val; })
#define flat_put_addr_at_rp(rp, val, relval) __put_user_unaligned(val, rp)
static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
u32 *addr, u32 *persistent)
{
#ifdef CONFIG_CPU_HAS_NO_UNALIGNED
return copy_from_user(addr, rp, 4) ? -EFAULT : 0;
#else
return get_user(*addr, rp);
#endif
}
static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel)
{
#ifdef CONFIG_CPU_HAS_NO_UNALIGNED
return copy_to_user(rp, &addr, 4) ? -EFAULT : 0;
#else
return put_user(addr, rp);
#endif
}
#define flat_get_relocate_addr(rel) (rel)
static inline int flat_set_persistent(unsigned long relval,

7
arch/m68k/include/asm/uaccess.h
View file

@ -3,11 +3,4 @@
#else
#include <asm/uaccess_mm.h>
#endif
#include <asm/extable.h>
#ifdef CONFIG_CPU_HAS_NO_UNALIGNED
#include <asm-generic/uaccess-unaligned.h>
#else
#define __get_user_unaligned(x, ptr) __get_user((x), (ptr))
#define __put_user_unaligned(x, ptr) __put_user((x), (ptr))
#endif