luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

sparc: Fix mmap VA span checking.

Browse Source 
We should not conditionalize VA range checks on MAP_FIXED.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-05-07 02:24:28 -07:00
parent d45100f7b6
commit 5816339310
2 changed files with 3 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/sparc/kernel/sys_sparc.c
View File

@ -223,8 +223,7 @@ int sparc_mmap_check(unsigned long addr, unsigned long len, unsigned long flags)
{
if (ARCH_SUN4C_SUN4 &&
(len > 0x20000000 ||
((flags & MAP_FIXED) &&
addr < 0xe0000000 && addr + len > 0x20000000)))
(addr < 0xe0000000 && addr + len > 0x20000000)))
return -EINVAL;
/* See asm-sparc/uaccess.h */

4
arch/sparc64/kernel/sys_sparc.c
View File

@ -549,13 +549,13 @@ int sparc64_mmap_check(unsigned long addr, unsigned long len,
if (len >= STACK_TOP32)
return -EINVAL;
if ((flags & MAP_FIXED) && addr > STACK_TOP32 - len)
if (addr > STACK_TOP32 - len)
return -EINVAL;
} else {
if (len >= VA_EXCLUDE_START)
return -EINVAL;
if ((flags & MAP_FIXED) && invalid_64bit_range(addr, len))
if (invalid_64bit_range(addr, len))
return -EINVAL;
}