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-rw-r--r--mm/mremap.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/mm/mremap.c b/mm/mremap.c
index 3708655..457d34e 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -456,13 +456,14 @@ SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len,
unsigned long charged = 0;
bool locked = false;
- down_write(&current->mm->mmap_sem);
-
if (flags & ~(MREMAP_FIXED | MREMAP_MAYMOVE))
- goto out;
+ return ret;
+
+ if (flags & MREMAP_FIXED && !(flags & MREMAP_MAYMOVE))
+ return ret;
if (addr & ~PAGE_MASK)
- goto out;
+ return ret;
old_len = PAGE_ALIGN(old_len);
new_len = PAGE_ALIGN(new_len);
@@ -473,12 +474,13 @@ SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len,
* a zero new-len is nonsensical.
*/
if (!new_len)
- goto out;
+ return ret;
+
+ down_write(&current->mm->mmap_sem);
if (flags & MREMAP_FIXED) {
- if (flags & MREMAP_MAYMOVE)
- ret = mremap_to(addr, old_len, new_addr, new_len,
- &locked);
+ ret = mremap_to(addr, old_len, new_addr, new_len,
+ &locked);
goto out;
}
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