Messages in this thread Patch in this message |  | | | Date | Tue, 14 Jan 2003 10:39:02 +0100 | | From | DervishD <> | | Subject | [PATCH][TRIVIAL] mmap.c corner case fix | |
Hi Marcelo :)
This patch fixes a corner case on the mmap() syscall.
The patch is from David S. Miller, not me. My patch was
incomplete and did nothing on 'big TASK_SIZE' architectures.
The patch is against both 2.4.20 and 2.4.21-pre, is just the same.
Please apply. I sent you the incomplete patch at pre-1 and this bug
is getting older by the minute ;))
Thanks :)
Raúl
--- linux/mm/mmap.c.orig 2002-12-11 13:59:37.000000000 +0100
+++ linux/mm/mmap.c 2002-12-11 14:01:16.000000000 +0100
@@ -403,10 +403,12 @@
if (file && (!file->f_op || !file->f_op->mmap))
return -ENODEV;
- if ((len = PAGE_ALIGN(len)) == 0)
+ if (!len)
return addr;
- if (len > TASK_SIZE)
+ len = PAGE_ALIGN(len);
+
+ if (len > TASK_SIZE || len == 0)
return -EINVAL;
/* offset overflow? */ |  |