kumquat-buildroot/package/uclibc/0.9.33.2/uclibc-0031-mmap-sys_mmap2-do-unsigned-shift-of-offset.patch
Peter Korsgaard 055f1c02d3 uclibc: add upstream 0.9.33 fixes
Upstream has a large number of patches lined up for the next 0.9.33.x bugfix
release;

http://git.uclibc.org/uClibc/log/?h=0.9.33

Add them here, as atleast some of them are quite critical (E.G. the eventfd
issue gets triggered by recent glib versions).

I've skipped the microblaze and xtensa fixes as we don't currently support
those with 0.9.33.2.

Drop uclibc-0002-Add-definition-of-MSG_WAITFORONE-and-MSG_CMSG_CMSG_CLOEXE.patch
as that is a subset of uclibc-0035-socket.h-pull-socket_type.h-from-eglibc.patch

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-09-06 15:28:51 +02:00

36 lines
1.4 KiB
Diff

From 569d1423ac2b585b5cb38bee545b5e0ae2bd7f67 Mon Sep 17 00:00:00 2001
From: James Hogan <james.hogan@imgtec.com>
Date: Thu, 17 May 2012 12:42:54 +0100
Subject: [PATCH] mmap()->sys_mmap2: do unsigned shift of offset
Fix the implementation of mmap based on the mmap2 system call, to
construct pgoffset from offset with an unsigned shift rather than a
signed (off_t) shift. The mmap2 test in the testsuite catches this case
by mmap'ing with a large offset (with the sign bit set). The signed
shift repeats the sign bit making the page shift way out of range. This
is already fixed similarly in mmap64().
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
libc/sysdeps/linux/common/mmap.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libc/sysdeps/linux/common/mmap.c b/libc/sysdeps/linux/common/mmap.c
index 8995898..d53eabb 100644
--- a/libc/sysdeps/linux/common/mmap.c
+++ b/libc/sysdeps/linux/common/mmap.c
@@ -63,7 +63,8 @@ __ptr_t mmap(__ptr_t addr, size_t len, int prot, int flags, int fd, __off_t offs
__set_errno(EINVAL);
return MAP_FAILED;
}
- return __syscall_mmap2(addr, len, prot, flags, fd, offset >> MMAP2_PAGE_SHIFT);
+ return __syscall_mmap2(addr, len, prot, flags,
+ fd, ((__u_long) offset >> MMAP2_PAGE_SHIFT));
}
libc_hidden_def(mmap)
--
1.7.10.4