[mips] Zero upper 32-bits of compat llseek (closes: #521016)

svn path=/dists/sid/linux-2.6/; revision=13320

debian/changelog

@@ -16,6 +16,7 @@ linux-2.6 (2.6.29-2) UNRELEASED; urgency=low
 
   [ dann frazier ]
   * bnx2: correct firmware revisions (closes: #522049)
+  * [mips] Zero upper 32-bits of compat llseek (closes: #521016)
 
  -- Martin Michlmayr <tbm@cyrius.com>  Wed, 25 Mar 2009 08:57:14 +0100
 

debian/patches/bugfix/mips/compat-zero-upper-32bits-of-offset_high-and-offset_low.patch

@@ -0,0 +1,30 @@
+commit d6c178e9694e7e0c7ffe0289cf4389a498cac735
+Author: Ralf Baechle <ralf@linux-mips.org>
+Date:   Sat Mar 28 01:36:09 2009 +0100
+
+    MIPS: Compat: Zero upper 32-bit of offset_high and offset_low.
+    
+    Through sys_llseek() arguably should do exactly that it doesn't which
+    means llseek(2) will fail for o32 processes if offset_low has bit 31 set.
+    
+    As suggested by Heiko Carstens.
+    
+    Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+
+diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
+index 2a47271..6242bc6 100644
+--- a/arch/mips/kernel/linux32.c
++++ b/arch/mips/kernel/linux32.c
+@@ -133,9 +133,9 @@ SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy,
+ 	return sys_ftruncate(fd, merge_64(a2, a3));
+ }
+ 
+-SYSCALL_DEFINE5(32_llseek, unsigned long, fd, unsigned long, offset_high,
+-	unsigned long, offset_low, loff_t __user *, result,
+-	unsigned long, origin)
++SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high,
++		unsigned int, offset_low, loff_t __user *, result,
++		unsigned int, origin)
+ {
+ 	return sys_llseek(fd, offset_high, offset_low, result, origin);
+ }

debian/patches/series/2

@@ -1,2 +1,3 @@
 + debian/dfsg/drivers-net-bnx2-fw-verfix.patch
 + bugfix/all/stable/patch-2.6.29.1
++ bugfix/mips/compat-zero-upper-32bits-of-offset_high-and-offset_low.patch