[CVE-2009-0029] System call wrapper special cases
System calls with an unsigned long long argument can't be converted with
the standard wrappers since that would include a cast to long, which in
turn means that we would lose the upper 32 bit on 32 bit architectures.
Also semctl can't use the standard wrapper since it has a 'union'
parameter.
So we handle them as special case and add some extra wrappers instead.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
diff --git a/fs/sync.c b/fs/sync.c
index ac02b56..23ebbd7 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -201,8 +201,8 @@
* already-instantiated disk blocks, there are no guarantees here that the data
* will be available after a crash.
*/
-asmlinkage long sys_sync_file_range(int fd, loff_t offset, loff_t nbytes,
- unsigned int flags)
+SYSCALL_DEFINE(sync_file_range)(int fd, loff_t offset, loff_t nbytes,
+ unsigned int flags)
{
int ret;
struct file *file;
@@ -262,14 +262,32 @@
out:
return ret;
}
+#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
+asmlinkage long SyS_sync_file_range(long fd, loff_t offset, loff_t nbytes,
+ long flags)
+{
+ return SYSC_sync_file_range((int) fd, offset, nbytes,
+ (unsigned int) flags);
+}
+SYSCALL_ALIAS(sys_sync_file_range, SyS_sync_file_range);
+#endif
/* It would be nice if people remember that not all the world's an i386
when they introduce new system calls */
-asmlinkage long sys_sync_file_range2(int fd, unsigned int flags,
- loff_t offset, loff_t nbytes)
+SYSCALL_DEFINE(sync_file_range2)(int fd, unsigned int flags,
+ loff_t offset, loff_t nbytes)
{
return sys_sync_file_range(fd, offset, nbytes, flags);
}
+#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
+asmlinkage long SyS_sync_file_range2(long fd, long flags,
+ loff_t offset, loff_t nbytes)
+{
+ return SYSC_sync_file_range2((int) fd, (unsigned int) flags,
+ offset, nbytes);
+}
+SYSCALL_ALIAS(sys_sync_file_range2, SyS_sync_file_range2);
+#endif
/*
* `endbyte' is inclusive
