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authorHeiko Carstens <heiko.carstens@de.ibm.com>2009-01-14 14:14:02 +0100
committerHeiko Carstens <heiko.carstens@de.ibm.com>2009-01-14 14:15:18 +0100
commit6673e0c3fbeaed2cd08e2fd4a4aa97382d6fedb0 (patch)
treeeb33a94f5e4b0e035001f7c96ef44cade0fbb489 /fs/sync.c
parented6bb6194350dc6ae97a65dbf2d621a3dbe6bbe9 (diff)
downloadlinux-6673e0c3fbeaed2cd08e2fd4a4aa97382d6fedb0.tar.bz2
[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>
Diffstat (limited to 'fs/sync.c')
-rw-r--r--fs/sync.c26
1 files changed, 22 insertions, 4 deletions
diff --git a/fs/sync.c b/fs/sync.c
index ac02b56548bc..23ebbd72ecc9 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -201,8 +201,8 @@ asmlinkage long sys_fdatasync(unsigned int fd)
* 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_put:
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