diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2009-01-14 14:14:02 +0100 |
|---|---|---|
| committer | Heiko Carstens <heiko.carstens@de.ibm.com> | 2009-01-14 14:15:18 +0100 |
| commit | 6673e0c3fbeaed2cd08e2fd4a4aa97382d6fedb0 (patch) | |
| tree | eb33a94f5e4b0e035001f7c96ef44cade0fbb489 /fs/dcookies.c | |
| parent | ed6bb6194350dc6ae97a65dbf2d621a3dbe6bbe9 (diff) | |
[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/dcookies.c')
| -rw-r--r-- | fs/dcookies.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/dcookies.c b/fs/dcookies.c index 180e9fec4ad..a21cabdbd87 100644 --- a/fs/dcookies.c +++ b/fs/dcookies.c @@ -145,7 +145,7 @@ out: /* And here is where the userspace process can look up the cookie value * to retrieve the path. */ -asmlinkage long sys_lookup_dcookie(u64 cookie64, char __user * buf, size_t len) +SYSCALL_DEFINE(lookup_dcookie)(u64 cookie64, char __user * buf, size_t len) { unsigned long cookie = (unsigned long)cookie64; int err = -EINVAL; @@ -198,7 +198,13 @@ out: mutex_unlock(&dcookie_mutex); return err; } - +#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS +asmlinkage long SyS_lookup_dcookie(u64 cookie64, long buf, long len) +{ + return SYSC_lookup_dcookie(cookie64, (char __user *) buf, (size_t) len); +} +SYSCALL_ALIAS(sys_lookup_dcookie, SyS_lookup_dcookie); +#endif static int dcookie_init(void) { |