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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 /ipc/sem.c
parented6bb6194350dc6ae97a65dbf2d621a3dbe6bbe9 (diff)
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[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 'ipc/sem.c')
-rw-r--r--ipc/sem.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/ipc/sem.c b/ipc/sem.c
index c68cd3f8f0c..c385c40c061 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -887,7 +887,7 @@ out_up:
return err;
}
-asmlinkage long sys_semctl (int semid, int semnum, int cmd, union semun arg)
+SYSCALL_DEFINE(semctl)(int semid, int semnum, int cmd, union semun arg)
{
int err = -EINVAL;
int version;
@@ -923,6 +923,13 @@ asmlinkage long sys_semctl (int semid, int semnum, int cmd, union semun arg)
return -EINVAL;
}
}
+#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
+asmlinkage long SyS_semctl(int semid, int semnum, int cmd, union semun arg)
+{
+ return SYSC_semctl((int) semid, (int) semnum, (int) cmd, arg);
+}
+SYSCALL_ALIAS(sys_semctl, SyS_semctl);
+#endif
/* If the task doesn't already have a undo_list, then allocate one
* here. We guarantee there is only one thread using this undo list,