From 6673e0c3fbeaed2cd08e2fd4a4aa97382d6fedb0 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 14 Jan 2009 14:14:02 +0100 Subject: [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 --- ipc/sem.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'ipc/sem.c') 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, -- cgit v1.2.3