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| 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 /ipc/sem.c | |
| parent | ed6bb6194350dc6ae97a65dbf2d621a3dbe6bbe9 (diff) | |
| download | linux-3.10-6673e0c3fbeaed2cd08e2fd4a4aa97382d6fedb0.tar.gz linux-3.10-6673e0c3fbeaed2cd08e2fd4a4aa97382d6fedb0.tar.bz2 linux-3.10-6673e0c3fbeaed2cd08e2fd4a4aa97382d6fedb0.zip | |
[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.c | 9 |
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, |