diff options
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index fba7fd28cb..08fdd94014 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -3140,9 +3140,15 @@ static abi_long do_ipc(unsigned int call, int first, ret = get_errno(semget(first, second, third)); break; - case IPCOP_semctl: - ret = do_semctl(first, second, third, (union target_semun)(abi_ulong) ptr); + case IPCOP_semctl: { + /* The semun argument to semctl is passed by value, so dereference the + * ptr argument. */ + abi_ulong atptr; + get_user_ual(atptr, (abi_ulong)ptr); + ret = do_semctl(first, second, third, + (union target_semun)(abi_ulong) atptr); break; + } case IPCOP_msgget: ret = get_errno(msgget(first, second)); |