New syscalls should use the same entry point for x86_64 and x86_x32 paths. Add a wrapper for x32 calls to use parse functions that assumes 32bit pointers.
Signed-off-by: André Almeida andrealmeid@collabora.com --- kernel/futex2.c | 36 +++++++++++++++++++++++++++++++++++- 1 file changed, 35 insertions(+), 1 deletion(-)
diff --git a/kernel/futex2.c b/kernel/futex2.c index 1e97e5f2e793..5fd0b3d73b53 100644 --- a/kernel/futex2.c +++ b/kernel/futex2.c @@ -23,6 +23,10 @@ #include <linux/syscalls.h> #include <uapi/linux/futex.h>
+#ifdef CONFIG_X86_64 +#include <linux/compat.h> +#endif + /** * struct futex_key - Components to build unique key for a futex * @pointer: Pointer to current->mm or inode's UUID for file backed futexes @@ -910,7 +914,16 @@ SYSCALL_DEFINE4(futex_waitv, struct futex_waitv __user *, waiters, futexv->hint = false; futexv->task = current;
- ret = futex_parse_waitv(futexv, waiters, nr_futexes); +#ifdef CONFIG_X86_X32_ABI + if (in_x32_syscall()) { + ret = compat_futex_parse_waitv(futexv, (struct compat_futex_waitv *)waiters, + nr_futexes); + } else +#endif + { + ret = futex_parse_waitv(futexv, waiters, nr_futexes); + } + if (!ret) ret = __futex_waitv(futexv, nr_futexes, timo, flags);
@@ -1215,6 +1228,27 @@ SYSCALL_DEFINE6(futex_requeue, struct futex_requeue __user *, uaddr1, if (ret) return ret;
+#ifdef CONFIG_X86_X32_ABI + if (in_x32_syscall()) { + ret = compat_futex_parse_requeue(&rq1, (struct compat_futex_requeue *)uaddr1); + if (ret) + return ret; + + ret = compat_futex_parse_requeue(&rq2, (struct compat_futex_requeue *)uaddr2); + if (ret) + return ret; + } else +#endif + { + ret = futex_parse_requeue(&rq1, uaddr1); + if (ret) + return ret; + + ret = futex_parse_requeue(&rq2, uaddr2); + if (ret) + return ret; + } + return __futex_requeue(rq1, rq2, nr_wake, nr_requeue, cmpval); }