On big-endian architectures, the signal masks are differnet
between 32-bit and 64-bit tasks, so we have to use a different
function for reading them from user space.
io_cqring_wait() initially got this wrong, and always interprets
this as a native structure. This is ok on x86 and most arm64,
but not on s390, ppc64be, mips64be, sparc64 and parisc.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
fs/io_uring.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 6aaa30580a2b..8f48d29abf76 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1968,7 +1968,15 @@ static int io_cqring_wait(struct io_ring_ctx *ctx, int min_events,
return 0;
if (sig) {
- ret = set_user_sigmask(sig, &ksigmask, &sigsaved, sigsz);
+#ifdef CONFIG_COMPAT
+ if (in_compat_syscall())
+ ret = set_compat_user_sigmask((const compat_sigset_t __user *)sig,
+ &ksigmask, &sigsaved, sigsz);
+ else
+#endif
+ ret = set_user_sigmask(sig, &ksigmask,
+ &sigsaved, sigsz);
+
if (ret)
return ret;
}
--
2.20.0
