linux-kernel - [PATCH] aio: Wire up compat_sys_io_pgetevents

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Date:   Tue, 21 Sep 2021 14:01:27 +0100
From:   Richard Palethorpe <rpalethorpe@...e.com>
To:     linux-fsdevel@...r.kernel.org
Cc:     Richard Palethorpe <rpalethorpe@...e.com>,
        linux-api@...r.kernel.org, linux-aio@...ck.org,
        y2038@...ts.linaro.org, Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        Arnd Bergmann <arnd@...db.de>,
        Deepa Dinamani <deepa.kernel@...il.com>,
        linux-kernel@...r.kernel.org, ltp@...ts.linux.it
Subject: [PATCH] aio: Wire up compat_sys_io_pgetevents_time64 for x86

The LTP test io_pgetevents02 fails in 32bit compat mode because an
nr_max of -1 appears to be treated as a large positive integer. This
causes pgetevents_time64 to return an event. The test expects the call
to fail and errno to be set to EINVAL.

Using the compat syscall fixes the issue.

Fixes: 7a35397f8c06 ("io_pgetevents: use __kernel_timespec")
Signed-off-by: Richard Palethorpe <rpalethorpe@...e.com>
---
 arch/x86/entry/syscalls/syscall_32.tbl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index 960a021d543e..0985d8333368 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -420,7 +420,7 @@
 412	i386	utimensat_time64	sys_utimensat
 413	i386	pselect6_time64		sys_pselect6			compat_sys_pselect6_time64
 414	i386	ppoll_time64		sys_ppoll			compat_sys_ppoll_time64
-416	i386	io_pgetevents_time64	sys_io_pgetevents
+416	i386	io_pgetevents_time64	sys_io_pgetevents		compat_sys_io_pgetevents_time64
 417	i386	recvmmsg_time64		sys_recvmmsg			compat_sys_recvmmsg_time64
 418	i386	mq_timedsend_time64	sys_mq_timedsend
 419	i386	mq_timedreceive_time64	sys_mq_timedreceive
-- 
2.31.1