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Message-ID: <20240621141955.14882-C-hca@linux.ibm.com>
Date: Fri, 21 Jun 2024 16:19:55 +0200
From: Heiko Carstens <hca@...ux.ibm.com>
To: Arnd Bergmann <arnd@...nel.org>
Cc: linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
Arnd Bergmann <arnd@...db.de>,
Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
linux-mips@...r.kernel.org, Helge Deller <deller@....de>,
linux-parisc@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
Andreas Larsson <andreas@...sler.com>, sparclinux@...r.kernel.org,
Michael Ellerman <mpe@...erman.id.au>,
Nicholas Piggin <npiggin@...il.com>,
Christophe Leroy <christophe.leroy@...roup.eu>,
"Naveen N . Rao" <naveen.n.rao@...ux.ibm.com>,
linuxppc-dev@...ts.ozlabs.org, Brian Cain <bcain@...cinc.com>,
linux-hexagon@...r.kernel.org, Guo Ren <guoren@...nel.org>,
linux-csky@...r.kernel.org, linux-s390@...r.kernel.org,
Rich Felker <dalias@...c.org>,
John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
linux-sh@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
Alexander Viro <viro@...iv.linux.org.uk>,
Christian Brauner <brauner@...nel.org>, linux-fsdevel@...r.kernel.org,
libc-alpha@...rceware.org, musl@...ts.openwall.com, ltp@...ts.linux.it,
stable@...r.kernel.org
Subject: Re: [PATCH 02/15] syscalls: fix compat_sys_io_pgetevents_time64 usage
On Thu, Jun 20, 2024 at 06:23:03PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
>
> Using sys_io_pgetevents() as the entry point for compat mode tasks
> works almost correctly, but misses the sign extension for the min_nr
> and nr arguments.
>
> This was addressed on parisc by switching to
> compat_sys_io_pgetevents_time64() in commit 6431e92fc827 ("parisc:
> io_pgetevents_time64() needs compat syscall in 32-bit compat mode"),
> as well as by using more sophisticated system call wrappers on x86 and
> s390. However, arm64, mips, powerpc, sparc and riscv still have the
> same bug.
>
> Changes all of them over to use compat_sys_io_pgetevents_time64()
> like parisc already does. This was clearly the intention when the
> function was originally added, but it got hooked up incorrectly in
> the tables.
>
> Cc: stable@...r.kernel.org
> Fixes: 48166e6ea47d ("y2038: add 64-bit time_t syscalls to all 32-bit architectures")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
> arch/arm64/include/asm/unistd32.h | 2 +-
> arch/mips/kernel/syscalls/syscall_n32.tbl | 2 +-
> arch/mips/kernel/syscalls/syscall_o32.tbl | 2 +-
> arch/powerpc/kernel/syscalls/syscall.tbl | 2 +-
> arch/s390/kernel/syscalls/syscall.tbl | 2 +-
> arch/sparc/kernel/syscalls/syscall.tbl | 2 +-
> arch/x86/entry/syscalls/syscall_32.tbl | 2 +-
> include/uapi/asm-generic/unistd.h | 2 +-
> 8 files changed, 8 insertions(+), 8 deletions(-)
Acked-by: Heiko Carstens <hca@...ux.ibm.com> # s390
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