This is a note to let you know that I've just added the patch titled
parisc: io_pgetevents_time64() needs compat syscall in 32-bit compat mode
to the 5.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
parisc-io_pgetevents_time64-needs-compat-syscall-in-32-bit-compat-mode.patch
and it can be found in the queue-5.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6431e92fc827bdd2d28f79150d90415ba9ce0d21 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@xxxxxx>
Date: Mon, 1 Aug 2022 17:36:15 +0200
Subject: parisc: io_pgetevents_time64() needs compat syscall in 32-bit compat mode
From: Helge Deller <deller@xxxxxx>
commit 6431e92fc827bdd2d28f79150d90415ba9ce0d21 upstream.
For all syscalls in 32-bit compat mode on 64-bit kernels the upper
32-bits of the 64-bit registers are zeroed out, so a negative 32-bit
signed value will show up as positive 64-bit signed value.
This behaviour breaks the io_pgetevents_time64() syscall which expects
signed 64-bit values for the "min_nr" and "nr" parameters.
Fix this by switching to the compat_sys_io_pgetevents_time64() syscall,
which uses "compat_long_t" types for those parameters.
Cc: <stable@xxxxxxxxxxxxxxx> # v5.1+
Signed-off-by: Helge Deller <deller@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/parisc/kernel/syscalls/syscall.tbl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/parisc/kernel/syscalls/syscall.tbl
+++ b/arch/parisc/kernel/syscalls/syscall.tbl
@@ -413,7 +413,7 @@
412 32 utimensat_time64 sys_utimensat sys_utimensat
413 32 pselect6_time64 sys_pselect6 compat_sys_pselect6_time64
414 32 ppoll_time64 sys_ppoll compat_sys_ppoll_time64
-416 32 io_pgetevents_time64 sys_io_pgetevents sys_io_pgetevents
+416 32 io_pgetevents_time64 sys_io_pgetevents compat_sys_io_pgetevents_time64
417 32 recvmmsg_time64 sys_recvmmsg compat_sys_recvmmsg_time64
418 32 mq_timedsend_time64 sys_mq_timedsend sys_mq_timedsend
419 32 mq_timedreceive_time64 sys_mq_timedreceive sys_mq_timedreceive
Patches currently in stable-queue which might be from deller@xxxxxx are
queue-5.19/fbcon-fix-accelerated-fbdev-scrolling-while-logo-is-still-shown.patch
queue-5.19/parisc-fix-device-names-in-proc-iomem.patch
queue-5.19/fbcon-fix-boundary-checks-for-fbcon-vc-n1-n2-parameters.patch
queue-5.19/parisc-drop-pa_swapper_pg_lock-spinlock.patch
queue-5.19/parisc-io_pgetevents_time64-needs-compat-syscall-in-32-bit-compat-mode.patch
queue-5.19/parisc-check-the-return-value-of-ioremap-in-lba_driver_probe.patch
