The patch titled
Subject: fs/procfs: improve PROCMAP_QUERY's compat mode handling
has been added to the -mm mm-unstable branch. Its filename is
fs-procfs-implement-efficient-vma-querying-api-for-proc-pid-maps-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/fs-procfs-implement-efficient-vma-querying-api-for-proc-pid-maps-fix.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Andrii Nakryiko <andrii@xxxxxxxxxx>
Subject: fs/procfs: improve PROCMAP_QUERY's compat mode handling
Date: Mon, 1 Jul 2024 10:48:05 -0700
Kernel provides compat_ptr_ioctl() wrapper to sanitize pointers for 32-bit
processes on 64-bit host architectures. Given procfs_procmap_ioctl()
always expects pointer argument, this is exactly what we need.
This has any effect only on 32-bit processes on s390 architecture.
Link: https://lkml.kernel.org/r/20240701174805.1897344-2-andrii@xxxxxxxxxx
Fixes: 3757be498749 ("fs/procfs: implement efficient VMA querying API for /proc/<pid>/maps")
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
Suggested-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/proc/task_mmu.c~fs-procfs-implement-efficient-vma-querying-api-for-proc-pid-maps-fix
+++ a/fs/proc/task_mmu.c
@@ -614,7 +614,7 @@ const struct file_operations proc_pid_ma
.llseek = seq_lseek,
.release = proc_map_release,
.unlocked_ioctl = procfs_procmap_ioctl,
- .compat_ioctl = procfs_procmap_ioctl,
+ .compat_ioctl = compat_ptr_ioctl,
};
/*
_
Patches currently in -mm which might be from andrii@xxxxxxxxxx are
fs-procfs-extract-logic-for-getting-vma-name-constituents.patch
fs-procfs-implement-efficient-vma-querying-api-for-proc-pid-maps.patch
fs-procfs-implement-efficient-vma-querying-api-for-proc-pid-maps-fix.patch
fs-procfs-add-build-id-fetching-to-procmap_query-api.patch
fs-procfs-add-build-id-fetching-to-procmap_query-api-fix.patch
docs-procfs-call-out-ioctl-based-procmap_query-command-existence.patch
tools-sync-uapi-linux-fsh-header-into-tools-subdir.patch
selftests-proc-add-procmap_query-ioctl-tests.patch
