From: Anand Jain <anand.jain@oracle.com>
To: stable@vger.kernel.org
Cc: linux-btrfs@vger.kernel.org,
Andreas Gruenbacher <agruenba@redhat.com>,
Anand Jain <anand.jain@oracle.com>
Subject: [PATCH 01/17 stable-5.15.y] powerpc/kvm: Fix kvm_use_magic_page
Date: Sat, 2 Apr 2022 18:25:38 +0800 [thread overview]
Message-ID: <77e3826f2e76b80da366e64395af36813d85ec36.1648636044.git.anand.jain@oracle.com> (raw)
In-Reply-To: <cover.1648636044.git.anand.jain@oracle.com>
From: Andreas Gruenbacher <agruenba@redhat.com>
commit 0c8eb2884a42d992c7726539328b7d3568f22143 upstream
When switching from __get_user to fault_in_pages_readable, commit
9f9eae5ce717 broke kvm_use_magic_page: like __get_user,
fault_in_pages_readable returns 0 on success.
Fixes: 9f9eae5ce717 ("powerpc/kvm: Prefer fault_in_pages_readable function")
Cc: stable@vger.kernel.org # v4.18+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
arch/powerpc/kernel/kvm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c
index 617eba82531c..d89cf802d9aa 100644
--- a/arch/powerpc/kernel/kvm.c
+++ b/arch/powerpc/kernel/kvm.c
@@ -669,7 +669,7 @@ static void __init kvm_use_magic_page(void)
on_each_cpu(kvm_map_magic_page, &features, 1);
/* Quick self-test to see if the mapping works */
- if (!fault_in_pages_readable((const char *)KVM_MAGIC_PAGE, sizeof(u32))) {
+ if (fault_in_pages_readable((const char *)KVM_MAGIC_PAGE, sizeof(u32))) {
kvm_patching_worked = false;
return;
}
--
2.33.1
next prev parent reply other threads:[~2022-04-02 10:26 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-02 10:25 [PATCH 00/17 stable-5.15.y] Fix mmap + page fault deadlocks Anand Jain
2022-04-02 10:25 ` Anand Jain [this message]
2022-04-02 10:25 ` [PATCH 02/17 stable-5.15.y] gup: Turn fault_in_pages_{readable,writeable} into fault_in_{readable,writeable} Anand Jain
2022-04-02 10:25 ` [PATCH 03/17 stable-5.15.y] iov_iter: Turn iov_iter_fault_in_readable into fault_in_iov_iter_readable Anand Jain
2022-04-02 10:25 ` [PATCH 04/17 stable-5.15.y] iov_iter: Introduce fault_in_iov_iter_writeable Anand Jain
2022-04-02 10:25 ` [PATCH 05/17 stable-5.15.y] gfs2: Add wrapper for iomap_file_buffered_write Anand Jain
2022-04-02 10:25 ` [PATCH 06/17 stable-5.15.y] gfs2: Clean up function may_grant Anand Jain
2022-04-02 10:25 ` [PATCH 07/17 stable-5.15.y] gfs2: Move the inode glock locking to gfs2_file_buffered_write Anand Jain
2022-04-02 10:25 ` [PATCH 08/17 stable-5.15.y] gfs2: Eliminate ip->i_gh Anand Jain
2022-04-02 10:25 ` [PATCH 09/17 stable-5.15.y] gfs2: Fix mmap + page fault deadlocks for buffered I/O Anand Jain
2022-04-02 10:25 ` [PATCH 10/17 stable-5.15.y] iomap: Fix iomap_dio_rw return value for user copies Anand Jain
2022-04-02 10:25 ` [PATCH 11/17 stable-5.15.y] iomap: Support partial direct I/O on user copy failures Anand Jain
2022-04-02 10:25 ` [PATCH 12/17 stable-5.15.y] iomap: Add done_before argument to iomap_dio_rw Anand Jain
2022-04-02 10:25 ` [PATCH 13/17 stable-5.15.y] gup: Introduce FOLL_NOFAULT flag to disable page faults Anand Jain
2022-04-02 10:25 ` [PATCH 14/17 stable-5.15.y] iov_iter: Introduce nofault " Anand Jain
2022-04-02 10:25 ` [PATCH 15/17 stable-5.15.y] gfs2: Fix mmap + page fault deadlocks for direct I/O Anand Jain
2022-04-02 10:25 ` [PATCH 16/17 stable-5.15.y] gfs2: Introduce flag for glock holder auto-demotion Anand Jain
2022-04-02 10:25 ` [PATCH 17/17 stable-5.15.y] btrfs: fix deadlock due to page faults during direct IO reads and writes Anand Jain
2022-04-04 9:41 ` [PATCH 00/17 stable-5.15.y] Fix mmap + page fault deadlocks Filipe Manana
2022-04-05 11:32 ` Anand Jain
2022-04-11 7:49 ` Greg KH
2022-04-12 5:14 ` Anand Jain
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