+ mm-revert-mm-shmem-fix-data-race-in-shmem_getattr.patch added to mm-hotfixes-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm: revert "mm: shmem: fix data-race in shmem_getattr()"
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     mm-revert-mm-shmem-fix-data-race-in-shmem_getattr.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-revert-mm-shmem-fix-data-race-in-shmem_getattr.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Andrew Morton <akpm@linux-foundation.org>
Subject: mm: revert "mm: shmem: fix data-race in shmem_getattr()"
Date: Fri Nov 15 04:57:24 PM PST 2024

Revert d949d1d14fa2 ("mm: shmem: fix data-race in shmem_getattr()") as
suggested by Chuck [1].  It is causing deadlocks when accessing tmpfs over
NFS.

Link: https://lkml.kernel.org/r/ZzdxKF39VEmXSSyN@tissot.1015granger.net [1]
Fixes: https://lkml.kernel.org/r/ZzdxKF39VEmXSSyN@tissot.1015granger.net
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jeongjun Park <aha310510@gmail.com>
Cc: Yu Zhao <yuzhao@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/shmem.c |    2 --
 1 file changed, 2 deletions(-)

--- a/mm/shmem.c~mm-revert-mm-shmem-fix-data-race-in-shmem_getattr
+++ a/mm/shmem.c
@@ -1166,9 +1166,7 @@ static int shmem_getattr(struct mnt_idma
 	stat->attributes_mask |= (STATX_ATTR_APPEND |
 			STATX_ATTR_IMMUTABLE |
 			STATX_ATTR_NODUMP);
-	inode_lock_shared(inode);
 	generic_fillattr(idmap, request_mask, inode, stat);
-	inode_unlock_shared(inode);
 
 	if (shmem_huge_global_enabled(inode, 0, 0, false, NULL, 0))
 		stat->blksize = HPAGE_PMD_SIZE;
_

Patches currently in -mm which might be from akpm@linux-foundation.org are

fs-proc-vmcorec-fix-warning-when-config_mmu=n.patch
mm-revert-mm-shmem-fix-data-race-in-shmem_getattr.patch