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lockd: use locks_inode_context helper

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[ Upstream commit 98b41ffe0afdfeaa1439a5d6bd2db4a94277e31b ]

lockd currently doesn't access i_flctx safely. This requires a
smp_load_acquire, as the pointer is set via cmpxchg (a release
operation).

Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Anna Schumaker <anna@kernel.org>
Cc: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jeff Layton 2022-11-16 09:19:43 -05:00 committed by Greg Kroah-Hartman
parent 1f76cb66ff
commit c66f9f22e6
1 changed files with 2 additions and 2 deletions
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4
fs/lockd/svcsubs.c
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@ -210,7 +210,7 @@ nlm_traverse_locks(struct nlm_host *host, struct nlm_file *file,
{
struct inode *inode = nlmsvc_file_inode(file);
struct file_lock *fl;
struct file_lock_context *flctx = inode->i_flctx;
struct file_lock_context *flctx = locks_inode_context(inode);
struct nlm_host *lockhost;
if (!flctx || list_empty_careful(&flctx->flc_posix))
@ -265,7 +265,7 @@ nlm_file_inuse(struct nlm_file *file)
{
struct inode *inode = nlmsvc_file_inode(file);
struct file_lock *fl;
struct file_lock_context *flctx = inode->i_flctx;
struct file_lock_context *flctx = locks_inode_context(inode);
if (file->f_count || !list_empty(&file->f_blocks) || file->f_shares)
return 1;