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| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2021-05-12 06:41:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-20 17:17:52 +0300 |
| commit | 34002b9fe988ee54b6556b7bdbde4e7232df9929 (patch) | |
| tree | ece06cc14f8c45f20f7aa8530dc1ade3a117f9c3 /fs/nfs | |
| parent | 5962368a970b978906f25c291251e4d27e5952fd (diff) | |
| download | linux-34002b9fe988ee54b6556b7bdbde4e7232df9929.tar.xz | |
NFS: nfs_find_open_context() may only select open files
[ Upstream commit e97bc66377bca097e1f3349ca18ca17f202ff659 ]
If a file has already been closed, then it should not be selected to
support further I/O.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
[Trond: Fix an invalid pointer deref reported by Colin Ian King]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/inode.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 33cc69687792..ad01d4fb795e 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -972,6 +972,7 @@ EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) { filp->private_data = get_nfs_open_context(ctx); + set_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags); if (list_empty(&ctx->list)) nfs_inode_attach_open_context(ctx); } @@ -991,6 +992,8 @@ struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_c continue; if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) continue; + if (!test_bit(NFS_CONTEXT_FILE_OPEN, &pos->flags)) + continue; ctx = get_nfs_open_context(pos); break; } @@ -1005,6 +1008,7 @@ void nfs_file_clear_open_context(struct file *filp) if (ctx) { struct inode *inode = d_inode(ctx->dentry); + clear_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags); /* * We fatal error on write before. Try to writeback * every page again. |