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authorDominique Martinet <asmadeus@codewreck.org>2020-11-19 15:11:04 +0100
committerDominique Martinet <asmadeus@codewreck.org>2020-11-19 17:22:28 +0100
commit5bfe97d7382b5c1ec351c59a878e742c9fd73d38 (patch)
tree62f7f3d4153845588970d4906272879c31a2c829 /fs/9p
parentff5e72ebef41068789c93b0666cebde80cc8bd8c (diff)
9p: Fix writeback fid incorrectly being attached to dentry
v9fs_dir_release needs fid->ilist to have been initialized for filp's fid, not the inode's writeback fid's. With refcounting this can be improved on later but this appears to fix null deref issues. Link: http://lkml.kernel.org/r/1605802012-31133-3-git-send-email-asmadeus@codewreck.org Fixes: 6636b6dcc3db ("fs/9p: track open fids") Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Diffstat (limited to 'fs/9p')
-rw-r--r--fs/9p/vfs_file.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index b0ef225cecd0..c5e49c88688d 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -46,7 +46,7 @@ int v9fs_file_open(struct inode *inode, struct file *file)
int err;
struct v9fs_inode *v9inode;
struct v9fs_session_info *v9ses;
- struct p9_fid *fid;
+ struct p9_fid *fid, *writeback_fid;
int omode;
p9_debug(P9_DEBUG_VFS, "inode: %p file: %p\n", inode, file);
@@ -85,13 +85,13 @@ int v9fs_file_open(struct inode *inode, struct file *file)
* because we want write after unlink usecase
* to work.
*/
- fid = v9fs_writeback_fid(file_dentry(file));
+ writeback_fid = v9fs_writeback_fid(file_dentry(file));
if (IS_ERR(fid)) {
err = PTR_ERR(fid);
mutex_unlock(&v9inode->v_mutex);
goto out_error;
}
- v9inode->writeback_fid = (void *) fid;
+ v9inode->writeback_fid = (void *) writeback_fid;
}
mutex_unlock(&v9inode->v_mutex);
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)