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eventfs: Make sure that parent->d_inode is locked in creating files/dirs

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Since the locking of the parent->d_inode has been moved outside the
creation of the files and directories (as it use to be locked via a
conditional), add a WARN_ON_ONCE() to the case that it's not locked.

Link: https://lkml.kernel.org/r/[email protected]

Cc: Masami Hiramatsu <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Andrew Morton <[email protected]>
Reviewed-by: Josef Bacik <[email protected]>
Signed-off-by: Steven Rostedt (Google) <[email protected]>
This commit is contained in:
Steven Rostedt (Google)
2023-11-22 18:37:33 -05:00
parent fc4561226f
commit f49f950c21
1 changed files with 4 additions and 0 deletions
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fs/tracefs/event_inode.c
+4
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@@ -327,6 +327,8 @@ create_file_dentry(struct eventfs_inode *ei, int idx,
struct dentry **e_dentry = &ei->d_children[idx];
struct dentry *dentry;
WARN_ON_ONCE(!inode_is_locked(parent->d_inode));
mutex_lock(&eventfs_mutex);
if (ei->is_freed) {
mutex_unlock(&eventfs_mutex);
@@ -430,6 +432,8 @@ create_dir_dentry(struct eventfs_inode *pei, struct eventfs_inode *ei,
{
struct dentry *dentry = NULL;
WARN_ON_ONCE(!inode_is_locked(parent->d_inode));
mutex_lock(&eventfs_mutex);
if (pei->is_freed || ei->is_freed) {
mutex_unlock(&eventfs_mutex);