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authorSteven Rostedt (Google) <rostedt@goodmis.org>2023-11-21 18:10:07 -0500
committerSteven Rostedt (Google) <rostedt@goodmis.org>2023-11-22 18:37:33 -0500
commitf49f950c217bfb40f11662bab39cb388d41e4cfb (patch)
tree7f39b01dcb724c76bb060956d41f6fdc91efefbe /fs/tracefs
parentfc4561226feaad5fcdcb55646c348d77b8ee69c5 (diff)
eventfs: Make sure that parent->d_inode is locked in creating files/dirs
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/20231121231112.853962542@goodmis.org Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'fs/tracefs')
-rw-r--r--fs/tracefs/event_inode.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/tracefs/event_inode.c b/fs/tracefs/event_inode.c
index 590e8176449b..0b90869fd805 100644
--- a/fs/tracefs/event_inode.c
+++ b/fs/tracefs/event_inode.c
@@ -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);