6.6-stable review patch. If anyone has any objections, please let me know.
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From: "Steven Rostedt (Google)" rostedt@goodmis.org
commit 77bc4d4921bd3497678ba8e7f4e480de35692f05 upstream.
The creation of the top events directory does a dget() at the end of the creation in eventfs_create_events_dir() with a comment saying the final dput() will happen when it is removed. The problem is that a dget() is already done on the dentry when it was created with tracefs_start_creating()! The dget() now just causes a memory leak of that dentry.
Remove the extra dget() as the final dput() in the deletion of the events directory actually matches the one in tracefs_start_creating().
Link: https://lore.kernel.org/linux-trace-kernel/20231031124229.4f2e3fa1@gandalf.l...
Cc: Masami Hiramatsu mhiramat@kernel.org Cc: Mark Rutland mark.rutland@arm.com Fixes: 5790b1fb3d672 ("eventfs: Remove eventfs_file and just use eventfs_inode") Signed-off-by: Steven Rostedt (Google) rostedt@goodmis.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/tracefs/event_inode.c | 3 --- 1 file changed, 3 deletions(-)
--- a/fs/tracefs/event_inode.c +++ b/fs/tracefs/event_inode.c @@ -774,9 +774,6 @@ struct eventfs_inode *eventfs_create_eve fsnotify_mkdir(dentry->d_parent->d_inode, dentry); tracefs_end_creating(dentry);
- /* Will call dput when the directory is removed */ - dget(dentry); - return ei;
fail: