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eventfs: Fix failure path in eventfs_create_events_dir()

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commit 7e8ad67c9b5c11e990c320ed7e7563f2301672a7 upstream.

The failure path of allocating ei goes to a path that dereferences ei.
Add another label that skips over the ei dereferences to do the rest of
the clean up.

Link: https://lore.kernel.org/all/70e7bace-561c-95f-1117-706c2c220bc@inria.fr/
Link: https://lore.kernel.org/linux-trace-kernel/20231019204132.6662fef0@gandalf.local.home

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Fixes: 5790b1fb3d67 ("eventfs: Remove eventfs_file and just use eventfs_inode")
Reported-by: Julia Lawall <julia.lawall@inria.fr>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Steven Rostedt (Google) 2024-02-06 07:09:15 -05:00 committed by Greg Kroah-Hartman
parent 17e4e4d233
commit c99e5cfe77
1 changed files with 2 additions and 1 deletions
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3
fs/tracefs/event_inode.c
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@ -735,7 +735,7 @@ struct eventfs_inode *eventfs_create_events_dir(const char *name, struct dentry
ei = kzalloc(sizeof(*ei), GFP_KERNEL);
if (!ei)
goto fail;
goto fail_ei;
inode = tracefs_get_inode(dentry->d_sb);
if (unlikely(!inode))
@ -781,6 +781,7 @@ struct eventfs_inode *eventfs_create_events_dir(const char *name, struct dentry
fail:
kfree(ei->d_children);
kfree(ei);
fail_ei:
tracefs_failed_creating(dentry);
return ERR_PTR(-ENOMEM);
}