ovl: fix UAF in ovl_do_mkdir() debug print

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In the Linux kernel, the following vulnerability has been resolved: ovl: fix UAF in ovl_do_mkdir() debug print ovl_do_mkdir() prints the input dentry with %pd after vfs_mkdir(). Since commit fe497f0759e0 ("VFS: change vfs_mkdir() to unlock on failure."), vfs_mkdir() calls end_creating() on the input dentry on failure and may replace it on success, so the post-call %pd can use-after-free the dentry when CONFIG_OVERLAY_FS_DEBUG is enabled. Print the dentry before the call and only the result afterward.

Source published

23 Oct 2026 12:02:38 UTC

Source modified

23 Oct 2026 12:05:33 UTC

Observed here

23 Oct 2026 16:01:20 UTC

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