In the Linux kernel, the following vulnerability has been resolved:

sysfs: don't remove existing directory on update failure

When sysfs_update_group() is called for a named group and create_files()
fails (e.g. -ENOMEM), internal_create_group() calls kernfs_remove(kn) on
the group directory.  In the update path, kn was obtained via
kernfs_find_and_get() and refers to a directory that already existed
before this call.  Removing it silently destroys a sysfs group that the
caller did not create.

Only remove the directory if we created it ourselves.  On update failure
the directory remains as it is left empty by remove_files() inside
create_files(), but can be repopulated by a retry.

https://git.kernel.org/stable/c/14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8a

https://git.kernel.org/stable/c/237557b8a81ab948e8332f7c0058e758f081c0a3

https://git.kernel.org/stable/c/31527d80234caf83dc96ad478645e57df9de4472

https://git.kernel.org/stable/c/48fa96538bd2868034d33429e4565fda384d0736

https://git.kernel.org/stable/c/57b285e0368290aa55f79ba11419b96d0ebdb418

https://git.kernel.org/stable/c/708f6926f61f71e09b5e9fd668b9882ccd46e69f

https://git.kernel.org/stable/c/c5e125c828b701afaf7493b42a14aa89362ff36d

https://git.kernel.org/stable/c/ccadd32cc1263802a5969c9efe0e96225450428c

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