Re: [PATCH] fs: romfs: Fix potential uninitialized memory leak

[Christian Brauner]

On Thu, 18 Jan 2024 15:14:12 +0800, Fullway Wang wrote:
> romfs_dev_read() fetches a caller-supplied number of bytes from the
> backing device in an all-or-nothing manner.
> 
> Commit bcf85fc fixed CVE-2020-29371, which exposed the bug when
> the requested length crossed the filesystem size limit, the number
> of bytes to requested was truncated. However, in romfs_readdir()
> in super.c, the requested number is firstly truncated with
> romfs_dev_strnlen() then passed to romfs_dev_read(), leaving
> the bug exploitable still.
> 
> [...]

Applied to the vfs.misc branch of the vfs/vfs.git tree.
Patches in the vfs.misc branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs.misc

[1/1] fs: romfs: Fix potential uninitialized memory leak
      https://git.kernel.org/vfs/vfs/c/530041d36e37