Re: [PATCH 2/3] vfs: Fix implicit conversion problem when testing overflow case

[Christian Brauner <brauner@kernel.org>]

On Fri, 20 Sep 2024 20:28:51 +0800, Julian Sun wrote:
> The overflow check in generic_copy_file_checks() and generic_remap_checks()
> is now broken because the result of the addition is implicitly converted to
> an unsigned type, which disrupts the comparison with signed numbers.
> This caused the kernel to not return EOVERFLOW in copy_file_range()
> call with len is set to 0xffffffffa003e45bul.
> 
> Use the check_add_overflow() macro to fix this issue.
> 
> [...]

Applied to the vfs.misc.v6.13 branch of the vfs/vfs.git tree.
Patches in the vfs.misc.v6.13 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.v6.13

[2/3] vfs: Fix implicit conversion problem when testing overflow case
      https://git.kernel.org/vfs/vfs/c/8f3ab2511887