btrfs: send: Proactively round up to kmalloc bucket size

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Instead of discovering the kmalloc bucket size _after_ allocation, round
up proactively so the allocation is explicitly made for the full size,
allowing the compiler to correctly reason about the resulting size of
the buffer through the existing __alloc_size() hint.

Cc: Chris Mason <clm@fb.com>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: linux-btrfs@vger.kernel.org
Acked-by: David Sterba <dsterba@suse.com>
Link: https://lore.kernel.org/lkml/20220922133014.GI32411@suse.cz
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220923202822.2667581-8-keescook@chromium.org

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This commit is contained in:

Kees Cook 2022-09-23 13:28:13 -07:00

parent cd536db050

commit 905889bc6c

1 changed files with 6 additions and 5 deletions

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fs/btrfs/send.c

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