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bcachefs: Fix encryption path on arm

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flush_dcache_page() is not a noop on arm, but we were using
virt_to_page() instead of vmalloc_to_page() for an address on the kernel
stack - vmalloc memory, leading to an oops in flush_dcache_page().

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet
2022-05-23 22:37:01 -04:00
committed by Kent Overstreet
parent 232697ab9d
commit c346def9af
1 changed files with 6 additions and 1 deletions
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7
fs/bcachefs/checksum.c
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@@ -116,7 +116,12 @@ static inline int do_encrypt(struct crypto_sync_skcipher *tfm,
{
struct scatterlist sg;
sg_init_one(&sg, buf, len);
sg_init_table(&sg, 1);
sg_set_page(&sg,
is_vmalloc_addr(buf)
? vmalloc_to_page(buf)
: virt_to_page(buf),
len, offset_in_page(buf));
return do_encrypt_sg(tfm, nonce, &sg, len);
}