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crypto: deflate - Make the acomp walk atomic

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Add an atomic flag to the acomp walk and use that in deflate.
Due to the use of a per-cpu context, it is impossible to sleep
during the walk in deflate.

Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202504151654.4c3b6393-lkp@intel.com
Fixes: 08cabc7d3c ("crypto: deflate - Convert to acomp")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2025-04-15 17:23:19 +08:00
parent 2f5f3cd003
commit ddd0855fa3
3 changed files with 5 additions and 5 deletions
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4
crypto/acompress.c
View file

@ -536,7 +536,7 @@ int acomp_walk_next_dst(struct acomp_walk *walk)
EXPORT_SYMBOL_GPL(acomp_walk_next_dst);
int acomp_walk_virt(struct acomp_walk *__restrict walk,
struct acomp_req *__restrict req)
struct acomp_req *__restrict req, bool atomic)
{
struct scatterlist *src = req->src;
struct scatterlist *dst = req->dst;
@ -548,7 +548,7 @@ int acomp_walk_virt(struct acomp_walk *__restrict walk,
return -EINVAL;
walk->flags = 0;
if ((req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP))
if ((req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) && !atomic)
walk->flags |= ACOMP_WALK_SLEEP;
if ((req->base.flags & CRYPTO_ACOMP_REQ_SRC_VIRT))
walk->flags |= ACOMP_WALK_SRC_LINEAR;

4
crypto/deflate.c
View file

@ -60,7 +60,7 @@ static int deflate_compress_one(struct acomp_req *req,
struct acomp_walk walk;
int ret;
ret = acomp_walk_virt(&walk, req);
ret = acomp_walk_virt(&walk, req, true);
if (ret)
return ret;
@ -140,7 +140,7 @@ static int deflate_decompress_one(struct acomp_req *req,
struct acomp_walk walk;
int ret;
ret = acomp_walk_virt(&walk, req);
ret = acomp_walk_virt(&walk, req, true);
if (ret)
return ret;

2
include/crypto/internal/acompress.h
View file

@ -208,7 +208,7 @@ void acomp_walk_done_dst(struct acomp_walk *walk, int used);
int acomp_walk_next_src(struct acomp_walk *walk);
int acomp_walk_next_dst(struct acomp_walk *walk);
int acomp_walk_virt(struct acomp_walk *__restrict walk,
struct acomp_req *__restrict req);
struct acomp_req *__restrict req, bool atomic);
static inline bool acomp_walk_more_src(const struct acomp_walk *walk, int cur)
{