Here's the KASAN report: BUG: KASAN: use-after-free in rsa_pub_done+0x70/0xe8 Read of size 1 at addr ffff00002267b614 by task swapper/0/0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-00165-ga85dda9-dirty #21 Hardware name: LS1046A RDB Board (DT) Call trace: dump_backtrace+0x0/0x260 show_stack+0x14/0x20 dump_stack+0xe8/0x144 print_address_description.isra.11+0x64/0x348 __kasan_report+0x11c/0x230 kasan_report+0xc/0x18 __asan_load1+0x5c/0x68 rsa_pub_done+0x70/0xe8 caam_jr_dequeue+0x390/0x608 tasklet_action_common.isra.13+0x1ec/0x230 ... Fixes: bf53795025a2 ("crypto: caam - add crypto_engine support for RSA algorithms") Signed-off-by: Iuliana Prodan <iuliana.prodan@xxxxxxx> --- drivers/crypto/caam/caampkc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c index 4fcae37..59cc7116 100644 --- a/drivers/crypto/caam/caampkc.c +++ b/drivers/crypto/caam/caampkc.c @@ -129,7 +129,6 @@ static void rsa_pub_done(struct device *dev, u32 *desc, u32 err, void *context) rsa_pub_unmap(dev, edesc, req); rsa_io_unmap(dev, edesc, req); - kfree(edesc); /* * If no backlog flag, the completion of the request is done @@ -139,6 +138,8 @@ static void rsa_pub_done(struct device *dev, u32 *desc, u32 err, void *context) akcipher_request_complete(req, ecode); else crypto_finalize_akcipher_request(jrp->engine, req, ecode); + + kfree(edesc); } static void rsa_priv_f_done(struct device *dev, u32 *desc, u32 err, @@ -170,7 +171,6 @@ static void rsa_priv_f_done(struct device *dev, u32 *desc, u32 err, } rsa_io_unmap(dev, edesc, req); - kfree(edesc); /* * If no backlog flag, the completion of the request is done @@ -180,6 +180,8 @@ static void rsa_priv_f_done(struct device *dev, u32 *desc, u32 err, akcipher_request_complete(req, ecode); else crypto_finalize_akcipher_request(jrp->engine, req, ecode); + + kfree(edesc); } /** -- 2.1.0