Fedor Pchelkin 88f3869649 s390/pkey: Prevent overflow in size calculation for memdup_user() ... commit 7360ee4759 upstream. Number of apqn target list entries contained in 'nr_apqns' variable is determined by userspace via an ioctl call so the result of the product in calculation of size passed to memdup_user() may overflow. In this case the actual size of the allocated area and the value describing it won't be in sync leading to various types of unpredictable behaviour later. Use a proper memdup_array_user() helper which returns an error if an overflow is detected. Note that it is different from when nr_apqns is initially zero - that case is considered valid and should be handled in subsequent pkey_handler implementations. Found by Linux Verification Center (linuxtesting.org). Fixes: f2bbc96e7c ("s390/pkey: add CCA AES cipher key support") Cc: stable@vger.kernel.org Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru> Reviewed-by: Holger Dengler <dengler@linux.ibm.com> Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Link: https://lore.kernel.org/r/20250611192011.206057-1-pchelkin@ispras.ru Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-07-06 11:00:11 +02:00
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ap_bus.c
ap_bus.h
ap_card.c
ap_debug.h
ap_queue.c
Makefile
pkey_api.c
vfio_ap_debug.h
vfio_ap_drv.c
vfio_ap_ops.c
vfio_ap_private.h
zcrypt_api.c
zcrypt_api.h
zcrypt_card.c
zcrypt_cca_key.h
zcrypt_ccamisc.c
zcrypt_ccamisc.h
zcrypt_cex2a.c
zcrypt_cex2a.h
zcrypt_cex2c.c
zcrypt_cex2c.h
zcrypt_cex4.c
zcrypt_cex4.h
zcrypt_debug.h
zcrypt_ep11misc.c
zcrypt_ep11misc.h
zcrypt_error.h
zcrypt_msgtype6.c
zcrypt_msgtype6.h
zcrypt_msgtype50.c
zcrypt_msgtype50.h
zcrypt_queue.c