# git rev-parse -q --verify 573ae4f13f630d6660008f1974c0a8a29c30e18a^{commit} 573ae4f13f630d6660008f1974c0a8a29c30e18a already have revision, skipping fetch # git checkout -q -f -B kisskb 573ae4f13f630d6660008f1974c0a8a29c30e18a # git clean -qxdf # < git log -1 # commit 573ae4f13f630d6660008f1974c0a8a29c30e18a # Author: Jens Wiklander # Date: Thu Aug 18 13:08:59 2022 +0200 # # tee: add overflow check in register_shm_helper() # # With special lengths supplied by user space, register_shm_helper() has # an integer overflow when calculating the number of pages covered by a # supplied user space memory region. # # This causes internal_get_user_pages_fast() a helper function of # pin_user_pages_fast() to do a NULL pointer dereference: # # Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 # Modules linked in: # CPU: 1 PID: 173 Comm: optee_example_a Not tainted 5.19.0 #11 # Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 # pc : internal_get_user_pages_fast+0x474/0xa80 # Call trace: # internal_get_user_pages_fast+0x474/0xa80 # pin_user_pages_fast+0x24/0x4c # register_shm_helper+0x194/0x330 # tee_shm_register_user_buf+0x78/0x120 # tee_ioctl+0xd0/0x11a0 # __arm64_sys_ioctl+0xa8/0xec # invoke_syscall+0x48/0x114 # # Fix this by adding an an explicit call to access_ok() in # tee_shm_register_user_buf() to catch an invalid user space address # early. # # Fixes: 033ddf12bcf5 ("tee: add register user memory") # Cc: stable@vger.kernel.org # Reported-by: Nimish Mishra # Reported-by: Anirban Chakraborty # Reported-by: Debdeep Mukhopadhyay # Suggested-by: Jerome Forissier # Signed-off-by: Jens Wiklander # Signed-off-by: Linus Torvalds # < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-gcc --version # < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-ld --version # < git log --format=%s --max-count=1 573ae4f13f630d6660008f1974c0a8a29c30e18a # < make -s -j 120 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 allmodconfig # Added to kconfig CONFIG_STANDALONE=y # Added to kconfig CONFIG_KCOV=n # Added to kconfig CONFIG_GCC_PLUGINS=n # Added to kconfig CONFIG_GCC_PLUGIN_CYC_COMPLEXITY=n # Added to kconfig CONFIG_GCC_PLUGIN_SANCOV=n # Added to kconfig CONFIG_GCC_PLUGIN_LATENT_ENTROPY=n # Added to kconfig CONFIG_GCC_PLUGIN_STRUCTLEAK=n # Added to kconfig CONFIG_GCC_PLUGIN_RANDSTRUCT=n # Added to kconfig CONFIG_UML_NET=n # Added to kconfig CONFIG_UML_NET_ETHERTAP=n # Added to kconfig CONFIG_UML_NET_TUNTAP=n # Added to kconfig CONFIG_UML_NET_SLIP=n # Added to kconfig CONFIG_UML_NET_DAEMON=n # Added to kconfig CONFIG_UML_NET_VDE=n # Added to kconfig CONFIG_UML_NET_MCAST=n # Added to kconfig CONFIG_UML_NET_PCAP=n # Added to kconfig CONFIG_UML_NET_SLIRP=n # Added to kconfig CONFIG_GCOV_KERNEL=n # Added to kconfig CONFIG_DEBUG_INFO_BTF=n # Added to kconfig CONFIG_BPF_PRELOAD=n # < make -s -j 120 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 help # make -s -j 120 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 olddefconfig .config:12451:warning: override: reassigning to symbol GCC_PLUGIN_SANCOV .config:12456:warning: override: reassigning to symbol UML_NET_ETHERTAP .config:12458:warning: override: reassigning to symbol UML_NET_SLIP .config:12461:warning: override: reassigning to symbol UML_NET_MCAST .config:12463:warning: override: reassigning to symbol UML_NET_SLIRP # make -s -j 120 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 /kisskb/src/arch/um/os-Linux/util.c:17:24: fatal error: sys/random.h: No such file or directory compilation terminated. make[2]: *** [/kisskb/src/scripts/Makefile.build:249: arch/um/os-Linux/util.o] Error 1 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [/kisskb/src/Makefile:1855: arch/um/os-Linux] Error 2 make[1]: *** Waiting for unfinished jobs.... make: *** [Makefile:222: __sub-make] Error 2 Command 'make -s -j 120 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 ' returned non-zero exit status 2 # rm -rf /kisskb/build/linus_um-allmodconfig_um-x86_64 # Build took: 0:00:53.840459