Buildresult: powerpc-fixes/s390-defconfig/s390x-gcc11 built on May 8 2022, 19:06

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Status:	OK
Date/Time:	May 8 2022, 19:06
Duration:	0:02:36.148419
Builder:	ka4
Revision:	powerpc/papr_scm: Fix buffer overflow issue with CONFIG_FORTIFY_SOURCE (`348c71344111d7a48892e3e52264ff11956fc196)`
Target:	powerpc-fixes/s390-defconfig/s390x-gcc11
Branch:	powerpc-fixes
Compiler:	s390x-gcc11 (s390-linux-gcc (GCC) 11.1.0 / GNU ld (GNU Binutils) 2.36.1)
Config:	defconfig (download)
Log:	Download original Possible warnings (1) arch/s390/kernel/machine_kexec.c:57:9: warning: 'memcpy' offset [0, 511] is out of the bounds [0, 0] [-Warray-bounds] Full Log # git rev-parse -q --verify 348c71344111d7a48892e3e52264ff11956fc196^{commit} 348c71344111d7a48892e3e52264ff11956fc196 already have revision, skipping fetch # git checkout -q -f -B kisskb 348c71344111d7a48892e3e52264ff11956fc196 # git clean -qxdf # < git log -1 # commit 348c71344111d7a48892e3e52264ff11956fc196 # Author: Kajol Jain <kjain@linux.ibm.com> # Date: Thu May 5 21:04:51 2022 +0530 # # powerpc/papr_scm: Fix buffer overflow issue with CONFIG_FORTIFY_SOURCE # # With CONFIG_FORTIFY_SOURCE enabled, string functions will also perform # dynamic checks for string size which can panic the kernel, like incase # of overflow detection. # # In papr_scm, papr_scm_pmu_check_events function uses stat->stat_id with # string operations, to populate the nvdimm_events_map array. Since # stat_id variable is not NULL terminated, the kernel panics with # CONFIG_FORTIFY_SOURCE enabled at boot time. # # Below are the logs of kernel panic: # # detected buffer overflow in __fortify_strlen # ------------[ cut here ]------------ # kernel BUG at lib/string_helpers.c:980! # Oops: Exception in kernel mode, sig: 5 [#1] # NIP [c00000000077dad0] fortify_panic+0x28/0x38 # LR [c00000000077dacc] fortify_panic+0x24/0x38 # Call Trace: # [c0000022d77836e0] [c00000000077dacc] fortify_panic+0x24/0x38 (unreliable) # [c00800000deb2660] papr_scm_pmu_check_events.constprop.0+0x118/0x220 [papr_scm] # [c00800000deb2cb0] papr_scm_probe+0x288/0x62c [papr_scm] # [c0000000009b46a8] platform_probe+0x98/0x150 # # Fix this issue by using kmemdup_nul() to copy the content of # stat->stat_id directly to the nvdimm_events_map array. # # mpe: stat->stat_id comes from the hypervisor, not userspace, so there is # no security exposure. # # Fixes: 4c08d4bbc089 ("powerpc/papr_scm: Add perf interface support") # Signed-off-by: Kajol Jain <kjain@linux.ibm.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/20220505153451.35503-1-kjain@linux.ibm.com # < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-ld --version # < git log --format=%s --max-count=1 348c71344111d7a48892e3e52264ff11956fc196 # < make -s -j 40 ARCH=s390 O=/kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux- defconfig # Added to kconfig CONFIG_DEBUG_INFO_BTF=n # Added to kconfig # < make -s -j 40 ARCH=s390 O=/kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux- help # make -s -j 40 ARCH=s390 O=/kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux- olddefconfig # make -s -j 40 ARCH=s390 O=/kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux- /kisskb/src/arch/s390/kernel/machine_kexec.c: In function '__do_machine_kdump': /kisskb/src/arch/s390/kernel/machine_kexec.c:57:9: warning: 'memcpy' offset [0, 511] is out of the bounds [0, 0] [-Warray-bounds] 57 \| memcpy((void ) __LC_FPREGS_SAVE_AREA, \| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 58 \| (void )(prefix + __LC_FPREGS_SAVE_AREA), 512); \| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Completed OK # rm -rf /kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc11 # Build took: 0:02:36.148419

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