Buildresult: powerpc-next/ppc6xx_defconfig/powerpc-gcc8 built on Dec 13 2018, 02:55
kisskb
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Status:
Failed
Date/Time:
Dec 13 2018, 02:55
Duration:
0:01:50.647956
Builder:
ka4
Revision:
powerpc/mm/hash: Handle user access of kernel address gracefully (
61a8426c92ba30d403a1f072e29d713184539cc1)
Target:
powerpc-next/ppc6xx_defconfig/powerpc-gcc8
Branch:
powerpc-next
Compiler:
powerpc-gcc8
(powerpc64-linux-gcc (GCC) 8.1.0)
Config:
ppc6xx_defconfig
(
download
)
Log:
Download original
Possible errors
include/linux/regset.h:295:4: error: 'memcpy' offset [-527, -529] is out of the bounds [0, 16] of object 'vrsave' with type 'union <anonymous>' [-Werror=array-bounds] include/linux/regset.h:270:4: error: 'memcpy' offset [-527, -529] is out of the bounds [0, 16] of object 'vrsave' with type 'union <anonymous>' [-Werror=array-bounds] cc1: all warnings being treated as errors make[3]: *** [scripts/Makefile.build:294: arch/powerpc/kernel/ptrace.o] Error 1 make[2]: *** [scripts/Makefile.build:518: arch/powerpc/kernel] Error 2 make[1]: *** [Makefile:1060: arch/powerpc] Error 2 make: *** [Makefile:152: sub-make] Error 2
Possible warnings (1)
include/sound/control.h:223:9: warning: 'speaker_vol' may be used uninitialized in this function [-Wmaybe-uninitialized]
Full Log
# git rev-parse -q --verify 61a8426c92ba30d403a1f072e29d713184539cc1^{commit} 61a8426c92ba30d403a1f072e29d713184539cc1 already have revision, skipping fetch # git checkout -q -f -B kisskb 61a8426c92ba30d403a1f072e29d713184539cc1 # git clean -qxdf # < git log -1 # commit 61a8426c92ba30d403a1f072e29d713184539cc1 # Author: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> # Date: Mon Nov 26 20:05:04 2018 +0530 # # powerpc/mm/hash: Handle user access of kernel address gracefully # # In commit 2865d08dd9ea ("powerpc/mm: Move the DSISR_PROTFAULT sanity # check") we moved the protection fault access check before the vma # lookup. That means we hit that WARN_ON when user space accesses a # kernel address. Before that commit this was handled by find_vma() not # finding vma for the kernel address and considering that access as bad # area access. # # Avoid the confusing WARN_ON and convert that to a ratelimited printk. # # With the patch we now get: # # for load: # a.out[5997]: User access of kernel address (c00000000000dea0) - exploit attempt? (uid: 1000) # a.out[5997]: segfault (11) at c00000000000dea0 nip 1317c0798 lr 7fff80d6441c code 1 in a.out[1317c0000+10000] # a.out[5997]: code: 60000000 60420000 3c4c0002 38427790 4bffff20 3c4c0002 38427784 fbe1fff8 # a.out[5997]: code: f821ffc1 7c3f0b78 60000000 e9228030 <89290000> 993f002f 60000000 383f0040 # # for exec: # a.out[6067]: User access of kernel address (c00000000000dea0) - exploit attempt? (uid: 1000) # a.out[6067]: segfault (11) at c00000000000dea0 nip c00000000000dea0 lr 129d507b0 code 1 # a.out[6067]: Bad NIP, not dumping instructions. # # Fixes: 2865d08dd9ea ("powerpc/mm: Move the DSISR_PROTFAULT sanity check") # Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> # Tested-by: Breno Leitao <leitao@debian.org> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < git log --format=%s --max-count=1 61a8426c92ba30d403a1f072e29d713184539cc1 # < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc6xx_defconfig_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux- ppc6xx_defconfig # make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc6xx_defconfig_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux- In file included from /kisskb/src/arch/powerpc/kernel/ptrace.c:24: In function 'user_regset_copyin', inlined from 'vr_set' at /kisskb/src/arch/powerpc/kernel/ptrace.c:619:9: /kisskb/src/include/linux/regset.h:295:4: error: 'memcpy' offset [-527, -529] is out of the bounds [0, 16] of object 'vrsave' with type 'union <anonymous>' [-Werror=array-bounds] memcpy(data, *kbuf, copy); ^~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/arch/powerpc/kernel/ptrace.c: In function 'vr_set': /kisskb/src/arch/powerpc/kernel/ptrace.c:614:5: note: 'vrsave' declared here } vrsave; ^~~~~~ In file included from /kisskb/src/arch/powerpc/kernel/ptrace.c:24: In function 'user_regset_copyout', inlined from 'vr_get' at /kisskb/src/arch/powerpc/kernel/ptrace.c:572:9: /kisskb/src/include/linux/regset.h:270:4: error: 'memcpy' offset [-527, -529] is out of the bounds [0, 16] of object 'vrsave' with type 'union <anonymous>' [-Werror=array-bounds] memcpy(*kbuf, data, copy); ^~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/arch/powerpc/kernel/ptrace.c: In function 'vr_get': /kisskb/src/arch/powerpc/kernel/ptrace.c:567:5: note: 'vrsave' declared here } vrsave; ^~~~~~ cc1: all warnings being treated as errors make[3]: *** [/kisskb/src/scripts/Makefile.build:294: arch/powerpc/kernel/ptrace.o] Error 1 make[3]: *** Waiting for unfinished jobs.... make[2]: *** [/kisskb/src/scripts/Makefile.build:518: arch/powerpc/kernel] Error 2 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [/kisskb/src/Makefile:1060: arch/powerpc] Error 2 make[1]: *** Waiting for unfinished jobs.... In file included from /kisskb/src/sound/ppc/pmac.h:25, from /kisskb/src/sound/ppc/awacs.c:29: /kisskb/src/sound/ppc/awacs.c: In function 'snd_pmac_awacs_init': /kisskb/src/include/sound/control.h:223:9: warning: 'speaker_vol' may be used uninitialized in this function [-Wmaybe-uninitialized] return _snd_ctl_add_slave(master, slave, 0); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/sound/ppc/awacs.c:886:36: note: 'speaker_vol' was declared here struct snd_kcontrol *master_vol, *speaker_vol; ^~~~~~~~~~~ make: *** [Makefile:152: sub-make] Error 2 Command 'make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc6xx_defconfig_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux- ' returned non-zero exit status 2 # rm -rf /kisskb/build/powerpc-next_ppc6xx_defconfig_powerpc-gcc8 # Build took: 0:01:50.647956
© Michael Ellerman 2006-2018.