Buildresult: powerpc-fixes/mmu_defconfig/microblaze-gcc5 built on Feb 17 2019, 15:47

kisskb

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Status:	Failed
Date/Time:	Feb 17 2019, 15:47
Duration:	0:00:03.659333
Builder:	ka2
Revision:	powerpc/64s: Fix possible corruption on big endian due to pgd/pud_present() (`c9459b03b9c4096165b9f0da5dde2e93fdaf17ba)`
Target:	powerpc-fixes/mmu_defconfig/microblaze-gcc5
Branch:	powerpc-fixes
Compiler:	microblaze-gcc5 (microblazeel-linux-gcc.br_real (Buildroot 2016.11-git-00613-ge98b4dd) 5.4.0 / GNU ld (GNU Binutils) 2.26.1)
Config:	mmu_defconfig (download)
Log:	Download original Possible errors include/linux/shm.h:8:26: fatal error: asm/shmparam.h: No such file or directory make[2]: * [scripts/Makefile.build:110: arch/microblaze/kernel/asm-offsets.s] Error 1 make[1]: * [Makefile:1092: prepare0] Error 2 make: * [Makefile:152: sub-make] Error 2 No warnings found in log. Full Log # git rev-parse -q --verify c9459b03b9c4096165b9f0da5dde2e93fdaf17ba^{commit} c9459b03b9c4096165b9f0da5dde2e93fdaf17ba already have revision, skipping fetch # git checkout -q -f -B kisskb c9459b03b9c4096165b9f0da5dde2e93fdaf17ba # git clean -qxdf # < git log -1 # commit c9459b03b9c4096165b9f0da5dde2e93fdaf17ba # Author: Michael Ellerman <mpe@ellerman.id.au> # Date: Thu Feb 14 15:00:36 2019 +1100 # # powerpc/64s: Fix possible corruption on big endian due to pgd/pud_present() # # In v4.20 we changed our pgd/pud_present() to check for _PAGE_PRESENT # rather than just checking that the value is non-zero, e.g.: # # static inline int pgd_present(pgd_t pgd) # { # - return !pgd_none(pgd); # + return (pgd_raw(pgd) & cpu_to_be64(_PAGE_PRESENT)); # } # # Unfortunately this is broken on big endian, as the result of the # bitwise && is truncated to int, which is always zero because # _PAGE_PRESENT is 0x8000000000000000ul. This means pgd_present() and # pud_present() are always false at compile time, and the compiler # elides the subsequent code. # # Remarkably with that bug present we are still able to boot and run # with few noticeable effects. However under some work loads we are able # to trigger a warning in the ext4 code: # # WARNING: CPU: 11 PID: 29593 at fs/ext4/inode.c:3927 .ext4_set_page_dirty+0x70/0xb0 # CPU: 11 PID: 29593 Comm: debugedit Not tainted 4.20.0-rc1 #1 # ... # NIP .ext4_set_page_dirty+0x70/0xb0 # LR .set_page_dirty+0xa0/0x150 # Call Trace: # .set_page_dirty+0xa0/0x150 # .unmap_page_range+0xbf0/0xe10 # .unmap_vmas+0x84/0x130 # .unmap_region+0xe8/0x190 # .__do_munmap+0x2f0/0x510 # .__vm_munmap+0x80/0x110 # .__se_sys_munmap+0x14/0x30 # system_call+0x5c/0x70 # # The fix is simple, we need to convert the result of the bitwise && to # an int before returning it. # # Thanks to Erhard, Jan Kara and Aneesh for help with debugging. # # Fixes: da7ad366b497 ("powerpc/mm/book3s: Update pmd_present to look at _PAGE_PRESENT bit") # Cc: stable@vger.kernel.org # v4.20+ # Reported-by: Erhard F. <erhard_f@mailbox.org> # Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-gcc --version # < /opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-ld --version # < git log --format=%s --max-count=1 c9459b03b9c4096165b9f0da5dde2e93fdaf17ba # < make -s -j 48 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux- mmu_defconfig # make -s -j 48 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux- In file included from /kisskb/src/include/linux/sched.h:16:0, from /kisskb/src/arch/microblaze/kernel/asm-offsets.c:13: /kisskb/src/include/linux/shm.h:8:26: fatal error: asm/shmparam.h: No such file or directory compilation terminated. make[2]: * [/kisskb/src/scripts/Makefile.build:110: arch/microblaze/kernel/asm-offsets.s] Error 1 make[1]: * [/kisskb/src/Makefile:1092: prepare0] Error 2 make: * [Makefile:152: sub-make] Error 2 Command 'make -s -j 48 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux- ' returned non-zero exit status 2 # rm -rf /kisskb/build/powerpc-fixes_mmu_defconfig_microblaze # Build took: 0:00:03.659333

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