Buildresult: powerpc-fixes/s390-defconfig/s390x-gcc8 built on May 30 2020, 02:30

kisskb

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Status:	OK
Date/Time:	May 30 2020, 02:30
Duration:	0:05:32.792819
Builder:	blade4b
Revision:	powerpc/64s: Disable sanitisers for C syscall/interrupt entry/exit code (`2f26ed1764b42a8c40d9c48441c73a70d805decf)`
Target:	powerpc-fixes/s390-defconfig/s390x-gcc8
Branch:	powerpc-fixes
Compiler:	s390x-gcc8 (s390-linux-gcc (GCC) 8.1.0 / GNU ld (GNU Binutils) 2.30)
Config:	defconfig (download)
Log:	Download original Possible warnings (1) kernel/futex.c:1676:17: warning: 'oldval' may be used uninitialized in this function [-Wmaybe-uninitialized] Full Log # git rev-parse -q --verify 2f26ed1764b42a8c40d9c48441c73a70d805decf^{commit} 2f26ed1764b42a8c40d9c48441c73a70d805decf already have revision, skipping fetch # git checkout -q -f -B kisskb 2f26ed1764b42a8c40d9c48441c73a70d805decf # git clean -qxdf # < git log -1 # commit 2f26ed1764b42a8c40d9c48441c73a70d805decf # Author: Daniel Axtens <dja@axtens.net> # Date: Fri May 29 16:14:46 2020 +1000 # # powerpc/64s: Disable sanitisers for C syscall/interrupt entry/exit code # # syzkaller is picking up a bunch of crashes that look like this: # # Unrecoverable exception 380 at c00000000037ed60 (msr=8000000000001031) # Oops: Unrecoverable exception, sig: 6 [#1] # LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries # Modules linked in: # CPU: 0 PID: 874 Comm: syz-executor.0 Not tainted 5.7.0-rc7-syzkaller-00016-gb0c3ba31be3e #0 # NIP: c00000000037ed60 LR: c00000000004bac8 CTR: c000000000030990 # REGS: c0000000555a7230 TRAP: 0380 Not tainted (5.7.0-rc7-syzkaller-00016-gb0c3ba31be3e) # MSR: 8000000000001031 <SF,ME,IR,DR,LE> CR: 48222882 XER: 20000000 # CFAR: c00000000004bac4 IRQMASK: 0 # GPR00: c00000000004bb68 c0000000555a74c0 c0000000024b3500 0000000000000005 # GPR04: 0000000000000000 0000000000000000 c00000000004bb88 c008000000910000 # GPR08: 00000000000b0000 c00000000004bac8 0000000000016000 c000000002503500 # GPR12: c000000000030990 c000000003190000 00000000106a5898 00000000106a0000 # GPR16: 00000000106a5890 c000000007a92000 c000000008180e00 c000000007a8f700 # GPR20: c000000007a904b0 0000000010110000 c00000000259d318 5deadbeef0000100 # GPR24: 5deadbeef0000122 c000000078422700 c000000009ee88b8 c000000078422778 # GPR28: 0000000000000001 800000000280b033 0000000000000000 c0000000555a75a0 # NIP [c00000000037ed60] __sanitizer_cov_trace_pc+0x40/0x50 # LR [c00000000004bac8] interrupt_exit_kernel_prepare+0x118/0x310 # Call Trace: # [c0000000555a74c0] [c00000000004bb68] interrupt_exit_kernel_prepare+0x1b8/0x310 (unreliable) # [c0000000555a7530] [c00000000000f9a8] interrupt_return+0x118/0x1c0 # --- interrupt: 900 at __sanitizer_cov_trace_pc+0x0/0x50 # ...<random previous call chain>... # # This is caused by __sanitizer_cov_trace_pc() causing an SLB fault # after MSR[RI] has been cleared by __hard_EE_RI_disable(), which we # can not recover from. # # Do not instrument the new syscall/interrupt entry/exit code with KCOV, # GCOV or UBSAN. # # Reported-by: syzbot-ppc64 <ozlabsyz@au1.ibm.com> # Fixes: 68b34588e202 ("powerpc/64/sycall: Implement syscall entry/exit logic in C") # Signed-off-by: Daniel Axtens <dja@axtens.net> # Acked-by: Andrew Donnellan <ajd@linux.ibm.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-ld --version # < git log --format=%s --max-count=1 2f26ed1764b42a8c40d9c48441c73a70d805decf # < make -s -j 24 ARCH=s390 O=/kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux- defconfig # < make -s -j 24 ARCH=s390 O=/kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux- help # make -s -j 24 ARCH=s390 O=/kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux- olddefconfig # make -s -j 24 ARCH=s390 O=/kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux- /kisskb/src/kernel/futex.c: In function 'do_futex': /kisskb/src/kernel/futex.c:1676:17: warning: 'oldval' may be used uninitialized in this function [-Wmaybe-uninitialized] return oldval == cmparg; ~~~~~~~^~~~~~~~~ /kisskb/src/kernel/futex.c:1652:6: note: 'oldval' was declared here int oldval, ret; ^~~~~~ Completed OK # rm -rf /kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc8 # Build took: 0:05:32.792819

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