Buildresult: powerpc-fixes/pseries_defconfig+FA_DUMP/powerpc-gcc4.9 built on Jun 20 2021, 12:45

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Status:	OK
Date/Time:	Jun 20 2021, 12:45
Duration:	0:03:09.014329
Builder:	ka1
Revision:	powerpc/perf: Fix crash in perf_instruction_pointer() when ppmu is not set (`60b7ed54a41b550d50caf7f2418db4a7e75b5bdc)`
Target:	powerpc-fixes/pseries_defconfig+FA_DUMP/powerpc-gcc4.9
Branch:	powerpc-fixes
Compiler:	powerpc-gcc4.9 (powerpc64-linux-gcc (GCC) 4.9.4 / GNU ld (GNU Binutils) 2.29.1.20170915)
Config:	pseries_defconfig+FA_DUMP (download)
Log:	Download original Possible warnings (8) .config:4108:warning: override: reassigning to symbol CRASH_DUMP .config:4109:warning: override: reassigning to symbol FA_DUMP net/sched/sch_frag.c:93:10: warning: missing braces around initializer [-Wmissing-braces] net/sched/sch_frag.c:93:10: warning: (near initialization for 'sch_frag_rt.dst') [-Wmissing-braces] drivers/net/ethernet/chelsio/cxgb4/sge.c:910:9: warning: missing braces around initializer [-Wmissing-braces] drivers/net/ethernet/chelsio/cxgb4/sge.c:910:9: warning: (near initialization for 'buf[0]') [-Wmissing-braces] fs/btrfs/tree-checker.c:1071:9: warning: missing braces around initializer [-Wmissing-braces] fs/btrfs/tree-checker.c:1071:9: warning: (near initialization for 'ri.inode') [-Wmissing-braces] Full Log # git rev-parse -q --verify 60b7ed54a41b550d50caf7f2418db4a7e75b5bdc^{commit} 60b7ed54a41b550d50caf7f2418db4a7e75b5bdc already have revision, skipping fetch # git checkout -q -f -B kisskb 60b7ed54a41b550d50caf7f2418db4a7e75b5bdc # git clean -qxdf # < git log -1 # commit 60b7ed54a41b550d50caf7f2418db4a7e75b5bdc # Author: Athira Rajeev <atrajeev@linux.vnet.ibm.com> # Date: Thu Jun 17 13:55:06 2021 -0400 # # powerpc/perf: Fix crash in perf_instruction_pointer() when ppmu is not set # # On systems without any specific PMU driver support registered, running # perf record causes Oops. # # The relevant portion from call trace: # # BUG: Kernel NULL pointer dereference on read at 0x00000040 # Faulting instruction address: 0xc0021f0c # Oops: Kernel access of bad area, sig: 11 [#1] # BE PAGE_SIZE=4K PREEMPT CMPCPRO # SAF3000 DIE NOTIFICATION # CPU: 0 PID: 442 Comm: null_syscall Not tainted 5.13.0-rc6-s3k-dev-01645-g7649ee3d2957 #5164 # NIP: c0021f0c LR: c00e8ad8 CTR: c00d8a5c # NIP perf_instruction_pointer+0x10/0x60 # LR perf_prepare_sample+0x344/0x674 # Call Trace: # perf_prepare_sample+0x7c/0x674 (unreliable) # perf_event_output_forward+0x3c/0x94 # __perf_event_overflow+0x74/0x14c # perf_swevent_hrtimer+0xf8/0x170 # __hrtimer_run_queues.constprop.0+0x160/0x318 # hrtimer_interrupt+0x148/0x3b0 # timer_interrupt+0xc4/0x22c # Decrementer_virt+0xb8/0xbc # # During perf record session, perf_instruction_pointer() is called to # capture the sample IP. This function in core-book3s accesses # ppmu->flags. If a platform specific PMU driver is not registered, ppmu # is set to NULL and accessing its members results in a crash. Fix this # crash by checking if ppmu is set. # # Fixes: 2ca13a4cc56c ("powerpc/perf: Use regs->nip when SIAR is zero") # Cc: stable@vger.kernel.org # v5.11+ # Reported-by: Christophe Leroy <christophe.leroy@csgroup.eu> # Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com> # Tested-by: Christophe Leroy <christophe.leroy@csgroup.eu> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/1623952506-1431-1-git-send-email-atrajeev@linux.vnet.ibm.com # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 60b7ed54a41b550d50caf7f2418db4a7e75b5bdc # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+FA_DUMP_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- pseries_defconfig # Added to kconfig CONFIG_CRASH_DUMP=y # Added to kconfig CONFIG_FA_DUMP=y # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+FA_DUMP_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+FA_DUMP_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig .config:4108:warning: override: reassigning to symbol CRASH_DUMP .config:4109:warning: override: reassigning to symbol FA_DUMP # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+FA_DUMP_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/net/sched/sch_frag.c: In function 'sch_fragment': /kisskb/src/net/sched/sch_frag.c:93:10: warning: missing braces around initializer [-Wmissing-braces] struct rtable sch_frag_rt = { 0 }; ^ /kisskb/src/net/sched/sch_frag.c:93:10: warning: (near initialization for 'sch_frag_rt.dst') [-Wmissing-braces] /kisskb/src/drivers/net/ethernet/chelsio/cxgb4/sge.c: In function 'cxgb4_write_partial_sgl': /kisskb/src/drivers/net/ethernet/chelsio/cxgb4/sge.c:910:9: warning: missing braces around initializer [-Wmissing-braces] struct ulptx_sge_pair buf[MAX_SKB_FRAGS / 2 + 1] = {0}, *to; ^ /kisskb/src/drivers/net/ethernet/chelsio/cxgb4/sge.c:910:9: warning: (near initialization for 'buf[0]') [-Wmissing-braces] /kisskb/src/fs/btrfs/tree-checker.c: In function 'check_root_item': /kisskb/src/fs/btrfs/tree-checker.c:1071:9: warning: missing braces around initializer [-Wmissing-braces] struct btrfs_root_item ri = { 0 }; ^ /kisskb/src/fs/btrfs/tree-checker.c:1071:9: warning: (near initialization for 'ri.inode') [-Wmissing-braces] Completed OK # rm -rf /kisskb/build/powerpc-fixes_pseries_defconfig+FA_DUMP_powerpc-gcc4.9 # Build took: 0:03:09.014329

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