# git rev-parse -q --verify 21f8b2fa3ca5b01f7a2b51b89ce97a3705a15aa0^{commit} 21f8b2fa3ca5b01f7a2b51b89ce97a3705a15aa0 already have revision, skipping fetch # git checkout -q -f -B kisskb 21f8b2fa3ca5b01f7a2b51b89ce97a3705a15aa0 # git clean -qxdf # < git log -1 # commit 21f8b2fa3ca5b01f7a2b51b89ce97a3705a15aa0 # Author: Christophe Leroy # Date: Tue Feb 18 19:38:27 2020 +0000 # # powerpc/kprobes: Ignore traps that happened in real mode # # When a program check exception happens while MMU translation is # disabled, following Oops happens in kprobe_handler() in the following # code: # # } else if (*addr != BREAKPOINT_INSTRUCTION) { # # BUG: Unable to handle kernel data access on read at 0x0000e268 # Faulting instruction address: 0xc000ec34 # Oops: Kernel access of bad area, sig: 11 [#1] # BE PAGE_SIZE=16K PREEMPT CMPC885 # Modules linked in: # CPU: 0 PID: 429 Comm: cat Not tainted 5.6.0-rc1-s3k-dev-00824-g84195dc6c58a #3267 # NIP: c000ec34 LR: c000ecd8 CTR: c019cab8 # REGS: ca4d3b58 TRAP: 0300 Not tainted (5.6.0-rc1-s3k-dev-00824-g84195dc6c58a) # MSR: 00001032 CR: 2a4d3c52 XER: 00000000 # DAR: 0000e268 DSISR: c0000000 # GPR00: c000b09c ca4d3c10 c66d0620 00000000 ca4d3c60 00000000 00009032 00000000 # GPR08: 00020000 00000000 c087de44 c000afe0 c66d0ad0 100d3dd6 fffffff3 00000000 # GPR16: 00000000 00000041 00000000 ca4d3d70 00000000 00000000 0000416d 00000000 # GPR24: 00000004 c53b6128 00000000 0000e268 00000000 c07c0000 c07bb6fc ca4d3c60 # NIP [c000ec34] kprobe_handler+0x128/0x290 # LR [c000ecd8] kprobe_handler+0x1cc/0x290 # Call Trace: # [ca4d3c30] [c000b09c] program_check_exception+0xbc/0x6fc # [ca4d3c50] [c000e43c] ret_from_except_full+0x0/0x4 # --- interrupt: 700 at 0xe268 # Instruction dump: # 913e0008 81220000 38600001 3929ffff 91220000 80010024 bb410008 7c0803a6 # 38210020 4e800020 38600000 4e800020 <813b0000> 6d2a7fe0 2f8a0008 419e0154 # ---[ end trace 5b9152d4cdadd06d ]--- # # kprobe is not prepared to handle events in real mode and functions # running in real mode should have been blacklisted, so kprobe_handler() # can safely bail out telling 'this trap is not mine' for any trap that # happened while in real-mode. # # If the trap happened with MSR_IR or MSR_DR cleared, return 0 # immediately. # # Reported-by: Larry Finger # Fixes: 6cc89bad60a6 ("powerpc/kprobes: Invoke handlers directly") # Cc: stable@vger.kernel.org # v4.10+ # Signed-off-by: Christophe Leroy # Reviewed-by: Masami Hiramatsu # Reviewed-by: Naveen N. Rao # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/424331e2006e7291a1bfe40e7f3fa58825f565e1.1582054578.git.christophe.leroy@c-s.fr # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version # < git log --format=%s --max-count=1 21f8b2fa3ca5b01f7a2b51b89ce97a3705a15aa0 # < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- randconfig KCONFIG_SEED=0x3114D4B1 # Added to kconfig CONFIG_STANDALONE=y # Added to kconfig CONFIG_BUILD_DOCSRC=n # Added to kconfig CONFIG_MODULE_SIG=n # Added to kconfig CONFIG_CPU_BIG_ENDIAN=y # Added to kconfig CONFIG_PPC64=y # Added to kconfig CONFIG_PPC_DISABLE_WERROR=y # Added to kconfig CONFIG_SECTION_MISMATCH_WARN_ONLY=y # Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y # Added to kconfig CONFIG_CC_STACKPROTECTOR_STRONG=n # Added to kconfig CONFIG_GCC_PLUGINS=n # Added to kconfig CONFIG_LD_HEAD_STUB_CATCH=y # Added to kconfig CONFIG_TRIM_UNUSED_KSYMS=n # Added to kconfig CONFIG_UBSAN=n # < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- help # make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- olddefconfig .config:4798:warning: override: reassigning to symbol STANDALONE .config:4802:warning: override: reassigning to symbol PPC64 .config:4805:warning: override: reassigning to symbol PREVENT_FIRMWARE_BUILD # make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/ipc/shm.c: In function 'ksys_shmdt': /kisskb/src/ipc/shm.c:1712:59: warning: 'file' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/mm/ksm.c: In function 'stable_node_dup': /kisskb/src/mm/ksm.c:1391:15: warning: 'found_rmap_hlist_len' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:72:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:338:21: note: 'pdeo' was declared here /kisskb/src/net/core/gen_stats.c: In function '__gnet_stats_copy_basic': /kisskb/src/net/core/gen_stats.c:156:19: warning: 'seq' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/core/dev.c: In function 'validate_xmit_skb_list': /kisskb/src/net/core/dev.c:3597:15: warning: 'tail' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/mpi/mpicoder.c: In function 'mpi_read_raw_from_sgl': /kisskb/src/lib/mpi/mpicoder.c:352:8: warning: 'buff' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'serial_unlink_irq_chain': /kisskb/src/drivers/tty/serial/8250/8250_core.c:243:2: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/scheduler/sched_main.c: In function 'drm_sched_resubmit_jobs': /kisskb/src/drivers/gpu/drm/scheduler/sched_main.c:524:20: warning: 'guilty_context' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/bpf/btf.c: In function '__btf_resolve_helper_id': /kisskb/src/kernel/bpf/btf.c:4002:20: warning: 't' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/rhashtable.c: In function 'rhashtable_rehash_one.isra.24': /kisskb/src/include/linux/rhashtable.h:110:10: warning: 'next' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/rhashtable.c:222:28: note: 'next' was declared here /kisskb/src/fs/cifs/smb2pdu.c: In function 'SMB2_ioctl_init': /kisskb/src/fs/cifs/smb2pdu.c:2844:19: warning: 'in_data_buf' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc': /kisskb/src/fs/nfsd/nfs4xdr.c:2151:9: warning: 'str' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/nfsd/nfs4xdr.c:2156:11: warning: 'end' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/misc/cxl/native.c: In function 'native_irq_wait': /kisskb/src/drivers/misc/cxl/native.c:1244:2: warning: 'ph' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/misc/cxl/native.c:1244:2: warning: 'dsisr' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/afs/dynroot.c: In function 'afs_lookup_atcell': /kisskb/src/fs/afs/dynroot.c:117:6: warning: 'len' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/f2fs/node.c: In function '__set_nat_cache_dirty': /kisskb/src/fs/f2fs/node.c:263:17: warning: 'head' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/splice.c: In function '__do_compat_sys_vmsplice': /kisskb/src/fs/splice.c:1416:8: warning: 'type' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/splice.c: In function '__do_sys_vmsplice': /kisskb/src/fs/splice.c:1390:8: warning: 'type' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/ocfs2/alloc.c: In function 'ocfs2_trim_mainbm': /kisskb/src/fs/ocfs2/alloc.c:7608:17: warning: 'first_bit' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/nvme/target/io-cmd-bdev.c: In function 'nvmet_bdev_execute_discard': /kisskb/src/drivers/nvme/target/io-cmd-bdev.c:277:21: warning: 'status' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/target/target_core_user.c: In function 'scatter_data_area': /kisskb/src/drivers/target/target_core_user.c:653:29: warning: 'dbi' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/target/target_core_user.c:667:9: note: 'dbi' was declared here In file included from /kisskb/src/drivers/rtc/rtc-da9052.c:16:0: /kisskb/src/include/linux/mfd/da9052/da9052.h: In function 'da9052_group_read': /kisskb/src/include/linux/mfd/da9052/da9052.h:143:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/tipc/socket.c: In function 'tipc_recvmsg': /kisskb/src/net/tipc/socket.c:1828:27: warning: 'copy' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/sctp/output.c: In function 'sctp_packet_config': /kisskb/src/include/net/sock.h:1954:19: warning: 'sk' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/sctp/output.c:79:15: note: 'sk' was declared here /kisskb/src/drivers/md/raid10.c: In function 'read_balance': /kisskb/src/drivers/md/raid10.c:842:22: warning: 'best_pending_slot' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/hwspinlock/hwspinlock_core.c: In function 'of_hwspin_lock_get_id': /kisskb/src/drivers/hwspinlock/hwspinlock_core.c:345:6: warning: 'id' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c: In function 'drm_dp_mst_dsc_aux_for_port': /kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c:5400:9: warning: missing braces around initializer [-Wmissing-braces] /kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c:5400:9: warning: (near initialization for 'desc.ident') [-Wmissing-braces] /kisskb/src/drivers/gpu/drm/drm_atomic.c: In function 'drm_atomic_connector_check': /kisskb/src/drivers/gpu/drm/drm_atomic.c:426:38: warning: 'crtc_state' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c: In function 'amdgpu_dm_psr_enable': /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:8407:9: warning: missing braces around initializer [-Wmissing-braces] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:8407:9: warning: (near initialization for 'params.triggers') [-Wmissing-braces] /kisskb/src/drivers/infiniband/sw/siw/siw_qp_rx.c: In function 'siw_rqe_get': /kisskb/src/include/linux/spinlock.h:393:2: warning: 'flags' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/infiniband/sw/siw/siw_qp_rx.c:335:16: note: 'flags' was declared here /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/bios_parser2.c: In function 'bios_parser_get_i2c_info': /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/bios_parser2.c:297:9: warning: missing braces around initializer [-Wmissing-braces] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/bios_parser2.c:297:9: warning: (near initialization for 'dummy_record.record_header') [-Wmissing-braces] /kisskb/src/drivers/iio/pressure/dlhl60d.c: In function 'dlh_read_raw': /kisskb/src/drivers/iio/pressure/dlhl60d.c:166:11: warning: 'temperature' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/iio/pressure/dlhl60d.c:162:11: warning: 'pressure' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table2.c: In function 'encoder_control_dmcub': /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table2.c:116:9: warning: missing braces around initializer [-Wmissing-braces] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table2.c:116:9: warning: (near initialization for 'encoder_control.header') [-Wmissing-braces] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table2.c: In function 'set_pixel_clock_dmcub': /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table2.c:342:9: warning: missing braces around initializer [-Wmissing-braces] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table2.c:342:9: warning: (near initialization for 'pixel_clock.header') [-Wmissing-braces] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c: In function 'dcn_bw_apply_registry_override': /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:626:2: error: implicit declaration of function 'enable_kernel_vsx' [-Werror=implicit-function-declaration] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:626:2: error: implicit declaration of function 'enable_kernel_altivec' [-Werror=implicit-function-declaration] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:662:2: error: implicit declaration of function 'disable_kernel_vsx' [-Werror=implicit-function-declaration] /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:662:2: error: implicit declaration of function 'disable_kernel_altivec' [-Werror=implicit-function-declaration] cc1: some warnings being treated as errors make[5]: *** [/kisskb/src/scripts/Makefile.build:267: drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.o] Error 1 make[5]: *** Waiting for unfinished jobs.... /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxg94.c: In function 'g94_i2c_aux_xfer': /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxg94.c:160:31: warning: 'stat' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm200.c: In function 'gm200_i2c_aux_xfer': /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm200.c:160:31: warning: 'stat' may be used uninitialized in this function [-Wuninitialized] make[4]: *** [/kisskb/src/scripts/Makefile.build:505: drivers/gpu/drm/amd/amdgpu] Error 2 make[4]: *** Waiting for unfinished jobs.... /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c: In function 'gk104_top_oneinit': /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c:104:1: warning: 'inst' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c:104:1: warning: 'type' may be used uninitialized in this function [-Wuninitialized] make[3]: *** [/kisskb/src/scripts/Makefile.build:505: drivers/gpu/drm] Error 2 make[2]: *** [/kisskb/src/scripts/Makefile.build:505: drivers/gpu] Error 2 make[1]: *** [/kisskb/src/Makefile:1681: drivers] Error 2 make: *** [Makefile:179: sub-make] Error 2 Command 'make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- ' returned non-zero exit status 2 # rm -rf /kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 # Build took: 0:03:18.590426