# 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/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 21f8b2fa3ca5b01f7a2b51b89ce97a3705a15aa0 # < make -s -j 10 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_smp_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc85xx_smp_defconfig # < make -s -j 10 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_smp_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 10 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_smp_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 10 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_smp_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- In file included from /kisskb/src/include/linux/kernel.h:11:0, from /kisskb/src/include/linux/list.h:9, from /kisskb/src/include/linux/module.h:12, from /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:15: /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd': /kisskb/src/include/linux/err.h:22:49: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] #define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO) ^ /kisskb/src/include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:139:6: note: in expansion of macro 'IS_ERR_VALUE' if (IS_ERR_VALUE(fep->ring_mem_addr)) ^ /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8541cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8555cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd200a8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:33:55 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6449100 Bytes = 6297.95 KiB = 6.15 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:33:55 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6481294 Bytes = 6329.39 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e002a4 INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:33:55 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6479369 Bytes = 6327.51 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:33:55 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6479878 Bytes = 6328.01 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:33:55 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6479369 Bytes = 6327.51 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e002a4 INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:33:55 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6481296 Bytes = 6329.39 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:33:55 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6479360 Bytes = 6327.50 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:33:55 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6479391 Bytes = 6327.53 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e002a4 INFO: Uncompressed kernel (size 0xd308ac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:33:55 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6480632 Bytes = 6328.74 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:33:55 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6479425 Bytes = 6327.56 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e00314 Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:34:00 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6479363 Bytes = 6327.50 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e00314 Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:34:00 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6479363 Bytes = 6327.50 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e00314 Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:34:00 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6479539 Bytes = 6327.67 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:34:00 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6479410 Bytes = 6327.55 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e00314 Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:34:00 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6479382 Bytes = 6327.52 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.6.0-rc2-g21f8b2fa3ca5 Created: Wed Mar 25 13:34:00 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6479352 Bytes = 6327.49 KiB = 6.18 MiB Load Address: 00e00000 Entry Point: 00e00314 Completed OK # rm -rf /kisskb/build/powerpc-next_mpc85xx_smp_defconfig_powerpc-gcc5 # Build took: 0:04:15.231229