# git rev-parse -q --verify a9f675f950a07d5c1dbcbb97aabac56f5ed085e3^{commit} a9f675f950a07d5c1dbcbb97aabac56f5ed085e3 already have revision, skipping fetch # git checkout -q -f -B kisskb a9f675f950a07d5c1dbcbb97aabac56f5ed085e3 # git clean -qxdf # < git log -1 # commit a9f675f950a07d5c1dbcbb97aabac56f5ed085e3 # Author: Milton Miller # Date: Thu Jul 16 09:37:04 2020 +1000 # # powerpc/vdso: Fix vdso cpu truncation # # The code in vdso_cpu_init that exposes the cpu and numa node to # userspace via SPRG_VDSO incorrctly masks the cpu to 12 bits. This means # that any kernel running on a box with more than 4096 threads (NR_CPUS # advertises a limit of of 8192 cpus) would expose userspace to two cpu # contexts running at the same time with the same cpu number. # # Note: I'm not aware of any distro shipping a kernel with support for more # than 4096 threads today, nor of any system image that currently exceeds # 4096 threads. Found via code browsing. # # Fixes: 18ad51dd342a7eb09dbcd059d0b451b616d4dafc ("powerpc: Add VDSO version of getcpu") # Signed-off-by: Milton Miller # Signed-off-by: Anton Blanchard # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/20200715233704.1352257-1-anton@ozlabs.org # < /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 a9f675f950a07d5c1dbcbb97aabac56f5ed085e3 # < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc85xx_defconfig # < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_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 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcbf508) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcaed04) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:20 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6228901 Bytes = 6082.91 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:20 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6228764 Bytes = 6082.78 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:20 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6228796 Bytes = 6082.81 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:20 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6231239 Bytes = 6085.19 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:20 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6228945 Bytes = 6082.95 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:20 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6228903 Bytes = 6082.91 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:20 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6228932 Bytes = 6082.94 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:20 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6228751 Bytes = 6082.76 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:20 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6229333 Bytes = 6083.33 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:20 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6228789 Bytes = 6082.80 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:20 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6231282 Bytes = 6085.24 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:20 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6230931 Bytes = 6084.89 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6199413 Bytes = 6054.11 KiB = 5.91 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6228765 Bytes = 6082.78 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6228913 Bytes = 6082.92 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.8.0-rc2-ga9f675f950a0 Created: Thu Jul 16 14:45:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6230808 Bytes = 6084.77 KiB = 5.94 MiB Load Address: 00d00000 Entry Point: 00d002a4 Completed OK # rm -rf /kisskb/build/powerpc-next_mpc85xx_defconfig_powerpc-gcc5 # Build took: 0:02:40.907131