# git rev-parse -q --verify 51c3c62b58b357e8d35e4cc32f7b4ec907426fe3^{commit} 51c3c62b58b357e8d35e4cc32f7b4ec907426fe3 already have revision, skipping fetch # git checkout -q -f -B kisskb 51c3c62b58b357e8d35e4cc32f7b4ec907426fe3 # git clean -qxdf # < git log -1 # commit 51c3c62b58b357e8d35e4cc32f7b4ec907426fe3 # Author: Michael Neuling # Date: Fri Sep 14 11:14:11 2018 +1000 # # powerpc: Avoid code patching freed init sections # # This stops us from doing code patching in init sections after they've # been freed. # # In this chain: # kvm_guest_init() -> # kvm_use_magic_page() -> # fault_in_pages_readable() -> # __get_user() -> # __get_user_nocheck() -> # barrier_nospec(); # # We have a code patching location at barrier_nospec() and # kvm_guest_init() is an init function. This whole chain gets inlined, # so when we free the init section (hence kvm_guest_init()), this code # goes away and hence should no longer be patched. # # We seen this as userspace memory corruption when using a memory # checker while doing partition migration testing on powervm (this # starts the code patching post migration via # /sys/kernel/mobility/migration). In theory, it could also happen when # using /sys/kernel/debug/powerpc/barrier_nospec. # # Cc: stable@vger.kernel.org # 4.13+ # Signed-off-by: Michael Neuling # Reviewed-by: Nicholas Piggin # Reviewed-by: Christophe Leroy # Signed-off-by: Michael Ellerman # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < git log --format=%s --max-count=1 51c3c62b58b357e8d35e4cc32f7b4ec907426fe3 # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- mpc85xx_smp_defconfig # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/kernel/cgroup/cgroup-v1.c: In function 'cgroup1_mount': /kisskb/src/kernel/cgroup/cgroup-v1.c:1256:20: warning: 'root' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page': /kisskb/src/mm/hugetlb.c:1433:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read': /kisskb/src/drivers/base/regmap/regmap.c:2511:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write': /kisskb/src/drivers/base/regmap/regmap.c:1833:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/soc/codecs/wm8960.c: In function 'wm8960_configure_clocking': /kisskb/src/sound/soc/codecs/wm8960.c:803:70: warning: 'j' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/soc/codecs/wm8960.c:800:68: warning: 'i' 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:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:341:21: note: 'pdeo' was declared here /kisskb/src/drivers/i2c/i2c-core-base.c: In function 'i2c_generic_scl_recovery': /kisskb/src/drivers/i2c/i2c-core-base.c:235:5: warning: 'ret' 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:185:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/udf/unicode.c: In function 'udf_name_conv_char': /kisskb/src/fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd': /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:139:6: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:251:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:231:19: note: 'i' was declared here arch/powerpc/boot/mpc8541cds.dtb: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) arch/powerpc/boot/mpc8555cds.dtb: 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 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1583c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc0507c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5834078 Bytes = 5697.34 KiB = 5.56 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5857670 Bytes = 5720.38 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00248 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5858943 Bytes = 5721.62 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00248 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5857556 Bytes = 5720.27 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00288 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5858963 Bytes = 5721.64 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00248 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5857648 Bytes = 5720.36 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00288 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5858103 Bytes = 5720.80 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00288 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5858177 Bytes = 5720.88 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00288 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5858679 Bytes = 5721.37 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00248 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5857814 Bytes = 5720.52 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00248 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5857647 Bytes = 5720.36 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00288 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5857680 Bytes = 5720.39 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00248 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5857810 Bytes = 5720.52 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00248 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5858536 Bytes = 5721.23 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00248 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5858601 Bytes = 5721.29 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00248 Image Name: Linux-4.19.0-rc3-g51c3c62b58b3 Created: Tue Sep 18 23:45:21 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5858090 Bytes = 5720.79 KiB = 5.59 MiB Load Address: 00d00000 Entry Point: 00d00248 Completed OK # rm -rf /kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc # Build took: 0:01:39.485313