# git rev-parse -q --verify d5c243989fb0cb03c74d7340daca3b819f706ee7^{commit} d5c243989fb0cb03c74d7340daca3b819f706ee7 already have revision, skipping fetch # git checkout -q -f -B kisskb d5c243989fb0cb03c74d7340daca3b819f706ee7 # git clean -qxdf # < git log -1 # commit d5c243989fb0cb03c74d7340daca3b819f706ee7 # Author: Christophe Leroy # Date: Mon Dec 21 06:18:03 2020 +0000 # # powerpc/32: Fix vmap stack - Properly set r1 before activating MMU on syscall too # # We need r1 to be properly set before activating MMU, otherwise any new # exception taken while saving registers into the stack in syscall # prologs will use the user stack, which is wrong and will even lockup # or crash when KUAP is selected. # # Do that by switching the meaning of r11 and r1 until we have saved r1 # to the stack: copy r1 into r11 and setup the new stack pointer in r1. # To avoid complicating and impacting all generic and specific prolog # code (and more), copy back r1 into r11 once r11 is save onto # the stack. # # We could get rid of copying r1 back and forth at the cost of rewriting # everything to use r1 instead of r11 all the way when CONFIG_VMAP_STACK # is set, but the effort is probably not worth it for now. # # Fixes: da7bb43ab9da ("powerpc/32: Fix vmap stack - Properly set r1 before activating MMU") # Cc: stable@vger.kernel.org # v5.10+ # Signed-off-by: Christophe Leroy # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/a3d819d5c348cee9783a311d5d3f3ba9b48fd219.1608531452.git.christophe.leroy@csgroup.eu # < /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 d5c243989fb0cb03c74d7340daca3b819f706ee7 # < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc85xx_smp_defconfig # < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- In file included from /kisskb/src/include/linux/kernel.h:10:0, 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 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xdf7e08) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xde76dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6812217 Bytes = 6652.56 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6812169 Bytes = 6652.51 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6812174 Bytes = 6652.51 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e00314 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6812304 Bytes = 6652.64 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6812307 Bytes = 6652.64 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6812652 Bytes = 6652.98 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6813516 Bytes = 6653.82 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6812364 Bytes = 6652.70 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6812922 Bytes = 6653.24 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e00314 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6812973 Bytes = 6653.29 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e00314 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6812314 Bytes = 6652.65 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e00314 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6814095 Bytes = 6654.39 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6814456 Bytes = 6654.74 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6814440 Bytes = 6654.73 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6812172 Bytes = 6652.51 KiB = 6.50 MiB Load Address: 00e00000 Entry Point: 00e00314 Image Name: Linux-5.10.0-gd5c243989fb0 Created: Tue Dec 22 01:06:19 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6780762 Bytes = 6621.84 KiB = 6.47 MiB Load Address: 00000000 Entry Point: 00000000 Completed OK # rm -rf /kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc-gcc4.9 # Build took: 0:02:32.838680