# git rev-parse -q --verify 6457f42eb3f6e9552366631bd5aeb096ae5f599a^{commit} 6457f42eb3f6e9552366631bd5aeb096ae5f599a already have revision, skipping fetch # git checkout -q -f -B kisskb 6457f42eb3f6e9552366631bd5aeb096ae5f599a # git clean -qxdf # < git log -1 # commit 6457f42eb3f6e9552366631bd5aeb096ae5f599a # Author: Aneesh Kumar K.V # Date: Wed May 15 15:15:23 2019 +0530 # # powerpc/mm: Drop VM_BUG_ON in get_region_id() # # We call get_region_id() without validating the ea value. That means # with a wrong ea value we hit the BUG as below. # # kernel BUG at arch/powerpc/include/asm/book3s/64/hash.h:129! # Oops: Exception in kernel mode, sig: 5 [#1] # LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries # CPU: 0 PID: 3937 Comm: access_tests Not tainted 5.1.0 # .... # NIP [c00000000007ba20] do_slb_fault+0x70/0x320 # LR [c00000000000896c] data_access_slb_common+0x15c/0x1a0 # # Fix this by removing the VM_BUG_ON. All callers make sure the returned # region id is valid and error out otherwise. # # Fixes: 0034d395f89d ("powerpc/mm/hash64: Map all the kernel regions in the same 0xc range") # Reported-by: Andrew Donnellan # Signed-off-by: Aneesh Kumar K.V # Signed-off-by: Michael Ellerman # < /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 6457f42eb3f6e9552366631bd5aeb096ae5f599a # < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_85xx_sbc8548_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- 85xx/sbc8548_defconfig # make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_85xx_sbc8548_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- :1388:2: warning: #warning syscall open_tree not implemented [-Wcpp] :1391:2: warning: #warning syscall move_mount not implemented [-Wcpp] :1394:2: warning: #warning syscall fsopen not implemented [-Wcpp] :1397:2: warning: #warning syscall fsconfig not implemented [-Wcpp] :1400:2: warning: #warning syscall fsmount not implemented [-Wcpp] :1403:2: warning: #warning syscall fspick not implemented [-Wcpp] /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:331:21: note: 'pdeo' was declared here /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:187:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:247:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:227:19: note: 'i' was declared here INFO: Uncompressed kernel (size 0x477f78) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x500000) INFO: Uncompressed kernel (size 0x4678f0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x500000) Image Name: Linux-5.1.0-g6457f42eb3f6 Created: Fri May 17 02:57:06 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2243512 Bytes = 2190.93 KiB = 2.14 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.1.0-g6457f42eb3f6 Created: Fri May 17 02:57:06 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2272422 Bytes = 2219.16 KiB = 2.17 MiB Load Address: 00500000 Entry Point: 005002a8 Completed OK # rm -rf /kisskb/build/powerpc-fixes_85xx_sbc8548_defconfig_powerpc-gcc4.6 # Build took: 0:00:14.956510