Greetings, I got the below dmesg and the first bad commit is commit 10fe632a9c6b9ade004c8b0c2ea2c3c562d24f18 Author: Kees Cook Date: Thu Apr 25 14:20:25 2013 -0700 x86, kaslr: find minimum safe relocation position Examine all the known unsafe areas and avoid them by just raising the minimum relocation position to be past them. Signed-off-by: Kees Cook Command line: hung_task_panic=1 rcutree.rcu_cpu_stall_timeout=100 log_buf_len=8M ignore_loglevel debug sched_debug apic=debug dynamic_printk sysrq_always_enabled panic=10 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw link=/kernel-tests/run-queue/kvm/i386-randconfig-i005-1008/kees:kaslr-c-v6/.vmlinuz-544c3c7c7c7a22deabefbdd4b42675924bcc7afa-20131008114452-8-inn branch=kees/kaslr-c-v6 BOOT_IMAGE=/kernel/i386-randconfig-i005-1008/544c3c7c7c7a22deabefbdd4b42675924bcc7afa/vmlinuz-3.12.0-rc4-00027-g544c3c7 Early hang kernel: vmlinuz-3.12.0-rc4-00027-g544c3c7 3.12.0-rc4-00027-g544c3c7 #351 git bisect start 544c3c7c7c7a22deabefbdd4b42675924bcc7afa 8b5ede69d24db939f52b47effff2f6fe1e83e08b -- git bisect bad 10fe632a9c6b9ade004c8b0c2ea2c3c562d24f18 # 12:03 0- 2 x86, kaslr: find minimum safe relocation position git bisect good 7e56c4c33c1f6a0b6ef197d39dd4719f2f107dda # 12:05 20+ 20 x86, kaslr: move CPU flags out of cpucheck git bisect good 9e74cc47cf67824cbfbc31e0214c9dca0ec47b61 # 12:08 20+ 20 x86, kaslr: return location from decompress_kernel git bisect good 9e74cc47cf67824cbfbc31e0214c9dca0ec47b61 # 12:09 60+ 80 x86, kaslr: return location from decompress_kernel git bisect bad 544c3c7c7c7a22deabefbdd4b42675924bcc7afa # 12:10 0- 19 x86, kaslr: raise max positions to 1GiB on x86_64 git bisect good 8b5ede69d24db939f52b47effff2f6fe1e83e08b # 12:13 60+ 89 powerpc/irq: Don't switch to irq stack from softirq stack git bisect bad a0cf1abc25ac197dd97b857c0f6341066a8cb1cf # 12:21 24- 25 Add linux-next specific files for 20130927 Thanks, Fengguang