FYI, we noticed the below changes on https://git.linaro.org/people/ard.biesheuvel/linux-arm arm64-kaslr-v4a commit bf2d2b07db19001ae0bd55826025b0ba47fae0c2 ("kallsyms: add support for relative offsets in kallsyms address table") +-----------------------------------------------------------+------------+------------+ | | 2c4d21df0f | bf2d2b07db | +-----------------------------------------------------------+------------+------------+ | boot_successes | 10 | 0 | | boot_failures | 6 | 36 | | Kernel_panic-not_syncing:Attempted_to_kill_init!exitcode= | 2 | | | IP-Config:Auto-configuration_of_network_failed | 4 | | | general_protection_fault:#[##]PREEMPT_PREEMPT_KASANKASAN | 0 | 36 | | general_protection_fault:#[##] | 0 | 36 | | BUG:kernel_boot_hang | 0 | 36 | +-----------------------------------------------------------+------------+------------+ [ 0.281636] kasan: CONFIG_KASAN_INLINE enabled [ 0.282416] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 0.282416] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] general protection fault: 0000 [#1] PREEMPT PREEMPT KASANKASAN [ 0.284561] Modules linked in: [ 0.284561] Modules linked in: [ 0.285136] CPU: 0 PID: 1 Comm: swapper Not tainted 4.5.0-rc1-00036-gbf2d2b0 #1 [ 0.285136] CPU: 0 PID: 1 Comm: swapper Not tainted 4.5.0-rc1-00036-gbf2d2b0 #1 [ 0.286438] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 0.286438] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 0.288000] task: ffff88000fcb0000 ti: ffff88000fcb8000 task.ti: ffff88000fcb8000 [ 0.288000] task: ffff88000fcb0000 ti: ffff88000fcb8000 task.ti: ffff88000fcb8000 [ 0.289287] RIP: 0010:[<ffffffff8120688c>]

On 02/01/2016 04:20 PM, Andrew Morton wrote: > > On Thu, 28 Jan 2016 09:12:15 +0800 kernel test robot > <ying.huang(a)linux.intel.com&gt; wrote: > >> FYI, we noticed the below changes on >> >> https://git.linaro.org/people/ard.biesheuvel/linux-arm arm64-kaslr-v4a >> commit bf2d2b07db19001ae0bd55826025b0ba47fae0c2 ("kallsyms: add support >> for relative offsets in kallsyms address table") >> >> >> >> +-----------------------------------------------------------+------------+------------+ >> | | 2c4d21df0f >> | bf2d2b07db | >> >> +-----------------------------------------------------------+------------+------------+ >> | boot_successes | 10 >> | 0 | >> | boot_failures | 6 >> | 36 | >> | Kernel_panic-not_syncing:Attempted_to_kill_init!exitcode= | 2 >> | | >> | IP-Config:Auto-configuration_of_network_failed | 4 >> | | >> | general_protection_fault:#[##]PREEMPT_PREEMPT_KASANKASAN | 0 >> | 36 | >> | general_protection_fault:#[##] | 0 >> | 36 | >> | BUG:kernel_boot_hang | 0 >> | 36 | >> >> +-----------------------------------------------------------+------------+------------+ >> >> >> >> [ 0.281636] kasan: CONFIG_KASAN_INLINE enabled >> >> [ 0.282416] kasan: GPF could be caused by NULL-ptr deref or user memory >> access >> [ 0.282416] kasan: GPF could be caused by NULL-ptr deref or user memory >> accessgeneral protection fault: 0000 [#1] general protection fault: 0000 >> [#1] PREEMPT PREEMPT KASANKASAN >> >> [ 0.284561] Modules linked in: >> [ 0.284561] Modules linked in: >> >> [ 0.285136] CPU: 0 PID: 1 Comm: swapper Not tainted >> 4.5.0-rc1-00036-gbf2d2b0 #1 >> [ 0.285136] CPU: 0 PID: 1 Comm: swapper Not tainted >> 4.5.0-rc1-00036-gbf2d2b0 #1 >> [ 0.286438] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS >> Debian-1.8.2-1 04/01/2014 >> [ 0.286438] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS >> Debian-1.8.2-1 04/01/2014 >> [ 0.288000] task: ffff88000fcb0000 ti: ffff88000fcb8000 task.ti: >> ffff88000fcb8000 >> [ 0.288000] task: ffff88000fcb0000 ti: ffff88000fcb8000 task.ti: >> ffff88000fcb8000 >> [ 0.289287] RIP: 0010:[<ffffffff8120688c>] > > > I'm not sufficiently familiar with KASAN to be able to interpret this. > Perhaps Andrey can shed some light? > > The lack of symbol decoding is a problem. > > CONFIG_KALLSYMS=y > CONFIG_KALLSYMS_ALL=y > CONFIG_KALLSYMS_BASE_RELATIVE=y > > It should be there. Perhaps it is not because this error is itself > (possibly) related to kallsyms changes? > Probably. I had seen something similar (crash and no symbols) with an earlier version of the patch, if the symbols were not created. There might be a message in the log, indicating that kallsyms failed to generate the symbols.