On Thu, 11 Aug 2016 12:52:27 +0800 kernel test robot <fengguang...@intel.com> wrote:
> Greetings, > > 0day kernel testing robot got the below dmesg and the first bad commit is > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > > commit 80a9201a5965f4715d5c09790862e0df84ce0614 > Author: Alexander Potapenko <gli...@google.com> > AuthorDate: Thu Jul 28 15:49:07 2016 -0700 > Commit: Linus Torvalds <torva...@linux-foundation.org> > CommitDate: Thu Jul 28 16:07:41 2016 -0700 > > mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB > > For KASAN builds: > - switch SLUB allocator to using stackdepot instead of storing the > allocation/deallocation stacks in the objects; > - change the freelist hook so that parts of the freelist can be put > into the quarantine. > > ... > > [ 64.298576] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! > [swapper/0:1] > [ 64.300827] irq event stamp: 5606950 > [ 64.301377] hardirqs last enabled at (5606949): [<ffffffff98a4ef09>] > T.2097+0x9a/0xbe > [ 64.302586] hardirqs last disabled at (5606950): [<ffffffff997347a9>] > apic_timer_interrupt+0x89/0xa0 > [ 64.303991] softirqs last enabled at (5605564): [<ffffffff99735abe>] > __do_softirq+0x23e/0x2bb > [ 64.305308] softirqs last disabled at (5605557): [<ffffffff988ee34f>] > irq_exit+0x73/0x108 > [ 64.306598] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.7.0-05999-g80a9201 > #1 > [ 64.307678] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > Debian-1.8.2-1 04/01/2014 > [ 64.326233] task: ffff88000ea19ec0 task.stack: ffff88000ea20000 > [ 64.327137] RIP: 0010:[<ffffffff9890f590>] [<ffffffff9890f590>] > __kernel_text_address+0xb/0xa1 > [ 64.328504] RSP: 0000:ffff88000ea27348 EFLAGS: 00000207 > [ 64.329320] RAX: 0000000000000001 RBX: ffff88000ea275c0 RCX: > 0000000000000001 > [ 64.330426] RDX: ffff88000ea27ff8 RSI: 024080c099733d8f RDI: > 024080c099733d8f > [ 64.331496] RBP: ffff88000ea27348 R08: ffff88000ea27678 R09: > 0000000000000000 > [ 64.332567] R10: 0000000000021298 R11: ffffffff990f235c R12: > ffff88000ea276c8 > [ 64.333635] R13: ffffffff99805e20 R14: ffff88000ea19ec0 R15: > 0000000000000000 > [ 64.334706] FS: 0000000000000000(0000) GS:ffff88000ee00000(0000) > knlGS:0000000000000000 > [ 64.335916] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 64.336782] CR2: 0000000000000000 CR3: 000000000aa0a000 CR4: > 00000000000406b0 > [ 64.337846] Stack: > [ 64.338206] ffff88000ea273a8 ffffffff9881f3dd 024080c099733d8f > ffffffffffff8000 > [ 64.339410] ffff88000ea27678 ffff88000ea276c8 000000020e81a4d8 > ffff88000ea273f8 > [ 64.340602] ffffffff99805e20 ffff88000ea19ec0 ffff88000ea27438 > ffff88000ee07fc0 > [ 64.348993] Call Trace: > [ 64.349380] [<ffffffff9881f3dd>] print_context_stack+0x68/0x13e > [ 64.350295] [<ffffffff9881e4af>] dump_trace+0x3ab/0x3d6 > [ 64.351102] [<ffffffff9882f6e4>] save_stack_trace+0x31/0x5c > [ 64.351964] [<ffffffff98a521db>] kasan_kmalloc+0x126/0x1f6 > [ 64.365727] [<ffffffff9882f6e4>] ? save_stack_trace+0x31/0x5c > [ 64.366675] [<ffffffff98a521db>] ? kasan_kmalloc+0x126/0x1f6 > [ 64.367560] [<ffffffff9904a8eb>] ? acpi_ut_create_generic_state+0x43/0x5c > At a guess I'd say that arch/x86/kernel/dumpstack.c:print_context_stack() failed to terminate, or took a super long time. Is that a thing that is known to be possible?
