Hi Ying, Does testing happen with CONFIG_KASAN=y? If not, this is probably a flake caused by something else.
On Mon, Nov 2, 2015 at 9:06 AM, kernel test robot <[email protected]> wrote: > FYI, we noticed the below changes on > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > commit df4c0e36f1b1782b0611a77c52cc240e5c4752dd ("fs: dcache: manually > unpoison dname after allocation to shut up kasan's reports") > > > The commit fixed a KASan bug, but introduced or revealed a soft lockup > issue as follow. > > > [ 116.546697] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! > [swapper/0:1] > [ 116.546697] irq event stamp: 3018750 > [ 116.546697] hardirqs last enabled at (3018749): [<ffffffff8224f36c>] > restore_args+0x0/0x30 > [ 116.546697] hardirqs last disabled at (3018750): [<ffffffff8224f65d>] > apic_timer_interrupt+0x6d/0x80 > [ 116.546697] softirqs last enabled at (3018748): [<ffffffff810de898>] > __do_softirq+0x417/0x65b > [ 116.546697] softirqs last disabled at (3018743): [<ffffffff810ded30>] > irq_exit+0x55/0xc3 > [ 116.546697] CPU: 0 PID: 1 Comm: swapper/0 Not tainted > 3.19.0-05249-gdf4c0e3 #1 > [ 116.546697] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > Debian-1.8.2-1 04/01/2014 > [ 116.546697] task: ffff88002f3f0000 ti: ffff88002f3f8000 task.ti: > ffff88002f3f8000 > [ 116.546697] RIP: 0010:[<ffffffff8125fdf9>] [<ffffffff8125fdf9>] > __asan_load4+0x12/0x91 > [ 116.546697] RSP: 0000:ffff88002f3fbdc8 EFLAGS: 00000282 > [ 116.546697] RAX: ffff7fffffffffff RBX: 0000000000000000 RCX: > dffffc0000000000 > [ 116.546697] RDX: fffffbfff0763087 RSI: ffffffff83b18b10 RDI: > ffffffff83b1803c > [ 116.546697] RBP: ffff88002f3fbdf8 R08: 0000000000000001 R09: > fffffbfff0763074 > [ 116.546697] R10: ffffffff83b183a7 R11: fffffbfff0763074 R12: > ffff880038d29003 > [ 116.546697] R13: ffffed00071a5200 R14: ffffffff818cfadb R15: > ffff88002f3fbdf8 > [ 116.546697] FS: 0000000000000000(0000) GS:ffff88002f600000(0000) > knlGS:0000000000000000 > [ 116.546697] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > [ 116.546697] CR2: 0000000000000000 CR3: 0000000002793000 CR4: > 00000000000006f0 > [ 116.546697] Stack: > [ 116.546697] ffffffff83b18d5c ffffffff83b18b08 ffffffff83b18878 > ffffffff83b18b10 > [ 116.546697] ffffffff83b18868 0000000000000000 ffff88002f3fbe48 > ffffffff8223c4d3 > [ 116.546697] 0000000000000000 c4400d6283b18d40 0000000000000202 > 0000000000000d98 > [ 116.546697] Call Trace: > [ 116.546697] [<ffffffff8223c4d3>] insert_augmented+0x52/0xf5 > [ 116.546697] [<ffffffff82b7b4ef>] rbtree_test_init+0x151/0x205 > [ 116.546697] [<ffffffff82b7b39e>] ? glob_init+0x11c/0x11c > [ 116.546697] [<ffffffff82b222dc>] do_one_initcall+0x105/0x197 > [ 116.546697] [<ffffffff82b22501>] kernel_init_freeable+0x193/0x22e > [ 116.546697] [<ffffffff8222ba4b>] ? rest_init+0x14d/0x14d > [ 116.546697] [<ffffffff8222ba59>] kernel_init+0xe/0xdf > [ 116.546697] [<ffffffff8224e5fc>] ret_from_fork+0x7c/0xb0 > [ 116.546697] [<ffffffff8222ba4b>] ? rest_init+0x14d/0x14d > [ 116.546697] Code: 38 00 74 13 48 8b 4d 08 ba 01 00 00 00 be 02 00 00 00 e8 > e0 09 00 00 c9 c3 55 48 b8 ff ff ff ff ff 7f ff ff 48 89 e5 48 83 ec 30 <48> > 39 c7 77 23 48 8b 45 08 48 89 7d d8 48 8d 7d d8 48 c7 45 e8 > [ 116.546697] Kernel panic - not syncing: softlockup: hung tasks > [ 116.546697] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G L > 3.19.0-05249-gdf4c0e3 #1 > [ 116.546697] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > Debian-1.8.2-1 04/01/2014 > [ 116.546697] 0000000000000000 0000000000000000 0000000000000000 > ffff88002f603d48 > [ 116.546697] ffffffff8223bcf7 fffffbfff074360b ffffffff8263d4e2 > ffff88002f603dc8 > [ 116.546697] ffffffff82234300 ffff88002f603dc8 ffffffff00000008 > ffff88002f603dd8 > [ 116.546697] Call Trace: > [ 116.546697] <IRQ> [<ffffffff8223bcf7>] dump_stack+0x4c/0x65 > [ 116.546697] [<ffffffff82234300>] panic+0xed/0x231 > [ 116.546697] [<ffffffff811adf9d>] watchdog_timer_fn+0x1d2/0x1f8 > [ 116.546697] [<ffffffff811addcb>] ? __touch_watchdog+0x1c/0x1c > [ 116.546697] [<ffffffff8117083e>] __run_hrtimer+0x283/0x6a2 > [ 116.546697] [<ffffffff81171aaf>] hrtimer_run_queues+0x126/0x145 > [ 116.546697] [<ffffffff8116ff2f>] run_local_timers+0xe/0x1a > [ 116.546697] [<ffffffff8116ff62>] update_process_times+0x27/0x54 > [ 116.546697] [<ffffffff81181e76>] tick_nohz_handler+0x101/0x164 > [ 116.546697] [<ffffffff81040dbc>] local_apic_timer_interrupt+0x78/0x80 > [ 116.546697] [<ffffffff8225144c>] smp_apic_timer_interrupt+0x57/0x69 > [ 116.546697] [<ffffffff8224f662>] apic_timer_interrupt+0x72/0x80 > [ 116.546697] <EOI> [<ffffffff8125fdf9>] ? __asan_load4+0x12/0x91 > [ 116.546697] [<ffffffff8223c4d3>] insert_augmented+0x52/0xf5 > [ 116.546697] [<ffffffff82b7b4ef>] rbtree_test_init+0x151/0x205 > [ 116.546697] [<ffffffff82b7b39e>] ? glob_init+0x11c/0x11c > [ 116.546697] [<ffffffff82b222dc>] do_one_initcall+0x105/0x197 > [ 116.546697] [<ffffffff82b22501>] kernel_init_freeable+0x193/0x22e > [ 116.546697] [<ffffffff8222ba4b>] ? rest_init+0x14d/0x14d > [ 116.546697] [<ffffffff8222ba59>] kernel_init+0xe/0xdf > [ 116.546697] [<ffffffff8224e5fc>] ret_from_fork+0x7c/0xb0 > [ 116.546697] [<ffffffff8222ba4b>] ? rest_init+0x14d/0x14d > [ 116.546697] Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: > 0xffffffff80000000-0xffffffff9fffffff) > > > Thanks, > Ying Huang -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
