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Date: Thu, 1 Oct 2015 13:02:46 +0530 From: Pankaj Jangra <jangra.pankaj9@...il.com> To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, linux-arm-kernel@...ts.infradead.org Subject: Undefined instruction error on Cortex A57 (aarch64) in init process In android system, after system is running for long time say 10 hour, some time i am hitting below traces: init[1]: undefined instruction: pc=0000000000401624 Code: 1a9f00c2 aa1703e0 2a1603e1 9400e1bf (6b1f001f) Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004 CPU: 0 PID: 1 Comm: init Tainted: G O 3.10.67-g978f332 #15 Call trace: [<ffffffc000089ccc>] dump_backtrace+0x0/0xf4 [<ffffffc00008a05c>] show_stack+0x10/0x1c [<ffffffc0003738c0>] dump_stack+0x1c/0x28 [<ffffffc0000aa84c>] panic+0xf8/0x118 [<ffffffc0000af790>] find_new_reaper+0x98/0x154 [<ffffffc0000b0490>] forget_original_parent+0x40/0x1cc [<ffffffc0000b0630>] exit_notify+0x14/0x16c [<ffffffc0000b0a4c>] do_exit+0x2c4/0x3ec [<ffffffc0000b1814>] do_group_exit+0xe8/0xec [<ffffffc0000c1b8c>] get_signal_to_deliver+0x310/0x3a8 [<ffffffc000089648>] do_signal+0x160/0x180 The objdump of binary around this address is : 401610: eb1f011f cmp x8, xzr 401614: 1a9f00c2 csel w2, w6, wzr, eq bootchart_count = 0; } } endif nr = poll(ufds, fd_count, timeout); 401618: aa1703e0 mov x0, x23 40161c: 2a1603e1 mov w1, w22 401620: 9400e1df bl 439d9c <poll> if (nr <= 0) 401624: 6b1f001f cmp w0, wzr 401628: 54fffccd b.le 4015c0 <main+0x558> continue; for (i = 0; i < fd_count; i++) { 40162c: 34fffcb6 cbz w22, 4015c0 <main+0x558> 401630: 510006c9 sub w9, w22, #0x1 401634: aa1703f3 mov x19, x23 401638: 9100052a add x10, x9, #0x1 40163c: 8b0a0ef4 add x20, x23, x10, lsl #3 Could any one please point me to what could be the problem here ? Or how further i can approach to debug this further. -Pankaj Kumar -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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