Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933444AbcKQJam (ORCPT ); Thu, 17 Nov 2016 04:30:42 -0500 Received: from merlin.infradead.org ([205.233.59.134]:42556 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751884AbcKQJaf (ORCPT ); Thu, 17 Nov 2016 04:30:35 -0500 Date: Thu, 17 Nov 2016 10:30:28 +0100 From: Peter Zijlstra To: Josh Poimboeuf Cc: Vince Weaver , "linux-kernel@vger.kernel.org" , Ingo Molnar , Arnaldo Carvalho de Melo , "davej@codemonkey.org.uk" , "dvyukov@google.com" , Stephane Eranian Subject: Re: perf: fuzzer KASAN unwind_get_return_address Message-ID: <20161117093028.GT3157@twins.programming.kicks-ass.net> References: <20161115185756.GL3142@twins.programming.kicks-ass.net> <20161115205748.xtroftp55igs55bz@treble> <20161116130337.GT3142@twins.programming.kicks-ass.net> <20161116143746.zoxdxrfqvmx35wln@treble> <20161116144943.GB3117@twins.programming.kicks-ass.net> <20161116145849.GR3157@twins.programming.kicks-ass.net> <20161117044828.vedc3whqkuki624r@treble> <20161117090446.GC3142@twins.programming.kicks-ass.net> <20161117091341.GS3157@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20161117091341.GS3157@twins.programming.kicks-ass.net> User-Agent: Mutt/1.5.23.1 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 49003 Lines: 659 On Thu, Nov 17, 2016 at 10:13:41AM +0100, Peter Zijlstra wrote: > On Thu, Nov 17, 2016 at 10:04:46AM +0100, Peter Zijlstra wrote: > > On Wed, Nov 16, 2016 at 10:48:28PM -0600, Josh Poimboeuf wrote: > > > Peter or Vince, can you try to recreate with this patch? It dumps the > > > raw stack contents during a stack dump. Hopefully that would give a > > > clue about what's going wrong. > > > > > > Here goes... I'll do another run and get you the results of that as > > well. > > This one is funny, I've not seen that WARNING before. Let me do a third > run. > 3================================================================== 3BUG: KASAN: stack-out-of-bounds in unwind_get_return_address+0x1fb/0x220 at addr ffff88042f84baa0 3Read of size 8 by task perf_fuzzer/8638 0page:ffffea0010be12c0 count:1 mapcount:0 mapping: (null) index:0x0c 0flags: 0x2ffff8000000400(reserved) 1page dumped because: kasan: bad access detected dCPU: 1 PID: 8638 Comm: perf_fuzzer Not tainted 4.9.0-rc5-00530-gd8866fc-dirty #4 dHardware name: Intel Corporation S2600GZ/S2600GZ, BIOS SE5C600.86B.02.02.0002.122320131210 12/23/2013 dCall Trace: d d dump_stack+0x67/0x94 d kasan_report_error+0x4a1/0x4d0 d __asan_report_load8_noabort+0x43/0x50 d ? unwind_get_return_address+0x1fb/0x220 d unwind_get_return_address+0x1fb/0x220 d perf_callchain_kernel+0x356/0x550 d ? arch_perf_update_userpage+0x350/0x350 d ? insn_get_opcode.part.4+0x3ac/0x910 d get_perf_callchain+0x276/0x670 d ? early_serial_putc+0x24/0x70 d ? put_callchain_buffers+0x50/0x50 d ? early_serial_putc+0x1d/0x70 d ? insn_get_displacement.part.7+0x4a/0x500 d perf_callchain+0x128/0x1a0 d ? early_serial_putc+0x1d/0x70 d perf_prepare_sample+0x70e/0xfb0 d ? intel_pmu_pebs_fixup_ip+0x2c9/0x4c0 d perf_event_output_forward+0x93/0x110 d ? perf_prepare_sample+0xfb0/0xfb0 d ? early_serial_putc+0x1d/0x70 d ? early_serial_putc+0x24/0x70 d ? early_serial_putc+0x24/0x70 d ? sched_clock_cpu+0x11c/0x1a0 d __perf_event_overflow+0x1a3/0x570 d perf_event_overflow+0x14/0x20 d __intel_pmu_pebs_event+0x3ca/0x610 d ? pebs_update_state+0x310/0x310 d ? early_serial_putc+0x1d/0x70 d ? intel_pmu_disable_bts+0xc0/0xc0 d ? early_serial_putc+0x1d/0x70 d ? insn_get_prefixes.part.2+0x36d/0xc70 d ? insn_get_opcode.part.4+0x3ac/0x910 d ? number+0x71c/0xa70 d ? insn_get_opcode+0x42/0x50 d ? branch_type+0x122/0x3a0 d ? put_dec+0xb0/0xb0 d ? knc_pmu_handle_irq+0x3a0/0x3a0 d intel_pmu_drain_pebs_nhm+0x5f6/0xbf0 d ? __intel_pmu_pebs_event+0x610/0x610 d ? early_serial_write+0x7c/0xf0 d intel_pmu_handle_irq+0x4b2/0xa90 d ? intel_pmu_save_and_restart+0xe0/0xe0 d ? acpi_os_read_memory+0x228/0x262 d ? acpi_os_get_timer+0x1a/0x1a d ? vunmap_page_range+0x269/0x400 d ? ghes_copy_tofrom_phys+0x149/0x270 d ? ghes_read_estatus+0x11e/0x6b0 d ? ghes_copy_tofrom_phys+0x270/0x270 d perf_event_nmi_handler+0x2d/0x50 d nmi_handle+0x9e/0x250 d default_do_nmi+0x111/0x180 d do_nmi+0x1a2/0x210 d end_repeat_nmi+0x1a/0x1e dRIP: 0010:__intel_pmu_enable_all+0x11d/0x190 dRSP: 0018:ffff88042419f9b0 EFLAGS: 00000046c dRAX: 0000000000000000 RBX: ffff88072594aa80 RCX: 000000000000038f dRDX: 1ffff10085f0a6c8 RSI: 0000000000000000 RDI: ffff88042f853640 dRBP: ffff88042419f9b8 R08: 00000000000004c1 R09: ffffed0085f0a6ca dR10: 00000000ffffffff R11: 1ffff10085f0a6ec R12: 000000070000000f dR13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000002 d ? __intel_pmu_enable_all+0x11d/0x190 d ? __intel_pmu_enable_all+0x11d/0x190 d ffff88042f84a000: 0000000000000000 ... ffff88042f84a560: ffff8804af84a955 ffff88042f84a95d 0000000000000060 1ffff10085f094b8 ffff88042f84a580: 00000000ffffffff 0020000000000000 0000000000000000 00000000fffffffd ffff88042f84a5a0: 0000000000000001 0000000000000190 0000000000000010 ffff1060ffffff09 ffff88042f84a5c0: 0000000041b58ab3 ffff8804af84a9bd ffff88042f84a9c5 0000000000000060 ffff88042f84a5e0: 1ffff10085f094c5 00000000ffffffff 0020000000000000 0000000000000000 ffff88042f84a600: 00000000fffffffd 0000000000000001 0000000000000190 ffffffff8348be10 ffff88042f84a620: ffff1060ffffff09 0000000041b58ab3 ffffffff83a40503 ffffffff823ab960 ffff88042f84a640: ffff88042f84a700 ffff88042f313930 ffffffff823b7c54 ffff88042f84a758 ffff88042f84a660: ffff88042f84a760 ffff88042f84a758 ffff88042f84a956 0000000000000001 ffff88042f84a680: ffffffff8348bec9 ffff88042f84a9c5 0000000000000018 dffffc0000000000 ffff88042f84a6a0: ffff88042f84a818 ffff88042f84a768 ffff88042f84a790 ffffffff823b7c54 ffff88042f84a6c0: ffff88042f84a7c0 ffff88042f84a7c8 ffff88042f84a7c0 ffff88042f84a9be ffff88042f84a6e0: 1ffff10085f094e1 ffffed0085f094f9 000000007fffffff ffff8804af84a9bd ffff88042f84a700: ffffffff8348beca 0000000041b58ab3 ffffffff83a405aa ffffffff823b6ef0 ffff88042f84a720: 0000000000000000 ffff1060ffffff09 ffffffff823b8d95 0000000041b58ab3 ffff88042f84a740: ffffffff839ff69c ffffffff823b8d00 0000000000000000 0000000000000020 ffff88042f84a760: ffff88042f84a7e0 ffffed0085f094f4 1ffff10085f0950a ffff88042f84a930 ffff88042f84a780: ffffffff8101d21d ffffffffffffffff ffff88042f84a838 ffffffff823b8d95 ffff88042f84a7a0: 0000000041b58ab3 ffffffff839ff69c ffffffff823b8d00 ffffffff83892478 ffff88042f84a7c0: ffffffff00000020 ffff88042f84a848 ffff88042f84a800 ffff88042f84a870 ffff88042f84a7e0: ffff88042f84a9a8 dffffc0000000000 ffff88042f84a838 ffffffff813c861f ffff88042f84a800: ffffffff8348beca 0000000000000000 000000000000011d 0000000000000190 ffff88042f84a820: ffffffff83892478 ffffffff83892478 ffff88042f84a9a8 ffff88042f84a958 ffff88042f84a840: ffffffff813c883f 0000000000000016 0000000041b58ab3 ffffffff83a0c758 ffff88042f84a860: ffffffff813c86d0 ffffed0085f09514 0000000000000000 ffff88042f84aa30 ffff88042f84a880: ffff0a00ffffff05 ffff88042f84a962 ffff88042f84ac9e ffff88042f84a963 ffff88042f84a8a0: 0000000000000000 ffff88042f84a900 000000000000011d 0000000000000000 ffff88042f84a8c0: 0000000000000020 1ffff10085f09524 ffff0a00ffffff05 1ffff10085f09524 ffff88042f84a8e0: ffff88042f84a940 ffff0a00ffffff05 ffff88042f84a9ca ffff88042f84acff ffff88042f84a900: ffff88042f84a9cb 0000000000000000 ffff88042f84a968 ffffffff823adbcd ffff88042f84a920: 0000000041b58ab3 ffffffff83a40559 1ffff10085f09531 ffff0a00ffffff05 ffff88042f84a940: 1ffff10085f09531 ffff88042f84a9a8 ffff88042f84acdd ffff88042f84aed8 ffff88042f84a960: ffff0a00ffffff05 ffff88042f84aaf0 ffffffff823af620 0000000000000000 ffff88042f84a980: 0000000000000000 0000000041b58ab3 ffffffff83a40559 ffffffff823af530 ffff88042f84a9a0: 0000000000000000 5f6c65746e695f5f 62616e655f756d70 302b6c6c615f656c ffff88042f84a9c0: 3178302f64313178 0030300030003039 0000000000000000 0000000000000000 ffff88042f84a9e0: 0000000000000000 ffff0a00ffffff05 ffff88042f84aacd ffff88042f84ae22 ffff88042f84aa00: ffff88042f84aace ffff88042f84aed8 ffff88042f84acd8 ffffffff823adb30 ffff88042f84aa20: 1ffff10085f0954d 00000000ffffffff 0020f10085f09551 ffff0a00ffffff00 ffff88042f84aa40: 1ffff10000000010 ffff88042f84aa00 ffff88042f84aa20 ffff88042f84af10 ffff88042f84aa60: ffff103000001005 0000000041b58ab3 ffffffff83a40503 ffffffff823ab960 ffff88042f84aa80: ffffffffffffffff 3266383461613630 6666666638383034 ffffffff00000010 ffff88042f84aaa0: 0000000000000000 0000000000000002 ffff88042f84af10 ffff103000001009 ffff88042f84aac0: 0000000041b58ab3 ffff88042f84aed8 ffff88042f84ad1d ffff88042f84ac30 ffff88042f84aae0: 1ffff10085f09565 ffffffffffffffff 002088042f84abb0 ffffffff823b6600 ffff88042f84ab00: ffffffff00000010 ffff88042f84ad00 ffffffff823b6600 ffff88042f84ac10 ffff88042f84ab20: ffff103000001009 0000000041b58ab3 ffffffff83a40503 ffffffff823ab960 ffff88042f84ab40: ffffffff839f498b 3832336162393630 6666666666666666 ffff88042f84ac2f ffff88042f84ab60: ffff88042f84abb0 ffffffff823ad785 ffff88042f84ac70 0000000000000001 ffff88042f84ab80: ffff88042f84ad2d ffff88042f84abb0 ffffffff816213e5 ffff88042f84ad2d ffff88042f84aba0: ffffffff839f498f dffffc0000000000 ffff88042f84ac90 ffffffff823b72eb ffff88042f84abc0: ffff88042f84afd0 ffff88042f84afd8 ffffffff839f4990 ffff88042f84acd8 ffff88042f84abe0: 1ffff10085f09581 ffffed0085f095fb 0000000000000200 ffff88042f84aed8 ffff88042f84ac00: 0000000000000001 0000000041b58ab3 ffffffff83a405aa ffffffff823b6ef0 ffff88042f84ac20: ffff88042f84ac70 ffff103000001000 1ffff10085f0958a ffffffff83c88b40 ffff88042f84ac40: ffff88042f84aeb8 ffffffff81338af4 0000000041b58ab3 ffff88042f84ac78 ffff88042f84ac60: ffffffff811c0a51 ffff88042f84ad2e dffffc0000000000 ffff88042f84aca8 ffff88042f84ac80: ffffffff811c0afc ffff88042f84acd8 00000000ffffffff 1ffff10085f09597 ffff88042f84aca0: ffffffff83c88b40 ffff88042f84af20 ffffffff81338af4 0000000041b58ab3 ffff88042f84acc0: ffffffff83a03c41 ffffffff81338a00 ffff0a00ffffff00 3430383866666666 ffff88042f84ace0: 3063636134386632 666666666666203a 6333306133386666 6666666666203134 ffff88042f84ad00: 3236363636363636 3333333620613330 3833333331363033 3636362036363636 ffff88042f84ad20: 3336333032363336 1f000a3633363336 ffffffff83c88b40 ffff88042f84afb0 ffff88042f84ad40: ffffffff81338af4 0000000041b58ab3 ffffffff83a03c41 ffffffff81338a00 ffff88042f84ad60: 0000000041b58ab3 6177647261486401 3a656d616e206572 43206c65746e4920 ffff88042f84ad80: 697461726f70726f 3030363253206e6f 30303632532f5a47 534f4942202c5a47 ffff88042f84ada0: 3030364335455320 2e32302e4236382e 2e323030302e3230 3331303233323231 ffff88042f84adc0: 2f32312030313231 0a333130322f3332 3d3d3d3d3d3d3d00 6f20646165523301 ffff88042f84ade0: 3820657a69732066 6b73617420796220 75665f6672657020 3336382f72657a7a ffff88042f84ae00: 5f7465675f000a38 615f6e7275746572 302b737365726464 3278302f62663178 ffff88042f84ae20: 6461207461203032 3866666666207264 6234386632343038 000000000a306161 ffff88042f84ae40: 0000000000000000 ... ffff88042f84ae80: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 ffff88042f84aea0: ffff88042f84bef8 ffffffff8342d740 ffff88042f84af68 ffff88042f84af38 ffff88042f84aec0: ffffffff8133c807 0000000000000000 0000000000000000 0000000000000000 ffff88042f84aee0: 0000000000000000 0000000000000000 0000000000000000 00000000ffffffff ffff88042f84af00: 0000000000000018 ffff88042f84bef8 ffffffff839f4970 ffff88042f84afd0 ffff88042f84af20: ffff88042f84afa0 ffffffff8133c807 0000000000000000 ffff88042f84afe8 ffff88042f84af40: ffffffff8151fea9 0000000041b58ab3 ffffffff839ff69c ffffffff8151fdf3 ffff88042f84af60: 0000000000000000 0000000000000000 000000002f84aff8 1ffff10085f095f6 ffff88042f84af80: 0000000000000018 ffff88042f84bef8 ffff88040672eac0 ffff88042f84c000 ffff88042f84afa0: ffff88042f84b050 ffffffff8151fea9 0000000041b58ab3 ffffffff839ff69c ffff88042f84afc0: ffffffff8151fdf3 ffff88042f84b0b8 ffff880400000030 ffff88042f84b060 ffff88042f84afe0: ffff88042f84b010 ffff88042f84bef8 ffff88040672eac0 ffff88042f84bff8 ffff88042f84b000: ffff88042f84b028 ffffffff813b9d58 0000000000000000 ffff88042f84afe0 ffff88042f84b020: ffff88042f84b028 ffffffff813b9d58 0000000000000000 ffff88042f84afe0 ffff88042f84b040: ffff88042f84b020 0000000000000009 ffff88042f84b120 ffffffff811504e6 ffff88042f84b060: ffffffff8101d21d ffffffff839fbd23 000000002f84b0a0 0000000000000020 ffff88042f84b080: ffffffff839fbd5b ffffffff839fbd1f 0000000000000005 ffff88042f84a000 ffff88042f84b0a0: ffff88042f84c000 ffff88042419f9b0 0000000000000001 ffff880424198000 ffff88042f84b0c0: ffff8804241a0000 0000000000000000 0000000000000022 ffff88040672eac0 ffff88042f84b0e0: 0000000000000000 ffff88042419f9b8 0000000000000000 0000000000000086 ffff88042f84b100: 0000000000000000 ffff88042f84b3c8 ffffed0085f0967a dffffc0000000000 ffff88042f84b120: ffff88042f84b130 ffffffff811505c4 ffff88042f84b150 ffffffff8238dfb3 ffff88042f84b140: ffff88042f84b1e0 ffff88042f84baa0 ffff88042f84b1d0 ffffffff816221c1 ffff88042f84b160: 0000000000000000 0000000000000000 ffff88042f84b1a0 0000000000000097 ffff88042f84b180: ffff88042f84b2b8 ffff88042419f9b8 ffffed0085f09658 0000000000000010 ffff88042f84b1a0: ffff88042f84b1f0 ffff88042f84b2b8 ffff88042f84baa0 ffff88042f84b3c8 ffff88042f84b1c0: ffffed0085f0967a dffffc0000000000 ffff88042f84b208 ffffffff81622323 ffff88042f84b1e0: ffff88042f84baa0 ffff88042f84baa0 0000000000000008 ffff88042f84b200 ffff88042f84b200: ffffffff811c72cb ffff88042f84b248 ffffffff811c72cb ffff88042f84b2c8 ffff88042f84b220: ffff88042f84b2b8 ffff88042f84b2b8 ffff88042f84b338 ffff88042f84b3c8 ffff88042f84b240: ffffed0085f0967a ffff88042f84b360 ffffffff8100f356 0000000000000000 ffff88042f84b260: 0000000000000000 1ffff10085f09650 ffff88042f84b3d4 1ffff10085f09653 ffff88042f84b280: ffff88042f84b3da 0000000000000004 ffff88042f84b3d0 0000000041b58ab3 ffff88042f84b2a0: ffffffff839f613c ffffffff8100f000 ffffed0085f096a6 0000000000000005 ffff88042f84b2c0: ffff88042f84a000 ffff88042f84c000 ffff88042419f9b0 0000000000000020 ffff88042f84b2e0: ffff88040672eac0 0000000000000000 ffff88042f84ba98 0000000000000000 ffff88042f84b300: ffff88042f84b380 ffffffff823bbf3c 0000000000000000 0000000000000000 ffff88042f84b320: 0000000000000000 ffff88042f84b548 ffff88042f84b530 000000000001bdc0 ffff88042f84b340: ffff88042f84b408 ffff8804222eadc0 1ffff10085f09675 ffff8804222eadc0 ffff88042f84b360: ffff88042f84b430 ffffffff81513f16 0000000000000007 ffffffff811c0a34 ffff88042f84b380: ffff880400000000 ffff88042f84b6e0 0000000000000000 ffff880400000001 ffff88042f84b3a0: 000000000000000c 0000000041b58ab3 ffffffff83a0a369 ffffffff81513ca0 ffff88042f84b3c0: ffff88042f84b3e8 ffff8804222eadc0 000000010000007f ffff88042f000001 ffff88042f84b3e0: ffffffff811c0a2d ffff88042f84b410 ffffffff823bccda 00000000000021be ffff88042f84b400: 0000000000000000 ffff88072594aa80 0000000000000040 ffff88042f84b6e0 ffff88042f84b420: ffff880419217c00 0000000000000000 ffff88042f84b478 ffffffff81514438 ffff88042f84b440: ffffffff00000001 ffffffff811c0a2d ffff88042f84b51c ffff88072594aa80 ffff88042f84b460: ffff88042f84b518 ffff88072594aa80 ffff88042f84b7c0 ffff88042f84b4e8 ffff88042f84b480: ffffffff8150ac7e ffff88042f84b5b0 ffffffff81026e69 ffff88042f84b6e0 ffff88042f84b4a0: 1ffff10085f09699 00000000000000a3 ffff88042f84b51e ffff88042f84b6e0 ffff88042f84b4c0: 1ffff10085f0969f ffff88072594aa80 ffff88042f84b7c0 ffff88042f84b6e0 ffff88042f84b4e0: ffff88042f84b6e0 ffff88042f84b5d8 ffffffff8150b5b3 0000000041b58ab3 ffff88042f84b500: ffffffff83a0d7b0 ffffffff8150b520 0000000100000000 0020400100000009 ffff88042f84b520: 0000000100000000 0000000000000000 0107080800004000 ffffffff811c0a2d ffff88042f84b540: ffffffff811c0a34 ffffffff811c0a34 0000000000000000 0000000000000000 ffff88042f84b560: 0000000000000000 ffff88072594aa80 ffff88072594aa80 ffff88042f84b7c0 ffff88042f84b580: 000000000000464d ffff88042f84b5d8 ffffffff812c58ec ffff88042f84b7c0 ffff88042f84b5a0: ffff88072594aa80 00000000000000a3 ffff88072594aa80 ffff88072594aa80 ffff88042f84b5c0: ffff88042f84b7c0 ffff88072594ad74 0000000000000000 ffff88042f84b620 ffff88042f84b5e0: ffffffff814e7c13 ffff88042f84b7d0 ffff880400000000 ffff88072594aa80 ffff88042f84b600: dffffc0000000000 ffff88042c7e00b0 ffff88042f84b6e0 ffff88042f84b7c0 ffff88042f84b620: ffff88042f84b630 ffffffff8150cb54 ffff88042f84b9b0 ffffffff8102901a ffff88042f84b640: 0000000000000000 ... ffff88042f84b660: 0000000000000000 1ffff10085f096d8 0000000000000000 0000000000000000 ffff88042f84b680: 0000000000000000 0000000000000000 ffff88042f84b7c0 ffff88042f84bef8 ffff88042f84b6a0: ffff88072594aa80 0000000000000000 0000000000000000 ffff88042f84b6e0 ffff88042f84b6c0: 0000000041b58ab3 ffffffff839f20b0 ffffffff81028c50 0000000000000000 ffff88042f84b6e0: 0000000000000002 0000000000000000 dffffc0000000000 000000070000000f ffff88042f84b700: 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1ffff10084833eec ffff88042f853b60 ffff88042419f740: ffff880700000002 ffff880400000000 ffff88042419f820 ffff88042f853440 ffff88042419f760: 0000000041b58ab3 ffffffff839f6109 ffffffff8100c720 ffff88042f853440 ffff88042419f780: 0000000200000000 ffffffff81009e18 0000000100000000 0000000041b58ab3 ffff88042419f7a0: ffffffff839f60e8 ffffffff81009c50 0000000000000008 ffff88042f853660 ffff88042419f7c0: ffff88042419f7e8 ffffffff816213e5 ffff88042f853440 ffff88042f853440 ffff88042419f7e0: 1ffff10084833f00 ffff88042419f968 ffffffff81009b68 ffffffff83c167c0 ffff88042419f800: 0000000041b58ab3 ffffffff839f60e8 ffffffff810099d0 ffff88042419f9b0 ffff88042419f820: 0000000000000021 ffffed0084833f21 000000007fffffff ffff8804a419f9af ffff88042419f840: ffffffff81621106 0000000000000000 dffffc0000000000 ffff88042419f868 ffff88042419f860: ffffffff81621428 ffff88042419f950 ffffffff8153ccb5 1ffff10084833f1c ffff88042419f880: 0000000000000001 0000000000000000 ffff88042419fd60 ffff88042419f9c0 ffff88042419f8a0: ffff88042c3f8168 ffff88042c3f8000 0000000000000000 ffff88042419f918 ffff88042419f8c0: ffffffff814ffc80 0000000000000021 ffff88042419f918 ffff88072594ab08 ffff88042419f8e0: ffff88072594aa80 0000000000000000 ffff88042419f950 ffffffff814ffc80 ffff88042419f900: ffff88042419f968 0000000000000082 0000000000000000 ffff88042419f978 ffff88042419f920: ffff88072594aa80 0000000000000000 ffff88042419f990 ffffffff814ffc80 ffff88042419f940: ffff88072594abd8 0000000000000001 ffff88042419f990 ffffffff8101e082 ffff88042419f960: dffffc0000000000 ffff88042f853648 0000000000000000 ffff88072594ac40 ffff88042419f980: ffff88042f853440 0000000000000000 dffffc0000000000 ffff88042419f9b8 ffff88042419f9a0: ffffffff8101d12c ffff88072594aa80 ffff88042f853440 ffff88042419f9c8 ffff88042419f9c0: ffffffff8101d2a0 ffff88042419fa60 ffffffff8100de4e ffff88042419fa50 ffff88042419f9e0: ffffffff814f793c 00000001812c58ec ffff88042f864f08 ffff880419217c00 ffff88042419fa00: ffffed0085f0c9fe ffff88042f853654 ffff88042f853658 ffffed0085f0a6ca ffff88042419fa20: ffff88042f853650 0000000000000002 ffff88040672ea07 ffffffff83c167c0 ffff88042419fa40: ffffffff83c167c0 ffff880419217c00 ffffffff83c167c0 ffff88072594aa80 ffff88042419fa60: ffff88042419fa78 ffffffff814eaff9 ffff88042f864f00 ffff88042419faa8 ffff88042419fa80: ffffffff814f8217 ffff880419217c00 ffff880419217c00 ffff88042f864f08 ffff88042419faa0: dffffc0000000000 ffff88042419fb00 ffffffff814f92a4 ffff88070972d458 ffff88042419fac0: ffff88042419fe40 ffff88072594aaa0 ffffffff815af787 ffff88042f864f08 ffff88042419fae0: ffff880419217c00 ffff880419217c00 ffff88072594aa80 ffffffff814f8b90 ffff88042419fb00: ffff88042419fb48 ffffffff814e1b2e ffff88042419fd70 ffff88042f864f10 ffff88042419fb20: ffff88042419fca0 ffffffff814e1950 ffff88042419fcb8 0000000000000001 ffff88042419fb40: ffffffff814e6a70 ffff88042419fb78 ffffffff814e6b6e ffff88042419fb78 ffff88042419fb60: 0000000000000246 ffff88042419fc18 1ffff10084833f7c ffff88042419fbb8 ffff88042419fb80: ffffffff813b1163 ffff88042419fca0 ffffffff814e6a70 ffff88042419fc40 ffff88042419fba0: 0000000000000007 1ffff10084833f7c 0000000000000001 ffff88042419fc68 ffff88042419fbc0: ffffffff813b1472 ffff88042419fbf8 0000000000000246 ffffffff83a77980 ffff88042419fbe0: 0000000041b58ab3 ffffffff83a05fdf ffffffff813b12c0 ffff88042419fc18 ffff88042419fc00: 0000000000000000 ... ffff88042419fc20: ffffffff813b10d3 ffffffff815b1920 1ffff10084833f88 ffff88042419fce0 ffff88042419fc40: ffffed0080ce5d5e 0000000000000007 ffff88042419fce0 1ffff10084833f90 ffff88042419fc60: ffff88040672eac0 ffff88042419fd08 ffffffff814e25e1 ffff88040672eaf4 ffff88042419fc80: 0000000041b58ab3 ffffffff839ff26b ffffffff814e2530 0000000000000000 ffff88042419fca0: ffff88040672eac0 ffffffff814e1950 ffff88042419fd70 00000000fffffffd ffff88042419fcc0: ffff88042419fda0 00007ffc0d8588d0 0000000040082404 ffff88070972d458 ffff88042419fce0: ffff880419217c00 ffffed0083242f8f ffff88040672eac0 dffffc0000000000 ffff88042419fd00: ffff88072594aca8 ffff88042419fe18 ffffffff814e27dc ffff880419217c78 ffff88042419fd20: 1ffff10084833faa 0000000000000000 ffffffff814f8b90 ffff88072594aa80 ffff88042419fd40: ffff880419217c90 ffff88042419fd70 0000000041b58ab3 ffffffff83a0a00b ffff88042419fd60: ffffffff814e2630 ffffffff83a12428 ffff88072594aa80 ffffffff814f8b90 ffff88042419fd80: 0000000000000000 0000000000000000 0000000041b58ab3 ffffffff83a142a0 ffff88042419fda0: ffff88070c3a8a00 1ffff10084833fc0 0000000000000000 ffffffff814e1950 ffff88042419fdc0: ffff88042419fd70 ffff880400000000 ffffffff81694cc2 ffff88042419fe10 ffff88042419fde0: ffff88041ed2b600 ffff8807282b0020 ffff88072594aa80 ffff880419217c08 ffff88042419fe00: ffffffff814e29b0 dffffc0000000000 ffff88072594aca8 ffff88042419fe38 ffff88042419fe20: ffffffff814e2a3f ffff880419217c00 ffff88072594aa80 ffff88042419fe70 ffff88042419fe40: ffffffff814e1d53 ffff88072594aa80 ffff880419217c00 ffff88040672f378 ffff88042419fe60: dffffc0000000000 00007f382af1c0a4 ffff88042419fea0 ffffffff814ff76b ffff88042419fe80: 0000000000000001 1ffff10084833fd8 00007ffc0d8588cc 0000000000000020 ffff88042419fea0: ffff88042419ff48 ffffffff8126fb41 00007f382af1c0a4 ffff88040672eac0 ffff88042419fec0: 0000000041b58ab3 ffffffff83a00b7c ffffffff8126f3e0 ffff88040672eac0 ffff88042419fee0: 0000000000000000 0000000000000008 ffff88070972d458 ffffffff8100201a ffff88042419ff00: ffff88040672eac0 00007f382af1c0a4 00007f382af1c120 00007f382af1c0a4 ffff88042419ff20: 0000000000000000 0000000000401810 00007ffc0d85ac80 0000000000000000 ffff88042419ff40: 0000000000000000 00007ffc0d858900 ffffffff832abc2a 0000000000000000 ffff88042419ff60: 0000000000000000 00007ffc0d85ac80 0000000000401810 00007ffc0d858900 ffff88042419ff80: 0000000000000000 0000000000000202 00007f382af1c0a4 00007f382af1c120 ffff88042419ffa0: 00007f382af1c0a4 ffffffffffffffda 00007f382ac68a4a 0000000000000001 ffff88042419ffc0: 00007ffc0d8588cc 0000000000000020 000000000000009d 00007f382ac68a4a ffff88042419ffe0: 0000000000000033 0000000000000202 00007ffc0d8588e8 000000000000002b 3Memory state around the buggy address: 3 ffff88042f84b980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3 ffff88042f84ba00: 00 00 00 00 00 f1 f1 f1 f1 00 f4 f4 f4 f2 f2 f2 3>ffff88042f84ba80: f2 00 00 f4 f4 f2 f2 f2 f2 00 00 f4 f4 f3 f3 f3 3 ^ 3 ffff88042f84bb00: f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3 ffff88042f84bb80: f1 f1 f1 f1 f1 f1 f1 f1 00 f4 f4 f4 f2 f2 f2 f2 3==================================================================