Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761049AbcJRN2f convert rfc822-to-8bit (ORCPT ); Tue, 18 Oct 2016 09:28:35 -0400 Received: from mx4-phx2.redhat.com ([209.132.183.25]:44047 "EHLO mx4-phx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759300AbcJRN21 (ORCPT ); Tue, 18 Oct 2016 09:28:27 -0400 Date: Tue, 18 Oct 2016 09:28:12 -0400 (EDT) From: CAI Qian To: rtc-linux@googlegroups.com, linux-kernel Cc: Alessandro Zummo , Alexandre Belloni Message-ID: <2061831780.279821.1476797292640.JavaMail.zimbra@redhat.com> In-Reply-To: <406701477.279464.1476797119876.JavaMail.zimbra@redhat.com> Subject: [4.9-rc1] kernel panic from `cat /proc/driver/rtc` MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT X-Originating-IP: [10.18.41.13] X-Mailer: Zimbra 8.0.6_GA_5922 (ZimbraWebClient - GC45 (Linux)/8.0.6_GA_5922) Thread-Topic: kernel panic from `cat /proc/driver/rtc` Thread-Index: utyBRsXc+K1zlRvbqLpTACYimDo2Ag== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 13966 Lines: 181 This looks like new introduced in the 4.9 merge window. I have never saw any of those while testing v4.8. CAI Qian $ cat /proc/driver/rtc [ 7890.728704] UBSAN: Undefined behaviour in drivers/rtc/rtc-cmos.c:433:10 [ 7890.736088] member access within null pointer of type 'struct cmos_rtc' [ 7890.743472] CPU: 81 PID: 32522 Comm: proc01 Tainted: G W 4.9.0-rc1 #32 [ 7890.752017] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS GRRFSDP1.86B.0271.R00.1510301446 10/30/2015 [ 7890.763373] ffff88080a54f868 ffffffff81d23184 0000000041b58ab3 ffffffff8334713f [ 7890.771670] ffffffff81d230c4 ffff88080a54f890 ffff88080a54f840 ffff88081f324900 [ 7890.779966] ffffffff82ff7b40 ffffffff831279a0 00000000000001b1 00000000d3274681 [ 7890.788262] Call Trace: [ 7890.790993] [] dump_stack+0xc0/0x12c [ 7890.796825] [] ? _atomic_dec_and_lock+0xc4/0xc4 [ 7890.803723] [] ubsan_epilogue+0xd/0x8a [ 7890.809748] [] __ubsan_handle_type_mismatch+0x166/0x434 [ 7890.817421] [] ? ubsan_epilogue+0x8a/0x8a [ 7890.823738] [] ? __this_cpu_preempt_check+0x13/0x20 [ 7890.831025] [] ? trace_hardirqs_on_caller+0x520/0x720 [ 7890.838509] [] cmos_procfs+0x1b1/0x1e0 [ 7890.844535] [] ? rtc_handler+0x140/0x140 [ 7890.850754] [] rtc_proc_show+0x180/0x640 [ 7890.856973] [] ? rtc_proc_open+0xd0/0xd0 [ 7890.863196] [] ? kasan_kmalloc+0xad/0xe0 [ 7890.869419] [] seq_read+0x334/0x1400 [ 7890.875252] [] ? seq_hlist_start_percpu+0x4a0/0x4a0 [ 7890.882538] [] ? save_stack_trace+0x1b/0x20 [ 7890.889050] [] ? save_stack+0x46/0xd0 [ 7890.894979] [] ? kasan_slab_free+0x71/0xb0 [ 7890.901393] [] ? kmem_cache_free+0xe9/0x660 [ 7890.907905] [] ? putname+0xe0/0x120 [ 7890.913639] [] ? print_usage_bug+0x700/0x700 [ 7890.920250] [] proc_reg_read+0x110/0x270 [ 7890.926470] [] __vfs_read+0x106/0x990 [ 7890.932398] [] ? do_iter_readv_writev+0x840/0x840 [ 7890.939490] [] ? selinux_file_permission+0x3c5/0x550 [ 7890.946874] [] ? security_file_permission+0x176/0x220 [ 7890.954354] [] ? rw_verify_area+0xd8/0x380 [ 7890.960767] [] vfs_read+0x118/0x400 [ 7890.966500] [] SyS_read+0xdf/0x1d0 [ 7890.972137] [] ? vfs_copy_file_range+0x8f0/0x8f0 [ 7890.979132] [] ? __this_cpu_preempt_check+0x13/0x20 [ 7890.986416] [] ? vfs_copy_file_range+0x8f0/0x8f0 [ 7890.993412] [] do_syscall_64+0x19d/0x540 [ 7890.999631] [] entry_SYSCALL64_slow_path+0x25/0x25 [ 7891.006820] ================================================================================ [ 7891.016322] kasan: CONFIG_KASAN_INLINE enabled [ 7891.021292] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 7891.029371] general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC KASAN [ 7891.037722] Modules linked in: tun ext4 jbd2 mbcache loop veth ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter xt_conntrack nf_nat nf_conntrack br_netfilter bridge stp llc overlay intel_rapl sb_edac edac_core x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd intel_uncore iTCO_wdt iTCO_vendor_support pcspkr i2c_i801 i2c_smbus sg mei_me mei lpc_ich shpchp ipmi_ssif mxm_wmi ipmi_si ipmi_msghandler wmi acpi_power_meter acpi_pad nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c sr_mod sd_mod cdrom mgag200 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm crc32c_intel drm ixgbe serio_raw ahci libahci libata mdio ptp i2c_core pps_core dca fjes dm_mirror dm_region_hash dm_log dm_mod [ 7891.127218] CPU: 81 PID: 32522 Comm: proc01 Tainted: G W 4.9.0-rc1 #32 [ 7891.135764] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS GRRFSDP1.86B.0271.R00.1510301446 10/30/2015 [ 7891.147124] task: ffff88081f324900 task.stack: ffff88080a548000 [ 7891.153731] RIP: 0010:[] [] cmos_procfs+0xb0/0x1e0 [ 7891.162677] RSP: 0018:ffff88080a54f938 EFLAGS: 00010246 [ 7891.168605] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 7891.176569] RDX: 0000000000000000 RSI: ffffffff82e9a500 RDI: ffffed01014a9f20 [ 7891.184534] RBP: ffff88080a54f990 R08: ffff88081f324900 R09: 0000000000000007 [ 7891.192499] R10: ffff88080a54f780 R11: 0000000000000006 R12: 0000000000000002 [ 7891.200463] R13: ffffffff831272e0 R14: 1ffff101014a9f39 R15: ffffffff83127d60 [ 7891.208430] FS: 00007fe516b93800(0000) GS:ffff880e56800000(0000) knlGS:0000000000000000 [ 7891.217461] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 7891.223873] CR2: 00007f153a7200a0 CR3: 0000000e48f80000 CR4: 00000000003406e0 [ 7891.231838] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 7891.239802] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 7891.247765] Stack: [ 7891.250006] 0000012300000001 ffff880800000000 1ffff101014a9f39 00000000d3274681 [ 7891.258299] 00000000d3274681 ffff880e108a9a40 ffff880e108a9a40 ffff88084745b300 [ 7891.266597] ffffffff8253b1a0 1ffff101014a9f39 ffffffff83127d60 ffff88080a54fad0 [ 7891.274891] Call Trace: [ 7891.277619] [] ? rtc_handler+0x140/0x140 [ 7891.283839] [] rtc_proc_show+0x180/0x640 [ 7891.290058] [] ? rtc_proc_open+0xd0/0xd0 [ 7891.296278] [] ? kasan_kmalloc+0xad/0xe0 [ 7891.302497] [] seq_read+0x334/0x1400 [ 7891.308328] [] ? seq_hlist_start_percpu+0x4a0/0x4a0 [ 7891.315613] [] ? save_stack_trace+0x1b/0x20 [ 7891.322122] [] ? save_stack+0x46/0xd0 [ 7891.328050] [] ? kasan_slab_free+0x71/0xb0 [ 7891.334463] [] ? kmem_cache_free+0xe9/0x660 [ 7891.340972] [] ? putname+0xe0/0x120 [ 7891.346707] [] ? print_usage_bug+0x700/0x700 [ 7891.353313] [] proc_reg_read+0x110/0x270 [ 7891.359532] [] __vfs_read+0x106/0x990 [ 7891.365459] [] ? do_iter_readv_writev+0x840/0x840 [ 7891.372553] [] ? selinux_file_permission+0x3c5/0x550 [ 7891.379936] [] ? security_file_permission+0x176/0x220 [ 7891.387415] [] ? rw_verify_area+0xd8/0x380 [ 7891.393830] [] vfs_read+0x118/0x400 [ 7891.399564] [] SyS_read+0xdf/0x1d0 [ 7891.405202] [] ? vfs_copy_file_range+0x8f0/0x8f0 [ 7891.412197] [] ? __this_cpu_preempt_check+0x13/0x20 [ 7891.419483] [] ? vfs_copy_file_range+0x8f0/0x8f0 [ 7891.426478] [] do_syscall_64+0x19d/0x540 [ 7891.432699] [] entry_SYSCALL64_slow_path+0x25/0x25 [ 7891.439881] Code: c7 c0 20 73 12 83 49 c7 c5 e0 72 12 83 4c 0f 49 e8 48 85 db 0f 84 04 01 00 00 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 dc 00 00 00 48 8b 1b 48 85 db 0f 84 bd 00 00 [ 7891.461643] RIP [] cmos_procfs+0xb0/0x1e0 [ 7891.467970] RSP [ 7891.478688] ---[ end trace 724fbd49872953c3 ]--- [ 7891.483921] Kernel panic - not syncing: Fatal exception [ 7891.489875] Kernel Offset: disabled [ 7891.493787] ---[ end Kernel panic - not syncing: Fatal exception [ 7891.500491] ------------[ cut here ]------------ [ 7891.505648] WARNING: CPU: 81 PID: 32522 at arch/x86/kernel/smp.c:127 native_smp_send_reschedule+0x107/0x150 [ 7891.516521] Modules linked in: tun ext4 jbd2 mbcache loop veth ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter xt_conntrack nf_nat nf_conntrack br_netfilter bridge stp llc overlay intel_rapl sb_edac edac_core x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd intel_uncore iTCO_wdt iTCO_vendor_support pcspkr i2c_i801 i2c_smbus sg mei_me mei lpc_ich shpchp ipmi_ssif mxm_wmi ipmi_si ipmi_msghandler wmi acpi_power_meter acpi_pad nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c sr_mod sd_mod cdrom mgag200 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm crc32c_intel drm ixgbe serio_raw ahci libahci libata mdio ptp i2c_core pps_core dca fjes dm_mirror dm_region_hash dm_log dm_mod [ 7891.605894] CPU: 81 PID: 32522 Comm: proc01 Tainted: G D W 4.9.0-rc1 #32 [ 7891.614440] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS GRRFSDP1.86B.0271.R00.1510301446 10/30/2015 [ 7891.625798] ffff880e56807a00 ffffffff81d23184 0000000041b58ab3 ffffffff8334713f [ 7891.634094] ffffffff81d230c4 000000000333a700 ffff880e568079c0 ffffffff81293d7c [ 7891.642390] 00000000d3274681 ffff880e56807a78 0000000000000051 0000000000007f0a [ 7891.650686] Call Trace: [ 7891.653413] [ 7891.655561] [] dump_stack+0xc0/0x12c [ 7891.661401] [] ? _atomic_dec_and_lock+0xc4/0xc4 [ 7891.668302] [] ? rcu_read_unlock+0x3c/0x80 [ 7891.674719] [] __warn+0x19e/0x1d0 [ 7891.680259] [] warn_slowpath_null+0x1d/0x20 [ 7891.686769] [] native_smp_send_reschedule+0x107/0x150 [ 7891.694253] [] try_to_wake_up+0x9fb/0x10d0 [ 7891.700665] [] ? migrate_swap_stop+0xa70/0xa70 [ 7891.707468] [] default_wake_function+0x42/0x70 [ 7891.714271] [] __wake_up_common+0xe5/0x210 [ 7891.720688] [] ? ep_poll_callback+0x5ef/0x9d0 [ 7891.727391] [] __wake_up_locked+0x13/0x20 [ 7891.733707] [] ep_poll_callback+0x271/0x9d0 [ 7891.740218] [] ? ep_poll_callback+0x4e0/0x9d0 [ 7891.746921] [] ? ep_poll_safewake+0x60/0x60 [ 7891.753433] [] ? __wake_up+0x23/0x50 [ 7891.759264] [] __wake_up_common+0xe5/0x210 [ 7891.765679] [] __wake_up+0x39/0x50 [ 7891.771320] [] wake_up_klogd_work_func+0x4c/0x60 [ 7891.778319] [] irq_work_run_list+0xdd/0x1a0 [ 7891.784829] [] irq_work_tick+0x166/0x240 [ 7891.791051] [] update_process_times+0x42/0x60 [ 7891.797756] [] tick_sched_handle+0x92/0x170 [ 7891.804267] [] tick_sched_timer+0x39/0xb0 [ 7891.810584] [] __hrtimer_run_queues+0x3d7/0x12e0 [ 7891.817580] [] ? hrtimer_interrupt+0x16c/0x5b0 [ 7891.824381] [] ? tick_sched_do_timer+0x200/0x200 [ 7891.831378] [] ? enqueue_hrtimer+0x5a0/0x5a0 [ 7891.837983] [] ? hrtimer_interrupt+0x16c/0x5b0 [ 7891.844784] [] hrtimer_interrupt+0x23b/0x5b0 [ 7891.851393] [] local_apic_timer_interrupt+0x9d/0x170 [ 7891.858778] [] smp_apic_timer_interrupt+0x80/0xb0 [ 7891.865869] [] apic_timer_interrupt+0x93/0xa0 [ 7891.872572] [ 7891.874720] [] ? panic+0x354/0x3e1 [ 7891.880364] [] ? panic+0x351/0x3e1 [ 7891.886002] [] ? percpu_up_read_preempt_enable.constprop.25+0xb9/0xb9 [ 7891.895035] [] oops_end+0xe2/0xf0 [ 7891.900574] [] die+0x50/0x80 [ 7891.905631] [] do_general_protection+0x242/0x430 [ 7891.912627] [] general_protection+0x22/0x30 [ 7891.919139] [] ? cmos_procfs+0xb0/0x1e0 [ 7891.925261] [] ? cmos_procfs+0x1b1/0x1e0 [ 7891.931480] [] ? rtc_handler+0x140/0x140 [ 7891.937700] [] rtc_proc_show+0x180/0x640 [ 7891.943919] [] ? rtc_proc_open+0xd0/0xd0 [ 7891.950139] [] ? kasan_kmalloc+0xad/0xe0 [ 7891.956359] [] seq_read+0x334/0x1400 [ 7891.962192] [] ? seq_hlist_start_percpu+0x4a0/0x4a0 [ 7891.969477] [] ? save_stack_trace+0x1b/0x20 [ 7891.975989] [] ? save_stack+0x46/0xd0 [ 7891.981918] [] ? kasan_slab_free+0x71/0xb0 [ 7891.988332] [] ? kmem_cache_free+0xe9/0x660 [ 7891.994842] [] ? putname+0xe0/0x120 [ 7892.000577] [] ? print_usage_bug+0x700/0x700 [ 7892.007185] [] proc_reg_read+0x110/0x270 [ 7892.013404] [] __vfs_read+0x106/0x990 [ 7892.019332] [] ? do_iter_readv_writev+0x840/0x840 [ 7892.026426] [] ? selinux_file_permission+0x3c5/0x550 [ 7892.033802] [] ? security_file_permission+0x176/0x220 [ 7892.041282] [] ? rw_verify_area+0xd8/0x380 [ 7892.047697] [] vfs_read+0x118/0x400 [ 7892.053432] [] SyS_read+0xdf/0x1d0 [ 7892.059069] [] ? vfs_copy_file_range+0x8f0/0x8f0 [ 7892.066066] [] ? __this_cpu_preempt_check+0x13/0x20 [ 7892.073352] [] ? vfs_copy_file_range+0x8f0/0x8f0 [ 7892.080348] [] do_syscall_64+0x19d/0x540 [ 7892.086567] [] entry_SYSCALL64_slow_path+0x25/0x25 [ 7892.093756] ---[ end trace 724fbd49872953c4 ]---