From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Sender: rtc-linux@googlegroups.com Received: from mx6-phx2.redhat.com (mx6-phx2.redhat.com. [209.132.183.39]) by gmr-mx.google.com with ESMTPS id o13si303702itc.3.2016.10.18.11.47.58 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 18 Oct 2016 11:47:58 -0700 (PDT) Date: Tue, 18 Oct 2016 14:47:55 -0400 (EDT) From: CAI Qian To: Rob Herring , Alessandro Zummo , Alexandre Belloni Cc: Greg Kroah-Hartman , rtc-linux@googlegroups.com, linux-kernel Message-ID: <1882425827.361582.1476816475343.JavaMail.zimbra@redhat.com> In-Reply-To: <2061831780.279821.1476797292640.JavaMail.zimbra@redhat.com> References: <2061831780.279821.1476797292640.JavaMail.zimbra@redhat.com> Subject: [rtc-linux] Re: [4.9-rc1] kernel panic from `cat /proc/driver/rtc` MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Reply-To: rtc-linux@googlegroups.com List-ID: List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , It turns out this panic can only be reproduced with CONFIG_DEBUG_TEST_DRIVE= R_REMOVE enabled. There are some errors in dmesg when the config is enabled. [ =C2=A0 71.215937] rtc_cmos 00:00: RTC can wake from S4 [ =C2=A0 71.218096] input: AT Translated Set 2 keyboard as /devices/platfor= m/i8042/serio1/input/input2 [ =C2=A0 71.232591] rtc_cmos 00:00: rtc core: registered rtc_cmos as rtc0 [ =C2=A0 71.239518] rtc_cmos 00:00: alarms up to one month, y3k, 114 bytes = nvram, hpet irqs [ =C2=A0 71.248160] rtc_cmos 00:00: RTC can wake from S4 [ =C2=A0 71.267680] rtc_cmos: probe of 00:00 failed with error -16 It works fine without it. $ cat /proc/driver/rtc=20 rtc_time=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: 14:30:56 rtc_date=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: 2016-10-18 alrm_time=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: 19:48:53 alrm_date=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: 2016-10-18 alarm_IRQ=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: no alrm_pending=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: no update IRQ enabled=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: no periodic IRQ enabled=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: no periodic IRQ frequency=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: 102= 4 max user IRQ frequency=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: 64 24hr=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0: yes periodic_IRQ=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: no update_IRQ=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: no HPET_emulated=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: yes BCD=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0: yes DST_enable=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: no periodic_freq=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: 1024 batt_status=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0: okay =C2=A0=C2=A0 CAI Qian ----- Original Message ----- > From: "CAI Qian" > To: rtc-linux@googlegroups.com, "linux-kernel" > Cc: "Alessandro Zummo" , "Alexandre Belloni" > Sent: Tuesday, October 18, 2016 9:28:12 AM > Subject: [4.9-rc1] kernel panic from `cat /proc/driver/rtc` >=20 > This looks like new introduced in the 4.9 merge window. I have never saw = any > of > those while testing v4.8. > =C2=A0 =C2=A0CAI Qian >=20 > $ cat /proc/driver/rtc >=20 > [ 7890.728704] UBSAN: Undefined behaviour in drivers/rtc/rtc-cmos.c:433:1= 0 > [ 7890.736088] member access within null pointer of type 'struct cmos_rtc= ' > [ 7890.743472] CPU: 81 PID: 32522 Comm: proc01 Tainted: G =C2=A0 =C2=A0 = =C2=A0 =C2=A0W > 4.9.0-rc1 #32 > [ 7890.752017] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS > GRRFSDP1.86B.0271.R00.1510301446 10/30/2015 > [ 7890.763373] =C2=A0ffff88080a54f868 ffffffff81d23184 0000000041b58ab3 > ffffffff8334713f > [ 7890.771670] =C2=A0ffffffff81d230c4 ffff88080a54f890 ffff88080a54f840 > ffff88081f324900 > [ 7890.779966] =C2=A0ffffffff82ff7b40 ffffffff831279a0 00000000000001b1 > 00000000d3274681 > [ 7890.788262] Call Trace: > [ 7890.790993] =C2=A0[] dump_stack+0xc0/0x12c > [ 7890.796825] =C2=A0[] ? _atomic_dec_and_lock+0xc4/0xc= 4 > [ 7890.803723] =C2=A0[] ubsan_epilogue+0xd/0x8a > [ 7890.809748] =C2=A0[] __ubsan_handle_type_mismatch+0x= 166/0x434 > [ 7890.817421] =C2=A0[] ? ubsan_epilogue+0x8a/0x8a > [ 7890.823738] =C2=A0[] ? __this_cpu_preempt_check+0x13= /0x20 > [ 7890.831025] =C2=A0[] ? trace_hardirqs_on_caller+0x52= 0/0x720 > [ 7890.838509] =C2=A0[] cmos_procfs+0x1b1/0x1e0 > [ 7890.844535] =C2=A0[] ? rtc_handler+0x140/0x140 > [ 7890.850754] =C2=A0[] rtc_proc_show+0x180/0x640 > [ 7890.856973] =C2=A0[] ? rtc_proc_open+0xd0/0xd0 > [ 7890.863196] =C2=A0[] ? kasan_kmalloc+0xad/0xe0 > [ 7890.869419] =C2=A0[] seq_read+0x334/0x1400 > [ 7890.875252] =C2=A0[] ? seq_hlist_start_percpu+0x4a0/= 0x4a0 > [ 7890.882538] =C2=A0[] ? save_stack_trace+0x1b/0x20 > [ 7890.889050] =C2=A0[] ? save_stack+0x46/0xd0 > [ 7890.894979] =C2=A0[] ? kasan_slab_free+0x71/0xb0 > [ 7890.901393] =C2=A0[] ? kmem_cache_free+0xe9/0x660 > [ 7890.907905] =C2=A0[] ? putname+0xe0/0x120 > [ 7890.913639] =C2=A0[] ? print_usage_bug+0x700/0x700 > [ 7890.920250] =C2=A0[] proc_reg_read+0x110/0x270 > [ 7890.926470] =C2=A0[] __vfs_read+0x106/0x990 > [ 7890.932398] =C2=A0[] ? do_iter_readv_writev+0x840/0x= 840 > [ 7890.939490] =C2=A0[] ? selinux_file_permission+0x3c5= /0x550 > [ 7890.946874] =C2=A0[] ? security_file_permission+0x17= 6/0x220 > [ 7890.954354] =C2=A0[] ? rw_verify_area+0xd8/0x380 > [ 7890.960767] =C2=A0[] vfs_read+0x118/0x400 > [ 7890.966500] =C2=A0[] SyS_read+0xdf/0x1d0 > [ 7890.972137] =C2=A0[] ? vfs_copy_file_range+0x8f0/0x8= f0 > [ 7890.979132] =C2=A0[] ? __this_cpu_preempt_check+0x13= /0x20 > [ 7890.986416] =C2=A0[] ? vfs_copy_file_range+0x8f0/0x8= f0 > [ 7890.993412] =C2=A0[] do_syscall_64+0x19d/0x540 > [ 7890.999631] =C2=A0[] entry_SYSCALL64_slow_path+0x25/= 0x25 > [ 7891.006820] > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D > [ 7891.016322] kasan: CONFIG_KASAN_INLINE enabled > [ 7891.021292] kasan: GPF could be caused by NULL-ptr deref or user memor= y > 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_i= 801 > 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 lo= ckd > 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_cor= e > pps_core dca fjes dm_mirror dm_region_hash dm_log dm_mod > [ 7891.127218] CPU: 81 PID: 32522 Comm: proc01 Tainted: G =C2=A0 =C2=A0 = =C2=A0 =C2=A0W > 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:[] =C2=A0[] > cmos_procfs+0xb0/0x1e0 > [ 7891.162677] RSP: 0018:ffff88080a54f938 =C2=A0EFLAGS: 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: =C2=A000007fe516b93800(0000) GS:ffff880e56800000(0000) > knlGS:0000000000000000 > [ 7891.217461] CS: =C2=A00010 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] =C2=A00000012300000001 ffff880800000000 1ffff101014a9f39 > 00000000d3274681 > [ 7891.258299] =C2=A000000000d3274681 ffff880e108a9a40 ffff880e108a9a40 > ffff88084745b300 > [ 7891.266597] =C2=A0ffffffff8253b1a0 1ffff101014a9f39 ffffffff83127d60 > ffff88080a54fad0 > [ 7891.274891] Call Trace: > [ 7891.277619] =C2=A0[] ? rtc_handler+0x140/0x140 > [ 7891.283839] =C2=A0[] rtc_proc_show+0x180/0x640 > [ 7891.290058] =C2=A0[] ? rtc_proc_open+0xd0/0xd0 > [ 7891.296278] =C2=A0[] ? kasan_kmalloc+0xad/0xe0 > [ 7891.302497] =C2=A0[] seq_read+0x334/0x1400 > [ 7891.308328] =C2=A0[] ? seq_hlist_start_percpu+0x4a0/= 0x4a0 > [ 7891.315613] =C2=A0[] ? save_stack_trace+0x1b/0x20 > [ 7891.322122] =C2=A0[] ? save_stack+0x46/0xd0 > [ 7891.328050] =C2=A0[] ? kasan_slab_free+0x71/0xb0 > [ 7891.334463] =C2=A0[] ? kmem_cache_free+0xe9/0x660 > [ 7891.340972] =C2=A0[] ? putname+0xe0/0x120 > [ 7891.346707] =C2=A0[] ? print_usage_bug+0x700/0x700 > [ 7891.353313] =C2=A0[] proc_reg_read+0x110/0x270 > [ 7891.359532] =C2=A0[] __vfs_read+0x106/0x990 > [ 7891.365459] =C2=A0[] ? do_iter_readv_writev+0x840/0x= 840 > [ 7891.372553] =C2=A0[] ? selinux_file_permission+0x3c5= /0x550 > [ 7891.379936] =C2=A0[] ? security_file_permission+0x17= 6/0x220 > [ 7891.387415] =C2=A0[] ? rw_verify_area+0xd8/0x380 > [ 7891.393830] =C2=A0[] vfs_read+0x118/0x400 > [ 7891.399564] =C2=A0[] SyS_read+0xdf/0x1d0 > [ 7891.405202] =C2=A0[] ? vfs_copy_file_range+0x8f0/0x8= f0 > [ 7891.412197] =C2=A0[] ? __this_cpu_preempt_check+0x13= /0x20 > [ 7891.419483] =C2=A0[] ? vfs_copy_file_range+0x8f0/0x8= f0 > [ 7891.426478] =C2=A0[] do_syscall_64+0x19d/0x540 > [ 7891.432699] =C2=A0[] 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 4= 8 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 =C2=A0[] cmos_procfs+0xb0/0x1e0 > [ 7891.467970] =C2=A0RSP > [ 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_i= 801 > 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 lo= ckd > 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_cor= e > pps_core dca fjes dm_mirror dm_region_hash dm_log dm_mod > [ 7891.605894] CPU: 81 PID: 32522 Comm: proc01 Tainted: G =C2=A0 =C2=A0 = =C2=A0D 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] =C2=A0ffff880e56807a00 ffffffff81d23184 0000000041b58ab3 > ffffffff8334713f > [ 7891.634094] =C2=A0ffffffff81d230c4 000000000333a700 ffff880e568079c0 > ffffffff81293d7c > [ 7891.642390] =C2=A000000000d3274681 ffff880e56807a78 0000000000000051 > 0000000000007f0a > [ 7891.650686] Call Trace: > [ 7891.653413] =C2=A0 [ 7891.655561] =C2=A0[] > dump_stack+0xc0/0x12c > [ 7891.661401] =C2=A0[] ? _atomic_dec_and_lock+0xc4/0xc= 4 > [ 7891.668302] =C2=A0[] ? rcu_read_unlock+0x3c/0x80 > [ 7891.674719] =C2=A0[] __warn+0x19e/0x1d0 > [ 7891.680259] =C2=A0[] warn_slowpath_null+0x1d/0x20 > [ 7891.686769] =C2=A0[] native_smp_send_reschedule+0x10= 7/0x150 > [ 7891.694253] =C2=A0[] try_to_wake_up+0x9fb/0x10d0 > [ 7891.700665] =C2=A0[] ? migrate_swap_stop+0xa70/0xa70 > [ 7891.707468] =C2=A0[] default_wake_function+0x42/0x70 > [ 7891.714271] =C2=A0[] __wake_up_common+0xe5/0x210 > [ 7891.720688] =C2=A0[] ? ep_poll_callback+0x5ef/0x9d0 > [ 7891.727391] =C2=A0[] __wake_up_locked+0x13/0x20 > [ 7891.733707] =C2=A0[] ep_poll_callback+0x271/0x9d0 > [ 7891.740218] =C2=A0[] ? ep_poll_callback+0x4e0/0x9d0 > [ 7891.746921] =C2=A0[] ? ep_poll_safewake+0x60/0x60 > [ 7891.753433] =C2=A0[] ? __wake_up+0x23/0x50 > [ 7891.759264] =C2=A0[] __wake_up_common+0xe5/0x210 > [ 7891.765679] =C2=A0[] __wake_up+0x39/0x50 > [ 7891.771320] =C2=A0[] wake_up_klogd_work_func+0x4c/0x= 60 > [ 7891.778319] =C2=A0[] irq_work_run_list+0xdd/0x1a0 > [ 7891.784829] =C2=A0[] irq_work_tick+0x166/0x240 > [ 7891.791051] =C2=A0[] update_process_times+0x42/0x60 > [ 7891.797756] =C2=A0[] tick_sched_handle+0x92/0x170 > [ 7891.804267] =C2=A0[] tick_sched_timer+0x39/0xb0 > [ 7891.810584] =C2=A0[] __hrtimer_run_queues+0x3d7/0x12= e0 > [ 7891.817580] =C2=A0[] ? hrtimer_interrupt+0x16c/0x5b0 > [ 7891.824381] =C2=A0[] ? tick_sched_do_timer+0x200/0x2= 00 > [ 7891.831378] =C2=A0[] ? enqueue_hrtimer+0x5a0/0x5a0 > [ 7891.837983] =C2=A0[] ? hrtimer_interrupt+0x16c/0x5b0 > [ 7891.844784] =C2=A0[] hrtimer_interrupt+0x23b/0x5b0 > [ 7891.851393] =C2=A0[] local_apic_timer_interrupt+0x9d= /0x170 > [ 7891.858778] =C2=A0[] smp_apic_timer_interrupt+0x80/0= xb0 > [ 7891.865869] =C2=A0[] apic_timer_interrupt+0x93/0xa0 > [ 7891.872572] =C2=A0 [ 7891.874720] =C2=A0[] ? > panic+0x354/0x3e1 > [ 7891.880364] =C2=A0[] ? panic+0x351/0x3e1 > [ 7891.886002] =C2=A0[] ? > percpu_up_read_preempt_enable.constprop.25+0xb9/0xb9 > [ 7891.895035] =C2=A0[] oops_end+0xe2/0xf0 > [ 7891.900574] =C2=A0[] die+0x50/0x80 > [ 7891.905631] =C2=A0[] do_general_protection+0x242/0x4= 30 > [ 7891.912627] =C2=A0[] general_protection+0x22/0x30 > [ 7891.919139] =C2=A0[] ? cmos_procfs+0xb0/0x1e0 > [ 7891.925261] =C2=A0[] ? cmos_procfs+0x1b1/0x1e0 > [ 7891.931480] =C2=A0[] ? rtc_handler+0x140/0x140 > [ 7891.937700] =C2=A0[] rtc_proc_show+0x180/0x640 > [ 7891.943919] =C2=A0[] ? rtc_proc_open+0xd0/0xd0 > [ 7891.950139] =C2=A0[] ? kasan_kmalloc+0xad/0xe0 > [ 7891.956359] =C2=A0[] seq_read+0x334/0x1400 > [ 7891.962192] =C2=A0[] ? seq_hlist_start_percpu+0x4a0/= 0x4a0 > [ 7891.969477] =C2=A0[] ? save_stack_trace+0x1b/0x20 > [ 7891.975989] =C2=A0[] ? save_stack+0x46/0xd0 > [ 7891.981918] =C2=A0[] ? kasan_slab_free+0x71/0xb0 > [ 7891.988332] =C2=A0[] ? kmem_cache_free+0xe9/0x660 > [ 7891.994842] =C2=A0[] ? putname+0xe0/0x120 > [ 7892.000577] =C2=A0[] ? print_usage_bug+0x700/0x700 > [ 7892.007185] =C2=A0[] proc_reg_read+0x110/0x270 > [ 7892.013404] =C2=A0[] __vfs_read+0x106/0x990 > [ 7892.019332] =C2=A0[] ? do_iter_readv_writev+0x840/0x= 840 > [ 7892.026426] =C2=A0[] ? selinux_file_permission+0x3c5= /0x550 > [ 7892.033802] =C2=A0[] ? security_file_permission+0x17= 6/0x220 > [ 7892.041282] =C2=A0[] ? rw_verify_area+0xd8/0x380 > [ 7892.047697] =C2=A0[] vfs_read+0x118/0x400 > [ 7892.053432] =C2=A0[] SyS_read+0xdf/0x1d0 > [ 7892.059069] =C2=A0[] ? vfs_copy_file_range+0x8f0/0x8= f0 > [ 7892.066066] =C2=A0[] ? __this_cpu_preempt_check+0x13= /0x20 > [ 7892.073352] =C2=A0[] ? vfs_copy_file_range+0x8f0/0x8= f0 > [ 7892.080348] =C2=A0[] do_syscall_64+0x19d/0x540 > [ 7892.086567] =C2=A0[] entry_SYSCALL64_slow_path+0x25/= 0x25 > [ 7892.093756] ---[ end trace 724fbd49872953c4 ]--- --=20 You received this message because you are subscribed to "rtc-linux". Membership options at http://groups.google.com/group/rtc-linux . Please read http://groups.google.com/group/rtc-linux/web/checklist before submitting a driver. ---=20 You received this message because you are subscribed to the Google Groups "= rtc-linux" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to rtc-linux+unsubscribe@googlegroups.com. For more options, visit https://groups.google.com/d/optout.