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IDProjectCategoryView StatusLast Update
0017145CentOS-7crashpublic2020-03-13 03:11
Reporterlicheng 
PriorityimmediateSeveritycrashReproducibilityrandom
Status newResolutionopen 
PlatformOSCentOS Linux release 7.7.1908 OS Version
Product Version7.7-1908 
Target VersionFixed in Version 
Summary0017145: BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffff993fe808>] unlink_anon_vm
DescriptionRandom server restart,i can only track to lib brtree cause this null pointer,i dont know much about kernel,what i want is a which f() cause this bug and how to fix it.

[root@localhost ~]# uname -a
Linux localhost.localdomain 3.10.0-1062.el7.x86_64 #1 SMP Wed Aug 7 18:08:02 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.7.1908 (Core)

--file /var/crash/127.0.0.1-2020-03-05-09\:31\:59/vmcore-dmesg.txt
[60012.070513] Oops: 0000 [#1] SMP
[60012.070525] Modules linked in: tcp_lp fuse bonding ixgbe mdio igb dca e1000e ptp pps_core xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack libcrc32c ipt_REJECT nf_reject_ipv4 tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables devlink iptable_filter swcsm36(OE) sunrpc dm_mirror dm_region_hash dm_log dm_mod iTCO_wdt iTCO_vendor_support mei_wdt intel_powerclamp coretemp intel_rapl kvm_intel snd_hda_codec_realtek kvm snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel irqbypass crc32_pclmul snd_hda_codec snd_hda_core snd_hwdep snd_seq snd_seq_device joydev snd_pcm ghash_clmulni_intel sg cryptd pcspkr i2c_i801 lpc_ich snd_timer snd_soc_sst_acpi snd_soc_acpi snd_soc_acpi_intel_match
[60012.070775] snd soundcore i2c_designware_platform i2c_designware_core acpi_pad pcc_cpufreq mei_me mei ip_tables ext4 mbcache jbd2 raid1 sd_mod crc_t10dif crct10dif_generic uas usb_storage i915 drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ahci drm crct10dif_pclmul crct10dif_common libahci crc32c_intel firewire_ohci libata serio_raw firewire_core crc_itu_t i2c_algo_bit drm_panel_orientation_quirks sdhci_acpi sdhci video mmc_core iosf_mbi [last unloaded: pps_core]
[60012.070923] CPU: 1 PID: 3047 Comm: gdbus Kdump: loaded Tainted: G OE ------------ 3.10.0-1062.el7.x86_64 #1
[60012.070950] Hardware name: Supermicro X10SAE/X10SAE, BIOS 3.0b 06/23/2017
[60012.070968] task: ffff8c7d0e14e2a0 ti: ffff8c7d0c260000 task.ti: ffff8c7d0c260000
[60012.070987] RIP: 0010:[<ffffffff993fe808>] [<ffffffff993fe808>] unlink_anon_vmas+0x78/0x1b0
[60012.071010] RSP: 0018:ffff8c7d0c263b80 EFLAGS: 00010283
[60012.071024] RAX: 00007f1ef9ad3000 RBX: fffffffffffffff0 RCX: 0000000000000000
[60012.071042] RDX: 00007f1ef98d3000 RSI: ffff8c7e54713058 RDI: ffff8c7d0fb25e58
[60012.071061] RBP: ffff8c7d0c263bc0 R08: 00007f1ef98d3000 R09: ffff8c7d0c110208
[60012.071079] R10: ffff8c7d0fb25d00 R11: 0000000000000000 R12: ffff8c7d0ecf2700
[60012.071097] R13: ffff8c7d0fb25ed0 R14: 0000000000000000 R15: 0000000000000000
[60012.071115] FS: 0000000000000000(0000) GS:ffff8c7e5fb00000(0000) knlGS:0000000000000000
[60012.071136] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[60012.071151] CR2: 0000000000000000 CR3: 00000001e8a3c000 CR4: 00000000000607e0
[60012.071169] Call Trace:
[60012.071180] [<ffffffff993ec5b8>] free_pgtables+0xa8/0x120
[60012.071197] [<ffffffff993f90f6>] exit_mmap+0xc6/0x1a0
[60012.071213] [<ffffffff9935c225>] ? __delayacct_add_tsk+0x175/0x1a0
[60012.071232] [<ffffffff992971f7>] mmput+0x67/0xf0
[60012.071246] [<ffffffff992a0ed8>] do_exit+0x288/0xa50
[60012.071260] [<ffffffff992a171f>] do_group_exit+0x3f/0xa0
[60012.071277] [<ffffffff992b252e>] get_signal_to_deliver+0x1ce/0x5e0
[60012.071295] [<ffffffff9922c527>] do_signal+0x57/0x6f0
[60012.071311] [<ffffffff99448738>] ? vfs_write+0x168/0x1f0
[60012.071327] [<ffffffff9998be21>] ? system_call_after_swapgs+0xae/0x146
[60012.071345] [<ffffffff9922cc32>] do_notify_resume+0x72/0xc0
[60012.071362] [<ffffffff9998c23b>] int_signal+0x12/0x17
[60012.071375] Code: 5f fc 00 4c 89 e6 e8 48 3f 02 00 48 8b 43 10 48 8d 4b 10 48 89 4d c8 48 83 e8 10 4c 39 e9 74 53 49 89 dc 48 89 c3 4d 8b 7c 24 08 <49> 8b 17 49 39 d6 74 1d 4d 85 f6 0f 85 e1 00 00 00 48 8d 7a 08
[60012.071491] RIP [<ffffffff993fe808>] unlink_anon_vmas+0x78/0x1b0
[60012.071508] RSP <ffff8c7d0c263b80>
[60012.071518] CR2: 0000000000000000

Steps To Reproducejust random crash
Additional Informationmy email licheng@sansec.com.cn
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Issue History

Date Modified Username Field Change
2020-03-13 03:10 licheng New Issue