Marek Šikl, thank you for taking the time to report this bug and helping to
make Ubuntu better. Please execute the following command only once, as it will
automatically gather debugging information, in a terminal:
apport-collect 1547011
** Package changed: linux-lts-vivid (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Importance: Undecided => Low
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1547011
Title:
kernel error
Status in linux package in Ubuntu:
Incomplete
Bug description:
Server freezes in week period approximately with this syslog message:
Feb 18 11:26:32 server kernel: [849924.991842] ------------[ cut here
]------------
Feb 18 11:26:32 server kernel: [849924.991867] WARNING: CPU: 19 PID: 32274 at
/build/linux-lts-vivid-LIqOuh/linux-lts-vivid-3.19.0/include/linux/kref.h:47
kref_get.part.0+0x1e/0x27()
Feb 18 11:26:32 server kernel: [849924.991870] Modules linked in: btrfs xor
raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c ipmi_devintf
xt_recent xt_multiport quota_v2 quota_tree ipt_REJ
ECT nf_reject_ipv4 xt_comment nf_log_ipv4 nf_log_common xt_LOG xt_tcpudp
xt_limit xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack
ip6table_filter ast ip6_tables ttm iptable_filter drm_kms_helper ip
mi_ssif intel_rapl ip_tables iosf_mbi drm x_tables syscopyarea sysfillrect
x86_pkg_temp_thermal intel_powerclamp kvm_intel sysimgblt kvm joydev
crct10dif_pclmul crc32_pclmul lpc_ich cryptd sb_edac mei_me eda
c_core mei ipmi_si ipmi_msghandler 8250_fintek nf_conntrack_ftp nf_conntrack
wmi shpchp ioatdma coretemp acpi_pad acpi_power_meter mac_hid lp parport igb
hid_generic i2c_algo_bit dca usbhid megaraid_sas ahci
ptp hid libahci pps_core
Feb 18 11:26:32 server kernel: [849924.991960] CPU: 19 PID: 32274 Comm: pop3
Not tainted 3.19.0-49-generic #55~14.04.1-Ubuntu
Feb 18 11:26:32 server kernel: [849924.991963] Hardware name: Supermicro
X10DRW/X10DRW-i, BIOS 1.0b 10/29/2014
Feb 18 11:26:32 server kernel: [849924.991965] ffffffff81a91160
ffff8805ca80b878 ffffffff817b01b5 0000000000000000
Feb 18 11:26:32 server kernel: [849924.991970] 0000000000000000
ffff8805ca80b8b8 ffffffff81074dea ffff88086afa3840
Feb 18 11:26:32 server kernel: [849924.991973] ffff88046b217100
ffff88046b217100 ffff88046b218030 ffff88086af2f430
Feb 18 11:26:32 server kernel: [849924.991978] Call Trace:
Feb 18 11:26:32 server kernel: [849924.991987] [<ffffffff817b01b5>]
dump_stack+0x45/0x57
Feb 18 11:26:32 server kernel: [849924.991994] [<ffffffff81074dea>]
warn_slowpath_common+0x8a/0xc0
Feb 18 11:26:32 server kernel: [849924.991998] [<ffffffff81074eda>]
warn_slowpath_null+0x1a/0x20
Feb 18 11:26:32 server kernel: [849924.992002] [<ffffffff817afee1>]
kref_get.part.0+0x1e/0x27
Feb 18 11:26:32 server kernel: [849924.992014] [<ffffffff8134df15>]
aa_label_merge+0x445/0x7c0
Feb 18 11:26:32 server kernel: [849924.992020] [<ffffffff8134ac42>]
update_file_cxt+0x32/0x80
Feb 18 11:26:32 server kernel: [849924.992024] [<ffffffff8134b86a>]
aa_file_perm+0x11a/0x440
Feb 18 11:26:32 server kernel: [849924.992033] [<ffffffff81202f7c>] ?
prepend_path+0xcc/0x2a0
Feb 18 11:26:32 server kernel: [849924.992038] [<ffffffff81348b8a>]
common_file_perm+0x4a/0x100
Feb 18 11:26:32 server kernel: [849924.992043] [<ffffffff81348c91>]
apparmor_file_receive+0x51/0x60
Feb 18 11:26:32 server kernel: [849924.992050] [<ffffffff81308a66>]
security_file_receive+0x16/0x20
Feb 18 11:26:32 server kernel: [849924.992059] [<ffffffff816a0768>]
scm_detach_fds+0x148/0x260
Feb 18 11:26:32 server kernel: [849924.992070] [<ffffffff8174b0d1>]
unix_stream_recvmsg+0x681/0x950
Feb 18 11:26:32 server kernel: [849924.992075] [<ffffffff81352b41>] ?
aa_sock_msg_perm+0x81/0x150
Feb 18 11:26:32 server kernel: [849924.992081] [<ffffffff8168f862>]
sock_recvmsg+0xa2/0xd0
Feb 18 11:26:32 server kernel: [849924.992086] [<ffffffff8168f4fe>] ?
copy_msghdr_from_user+0x15e/0x1f0
Feb 18 11:26:32 server kernel: [849924.992090] [<ffffffff8168f683>]
___sys_recvmsg+0xf3/0x230
Feb 18 11:26:32 server kernel: [849924.992096] [<ffffffff81230947>] ?
ep_send_events_proc+0xa7/0x1c0
Feb 18 11:26:32 server kernel: [849924.992100] [<ffffffff812308a0>] ?
ep_read_events_proc+0xc0/0xc0
Feb 18 11:26:32 server kernel: [849924.992104] [<ffffffff81231249>] ?
ep_scan_ready_list.isra.8+0x199/0x1c0
Feb 18 11:26:32 server kernel: [849924.992108] [<ffffffff812313a0>] ?
ep_poll+0x110/0x350
Feb 18 11:26:32 server kernel: [849924.992112] [<ffffffff81690aa2>]
__sys_recvmsg+0x42/0x80
Feb 18 11:26:32 server kernel: [849924.992116] [<ffffffff81690af2>]
SyS_recvmsg+0x12/0x20
Feb 18 11:26:32 server kernel: [849924.992127] [<ffffffff817b7c0d>]
system_call_fastpath+0x16/0x1b
Feb 18 11:26:32 server kernel: [849924.992130] ---[ end trace
59885196d131ae8e ]---
Feb 18 11:26:32 server kernel: [849925.019773] BUG: unable to handle kernel
NULL pointer dereference at 0000000000000098
Feb 18 11:26:32 server kernel: [849925.019849] IP: [<ffffffff8134db17>]
aa_label_merge+0x47/0x7c0
Feb 18 11:26:32 server kernel: [849925.019917] PGD 0
Feb 18 11:26:32 server kernel: [849925.019938] Oops: 0000 [#1] SMP
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-extra-3.19.0-49-generic 3.19.0-49.55~14.04.1
ProcVersionSignature: Ubuntu 3.19.0-49.55~14.04.1-generic 3.19.8-ckt12
Uname: Linux 3.19.0-49-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
Date: Thu Feb 18 13:42:09 2016
InstallationDate: Installed on 2015-08-12 (190 days ago)
InstallationMedia: Ubuntu-Server 14.04.3 LTS "Trusty Tahr" - Beta amd64
(20150805)
SourcePackage: linux-lts-vivid
UpgradeStatus: No upgrade log present (probably fresh install)
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