Kernel panics in page_array_memset() function while taking backup.
Issue
- System panics with following messages :
[ 531.624984] Request for unknown module key 'Veeam Software AG: 9d063645550b483bec752cb3c0249d5ede714b3e' err -11
[ 531.624997] veeamsnap: loading out-of-tree module taints kernel.
[ 531.625001] WARNING: module 'veeamsnap' built without retpoline-enabled compiler, may affect Spectre v2 mitigation <<------
[ 531.625734] veeamsnap: module verification failed: signature and/or required key missing - tainting kernel <<-------
[ 531.625963] veeamsnap: applying kernel_stack fix up
[ 531.627674] veeamsnap:veeamsnap_init Loading
[ 531.627677] veeamsnap:veeamsnap_init Version: 2.0.0.400
[ 531.627679] veeamsnap:veeamsnap_init Author: Veeam Software AG
[ 531.627681] veeamsnap:veeamsnap_init licence: GPL
[ 531.627683] veeamsnap:veeamsnap_init description: Veeam Snapshot Kernel Module
[ 531.627685] veeamsnap:veeamsnap_init zerosnapdata: 1
[ 531.627687] veeamsnap:veeamsnap_init debuglogging: 0
[ 531.627688] veeamsnap:veeamsnap_init snapstore enabled
[ 531.627690] veeamsnap:veeamsnap_init start. container_alloc_counter=0
[ 531.627692] veeamsnap:veeamsnap_init start. container_sl_alloc_counter=0
[ 531.627694] veeamsnap:veeamsnap_init start. mem_cnt=0
[ 531.627695] veeamsnap:veeamsnap_init start. vmem_cnt=0
[ 531.627697] veeamsnap:ctrl_pipe_init .
[ 531.627701] veeamsnap:veeamsnap_init Module major=241
[ 531.628335] veeamsnap:blk_direct_bioset_create Specific bio set created.
[ 531.628391] veeamsnap:blk_redirect_bioset_create Specific bio set created.
[ 531.628449] veeamsnap:blk_deferred_bioset_create Specific bio set created.
[ 531.628457] veeamsnap:snapimage_init .
[ 531.628460] veeamsnap:snapimage_init Snapimage block device was registered. major=252
[ 531.628464] veeamsnap:veeamsnap_init end. container_alloc_counter=0
[ 531.628466] veeamsnap:veeamsnap_init end. container_sl_alloc_counter=0
[ 531.628467] veeamsnap:veeamsnap_init end. mem_cnt=1
[ 531.628469] veeamsnap:veeamsnap_init end. vmem_cnt=0
[ 531.635536] veeamsnap:ctrl_open file=0xffff8d5d4d0cd700
[ 531.635542] veeamsnap:ctrl_pipe_new .
[ 531.635586] veeamsnap:ioctl_compatibility_flags Get compatibility flags <<-------
[ 531.635739] veeamsnap:ioctl_tracking_collect Collecting tracking device:
[ 531.635746] veeamsnap:tracking_collect Have not device under CBT.
[ 531.639239] veeamsnap:tracking_add Adding. dev_id=8:1
[ 531.639251] veeamsnap:tracker_Create dev_id 8:1
[ 531.639253] veeamsnap:tracker_Create SectorStart =0x800
[ 531.639255] veeamsnap:tracker_Create SectorsCapacity=0xfa000
[ 531.639257] veeamsnap:tracker_cbt_start .
[ 531.639259] veeamsnap:cbt_map_create CBT map create.
[ 531.639277] general protection fault: 0000 [#1] SMP
[ 531.639439] Modules linked in: veeamsnap(OE) mptctl mptbase intel_powerclamp coretemp kvm_intel kvm iTCO_wdt
............
[ 531.641458] CPU: 3 PID: 13085 Comm: Lpb Server thre Kdump: loaded Tainted: G IOE ------------ 3.10.0-862.3.2.el7.x86_64 #1
[ 531.641799] Hardware name: HP ProLiant DL360 G7, BIOS P68 08/16/2015
[ 531.641981] task: ffff8d5c80040000 ti: ffff8d5d39c00000 task.ti: ffff8d5d39c00000
[ 531.642193] RIP: 0010:[<ffffffffc069eebd>] [<ffffffffc069eebd>] page_array_memset+0x4d/0xa0 [veeamsnap]
[ 531.642479] RSP: 0018:ffff8d5d39c03d60 EFLAGS: 00010246
............
[ 531.644240] Call Trace:
[ 531.644319] [<ffffffffc06a49ce>] cbt_map_allocate+0x6e/0x160 [veeamsnap]
[ 531.644516] [<ffffffffc06a4c03>] cbt_map_create+0x73/0x100 [veeamsnap]
[ 531.644710] [<ffffffffc06a55ba>] tracker_cbt_start+0x5a/0xc0 [veeamsnap]
[ 531.644907] [<ffffffffc06a5b6a>] tracker_Create+0x16a/0x650 [veeamsnap]
[ 531.645101] [<ffffffffc06b29b0>] tracking_add+0x2e0/0x450 [veeamsnap]
[ 531.645292] [<ffffffffc06b36fc>] ioctl_tracking_add+0x6c/0x170 [veeamsnap]
[ 531.645494] [<ffffffffc06b611e>] ctrl_unlocked_ioctl+0x4e/0x60 [veeamsnap]
[ 531.645696] [<ffffffffb462fed0>] do_vfs_ioctl+0x350/0x560
[ 531.645855] [<ffffffffb46d86ff>] ? file_has_perm+0x9f/0xb0
[ 531.646017] [<ffffffffb461df11>] ? __sb_end_write+0x31/0x60
[ 531.646180] [<ffffffffb4630181>] SyS_ioctl+0xa1/0xc0
[ 531.646328] [<ffffffffb4b2076f>] ? system_call_after_swapgs+0xbc/0x160
[ 531.646517] [<ffffffffb4b2082f>] system_call_fastpath+0x1c/0x21
[ 531.646690] [<ffffffffb4b2077b>] ? system_call_after_swapgs+0xc8/0x160
[ 531.646877] Code: 01 49 89 f9 48 0f af c2 49 8b 79 10 ba 00 10 00 00 40 f6 c7 01 75 47 40 f6 c7 02 75 51 40 f6 c7 04 75 2b 89 d1 c1 e9 03 83 e2 07 <f3> 48 ab 74 0e 41 89 c8 83 c1 01 39 d1 42 88 34 07 72 f2 49 83
[ 531.647982] RIP [<ffffffffc069eebd>] page_array_memset+0x4d/0xa0 [veeamsnap]
[ 531.648197] RSP <ffff8d5d39c03d60>
Environment
- Red Hat Enterprise Linux 7
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