On Sat, May 20, 2017 at 8:30 PM, Sarah Newman srn@prgmr.com wrote:
I experienced a bug that is likely the same as https://bugs.launchpad.net/ ubuntu/+source/linux/+bug/1350373 . Commit b7dd0e350e0bd4c0fddcc9b8958342700b00b168 , which is supposed to fix it, doesn't appear in this kernel and doesn't apply cleanly either. Is there any point in trying to backport the patch?
The backtrace is as follows:
[ 32.304666] ------------[ cut here ]------------ [ 32.304679] kernel BUG at arch/x86/kernel/paravirt.c:252! [ 32.304683] invalid opcode: 0000 [#1] SMP [ 32.304687] Modules linked in: ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter intel_powerclamp coretemp pcspkr ip_tables ext4 mbcache jbd2 xen_netfront xen_blkfront crc32c_intel [ 32.304734] CPU: 0 PID: 3901 Comm: dracut Not tainted 3.10.0-514.16.1.el7.x86_64 #1 [ 32.304739] task: ffff880002598000 ti: ffff88001b728000 task.ti: ffff88001b728000 [ 32.304743] RIP: e030:[<ffffffff8167eb81>] [<ffffffff8167eb81>] enter_lazy.part.0+0x4/0x6 [ 32.304755] RSP: e02b:ffff88001f803aa8 EFLAGS: 00010002 [ 32.304758] RAX: 0000000000000001 RBX: ffff88001eacd640 RCX: 00003ffffffff000 [ 32.304761] RDX: ffff880000000640 RSI: ffffc900000c8000 RDI: 0000000000000001 [ 32.304765] RBP: ffff88001f803aa8 R08: ffff88001f803b78 R09: ffffffff813d50f9 [ 32.304771] R10: ffff88001e801e00 R11: ffffea0000093dc0 R12: ffffc900000c9000 [ 32.304777] R13: ffffc900000c8000 R14: 0000000000000000 R15: ffff88001d150340 [ 32.304787] FS: 00007f64425b0740(0000) GS:ffff88001f800000(0000) knlGS:0000000000000000 [ 32.304796] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b [ 32.304801] CR2: 00000000006de2c8 CR3: 000000001b405000 CR4: 0000000000002660 [ 32.304807] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.304813] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 32.304818] Stack: [ 32.304823] ffff88001f803ab8 ffffffff81061857 ffff88001f803b60 ffffffff811b1fe2 [ 32.304833] ffffc900000c8fff ffffc900000c9000 ffffffff819bac90 ffffc900000c8fff [ 32.304843] ffffc900000c9000 ffff88001eacb000 ffffffff810206b0 0000000000000000 [ 32.304854] Call Trace: [ 32.304858] <IRQ> [ 32.304861] [<ffffffff81061857>] paravirt_enter_lazy_mmu+0x27/0x30 [ 32.304879] [<ffffffff811b1fe2>] apply_to_page_range+0x282/0x460 [ 32.304888] [<ffffffff810206b0>] ? map_pte_fn+0x60/0x60 [ 32.304894] [<ffffffff810207fb>] arch_gnttab_map_status+0x3b/0x70 [ 32.304904] [<ffffffff813d5176>] gnttab_map_frames_v2+0xd6/0x150 [ 32.304910] [<ffffffff813d5291>] gnttab_map+0xa1/0x140 [ 32.304917] [<ffffffff813d5430>] get_free_entries+0x100/0x2e0 [ 32.304923] [<ffffffff813d56d5>] gnttab_alloc_grant_references+ 0x15/0x30 [ 32.304933] [<ffffffffa000bd4f>] do_blkif_request+0x6bf/0x8a0 [xen_blkfront] [ 32.304945] [<ffffffff812eb0e2>] ? __freed_request+0x92/0xa0 [ 32.304951] [<ffffffff812eb6e3>] __blk_run_queue+0x33/0x40 [ 32.304957] [<ffffffff812eb719>] blk_start_queue+0x29/0x40 [ 32.304964] [<ffffffffa000bf51>] kick_pending_request_queues+0x21/0x30 [xen_blkfront] [ 32.304975] [<ffffffffa000c6ce>] blkif_interrupt+0x76e/0x820 [xen_blkfront] [ 32.304986] [<ffffffff811dcc8b>] ? kmem_cache_free+0x1bb/0x1f0 [ 32.304995] [<ffffffff8113079e>] handle_irq_event_percpu+0x3e/0x1e0 [ 32.305003] [<ffffffff8113097d>] handle_irq_event+0x3d/0x60 [ 32.305004] [<ffffffff81133647>] handle_edge_irq+0x77/0x130 [ 32.305004] [<ffffffff813d6217>] __xen_evtchn_do_upcall+0x227/0x350 [ 32.305004] [<ffffffff813d83c3>] xen_evtchn_do_upcall+0x33/0x50 [ 32.305004] [<ffffffff81698c7e>] xen_do_hypervisor_callback+0x1e/0x30 [ 32.305004] <EOI> [ 32.305004] [<ffffffff811af916>] ? copy_pte_range+0x2b6/0x5a0 [ 32.305004] [<ffffffff811af8e6>] ? copy_pte_range+0x286/0x5a0 [ 32.305004] [<ffffffff811b24d2>] ? copy_page_range+0x312/0x490 [ 32.305004] [<ffffffff81083012>] ? dup_mm+0x362/0x680 [ 32.305004] [<ffffffff810847ae>] ? copy_process+0x144e/0x1960 [ 32.305004] [<ffffffff81084e71>] ? do_fork+0x91/0x2c0 [ 32.305004] [<ffffffff81085126>] ? SyS_clone+0x16/0x20 [ 32.305004] [<ffffffff816974d9>] ? stub_clone+0x69/0x90 [ 32.305004] [<ffffffff81697189>] ? system_call_fastpath+0x16/0x1b [ 32.305004] Code: 20 e9 2f ff ff ff 44 89 fa 44 89 ee 48 c7 c7 10 45 8c 81 31 c0 e8 9d 14 00 00 58 5a 5b 41 5c 41 5d 41 5e 41 5f 5d c3 55 48 89 e5 <0f> 0b 66 66 66 66 90 55 48 89 e5 0f 0b 55 48 89 e5 0f 0b 55 48 [ 32.305004] RIP [<ffffffff8167eb81>] enter_lazy.part.0+0x4/0x6 [ 32.305004] RSP <ffff88001f803aa8> [ 32.305004] ---[ end trace 49f67f0d85e1ac69 ]--- [ 32.305004] Kernel panic - not syncing: Fatal exception in interrupt
I had the same kernel panic while booting a PV domU on 3.10.0-693.2.2.el7.centos.plus.x86_64. I had to start the domU again to boot correctly. Can this patch be added to the CentOS 7 kernel-plus?
[ 13.372417] ------------[ cut here ]------------ [ 13.372434] kernel BUG at arch/x86/kernel/paravirt.c:252! [ 13.372441] invalid opcode: 0000 [#1] SMP [ 13.372450] Modules linked in: xt_owner nf_nat_ftp xt_REDIRECT nf_nat_redirect xt_conntrack iptable_mangle nf_conntrack_ftp xt_LOG xt_limit xt_multiport iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ipt_REJECT nf_reject_ipv4 iptable_filter vfat fat isofs xfs libcrc32c loop sb_edac edac_core coretemp intel_rapl iosf_mbi crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd pcspkr ip_tables ext4 mbcache jbd2 xen_blkfront xen_netfront crct10dif_pclmul crct10dif_common crc32c_intel [ 13.372545] CPU: 0 PID: 1138 Comm: mysqld Not tainted 3.10.0-693.2.2.el7.centos.plus.x86_64 #1 [ 13.372555] task: ffff8800fb1a8fd0 ti: ffff8801e9e20000 task.ti: ffff8801e9e20000 [ 13.372561] RIP: e030:[<ffffffff816ad7fe>] [<ffffffff816ad7fe>] enter_lazy.part.0+0x4/0x6 [ 13.372579] RSP: e02b:ffff8801fea03a80 EFLAGS: 00010002 [ 13.372584] RAX: 0000000000000001 RBX: ffff88017d05b280 RCX: ffffffff810215a0 [ 13.372593] RDX: ffff880000000280 RSI: 00003ffffffff000 RDI: 0000000000000001 [ 13.372599] RBP: ffff8801fea03a80 R08: ffff8801fea03b50 R09: ffffffff813f6559 [ 13.372605] R10: ffff88017fc01d00 R11: ffffea00000c0380 R12: ffffc90000c52000 [ 13.372616] R13: ffffc90000c50000 R14: 0000000000000000 R15: ffff8801e3770e00 [ 13.372632] FS: 00007febcc67a900(0000) GS:ffff8801fea00000(0000) knlGS:ffff8801fea00000 [ 13.372644] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 13.372654] CR2: 000056038881bd60 CR3: 00000000f996d000 CR4: 0000000000042660 [ 13.372663] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 13.372672] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 13.372680] Stack: [ 13.372685] ffff8801fea03a90 ffffffff81063b05 ffff8801fea03b38 ffffffff811b2a80 [ 13.372701] ffffc90000c51fff ffffc90000c52000 ffffffff81a0ac90 ffffc90000c51fff [ 13.372718] ffffc90000c52000 ffff88017fc50000 ffffffff810215a0 00000000fead6d00 [ 13.372733] Call Trace: [ 13.372740] <IRQ> [ 13.372744] [<ffffffff81063b05>] paravirt_enter_lazy_mmu+0x25/0x30 [ 13.372771] [<ffffffff811b2a80>] apply_to_page_range+0x260/0x430 [ 13.372784] [<ffffffff810215a0>] ? map_pte_fn+0x60/0x60 [ 13.372794] [<ffffffff810216eb>] arch_gnttab_map_status+0x3b/0x70 [ 13.372809] [<ffffffff813f65d6>] gnttab_map_frames_v2+0xd6/0x150 [ 13.372820] [<ffffffff813f66f1>] gnttab_map+0xa1/0x140 [ 13.372831] [<ffffffff813f6890>] get_free_entries+0x100/0x2e0
Karl