https://bugzilla.kernel.org/show_bug.cgi?id=40542
Summary: overflow/panic on KVM hipervizor
Product: Virtualization
Version: unspecified
Kernel Version: 3.0.0
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: kvm
AssignedTo: virtualization_...@kernel-bugs.osdl.org
ReportedBy: sla...@rozbicki.eu
Regression: No
Created an attachment (id=67522)
--> (https://bugzilla.kernel.org/attachment.cgi?id=67522)
some debug info like /proc/cpuinfo and .config from kernel
I have 2 machines virtualized with KVM on Gentoo host. There is a gentoo and
win2k8r2 guests (there is apache2 on gentoo which connects with php to mssql
server on the second guest).
During the apache benchmark (ab -c 50 -n 100000 http://address/), hipervisor
TCP stack crashes (not entirely, but random anomalies are noticed for example
iptables -Lnv makes ssh session crashed). Here is kern.log snap:
---
Aug 4 18:54:46 flu kernel: general protection fault: 0000 [#1] SMP
Aug 4 18:54:46 flu kernel: CPU 0
Aug 4 18:54:46 flu kernel: Modules linked in: bridge stp llc kvm_intel kvm
Aug 4 18:54:46 flu kernel:
Aug 4 18:54:46 flu kernel: Pid: 4327, comm: bash Not tainted
3.0.0-xxxx-std-ipv4-64 #7 Supermicro X8STi/X8STi
Aug 4 18:54:46 flu kernel: RIP: 0010:[<ffffffff810f8aaa>]
[<ffffffff810f8aaa>] fget_light+0x6a/0xc0
Aug 4 18:54:46 flu kernel: RSP: 0018:ffff880579015f38 EFLAGS: 00010202
Aug 4 18:54:46 flu kernel: RAX: ffff8806196fa180 RBX: 00007fffdade98f0 RCX:
0000000000000008
Aug 4 18:54:46 flu kernel: RDX: 0000880618ffac80 RSI: ffff880579015f54 RDI:
ffff880618fc77f8
Aug 4 18:54:46 flu kernel: RBP: ffff880579015f38 R08: 0000000000000000 R09:
0000000000000000
Aug 4 18:54:46 flu kernel: R10: 0000000000000008 R11: 0000000000000246 R12:
00000000000000ff
Aug 4 18:54:46 flu kernel: R13: 0000000000005410 R14: 00007fffdade985c R15:
00000000007b6ae0
Aug 4 18:54:46 flu kernel: FS: 00007f495700d700(0000)
GS:ffff88063fc00000(0000) knlGS:0000000000000000
Aug 4 18:54:46 flu kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Aug 4 18:54:46 flu kernel: CR2: 00000000004620d0 CR3: 000000057927b000 CR4:
00000000000026e0
Aug 4 18:54:46 flu kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
Aug 4 18:54:46 flu kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
Aug 4 18:54:46 flu kernel: Process bash (pid: 4327, threadinfo
ffff880579014000, task ffff88061aacc750)
Aug 4 18:54:46 flu kernel: Stack:
Aug 4 18:54:46 flu kernel: ffff880579015f78 ffffffff8110786a 0000000000010000
0000000000000000
Aug 4 18:54:46 flu kernel: 00007fffdade98f0 0000000000000082 00007fffdade9990
0000000000000000
Aug 4 18:54:46 flu kernel: 00000000000010e7 ffffffff818fe2fb 0000000000000246
0000000000000008
Aug 4 18:54:46 flu kernel: Call Trace:
Aug 4 18:54:46 flu kernel: [<ffffffff8110786a>] sys_ioctl+0x2a/0x80
Aug 4 18:54:46 flu kernel: [<ffffffff818fe2fb>] system_call_fastpath+0x16/0x1b
Aug 4 18:54:46 flu kernel: Code: 74 37 31 d2 48 89 d0 c9 c3 0f 1f 84 00 00 00
00 00 48 8b 40 08 3b 38 73 e9 89 ff 48 c1 e7 03 48 03 78 08 48 8b 17 48 85 d2
74 d9 <f6> 42 3d 40 75 d1 48 89 d0 c9 c3 0f 1f 00 48 8b 7a 30 4c 8d 42
Aug 4 18:54:46 flu kernel: RIP [<ffffffff810f8aaa>] fget_light+0x6a/0xc0
Aug 4 18:54:46 flu kernel: RSP <ffff880579015f38>
Aug 4 18:54:46 flu kernel: ---[ end trace 9de898b3d5b9d4c6 ]---
Aug 4 18:54:46 flu kernel: general protection fault: 0000 [#2] SMP
Aug 4 18:54:46 flu kernel: CPU 0
Aug 4 18:54:46 flu kernel: Modules linked in: bridge stp llc kvm_intel kvm
Aug 4 18:54:46 flu kernel:
Aug 4 18:54:46 flu kernel: Pid: 4327, comm: bash Tainted: G D
3.0.0-xxxx-std-ipv4-64 #7 Supermicro X8STi/X8STi
Aug 4 18:54:46 flu kernel: RIP: 0010:[<ffffffff810f5567>]
[<ffffffff810f5567>] filp_close+0x17/0x90
Aug 4 18:54:46 flu kernel: RSP: 0018:ffff880579015cc8 EFLAGS: 00010282
Aug 4 18:54:46 flu kernel: RAX: ffff880618fc77f8 RBX: 0000880618ffac80 RCX:
ffff8806196fa240
Aug 4 18:54:46 flu kernel: RDX: 0000000000000000 RSI: ffff880619648140 RDI:
0000880618ffac80
Aug 4 18:54:46 flu kernel: RBP: ffff880579015ce8 R08: 0000000000000000 R09:
0000000000000000
Aug 4 18:54:46 flu kernel: R10: ffff88061875c090 R11: 0000000000000446 R12:
0000000000000001
Aug 4 18:54:46 flu kernel: R13: ffff8806196fa180 R14: ffff880619648140 R15:
00000000000000ff
Aug 4 18:54:46 flu kernel: FS: 0000000000000000(0000)
GS:ffff88063fc00000(0000) knlGS:0000000000000000
Aug 4 18:54:46 flu kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Aug 4 18:54:46 flu kernel: CR2: 00000000004620d0 CR3: 0000000001b93000 CR4:
00000000000026e0
Aug 4 18:54:46 flu kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
Aug 4 18:54:46 flu kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
Aug 4 18:54:46 flu kernel: Process bash (pid: 4327, threadinfo
ffff880579014000, task ffff88061aacc750)
Aug 4 18:54:46 flu kernel: Stack:
Aug 4 18:54:46 flu kernel: ffff880617983840 0000000000000003 0000000000000001
ffff8806196fa180
Aug 4 18:54:46 flu kernel: ffff880579015d38 ffffffff8104feb0 ffff8806179838a0
0000000000000000
Aug 4 18:54:46 flu kernel: ffff880579015d58 ffff88061aacc750 ffff880619648140
ffff880617983840
Aug 4 18:54:46 flu kernel: Call Trace:
Aug 4 18:54:46 flu kernel: [<ffffffff8104feb0>] put_files_struct+0xd0/0xf0
Aug 4 18:54:46 flu kernel: [<ffffffff8104ff15>] exit_files+0x45/0x50
Aug 4 18:54:46 flu kernel: [<ffffffff81051da8>] do_exit+0x718/0x830
Aug 4 18:54:46 flu kernel: [<ffffffff81005bfc>] oops_end+0x9c/0xe0
Aug 4 18:54:46 flu kernel: [<ffffffff81005d36>] die+0x56/0x90
Aug 4 18:54:46 flu kernel: [<ffffffff81003942>]
do_general_protection+0x152/0x160
Aug 4 18:54:46 flu kernel: [<ffffffff818fdeaf>] general_protection+0x1f/0x30
Aug 4 18:54:46 flu kernel: [<ffffffff810f8aaa>] ? fget_light+0x6a/0xc0
Aug 4 18:54:46 flu kernel: [<ffffffff8105c4d1>] ? sys_rt_sigprocmask+0x71/0xc0
Aug 4 18:54:46 flu kernel: [<ffffffff8110786a>] sys_ioctl+0x2a/0x80
Aug 4 18:54:46 flu kernel: [<ffffffff818fe2fb>] system_call_fastpath+0x16/0x1b
Aug 4 18:54:46 flu kernel: Code: 24 4c 8b 64 24 08 c9 c3 66 66 66 2e 0f 1f 84
00 00 00 00 00 55 48 89 e5 48 83 ec 20 48 89 5d e8 4c 89 65 f0 4c 89 6d f8 48
89 fb
Aug 4 18:54:46 flu kernel: RIP [<ffffffff810f5567>] filp_close+0x17/0x90
Aug 4 18:54:46 flu kernel: RSP <ffff880579015cc8>
Aug 4 18:54:46 flu kernel: ---[ end trace 9de898b3d5b9d4c7 ]---
Aug 4 18:54:46 flu kernel: Fixing recursive fault but reboot is needed!
---
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