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Date: Wed, 18 Mar 2020 01:39:18 +0100
From: "bryn1u85 ." <m.bryn1u@...il.com>
To: lkrg-users@...ts.openwall.com, Adam Zabrocki <pi3@....com.pl>
Subject: lkrg is freezing whole server during boot. Kernel-5.5.9
Hey guys,
I have a strange problem with lkrg. The LKRG has been compiled well based
on newest source from gitlab. After all i just run lkrg and working well
too but after reboot my server was freezed. I undertook investment and
found something. LKRG says that freezes server for 20 seconds and so on.
Mar 18 00:56:46 localhost.localdomain kernel: Freezing user space processes
...
*Mar 18 00:56:46 localhost.localdomain kernel: Freezing of tasks failed
after 20.002 seconds (1 tasks refusing to freeze, wq_busy=0):*
Mar 18 00:56:46 localhost.localdomain kernel: nft D 0 922
1 0x00004004
Mar 18 00:56:46 localhost.localdomain kernel: Call Trace:
Mar 18 00:56:46 localhost.localdomain kernel: ? __schedule+0x2e4/0x780
Mar 18 00:56:46 localhost.localdomain kernel: ?
insn_get_modrm.part.0+0x5c/0xe0
Mar 18 00:56:46 localhost.localdomain kernel: schedule+0x50/0xc0
Mar 18 00:56:46 localhost.localdomain kernel: schedule_timeout+0x20a/0x300
Mar 18 00:56:46 localhost.localdomain kernel: ? cpumask_next+0x1b/0x20
Mar 18 00:56:46 localhost.localdomain kernel:
wait_for_completion+0x119/0x160
Mar 18 00:56:46 localhost.localdomain kernel: ? wake_up_q+0xa0/0xa0
Mar 18 00:56:46 localhost.localdomain kernel: __wait_rcu_gp+0x139/0x140
Mar 18 00:56:46 localhost.localdomain kernel: synchronize_rcu+0x68/0x70
Mar 18 00:56:46 localhost.localdomain kernel: ? __call_rcu+0x4e0/0x4e0
Mar 18 00:56:46 localhost.localdomain kernel: ?
__bpf_trace_rcu_utilization+0x20/0x20
Mar 18 00:56:46 localhost.localdomain kernel:
__nf_tables_abort+0x1f2/0x8f0 [nf_tables]
Mar 18 00:56:46 localhost.localdomain kernel: nf_tables_abort+0x1a/0x40
[nf_tables]
Mar 18 00:56:46 localhost.localdomain kernel:
nfnetlink_rcv_batch+0x4a1/0x700 [nfnetlink]
Mar 18 00:56:46 localhost.localdomain kernel: ?
__nla_validate_parse+0x53/0x8a0
Mar 18 00:56:46 localhost.localdomain kernel: ? security_capable+0x42/0x60
Mar 18 00:56:46 localhost.localdomain kernel: nfnetlink_rcv+0x117/0x163
[nfnetlink]
Mar 18 00:56:46 localhost.localdomain kernel: netlink_unicast+0x194/0x230
Mar 18 00:56:46 localhost.localdomain kernel: netlink_sendmsg+0x232/0x470
Mar 18 00:56:46 localhost.localdomain kernel: sock_sendmsg+0x61/0x70
Mar 18 00:56:46 localhost.localdomain kernel: ____sys_sendmsg+0x207/0x250
Mar 18 00:56:46 localhost.localdomain kernel: ___sys_sendmsg+0x8c/0xd0
Mar 18 00:56:46 localhost.localdomain kernel: __sys_sendmsg+0x5c/0xa0
Mar 18 00:56:46 localhost.localdomain kernel: do_syscall_64+0x74/0x433
Mar 18 00:56:46 localhost.localdomain kernel:
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Mar 18 00:56:46 localhost.localdomain kernel: RIP: 0033:0x7fd5804ccbb7
Mar 18 00:57:06 localhost.localdomain kernel: Code: Bad RIP value.
Mar 18 00:57:06 localhost.localdomain kernel: RSP: 002b:00007ffd1a4ff278
EFLAGS: 00000246 ORIG_RAX: 000000000000002e
Mar 18 00:57:06 localhost.localdomain kernel: RAX: ffffffffffffffda RBX:
0000000000000001 RCX: 00007fd5804ccbb7
Mar 18 00:57:06 localhost.localdomain kernel: RDX: 0000000000000000 RSI:
00007ffd1a500300 RDI: 0000000000000003
Mar 18 00:57:06 localhost.localdomain kernel: RBP: 00007ffd1a500400 R08:
0000000000000000 R09: 00007ffd1a4ff280
Mar 18 00:57:06 localhost.localdomain kernel: R10: 00007fd580694398 R11:
0000000000000246 R12: 0000000000000003
Mar 18 00:57:06 localhost.localdomain kernel: R13: 0000000000000016 R14:
00007ffd1a4ff290 R15: 00007ffd1a500460
Mar 18 00:57:06 localhost.localdomain kernel: OOM killer enabled.
Mar 18 00:57:06 localhost.localdomain kernel: Restarting tasks ... done.
Mar 18 00:57:06 localhost.localdomain kernel: Freezing user space processes
...
*Mar 18 00:57:06 localhost.localdomain kernel: Freezing of tasks failed
after 20.008 seconds (1 tasks refusing to freeze, wq_busy=0):*
Mar 18 00:57:06 localhost.localdomain kernel: nft D 0 922
1 0x00004004
Mar 18 00:57:06 localhost.localdomain kernel: Call Trace:
Mar 18 00:57:06 localhost.localdomain kernel: ? __schedule+0x2e4/0x780
Mar 18 00:57:06 localhost.localdomain kernel: ?
insn_get_modrm.part.0+0x5c/0xe0
Mar 18 00:57:06 localhost.localdomain kernel: schedule+0x50/0xc0
Mar 18 00:57:06 localhost.localdomain kernel: schedule_timeout+0x20a/0x300
Mar 18 00:57:06 localhost.localdomain kernel: ? cpumask_next+0x1b/0x20
Mar 18 00:57:06 localhost.localdomain kernel:
wait_for_completion+0x119/0x160
Mar 18 00:57:06 localhost.localdomain kernel: ? wake_up_q+0xa0/0xa0
Mar 18 00:57:06 localhost.localdomain kernel: __wait_rcu_gp+0x139/0x140
Mar 18 00:57:06 localhost.localdomain kernel: synchronize_rcu+0x68/0x70
Mar 18 00:57:06 localhost.localdomain kernel: ? __call_rcu+0x4e0/0x4e0
Mar 18 00:57:06 localhost.localdomain kernel: ?
__bpf_trace_rcu_utilization+0x20/0x20
Mar 18 00:57:06 localhost.localdomain kernel:
__nf_tables_abort+0x1f2/0x8f0 [nf_tables]
Mar 18 00:57:06 localhost.localdomain kernel: ?
nf_tables_newtable+0x3fd/0x580 [nf_tables]
Mar 18 00:57:06 localhost.localdomain kernel: nf_tables_abort+0x1a/0x40
[nf_tables]
Mar 18 00:57:06 localhost.localdomain kernel:
nfnetlink_rcv_batch+0x4a1/0x700 [nfnetlink]
Mar 18 00:57:06 localhost.localdomain kernel: ?
__nla_validate_parse+0x53/0x8a0
Mar 18 00:57:06 localhost.localdomain kernel: ? security_capable+0x42/0x60
Mar 18 00:57:06 localhost.localdomain kernel: nfnetlink_rcv+0x117/0x163
[nfnetlink]
Mar 18 00:57:06 localhost.localdomain kernel: netlink_unicast+0x194/0x230
Mar 18 00:57:06 localhost.localdomain kernel: netlink_sendmsg+0x232/0x470
Mar 18 00:57:06 localhost.localdomain kernel: sock_sendmsg+0x61/0x70
Mar 18 00:57:06 localhost.localdomain kernel: ____sys_sendmsg+0x207/0x250
Mar 18 00:57:06 localhost.localdomain kernel: ___sys_sendmsg+0x8c/0xd0
Mar 18 00:57:06 localhost.localdomain kernel: __sys_sendmsg+0x5c/0xa0
Mar 18 00:57:06 localhost.localdomain kernel: do_syscall_64+0x74/0x433
Mar 18 00:57:06 localhost.localdomain kernel:
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Mar 18 00:57:06 localhost.localdomain kernel: RIP: 0033:0x7fd5804ccbb7
Mar 18 00:57:06 localhost.localdomain kernel: Code: Bad RIP value.
Mar 18 00:57:06 localhost.localdomain kernel: RSP: 002b:00007ffd1a4ff278
EFLAGS: 00000246 ORIG_RAX: 000000000000002e
Mar 18 00:57:06 localhost.localdomain kernel: RAX: ffffffffffffffda RBX:
0000000000000001 RCX: 00007fd5804ccbb7
Mar 18 00:57:06 localhost.localdomain kernel: RDX: 0000000000000000 RSI:
00007ffd1a500300 RDI: 0000000000000003
Mar 18 00:57:06 localhost.localdomain kernel: RBP: 00007ffd1a500400 R08:
0000000000000000 R09: 00007ffd1a4ff280
Mar 18 00:57:06 localhost.localdomain kernel: R10: 00007fd580694398 R11:
0000000000000246 R12: 0000000000000003
Mar 18 00:57:06 localhost.localdomain kernel: R13: 0000000000000016 R14:
00007ffd1a4ff290 R15: 00007ffd1a500460
Mar 18 00:57:06 localhost.localdomain kernel: OOM killer enabled.
Mar 18 00:57:06 localhost.localdomain kernel: Restarting tasks ... done.
Mar 18 00:57:06 localhost.localdomain kernel: Freezing user space processes
...
This freeze is looping again and again as i said for 20 seconds. The server
can't finish booting process. Someone can help ?? When i disable lkrg
everything back to normal.
Best regards,
Michał,
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