Re: CURRENT (r316844): Fatal trap 12: page fault while in kernel mode (syslogd)

[O. Hartmann]

Am Fri, 14 Apr 2017 20:18:57 +0300
Konstantin Belousov  schrieb:

> On Fri, Apr 14, 2017 at 06:58:27PM +0200, O. Hartmann wrote:
> > Fatal trap 12: page fault while in kernel mode
> > cpuid = 2; apic id = 02
> > fault virtual address   = 0xf8001282fb00
> > fault code  = supervisor read instruction, protection violation 
> >  
> 
> > ??() at 0xf8001282fb00
> > bpf_mtap() at bpf_mtap+0x1ab/frame 0xfe012d2aefb0
> > iflib_txq_drain() at iflib_txq_drain+0x1383/frame 0xfe012d2af130
> > drain_ring_lockless() at drain_ring_lockless+0xc0/frame 0xfe012d2af190
> > ifmp_ring_enqueue() at ifmp_ring_enqueue+0x32e/frame 0xfe012d2af200
> > iflib_if_transmit() at iflib_if_transmit+0xb0/frame 0xfe012d2af240
> > ether_output() at ether_output+0x730/frame 0xfe012d2af2e0
> > arprequest() at arprequest+0x426/frame 0xfe012d2af3e0
> > arpresolve_full() at arpresolve_full+0x3d1/frame 0xfe012d2af460
> > arpresolve() at arpresolve+0x10c/frame 0xfe012d2af4d0
> > ether_output() at ether_output+0x4e1/frame 0xfe012d2af570
> > ip_output() at ip_output+0x14e6/frame 0xfe012d2af6b0
> > udp_send() at udp_send+0xab1/frame 0xfe012d2af780
> > sosend_dgram() at sosend_dgram+0x3e4/frame 0xfe012d2af7f0
> > kern_sendit() at kern_sendit+0x229/frame 0xfe012d2af890
> > sendit() at sendit+0x1a7/frame 0xfe012d2af8e0
> > sys_sendto() at sys_sendto+0x4d/frame 0xfe012d2af930
> > amd64_syscall() at amd64_syscall+0x4c2/frame 0xfe012d2afab0
> > Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfe012d2afab0
> > syscall (133, FreeBSD ELF64, sys_sendto), rip = 0x800b8a5fa, rsp = 
> > 0x7fffd6b8,
> > rbp = 0x7fffdcc0 ---  
> 
> You probably have BPF_JITTER option in your kernel config.  Either set
> net.bpf_jitter.enable to 0 for now, or remove the option.
> 
> It is due to r316767. The issue is known and a solution is being discussed.

simply setting "net.bpf_jitter.enable=0" in /boot/loader.conf.local doesn't 
help, the
Trap 12 still occurs.

-- 
O. Hartmann

Ich widerspreche der Nutzung oder Übermittlung meiner Daten für
Werbezwecke oder für die Markt- oder Meinungsforschung (§ 28 Abs. 4 BDSG).


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Re: CURRENT (r316844): Fatal trap 12: page fault while in kernel mode (syslogd)

[O. Hartmann]

Am Sat, 15 Apr 2017 12:33:34 +0300
Konstantin Belousov  schrieb:

> On Sat, Apr 15, 2017 at 11:18:41AM +0200, O. Hartmann wrote:
> > Am Fri, 14 Apr 2017 20:18:57 +0300
> > Konstantin Belousov  schrieb:
> >   
> > > On Fri, Apr 14, 2017 at 06:58:27PM +0200, O. Hartmann wrote:  
> > > > Fatal trap 12: page fault while in kernel mode
> > > > cpuid = 2; apic id = 02
> > > > fault virtual address   = 0xf8001282fb00
> > > > fault code  = supervisor read instruction, protection 
> > > > violation
> > >   
> > > > ??() at 0xf8001282fb00
> > > > bpf_mtap() at bpf_mtap+0x1ab/frame 0xfe012d2aefb0
> > > > iflib_txq_drain() at iflib_txq_drain+0x1383/frame 0xfe012d2af130
> > > > drain_ring_lockless() at drain_ring_lockless+0xc0/frame 
> > > > 0xfe012d2af190
> > > > ifmp_ring_enqueue() at ifmp_ring_enqueue+0x32e/frame 0xfe012d2af200
> > > > iflib_if_transmit() at iflib_if_transmit+0xb0/frame 0xfe012d2af240
> > > > ether_output() at ether_output+0x730/frame 0xfe012d2af2e0
> > > > arprequest() at arprequest+0x426/frame 0xfe012d2af3e0
> > > > arpresolve_full() at arpresolve_full+0x3d1/frame 0xfe012d2af460
> > > > arpresolve() at arpresolve+0x10c/frame 0xfe012d2af4d0
> > > > ether_output() at ether_output+0x4e1/frame 0xfe012d2af570
> > > > ip_output() at ip_output+0x14e6/frame 0xfe012d2af6b0
> > > > udp_send() at udp_send+0xab1/frame 0xfe012d2af780
> > > > sosend_dgram() at sosend_dgram+0x3e4/frame 0xfe012d2af7f0
> > > > kern_sendit() at kern_sendit+0x229/frame 0xfe012d2af890
> > > > sendit() at sendit+0x1a7/frame 0xfe012d2af8e0
> > > > sys_sendto() at sys_sendto+0x4d/frame 0xfe012d2af930
> > > > amd64_syscall() at amd64_syscall+0x4c2/frame 0xfe012d2afab0
> > > > Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfe012d2afab0
> > > > syscall (133, FreeBSD ELF64, sys_sendto), rip = 0x800b8a5fa, rsp = 
> > > > 0x7fffd6b8,
> > > > rbp = 0x7fffdcc0 ---
> > > 
> > > You probably have BPF_JITTER option in your kernel config.  Either set
> > > net.bpf_jitter.enable to 0 for now, or remove the option.
> > > 
> > > It is due to r316767. The issue is known and a solution is being 
> > > discussed.  
> > 
> > simply setting "net.bpf_jitter.enable=0" in /boot/loader.conf.local doesn't 
> > help, the
> > Trap 12 still occurs.  
> 
> It is sysctl, not tunable.

Correct, I didn't/couldn't think that far. Having a setting in /etc/sysctl.conf
accordingly, booting the kernel doesn't reveal the Trap 12 anymore.

Thanks.
Oliver


-- 
O. Hartmann

Ich widerspreche der Nutzung oder Übermittlung meiner Daten für
Werbezwecke oder für die Markt- oder Meinungsforschung (§ 28 Abs. 4 BDSG).


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Re: CURRENT (r316844): Fatal trap 12: page fault while in kernel mode (syslogd)

[Konstantin Belousov]

On Sat, Apr 15, 2017 at 11:18:41AM +0200, O. Hartmann wrote:
> Am Fri, 14 Apr 2017 20:18:57 +0300
> Konstantin Belousov  schrieb:
> 
> > On Fri, Apr 14, 2017 at 06:58:27PM +0200, O. Hartmann wrote:
> > > Fatal trap 12: page fault while in kernel mode
> > > cpuid = 2; apic id = 02
> > > fault virtual address   = 0xf8001282fb00
> > > fault code  = supervisor read instruction, protection 
> > > violation  
> > 
> > > ??() at 0xf8001282fb00
> > > bpf_mtap() at bpf_mtap+0x1ab/frame 0xfe012d2aefb0
> > > iflib_txq_drain() at iflib_txq_drain+0x1383/frame 0xfe012d2af130
> > > drain_ring_lockless() at drain_ring_lockless+0xc0/frame 0xfe012d2af190
> > > ifmp_ring_enqueue() at ifmp_ring_enqueue+0x32e/frame 0xfe012d2af200
> > > iflib_if_transmit() at iflib_if_transmit+0xb0/frame 0xfe012d2af240
> > > ether_output() at ether_output+0x730/frame 0xfe012d2af2e0
> > > arprequest() at arprequest+0x426/frame 0xfe012d2af3e0
> > > arpresolve_full() at arpresolve_full+0x3d1/frame 0xfe012d2af460
> > > arpresolve() at arpresolve+0x10c/frame 0xfe012d2af4d0
> > > ether_output() at ether_output+0x4e1/frame 0xfe012d2af570
> > > ip_output() at ip_output+0x14e6/frame 0xfe012d2af6b0
> > > udp_send() at udp_send+0xab1/frame 0xfe012d2af780
> > > sosend_dgram() at sosend_dgram+0x3e4/frame 0xfe012d2af7f0
> > > kern_sendit() at kern_sendit+0x229/frame 0xfe012d2af890
> > > sendit() at sendit+0x1a7/frame 0xfe012d2af8e0
> > > sys_sendto() at sys_sendto+0x4d/frame 0xfe012d2af930
> > > amd64_syscall() at amd64_syscall+0x4c2/frame 0xfe012d2afab0
> > > Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfe012d2afab0
> > > syscall (133, FreeBSD ELF64, sys_sendto), rip = 0x800b8a5fa, rsp = 
> > > 0x7fffd6b8,
> > > rbp = 0x7fffdcc0 ---  
> > 
> > You probably have BPF_JITTER option in your kernel config.  Either set
> > net.bpf_jitter.enable to 0 for now, or remove the option.
> > 
> > It is due to r316767. The issue is known and a solution is being discussed.
> 
> simply setting "net.bpf_jitter.enable=0" in /boot/loader.conf.local doesn't 
> help, the
> Trap 12 still occurs.

It is sysctl, not tunable.
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Re: CURRENT (r316844): Fatal trap 12: page fault while in kernel mode (syslogd)

[O. Hartmann]

Am Fri, 14 Apr 2017 20:18:57 +0300
Konstantin Belousov  schrieb:

> On Fri, Apr 14, 2017 at 06:58:27PM +0200, O. Hartmann wrote:
> > Fatal trap 12: page fault while in kernel mode
> > cpuid = 2; apic id = 02
> > fault virtual address   = 0xf8001282fb00
> > fault code  = supervisor read instruction, protection violation 
> >  
> 
> > ??() at 0xf8001282fb00
> > bpf_mtap() at bpf_mtap+0x1ab/frame 0xfe012d2aefb0
> > iflib_txq_drain() at iflib_txq_drain+0x1383/frame 0xfe012d2af130
> > drain_ring_lockless() at drain_ring_lockless+0xc0/frame 0xfe012d2af190
> > ifmp_ring_enqueue() at ifmp_ring_enqueue+0x32e/frame 0xfe012d2af200
> > iflib_if_transmit() at iflib_if_transmit+0xb0/frame 0xfe012d2af240
> > ether_output() at ether_output+0x730/frame 0xfe012d2af2e0
> > arprequest() at arprequest+0x426/frame 0xfe012d2af3e0
> > arpresolve_full() at arpresolve_full+0x3d1/frame 0xfe012d2af460
> > arpresolve() at arpresolve+0x10c/frame 0xfe012d2af4d0
> > ether_output() at ether_output+0x4e1/frame 0xfe012d2af570
> > ip_output() at ip_output+0x14e6/frame 0xfe012d2af6b0
> > udp_send() at udp_send+0xab1/frame 0xfe012d2af780
> > sosend_dgram() at sosend_dgram+0x3e4/frame 0xfe012d2af7f0
> > kern_sendit() at kern_sendit+0x229/frame 0xfe012d2af890
> > sendit() at sendit+0x1a7/frame 0xfe012d2af8e0
> > sys_sendto() at sys_sendto+0x4d/frame 0xfe012d2af930
> > amd64_syscall() at amd64_syscall+0x4c2/frame 0xfe012d2afab0
> > Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfe012d2afab0
> > syscall (133, FreeBSD ELF64, sys_sendto), rip = 0x800b8a5fa, rsp = 
> > 0x7fffd6b8,
> > rbp = 0x7fffdcc0 ---  
> 
> You probably have BPF_JITTER option in your kernel config.  Either set
> net.bpf_jitter.enable to 0 for now, or remove the option.
> 
> It is due to r316767. The issue is known and a solution is being discussed.


Thank you very much.

Indeed, I have.

Regards,

Oliver

-- 
O. Hartmann

Ich widerspreche der Nutzung oder Übermittlung meiner Daten für
Werbezwecke oder für die Markt- oder Meinungsforschung (§ 28 Abs. 4 BDSG).


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Re: CURRENT (r316844): Fatal trap 12: page fault while in kernel mode (syslogd)

[Konstantin Belousov]

On Fri, Apr 14, 2017 at 06:58:27PM +0200, O. Hartmann wrote:
> Fatal trap 12: page fault while in kernel mode
> cpuid = 2; apic id = 02
> fault virtual address   = 0xf8001282fb00
> fault code  = supervisor read instruction, protection violation

> ??() at 0xf8001282fb00
> bpf_mtap() at bpf_mtap+0x1ab/frame 0xfe012d2aefb0
> iflib_txq_drain() at iflib_txq_drain+0x1383/frame 0xfe012d2af130
> drain_ring_lockless() at drain_ring_lockless+0xc0/frame 0xfe012d2af190
> ifmp_ring_enqueue() at ifmp_ring_enqueue+0x32e/frame 0xfe012d2af200
> iflib_if_transmit() at iflib_if_transmit+0xb0/frame 0xfe012d2af240
> ether_output() at ether_output+0x730/frame 0xfe012d2af2e0
> arprequest() at arprequest+0x426/frame 0xfe012d2af3e0
> arpresolve_full() at arpresolve_full+0x3d1/frame 0xfe012d2af460
> arpresolve() at arpresolve+0x10c/frame 0xfe012d2af4d0
> ether_output() at ether_output+0x4e1/frame 0xfe012d2af570
> ip_output() at ip_output+0x14e6/frame 0xfe012d2af6b0
> udp_send() at udp_send+0xab1/frame 0xfe012d2af780
> sosend_dgram() at sosend_dgram+0x3e4/frame 0xfe012d2af7f0
> kern_sendit() at kern_sendit+0x229/frame 0xfe012d2af890
> sendit() at sendit+0x1a7/frame 0xfe012d2af8e0
> sys_sendto() at sys_sendto+0x4d/frame 0xfe012d2af930
> amd64_syscall() at amd64_syscall+0x4c2/frame 0xfe012d2afab0
> Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfe012d2afab0
> syscall (133, FreeBSD ELF64, sys_sendto), rip = 0x800b8a5fa, rsp = 
> 0x7fffd6b8,
> rbp = 0x7fffdcc0 ---

You probably have BPF_JITTER option in your kernel config.  Either set
net.bpf_jitter.enable to 0 for now, or remove the option.

It is due to r316767. The issue is known and a solution is being discussed.
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Re: CURRENT (r316844): Fatal trap 12: page fault while in kernel mode (syslogd)

[O. Hartmann]

Am Fri, 14 Apr 2017 10:02:03 -0600
Alan Somers  schrieb:

> On Fri, Apr 14, 2017 at 9:53 AM, O. Hartmann  wrote:
> > I just updated today CURRENT's tree sources for nanoBSD to r316844 and 
> > recompiled an
> > image I use for an PCengines APU 2C4. The APU now crashes with the error 
> > shown below.
> >
> > r316717 is all right and boots and works as expected.
> >
> > Just now, I depend on the box, so debugging kernel with more info is 
> > underway, but in
> > due time.
> >
> > Kind regards,
> >
> > Oliver
> >
> > [...]
> > uhub2:  on 
> > usbus1
> > uhub2: 4 ports with 4 removable, self powered
> > Link state changed to up
> > igb0: link state changed to UP
> > Link state changed to up
> > igb1: link state changed to UP
> > igb1.100: link state changed to UP
> > igb1.2: link state changed to UP
> > igb1.66: link state changed to UP
> > igb1.111: link state changed to UP
> > igb1.10: link state changed to UP
> > tun0: link state changed to UP
> > link state changed to down
> > igb0: link state changed to DOWN
> > Bump sched buckets to 64 (was 0)
> > Link state changed to up
> >
> >
> > Fatal trap 12: page fault while in kernel mode
> > cpuid = 0; apic id = 00
> > fault virtual address   = 0xf80012231600
> > fault code  = supervisor read instruction, protection violation
> > instruction pointer = 0x20:0xf80012231600
> > stack pointer   = 0x28:0xfe012cdc1f58
> > frame pointer   = 0x28:0xfe012cdc1fc0
> > code segment= base 0x0, limit 0xf, type 0x1b
> > = DPL 0, pres 1, long 1, def32 0, gran 1
> > processor eflags= interrupt enabled, resume, IOPL = 0
> > current process = 941 (syslogd)
> > trap number = 12
> > panic: page fault
> > cpuid = 1
> > time = 1492182471
> > Uptime: 16s
> > PCEngines apu2
> > coreboot build 20160311  
> 
> At a minimum, you need to include a backtrace with a bug report like this.
> 
> -Alan

Just sent a PR:
Bug 218663

and added the backtrace as required:

[...]
Link state changed to up
Kernel page fault with the following non-sleepable locks held:
shared rw bpf interface lock (bpf interface lock) r = 0 (0xf80002ff4028) 
locked
@ /pool/sources/CURRENT/src/sys/net/bpf.c:2206 shared rw udpinp (udpinp) r = 0
(0xf800127f5c98) locked @ 
/pool/sources/CURRENT/src/sys/netinet/udp_usrreq.c:1140
stack backtrace: #0 0x80641960 at witness_debugger+0x70
#1 0x80642d8e at witness_warn+0x45e
#2 0x8096f563 at trap_pfault+0x53
#3 0x8096ed5e at trap+0x24e
#4 0x80952ce3 at calltrap+0x8
#5 0x806fc253 at iflib_txq_drain+0x1383
#6 0x806feda0 at drain_ring_lockless+0xc0
#7 0x806feb6e at ifmp_ring_enqueue+0x32e
#8 0x806fda90 at iflib_if_transmit+0xb0
#9 0x806dfb00 at ether_output+0x730
#10 0x80761ae6 at arprequest+0x426
#11 0x80761f41 at arpresolve_full+0x3d1
#12 0x807621ac at arpresolve+0x10c
#13 0x806df8b1 at ether_output+0x4e1
#14 0x80785c36 at ip_output+0x14e6
#15 0x8080ddd1 at udp_send+0xab1
#16 0x80676c44 at sosend_dgram+0x3e4
#17 0x8067d3a9 at kern_sendit+0x229


Fatal trap 12: page fault while in kernel mode
cpuid = 2; apic id = 02
fault virtual address   = 0xf8001282fb00
fault code  = supervisor read instruction, protection violation
instruction pointer = 0x20:0xf8001282fb00
stack pointer   = 0x28:0xfe012d2aef48
frame pointer   = 0x28:0xfe012d2aefb0
code segment= base rx0, limit 0xf, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags= interrupt enabled, resume, IOPL = 0
current process = 941 (syslogd)
[ thread pid 941 tid 100084 ]
Stopped at  0xf8001282fb00
db> bt
Tracing pid 941 tid 100084 td 0xf8000452
??() at 0xf8001282fb00
bpf_mtap() at bpf_mtap+0x1ab/frame 0xfe012d2aefb0
iflib_txq_drain() at iflib_txq_drain+0x1383/frame 0xfe012d2af130
drain_ring_lockless() at drain_ring_lockless+0xc0/frame 0xfe012d2af190
ifmp_ring_enqueue() at ifmp_ring_enqueue+0x32e/frame 0xfe012d2af200
iflib_if_transmit() at iflib_if_transmit+0xb0/frame 0xfe012d2af240
ether_output() at ether_output+0x730/frame 0xfe012d2af2e0
arprequest() at arprequest+0x426/frame 0xfe012d2af3e0
arpresolve_full() at arpresolve_full+0x3d1/frame 0xfe012d2af460
arpresolve() at arpresolve+0x10c/frame 0xfe012d2af4d0
ether_output() at ether_output+0x4e1/frame 0xfe012d2af570
ip_output() at ip_output+0x14e6/frame 0xfe012d2af6b0
udp_send() at udp_send+0xab1/frame 0xfe012d2af780
sosend_dgram() at sosend_dgram+0x3e4/frame 0xfe012d2af7f0
kern_sendit() at kern_sendit+0x229/frame 0xfe012d2af890
sendit() at sendit+0x1a7/frame 0xfe012d2af8e0
sys_sendto() at sys_sendto+0x4d/frame 0xfe012d2af930
amd64_syscall() at amd64_syscall+0x4c2/frame 

Re: CURRENT (r316844): Fatal trap 12: page fault while in kernel mode (syslogd)

[Alan Somers]

On Fri, Apr 14, 2017 at 9:53 AM, O. Hartmann  wrote:
> I just updated today CURRENT's tree sources for nanoBSD to r316844 and 
> recompiled an
> image I use for an PCengines APU 2C4. The APU now crashes with the error 
> shown below.
>
> r316717 is all right and boots and works as expected.
>
> Just now, I depend on the box, so debugging kernel with more info is 
> underway, but in due
> time.
>
> Kind regards,
>
> Oliver
>
> [...]
> uhub2:  on 
> usbus1
> uhub2: 4 ports with 4 removable, self powered
> Link state changed to up
> igb0: link state changed to UP
> Link state changed to up
> igb1: link state changed to UP
> igb1.100: link state changed to UP
> igb1.2: link state changed to UP
> igb1.66: link state changed to UP
> igb1.111: link state changed to UP
> igb1.10: link state changed to UP
> tun0: link state changed to UP
> link state changed to down
> igb0: link state changed to DOWN
> Bump sched buckets to 64 (was 0)
> Link state changed to up
>
>
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; apic id = 00
> fault virtual address   = 0xf80012231600
> fault code  = supervisor read instruction, protection violation
> instruction pointer = 0x20:0xf80012231600
> stack pointer   = 0x28:0xfe012cdc1f58
> frame pointer   = 0x28:0xfe012cdc1fc0
> code segment= base 0x0, limit 0xf, type 0x1b
> = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags= interrupt enabled, resume, IOPL = 0
> current process = 941 (syslogd)
> trap number = 12
> panic: page fault
> cpuid = 1
> time = 1492182471
> Uptime: 16s
> PCEngines apu2
> coreboot build 20160311

At a minimum, you need to include a backtrace with a bug report like this.

-Alan
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