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    pfSense Crash "Fatal trap 12: page fault while in kernel mode"

    Scheduled Pinned Locked Moved General pfSense Questions
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    • stephenw10S
      stephenw10 Netgate Administrator
      last edited by

      Please upload them here: https://nc.netgate.com/nextcloud/s/bCLGN7bCwC7Rszf

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        DrAg0n141 @stephenw10
        last edited by

        @stephenw10 Done :)

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        • stephenw10S
          stephenw10 Netgate Administrator
          last edited by

          Backtrace:

          db:0:kdb.enter.default>  bt
Tracing pid 92224 tid 103104 td 0xfffffe006938b3a0
kdb_enter() at kdb_enter+0x32/frame 0xfffffe008a9e8960
vpanic() at vpanic+0x163/frame 0xfffffe008a9e8a90
panic() at panic+0x43/frame 0xfffffe008a9e8af0
trap_fatal() at trap_fatal+0x40c/frame 0xfffffe008a9e8b50
trap_pfault() at trap_pfault+0x4f/frame 0xfffffe008a9e8bb0
calltrap() at calltrap+0x8/frame 0xfffffe008a9e8bb0
--- trap 0xc, rip = 0xffffffff80f44300, rsp = 0xfffffe008a9e8c80, rbp = 0xfffffe008a9e8d00 ---
in6_pcbbind() at in6_pcbbind+0x440/frame 0xfffffe008a9e8d00
udp6_bind() at udp6_bind+0x13c/frame 0xfffffe008a9e8d60
sobind() at sobind+0x32/frame 0xfffffe008a9e8d80
kern_bindat() at kern_bindat+0x96/frame 0xfffffe008a9e8dc0
sys_bind() at sys_bind+0x9b/frame 0xfffffe008a9e8e00
amd64_syscall() at amd64_syscall+0x109/frame 0xfffffe008a9e8f30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe008a9e8f30
--- syscall (104, FreeBSD ELF64, bind), rip = 0x482bff, rsp = 0x86cd09a50, rbp = 0x86cd09a50 ---

          That does look very similar to a crash we saw recently where the Bind package was trying to bind to linklocal IPv6 addresses and for some reason failing.

          I don't see any IPv6 in your logs. Do you have tailscale set to use any interface/address?

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            DrAg0n141 @stephenw10
            last edited by

            @stephenw10 No i dont have assigned the tailscale interface. And dont have IPv6 enabled on my system.

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            • stephenw10S
              stephenw10 Netgate Administrator
              last edited by

              Hmm, maybe FRR then?

              You shouldn't assign the tailscale interface so that's correct.

              Does it crash often? Comparing that with another report would confirm it.

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                DrAg0n141 @stephenw10
                last edited by

                @stephenw10 I have the FRR Packages installed and using BGP.
                On the other hardware the crash where daily, now on my test vm it crashes 2-3 times a week.

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                • stephenw10S
                  stephenw10 Netgate Administrator
                  last edited by

                  Ok let's see if a second crash is also in tailscaled then.

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                    DrAg0n141
                    last edited by

                    I have now after a longer time my next crash. Its again with tailscale.

                    Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address	= 0xb8
fault code		= supervisor read data, page not present
instruction pointer	= 0x20:0xffffffff80f44300
stack pointer	        = 0x28:0xfffffe008b818c80
frame pointer	        = 0x28:0xfffffe008b818d00
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 39102 (tailscaled)
rdi: ffffffff82d62a40 rsi: 000000000000c8cb rdx: 0000000000000000
rcx: 0000000000000000  r8: fffff8000745fb00  r9: 0000000000000000
rax: 0000000000000030 rbx: fffff80006b44540 rbp: fffffe008b818d00
r10: 0000000000000000 r11: fffffe0069391e20 r12: fffff800198e1360
r13: 000000000000c8cb r14: 0000000000000001 r15: fffff8000745fb00
trap number		= 12
panic: page fault
cpuid = 0
time = 1710249378
KDB: enter: panic
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                    • stephenw10S
                      stephenw10 Netgate Administrator
                      last edited by

                      Do you have the bacltrace? Full crash report? You can upload it to the same NextCloud link above.

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                        DrAg0n141 @stephenw10
                        last edited by

                        @stephenw10 Files are uploaded.

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                        • stephenw10S
                          stephenw10 Netgate Administrator
                          last edited by

                          Backtrace:

                          db:0:kdb.enter.default>  bt
Tracing pid 39102 tid 110696 td 0xfffffe0069391900
kdb_enter() at kdb_enter+0x32/frame 0xfffffe008b818960
vpanic() at vpanic+0x163/frame 0xfffffe008b818a90
panic() at panic+0x43/frame 0xfffffe008b818af0
trap_fatal() at trap_fatal+0x40c/frame 0xfffffe008b818b50
trap_pfault() at trap_pfault+0x4f/frame 0xfffffe008b818bb0
calltrap() at calltrap+0x8/frame 0xfffffe008b818bb0
--- trap 0xc, rip = 0xffffffff80f44300, rsp = 0xfffffe008b818c80, rbp = 0xfffffe008b818d00 ---
in6_pcbbind() at in6_pcbbind+0x440/frame 0xfffffe008b818d00
udp6_bind() at udp6_bind+0x13c/frame 0xfffffe008b818d60
sobind() at sobind+0x32/frame 0xfffffe008b818d80
kern_bindat() at kern_bindat+0x96/frame 0xfffffe008b818dc0
sys_bind() at sys_bind+0x9b/frame 0xfffffe008b818e00
amd64_syscall() at amd64_syscall+0x109/frame 0xfffffe008b818f30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe008b818f30
--- syscall (104, FreeBSD ELF64, bind), rip = 0x482bff, rsp = 0x871d42a50, rbp = 0x871d42a50 ---

                          The message buffer is spammed with ARP movement logs. If that is expected from something you should consider disabling those logs. It may be hiding other useful entries:
                          https://docs.netgate.com/pfsense/en/latest/troubleshooting/logs-arp-moved.html

                          That backtrace looks identical though so that looks like a software bug at this point.

                          What interfaces do you have? That error is something trying to listen on IPv6 and hitting something unexpected.

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                            DrAg0n141 @stephenw10
                            last edited by DrAg0n141

                            I had another Crash before an hour, with tailscale too.

                            That are my interfaces, none of them has ipv6 configured.

                            7952b964-6263-4c62-b005-e2f1c5fd5f8f-12.03.2024-370.png

                            PS: I have uploaded the logs again if you need them, but i think they are identical.

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                            • stephenw10S
                              stephenw10 Netgate Administrator
                              last edited by

                              Yup same crash but at least here it happened soon enough the message buffer still has useful data in it.

                              So I can see that you're running virtualised with vtnet NICs, a bunch of VLANs, and a PPPoE interface.

                              One of those things probably has something unusual about the v6 linklocal address. Can you send me the output of: ifcnbfig -vma to the nc folder?

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                                DrAg0n141 @stephenw10
                                last edited by DrAg0n141

                                @stephenw10
                                Done.

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                                • stephenw10S
                                  stephenw10 Netgate Administrator
                                  last edited by

                                  Ok two things:
                                  Your tailscale interface has a valid IPv6 address which is probably why the error is happening there.

                                  But more likely you somehow have a lagg interface that doesn't have any member interfaces. I'm not sure how you might have that. Did you have a lagg configured previously? Is there any lagg config left over?

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                                    DrAg0n141 @stephenw10
                                    last edited by

                                    @stephenw10

                                    The LAGG is from my pfsense box, i use the vm at the moment to check if i have a hardware problem.

                                    Disable IPV6 on Tailscale is not possible, should i then enable ipv6 on the pfsense again?

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                                    • stephenw10S
                                      stephenw10 Netgate Administrator
                                      last edited by

                                      Nope there should be no problem having IPv6 only on tailscale.

                                      More likely it's trying to listen on all interfaces including lagg0 but lagg0 is invalid. Remove the lagg entirely.

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                                        DrAg0n141 @stephenw10
                                        last edited by

                                        @stephenw10

                                        Ok LAGG Interface is removed, then i am waiting and check i have another crash.

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                                          DrAg0n141 @DrAg0n141
                                          last edited by DrAg0n141

                                          Hi,

                                          i changed back to my primary hardware last week. Now i got my first crash.

                                          
Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 02
fault virtual address	= 0xb8
fault code		= supervisor read data, page not present
instruction pointer	= 0x20:0xffffffff80f44300
stack pointer	        = 0x28:0xffffffff83796c80
frame pointer	        = 0x28:0xffffffff83796d00
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 6121 (tailscaled)
rdi: ffffffff82d62a40 rsi: 0000000000005ce5 rdx: 0000000000000000
rcx: 0000000000000000  r8: fffff8001dd2f700  r9: 0000000000000000
rax: 0000000000000030 rbx: fffff8001da28380 rbp: ffffffff83796d00
r10: 0000000000000000 r11: fffffe006b33a8c0 r12: fffff80123e9bb80
r13: 0000000000005ce5 r14: 0000000000000001 r15: fffff8001dd2f700
trap number		= 12
panic: page fault
cpuid = 0
time = 1711432782
KDB: enter: panic

                                          PS: Have uploaded the dump.

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                                          • stephenw10S
                                            stephenw10 Netgate Administrator
                                            last edited by

                                            Pretty much identical backtrace:

                                            db:0:kdb.enter.default>  bt
Tracing pid 6121 tid 101274 td 0xfffffe006b33a3a0
kdb_enter() at kdb_enter+0x32/frame 0xffffffff83796960
vpanic() at vpanic+0x163/frame 0xffffffff83796a90
panic() at panic+0x43/frame 0xffffffff83796af0
trap_fatal() at trap_fatal+0x40c/frame 0xffffffff83796b50
trap_pfault() at trap_pfault+0x4f/frame 0xffffffff83796bb0
calltrap() at calltrap+0x8/frame 0xffffffff83796bb0
--- trap 0xc, rip = 0xffffffff80f44300, rsp = 0xffffffff83796c80, rbp = 0xffffffff83796d00 ---
in6_pcbbind() at in6_pcbbind+0x440/frame 0xffffffff83796d00
udp6_bind() at udp6_bind+0x13c/frame 0xffffffff83796d60
sobind() at sobind+0x32/frame 0xffffffff83796d80
kern_bindat() at kern_bindat+0x96/frame 0xffffffff83796dc0
sys_bind() at sys_bind+0x9b/frame 0xffffffff83796e00
amd64_syscall() at amd64_syscall+0x109/frame 0xffffffff83796f30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xffffffff83796f30
--- syscall (104, FreeBSD ELF64, bind), rip = 0x482bff, rsp = 0x87058fa50, rbp = 0x87058fa50 ---

                                            Message buffer is still spammed by arp movement logs hiding anything that might be useful. You should really think about just disabling that logging if those MACs are known:
                                            https://docs.netgate.com/pfsense/en/latest/troubleshooting/logs-arp-moved.html

                                            Can you upload the ifconfig output from that hardware?

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