[Bug 276294] net/mpd5: crashes host when configured with PPPoE

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Newsgroups gmane.os.freebsd.devel.net
Message-ID <[email protected]/bugzilla/>
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276294

--- Comment #3 from O. Hartmann <[email protected]> ---
As of today, the appliance has

FreeBSD 14.1-STABLE #2 stable/14-n267607-7e10c2d27a53: Sat May  4 08:33:15 CEST
2024 amd64

The router/FW was up a couple of days/weeks for now. We stopped triggering a
restart of mpd5 via cron every night (to force ISP assigning new IPv4/IPv6 at a
time it is uncritical for the connection, otherwise the iterruption is
performed within business times).

I observe that the longer the router/fw runs, the higher the likelyhood that
the crash appears after the first "service mpd5 restart" performed after boot.

Immediately after boot it takes a couple of attempts to trigger the crash.

------

root@gate:~ # service mpd5 restart
Stopping mpd5.
Waiting for PIDS: 1076.
Starting mpd5.
root@gate:~ #

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x10
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff8097d23a
stack pointer           = 0x28:0xfffffe00842afaa0
frame pointer           = 0x28:0xfffffe00842afbd0
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         = 1581 (isc-net-0005)
                        rdi: fffff80021ebb000 rsi: 000000000000001c rdx:
0000000000000010
                        rcx: 00000000ffffffff  r8: 00000000000000fd  r9:
000000007ac356fd
                        rax: 0000000000000000 rbx: fffff80021ebb000 rbp:
fffffe00842afbd0
                        r10: fffff80007e12698 r11: fffff800027dc4f0 r12:
fffffe00842afaa8
                        r13: fffff80002831480 r14: fffffe00842afb70 r15:
fffffe00842afb70
                        trap number             = 12
                        panic: page fault
                        cpuid = 0
                        time = 1715199106
                        Uptime: 4d13h8m24s
                        Automatic reboot in 15 seconds - press a key on the
console to abort

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