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Date:      Thu, 18 Apr 2024 02:27:58 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 278422] kernel panic related to IPv4 routes populated by bird2 when dxr routing algorithm used
Message-ID:  <bug-278422-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D278422

            Bug ID: 278422
           Summary: kernel panic related to IPv4 routes populated by bird2
                    when dxr routing algorithm used
           Product: Base System
           Version: 14.0-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: gshapiro@FreeBSD.org

While researching bug 278394, Marek recommended:

net.route.algo.inet.algo=3Ddxr

Using that caused a kernel panic:

Fatal trap 9: general protection fault while in kernel mode
cpuid =3D 0; apic id =3D 00
instruction pointer     =3D 0x20:0xffffffff80cb316b
stack pointer           =3D 0x0:0xfffffe000374fd00
frame pointer           =3D 0x0:0xfffffe000374fd10
code segment            =3D base 0x0, limit 0xfffff, type 0x1b
                        =3D DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        =3D interrupt enabled, resume, IOPL =3D 0
current process         =3D 2 (clock (0))
rdi: deadc0dedeadc0de rsi: fffffe000374fd28 rdx: 000000000009f272
rcx: 000000000009f271  r8: 0000000000000f1c  r9: 000000000009f271
rax: deadc0dedeadc0de rbx: fffffe000374fd28 rbp: fffffe000374fd10
r10: 0000000000004f93 r11: 0000000000800000 r12: fffffe00a133b000
r13: 0000000000000003 r14: deadc0dedeadc0de r15: 0000000000000f1c
trap number             =3D 9
panic: general protection fault
cpuid =3D 0
time =3D 1713406520
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe000374f=
a40
vpanic() at vpanic+0x132/frame 0xfffffe000374fb70
panic() at panic+0x43/frame 0xfffffe000374fbd0
trap_fatal() at trap_fatal+0x40c/frame 0xfffffe000374fc30
calltrap() at calltrap+0x8/frame 0xfffffe000374fc30
--- trap 0x9, rip =3D 0xffffffff80cb316b, rsp =3D 0xfffffe000374fd00, rbp =
=3D
0xfffffe000374fd10 ---
fib_get_rtable_info() at fib_get_rtable_info+0x1b/frame 0xfffffe000374fd10
dxr_change_rib_batch() at dxr_change_rib_batch+0x272/frame 0xfffffe000374fd=
70
apply_rtable_changes() at apply_rtable_changes+0x2a/frame 0xfffffe000374fda0
handle_fd_callout() at handle_fd_callout+0x167/frame 0xfffffe000374fe00
softclock_call_cc() at softclock_call_cc+0x14e/frame 0xfffffe000374fec0
softclock_thread() at softclock_thread+0xc6/frame 0xfffffe000374fef0
fork_exit() at fork_exit+0x82/frame 0xfffffe000374ff30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe000374ff30
--- trap 0, rip =3D 0, rsp =3D 0, rbp =3D 0 ---

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