igc(4) panic: igc_rxrefill

Hi!

A couple days ago I had a panic (during a bulk build, but I often run
those). I haven't had this panic before. The kernel was x86_64 11.99.2
from 20250914.

After the reboot, the log entry was:

savecore: reboot after panic: [ 642010.7505030] panic: igc_rxrefill: msix=0 id=573

The backtrace is:

(gdb) bt
#0  0xffffffff80239b85 in cpu_reboot (howto=howto@entry=260, bootstr=bootstr@entry=0x0) at /usr/src/sys/arch/amd64/amd64/machdep.c:709
#1  0xffffffff80de6bf5 in kern_reboot (howto=howto@entry=260, bootstr=bootstr@entry=0x0) at /usr/src/sys/kern/kern_reboot.c:91
#2  0xffffffff80e2cc23 in vpanic (fmt=fmt@entry=0xffffffff813c46c3 "%s: msix=%d id=%d\n", ap=ap@entry=0xffff992469e8ceb8) at /usr/src/sys/kern/subr_prf.c:288
#3  0xffffffff80e2ccf8 in panic (fmt=fmt@entry=0xffffffff813c46c3 "%s: msix=%d id=%d\n") at /usr/src/sys/kern/subr_prf.c:209
#4  0xffffffff8032c8e5 in igc_rxrefill (end=576, rxr=0xffff808e6ba2c040) at /usr/src/sys/dev/pci/igc/if_igc.c:2054
#5  igc_rxeof (rxr=rxr@entry=0xffff808e6ba2c040, limit=<optimized out>, limit@entry=256) at /usr/src/sys/dev/pci/igc/if_igc.c:2219
#6  0xffffffff8032c986 in igc_handle_queue (arg=0xffff808e6ba0d000) at /usr/src/sys/dev/pci/igc/if_igc.c:2881
#7  0xffffffff80df50fe in softint_execute (s=4, l=0xffff809dbb25f400) at /usr/src/sys/kern/kern_softint.c:599
#8  softint_dispatch (pinned=<optimized out>, s=4) at /usr/src/sys/kern/kern_softint.c:848
#9  0xffffffff8023480c in Xsoftintr ()

Has anyone seen this one before, or has ideas what the problem could
be?

Kernel core dump available on request.

Thanks,
 Thomas