kern/60175: panic: igc_rxrefill: msix=0 id=351

["wiz%NetBSD.org@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60175
>Category:       kern
>Synopsis:       panic: igc_rxrefill: msix=0 id=351
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Apr 05 14:35:00 +0000 2026
>Originator:     Thomas Klausner
>Release:        NetBSD 11.99.5/20260320
>Organization:
	
>Environment:
	
	
Architecture: x86_64
Machine: amd64
>Description:
I had a reboot on 11.99.5/20260320 because of

panic: igc_rxrefill: msix=0 id=351

I don't remember seeing this one before. Network load was light, there
was a bulk build running and a backup to USB disk.

Backtrace:

(gdb) bt
#0  0xffffffff80239eca in cpu_reboot (howto=howto@entry=260, bootstr=bootstr@entry=0x0) at /usr/src/sys/arch/amd64/amd64/machdep.c:709
#1  0xffffffff80e2c09f in kern_reboot (howto=howto@entry=260, bootstr=bootstr@entry=0x0) at /usr/src/sys/kern/kern_reboot.c:91
#2  0xffffffff80e77615 in vpanic (fmt=fmt@entry=0xffffffff815ce52f "%s: msix=%d id=%d\n", ap=ap@entry=0xffff96a469e7ceb8) at /usr/src/sys/kern/subr_prf.c:288
#3  0xffffffff80e776ea in panic (fmt=fmt@entry=0xffffffff815ce52f "%s: msix=%d id=%d\n") at /usr/src/sys/kern/subr_prf.c:209
#4  0xffffffff80331683 in igc_rxrefill (rxr=0xffff8a7d27a3d040, end=356) at /usr/src/sys/dev/pci/igc/if_igc.c:2056
#5  igc_rxeof (rxr=rxr@entry=0xffff8a7d27a3d040, limit=<optimized out>, limit@entry=256) at /usr/src/sys/dev/pci/igc/if_igc.c:2221
#6  0xffffffff80331724 in igc_handle_queue (arg=0xffff8a7d27a5e000) at /usr/src/sys/dev/pci/igc/if_igc.c:2883
#7  0xffffffff80e3af3e in softint_execute (l=0xffff8a8c7725f400, s=4) 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 ()
(gdb)

Core available on request.
>How-To-Repeat:
Use igc0 as main network interface, be unlucky.
>Fix:
Please.

>Unformatted: