Context: An aarch64 PkgBase kernel and world boot under Parallels
on macOS (M4 MAX):

FreeBSD 15.0-CURRENT main-n276258-c5773d366ecc GENERIC arm64 aarch64 1500035

. . .
vtnet0: link state changed to UP
Invoking IPv6 network device address event may sleep with the following 
non-sleepable locks held:
exclusive sleep mutex vtnet0-rx0 (vtnet0-rx0) r = 0 (0xffffa000c0b3e480) locked 
@ /home/pkgbuild/worktrees/main/sys/dev/virtio/network/if_vtnet.c:2202
stack backtrace:
#0 0xffff000000530f0c at witness_debugger+0x60
#1 0xffff000000532140 at witness_warn+0x408
#2 0xffff00000069ede8 at in6_update_ifa+0xa68
#3 0xffff0000006cbcb0 at in6_ifadd+0x1dc
#4 0xffff0000006c80f8 at nd6_ra_input+0xe38
#5 0xffff000000699200 at icmp6_input+0x900
#6 0xffff0000006b2c54 at ip6_input+0xf64
#7 0xffff000000613a04 at netisr_dispatch_src+0xd8
#8 0xffff0000005f58d4 at ether_demux+0x174
#9 0xffff0000005f6f80 at ether_nh_input+0x374
#10 0xffff000000613a04 at netisr_dispatch_src+0xd8
#11 0xffff0000005f5d24 at ether_input+0xdc
#12 0xffff000000328ea4 at vtnet_rxq_eof+0x6f4
#13 0xffff0000003286ec at vtnet_rx_vq_process+0xb0
#14 0xffff00000031f824 at vtpci_intx_intr+0xe8
#15 0xffff00000046e0e4 at ithread_loop+0x29c
#16 0xffff00000046a2b0 at fork_exit+0x78
#17 0xffff0000008897f8 at fork_trampoline+0x18
lock order reversal: (sleepable after non-sleepable)
 1st 0xffffa000c0b3e480 vtnet0-rx0 (vtnet0-rx0, sleep mutex) @ 
/home/pkgbuild/worktrees/main/sys/dev/virtio/network/if_vtnet.c:2202
 2nd 0xffff000001129640 in6_multi_sx (in6_multi_sx, sx) @ 
/home/pkgbuild/worktrees/main/sys/netinet6/in6_mcast.c:1217
lock order vtnet0-rx0 -> in6_multi_sx attempted at:
#0 0xffff000000530aac at witness_checkorder+0xad0
#1 0xffff0000004c405c at _sx_xlock+0x70
#2 0xffff0000006a7a68 at in6_joingroup+0x48
#3 0xffff00000069f01c at in6_update_ifa+0xc9c
#4 0xffff0000006cbcb0 at in6_ifadd+0x1dc
#5 0xffff0000006c80f8 at nd6_ra_input+0xe38
#6 0xffff000000699200 at icmp6_input+0x900
#7 0xffff0000006b2c54 at ip6_input+0xf64
#8 0xffff000000613a04 at netisr_dispatch_src+0xd8
#9 0xffff0000005f58d4 at ether_demux+0x174
#10 0xffff0000005f6f80 at ether_nh_input+0x374
#11 0xffff000000613a04 at netisr_dispatch_src+0xd8
#12 0xffff0000005f5d24 at ether_input+0xdc
#13 0xffff000000328ea4 at vtnet_rxq_eof+0x6f4
#14 0xffff0000003286ec at vtnet_rx_vq_process+0xb0
#15 0xffff00000031f824 at vtpci_intx_intr+0xe8
#16 0xffff00000046e0e4 at ithread_loop+0x29c
#17 0xffff00000046a2b0 at fork_exit+0x78
Starting Network: lo0 vtnet0.
. . .


===
Mark Millard
marklmi at yahoo.com


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