Re: igc0 crash

dmesg shows the panic string:

[ 22903.9235251] panic: kernel diagnostic assertion "interlock == NULL || mutex_owned(interlock)" failed: file "/build/netbsd-local/src_ro/sys/kern/kern_timeout.c", line 558[ 22903.9235251] cpu0: Begin traceback...
[ 22903.9235251] vpanic() at netbsd:vpanic+0x189
[ 22903.9235251] kern_assert() at netbsd:kern_assert+0x4b
[ 22903.9235251] callout_halt() at netbsd:callout_halt+0x191
[ 22903.9235251] igc_stop_locked() at netbsd:igc_stop_locked+0x1a8
[ 22903.9235251] igc_stop() at netbsd:igc_stop+0x22
[ 22903.9235251] ether_ioctl_reinit() at netbsd:ether_ioctl_reinit+0x72
[ 22903.9235251] igc_ioctl() at netbsd:igc_ioctl+0xc6
[ 22903.9235251] doifioctl() at netbsd:doifioctl+0xad3
[ 22903.9235251] sys_ioctl() at netbsd:sys_ioctl+0x1fa
[ 22903.9235251] syscall() at netbsd:syscall+0x9d
[ 22903.9235251] --- syscall (number 54) ---
[ 22903.9235251] netbsd:syscall+0x9d:
[ 22903.9235251] cpu0: End traceback...


On Tue, 11 Aug 2026, Paul Goyette wrote:

> This is with a amd64 11.99.7 built from sources updated on 2026-08-09
> at 17:42:29 UTC.
>
> The trigger was simply ``$ ifconfig igc0 down''
>
> Stack trace:
>
> $ crash -M netbsd.67.core
> Crash version 11.99.7, image version 11.99.7.
> crash: _kvm_kvatop(0)
> Kernel compiled without options LOCKDEBUG.
> System panicked: dump forced via kernel debugger
> Backtrace from time of crash is available.
> crash> bt
> sys__ksem_trywait() at 0
> kern_reboot() at kern_reboot+0x5f
> db_sync_cmd() at db_sifting_cmd
> db_command() at db_command+0x152
> db_command_loop() at db_command_loop+0x1ce
> db_trap() at db_trap+0xc9
> kdb_trap() at kdb_trap+0x223
> trap() at trap+0xcc
> --- trap (number 1) ---
> breakpoint() at breakpoint+0x5
> vpanic() at vpanic+0x189
> kern_assert() at __x86_indirect_thunk_rax
> callout_halt() at callout_halt+0x191
> igc_stop_locked() at igc_stop_locked+0x1a8
> igc_stop() at igc_stop+0x22
> ether_ioctl_reinit() at ether_ioctl_reinit+0x72
> igc_ioctl() at igc_ioctl+0xc6
> doifioctl() at doifioctl+0xad3
> sys_ioctl() at sys_ioctl+0x1fa
> syscall() at syscall+0x9d
> --- syscall (number 54) ---
> syscall+0x9d:
>
>
> This was not seen on an earlier kernel from 2026-07-10 at 19:57:03 UTC
>
> Any ideas?
>
>
>
> +---------------------+--------------------------+----------------------+
> | Paul Goyette (.sig) | PGP Key fingerprint:     | E-mail addresses:    |
> | (Retired)           | 1B11 1849 721C 56C8 F63A | [email protected]    |
> | Software Developer  | 6E2E 05FD 15CE 9F2D 5102 | [email protected]  |
> | & Network Engineer  |                          | [email protected] |
> +---------------------+--------------------------+----------------------+
>
> !DSPAM:6a7b12c125851728819793!
>
>

+---------------------+--------------------------+----------------------+
| Paul Goyette (.sig) | PGP Key fingerprint:     | E-mail addresses:    |
| (Retired)           | 1B11 1849 721C 56C8 F63A | [email protected]    |
| Software Developer  | 6E2E 05FD 15CE 9F2D 5102 | [email protected]  |
| & Network Engineer  |                          | [email protected] |
+---------------------+--------------------------+----------------------+