Re: kern/59185: panic over KASSERTMSG(dev->ud_ifaces == NULL) on Dell Latitude 7490

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

The following reply was made to PR kern/59185; it has been noted by GNATS.

From: Emmanuel Nyarko <emmankoko519%gmail.com@localhost>
To: Taylor R Campbell <riastradh%NetBSD.org@localhost>
Cc: Emile `iMil' Heitor <imil%home.imil.net@localhost>,
 Salil Wadnerkar <bsdprg%tuta.io@localhost>,
 "gnats-bugs%netbsd.org@localhost" <gnats-bugs%NetBSD.org@localhost>,
 "netbsd-bugs%netbsd.org@localhost" <netbsd-bugs%NetBSD.org@localhost>
Subject: Re: kern/59185: panic over KASSERTMSG(dev->ud_ifaces == NULL) on Dell
 Latitude 7490
Date: Mon, 6 Oct 2025 10:34:59 +0000

 Hi,
 
 
 > On 4 Oct 2025, at 7:42=E2=80=AFPM, Taylor R Campbell =
 <riastradh%NetBSD.org@localhost> wrote:
 >=20
 >> Date: Sat, 4 Oct 2025 19:06:11 +0000
 >> From: Taylor R Campbell <riastradh%NetBSD.org@localhost>
 >>=20
 >>> Date: Sat, 4 Oct 2025 19:03:59 +0000
 >>> From: Taylor R Campbell <riastradh%NetBSD.org@localhost>
 >>>=20
 >>> Can you please try the attached patch and see if it helps?
 >>>=20
 >>> I suspect this is the same issue as:
 >>>=20
 >>> PR kern/59624: Booting NetBSD-11 from USB on my Dell machine panics
 >>> and hangs
 >>> https://gnats.NetBSD.org/59624
 >>>=20
 >>> PR kern/57447: HEAD fails to probe USB devices and fails to boot up
 >>> https://gnats.NetBSD.org/57447
 >>>=20
 >>> syzbot: UBSan: Undefined Behavior in usb_free_device (2)
 >>> =
 https://syzkaller.appspot.com/bug?id=3De6d4449a128e73a9a88100a5cc833e5cae9=
 fecae
 >>=20
 >> ...patch attached this time
 >=20
 > Corrected patch attached!
 > <pr59185-usbconfignoabuse-v2.diff>
 
 I tested this patch and i am now able to boot from netbsd-11 kernel on =
 my Dell machine.
 
 Thanks!
 
 Emmanuel.