Re: kern/53982: unpluging a tty/serial can panic

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, Feb 14, 2019 at 07:40:00PM +0000, manuel.bouyer%lip6.fr@localhost wrote:
> ucom3: detached
> umodem2: detached
> umodem2: at uhub6 port 3 (addr 8) disconnected
> fatal page fault in supervisor mode
> trap type 6 code 0 rip 0xffffffff80460681 cs 0x8 rflags 0x10202 cr2 0x200000004 
> ilevel 0x5 rsp 0xffff8000ae306fb0
> curlwp 0xfffffe821f5fa440 pid 0.6 lowest kstack 0xffff8000ae3042c0
> panic: trap
> cpu0: Begin traceback...
> vpanic() at netbsd:vpanic+0x15d
> snprintf() at netbsd:snprintf
> trap() at netbsd:trap+0xa00
> --- trap (number 6) ---
> usb_transfer_complete() at netbsd:usb_transfer_complete+0x86
> ehci_softintr() at netbsd:ehci_softintr+0x159
> usb_soft_intr() at netbsd:usb_soft_intr+0x38
> softint_dispatch() at netbsd:softint_dispatch+0x91
> DDB lost frame for netbsd:Xsoftintr+0x4f, trying 0xffff8000ae3070f0
> Xsoftintr() at netbsd:Xsoftintr+0x4f
> --- interrupt ---
> 0:
> cpu0: End traceback...

Here's a variant:
fatal integer divide fault in supervisor mode
trap type 8 code 0 rip 0xffffffff8063b2cc cs 0x8 rflags 0x10246 cr2 0x77df15b085
d4 ilevel 0x5 rsp 0xffff8000ae306eb0
curlwp 0xfffffe821f5fa440 pid 0.6 lowest kstack 0xffff8000ae3042c0
panic: trap
cpu0: Begin traceback...
vpanic() at netbsd:vpanic+0x15d
snprintf() at netbsd:snprintf
trap() at netbsd:trap+0xa00
--- trap (number 8) ---
ehci_reset_sqtd_chain.isra.1() at netbsd:ehci_reset_sqtd_chain.isra.1+0x210
ehci_device_intr_start() at netbsd:ehci_device_intr_start+0x84
usbd_start_next() at netbsd:usbd_start_next+0x90
ehci_softintr() at netbsd:ehci_softintr+0x159
usb_soft_intr() at netbsd:usb_soft_intr+0x38
softint_dispatch() at netbsd:softint_dispatch+0x91
DDB lost frame for netbsd:Xsoftintr+0x4f, trying 0xffff8000ae3070f0
Xsoftintr() at netbsd:Xsoftintr+0x4f
--- interrupt ---
0:
cpu0: End traceback...

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--