Re: kern/55237

[Yorick Hardy <yorickhardy%gmail.com@localhost>]

The following reply was made to PR kern/55237; it has been noted by GNATS.

From: Yorick Hardy <yorickhardy%gmail.com@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/55237
Date: Sat, 14 Nov 2020 21:42:58 +0200

 Another panic, but the KASSERT caught it a bit earlier,
 still triggered by uvm_unmap_detach.
 
 Crash version 9.99.42, image version 9.99.75.
 WARNING: versions differ, you may not be able to examine this image.
 System panicked: kernel diagnostic assertion "(use & VUSECOUNT_MASK) > 1" failed: file "/usr/src/local/sys/kern/vfs_vnode.c", line 729
 Backtrace from time of crash is available.
 crash> bt
 _KERNEL_OPT_NAGR() at 0
 _KERNEL_OPT_NAGR() at 0
 sys_reboot() at sys_reboot
 vpanic() at vpanic+0x160
 __x86_indirect_thunk_rax() at __x86_indirect_thunk_rax
 vtryrele() at vtryrele+0xb2
 vrele() at vrele+0x12
 uvm_unmap_detach() at uvm_unmap_detach+0x7b
 uvmspace_free() at uvmspace_free+0xeb
 exit1() at exit1+0x1b8
 sys_exit() at sys_exit+0x39
 syscall() at syscall+0x23e
 --- syscall (number 1) ---
 799c8398606a:
 crash> 
 
 -- 
 Kind regards,
 
 Yorick Hardy