kern/56931: Panic in vfs_insmntque(): panic: TAILQ_* forw 0xffffec0928771d00 /usr/src/sys/kern/vfs_mount.c:487

[leot%NetBSD.org@localhost]

>Number:         56931
>Category:       kern
>Synopsis:       Panic in vfs_insmntque(): panic: TAILQ_* forw 0xffffec0928771d00 /usr/src/sys/kern/vfs_mount.c:487
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jul 17 15:50:01 +0000 2022
>Originator:     Leonardo Taccari
>Release:        NetBSD 9.99.98
>Organization:
The NetBSD Foundation
>Environment:
	
	
System: NetBSD abacus 9.99.98 NetBSD 9.99.98 (GENERIC) #0: Sat Jul 16 19:46:32 CEST 2022 leot@abacus:/usr/obj/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:
	From NetBSD 9.99.98 of Jul 16 while building pkgsrc packages (it was
	probably at the `make package' or `make install' phase of www/firefox91)
	the system panic-ed as follows:

	panic: TAILQ_* forw 0xffffec0928771d00 /usr/src/sys/kern/vfs_mount.c:487
	cpu0: Begin traceback...
	vpanic() at netbsd:vpanic+0x18c
	panic() at netbsd:panic+0x3c
	vfs_insmntque() at netbsd:vfs_insmntque+0x2be
	vcache_reclaim() at netbsd:vcache_reclaim+0x280
	vrelel() at netbsd:vrelel+0x2e2
	tmpfs_remove() at netbsd:tmpfs_remove+0x1bb
	VOP_REMOVE() at netbsd:VOP_REMOVE+0x5b
	do_sys_unlinkat() at netbsd:do_sys_unlinkat+0x2a1
	syscall() at netbsd:syscall+0x19e

	If possible further information are needed I have also a coredump
	available.
>How-To-Repeat:
	Unfortunately, it is not clear to me yet to how to reproduce it
	reliably. The machine built several pkgsrc packages overnight without
	any problems. pkgsrc WRKOBJDIR is set to a tmpfs.
>Fix:
	No idea, sorry!

>Unformatted: