Re: kern/52937: NetBSD 8.0_BETA panics in pmap_remove_pte

[Alexander Nasonov <alnsn%yandex.ru@localhost>]

The following reply was made to PR kern/52937; it has been noted by GNATS.

From: Alexander Nasonov <alnsn%yandex.ru@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
	netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/52937: NetBSD 8.0_BETA panics in pmap_remove_pte
Date: Thu, 25 Jan 2018 00:24:40 +0000

 Alexander Nasonov wrote:
 > This time it crashed differently:
 > 
 > panic: pmap_remove_pte: PG_PVLIST with pv-untracked page va = 0x7f7eba200000 pa = 0xffe8dea6c0000 (0xffe8dea6c0)
 
 It crashed again:
 
 panic: kernel diagnostic assertion "(pte & PG_G) == 0 || pm == pmap_kernel()" failed: file "/path/to/src/sys/arch/x86/x86/pmap_tlb.c", line 229
 WARNING: SPL NOT LOWERED ON TRAP EXIT 7 0
 cpu7: Begin traceback...
 
 vpanic() at netbsd:vpanic+0x140
 ch_voltag_convert_in() at netbsd:ch_voltag_convert_in
 pmap_tlb_shootdown() at netbsd:pmap_tlb_shootdown+0x51
 pmap_remove_pte() at netbsd:pmap_remove_pte+0x212
 pmap_remove() at netbsd:pmap_remove+0x23d
 uvm_unmap_remove() at netbsd:uvm_unmap_remove+0x207
 uvmspace_free() at netbsd:uvmspace_free+0xe4
 exit1() at netbsd:exit1+0x1a0
 sigexit() at netbsd:sigexit+0x15a
 sendsig() at netbsd:sendsig
 lwp_userret() at netbsd:lwp_userret+0x1be
 trap() at netbsd:trap+0x926
 --- trap (number 3) ---
 cpu7: End traceback...
 
 dumping to dev 20,1 (offset=327, size=8272343):
 dump device not ready
 
 Alex