Re: kern/56164: System panicked: kernel diagnostic assertion "(target->prt_class == class)" failed: file "/src/src/sys/kern/subr_psref.c", line 296 mismatched psref target class: 0x0 (ref) != 0xffffd2ef411bc940 (expected)

[Andrius V <vezhlys%gmail.com@localhost>]

The following reply was made to PR kern/56164; it has been noted by GNATS.

From: Andrius V <vezhlys%gmail.com@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, 
	nia%pkgsrc.org@localhost
Subject: Re: kern/56164: System panicked: kernel diagnostic assertion
 "(target->prt_class == class)" failed: file "/src/src/sys/kern/subr_psref.c",
 line 296 mismatched psref target class: 0x0 (ref) != 0xffffd2ef411bc940 (expected)
Date: Tue, 18 May 2021 19:02:46 +0300

 Yes, I had similar crash on headset removal, mentioned in
 port-amd64/56172 thread. I easily reproduce by removing my Jabra
 headset while sound plays on audiocfg test.
 
 On Tue, May 18, 2021 at 4:20 PM nia <nia%netbsd.org@localhost> wrote:
 >
 > The following reply was made to PR kern/56164; it has been noted by GNATS.
 >
 > From: nia <nia%NetBSD.org@localhost>
 > To: gnats-bugs%netbsd.org@localhost
 > Cc:
 > Subject: Re: kern/56164: System panicked: kernel diagnostic assertion
 >  "(target->prt_class == class)" failed: file
 >  "/src/src/sys/kern/subr_psref.c", line 296 mismatched psref target class:
 >  0x0 (ref) != 0xffffd2ef411bc940 (expected)
 > Date: Tue, 18 May 2021 13:17:12 +0000
 >
 >  Gah, it appears to be audio (possibly uaudio) related.
 >
 >  [  9180.811329] panic: kernel diagnostic assertion "(target->prt_class == class)" failed: file "/src/src/sys/kern/subr_psref.c", line 296 mismatched psref target class: 0x0 (ref) != 0xfffff76135d8a080 (expected)
 >  [  9180.811329] cpu2: Begin traceback...
 >  [  9180.821329] vpanic() at netbsd:vpanic+0x230
 >  [  9180.821329] db_print_address.cold() at netbsd:db_print_address.cold
 >  [  9180.821329] psref_acquire() at netbsd:psref_acquire+0x4e0
 >  [  9180.831327] audio_sc_acquire_fromfile() at netbsd:audio_sc_acquire_fromfile+0xc6
 >  [  9180.831327] audioclose() at netbsd:audioclose+0x136
 >  [  9180.841327] closef() at netbsd:closef+0x17f
 >  [  9180.841327] fd_free() at netbsd:fd_free+0x3c5
 >  [  9180.841327] exit1() at netbsd:exit1+0x301
 >  [  9180.851327] sys_exit() at netbsd:sys_exit+0xb0
 >  [  9180.851327] syscall() at netbsd:syscall+0x26b
 >  [  9180.861328] --- syscall (number 1) ---
 >  [  9180.861328] netbsd:syscall+0x26b:
 >  [  9180.861328] cpu2: End traceback...
 >
 >  Still don't have an intact dump, unfortunately...
 >