NetBSD Problem Report #55238

From kardel@Kardel.name  Wed May  6 10:10:32 2020
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Message-Id: <20200506101029.2E2FF44B3E@Andromeda.Kardel.name>
Date: Wed,  6 May 2020 12:10:29 +0200 (CEST)
From: kardel@netbsd.org
Reply-To: kardel@netbsd.org
To: gnats-bugs@NetBSD.org
Subject: panic: kernel diagnostic assertion "M_LEADINGSPACE(m) >= (m->m_pkthdr.len - m->m_len)" failed: file "/usr/src/sys/kern/uipc_mbuf.c", line 1684
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>Number:         55238
>Category:       kern
>Synopsis:       panic: kernel diagnostic assertion "M_LEADINGSPACE(m) >= (m->m_pkthdr.len - m->m_len)" failed: file "/usr/src/sys/kern/uipc_mbuf.c", line 1684
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 06 10:15:00 +0000 2020
>Closed-Date:    Wed May 06 10:38:25 +0000 2020
>Last-Modified:  Wed May 06 10:45:01 +0000 2020
>Originator:     kardel@netbsd.org
>Release:        NetBSD 9.99.60
>Organization:

>Environment:


System: NetBSD Toblerone 9.99.60 NetBSD 9.99.60 (XEN3_DOMU) #5: Tue May  5 18:25:19 CEST 2020 kardel@Toblerone:/usr/src/sys/arch/amd64/compile/obj/XEN3_DOM0 amd64
Architecture: x86_64
Machine: amd64
>Description:
	amd64 -current 9.99.60@20200505 panics during network write.

[ 258.0289860] panic: kernel diagnostic assertion "M_LEADINGSPACE(m) >= (m->m_pkthdr.len - m->m_len)" failed: file "/usr/src/sys/kern/uipc_mbuf.c", line 1684 
[ 258.0289860] cpu1: Begin traceback...
[ 258.0289860] vpanic() at netbsd:vpanic+0x146
[ 258.0289860] kern_assert() at netbsd:kern_assert+0x48
[ 258.0289860] m_defrag() at netbsd:m_defrag+0x408
[ 258.0289860] xennet_start() at netbsd:xennet_start+0xc7
[ 258.0289860] if_transmit() at netbsd:if_transmit+0x107
[ 258.0289860] ether_output() at netbsd:ether_output+0x42d
[ 258.0289860] ip_output() at netbsd:ip_output+0x1343
[ 258.0289860] tcp_output() at netbsd:tcp_output+0x199d
[ 258.0289860] tcp_send_wrapper() at netbsd:tcp_send_wrapper+0xa6
[ 258.0289860] sosend() at netbsd:sosend+0x7d8
[ 258.0289860] soo_write() at netbsd:soo_write+0x2c
[ 258.0289860] dofilewrite() at netbsd:dofilewrite+0x7a
[ 258.0289860] sys_write() at netbsd:sys_write+0x49
[ 258.0289860] syscall() at netbsd:syscall+0x9c
[ 258.0289860] --- syscall (number 4) ---
[ 258.0289860] 7080d124297a:
[ 258.0289860] cpu1: End traceback...
[ 258.0289860] rebooting...

>How-To-Repeat:
	run 9.99.60@20200505 with a java application serving web requests. Observe
	kernel diagnostic assertion "M_LEADINGSPACE(m) >= (m->m_pkthdr.len - m->m_len)" failed: file "/usr/src/sys/kern/uipc_mbuf.c", line 1684

>Fix:
	- not available -

>Release-Note:

>Audit-Trail:

State-Changed-From-To: open->closed
State-Changed-By: jdolecek@NetBSD.org
State-Changed-When: Wed, 06 May 2020 10:38:25 +0000
State-Changed-Why:
Also already fixed - rev. 1.241 of sys/kern/uipc_mbuf.c


From: Frank Kardel <kardel@netbsd.org>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: kern/55238 (panic: kernel diagnostic assertion "M_LEADINGSPACE(m)
 >= (m->m_pkthdr.len - m->m_len)" failed: file
 "/usr/src/sys/kern/uipc_mbuf.c", line 1684)
Date: Wed, 6 May 2020 12:41:52 +0200

 Thanks, will update.


 On 05/06/20 12:38, jdolecek@NetBSD.org wrote:
 > Synopsis: panic: kernel diagnostic assertion "M_LEADINGSPACE(m) >= (m->m_pkthdr.len - m->m_len)" failed: file "/usr/src/sys/kern/uipc_mbuf.c", line 1684
 >
 > State-Changed-From-To: open->closed
 > State-Changed-By: jdolecek@NetBSD.org
 > State-Changed-When: Wed, 06 May 2020 10:38:25 +0000
 > State-Changed-Why:
 > Also already fixed - rev. 1.241 of sys/kern/uipc_mbuf.c
 >
 >
 >

>Unformatted:

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