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Message-Id: <200907311709.n6VH9C3T094507@catflap.bishopston.net>
Date: Fri, 31 Jul 2009 18:09:12 +0100 (BST)
From: Jamie Landeg Jones <jamie@bishopston.net>
Reply-To: Jamie Landeg Jones <jamie@bishopston.net>
To: FreeBSD-gnats-submit@freebsd.org
Cc:
Subject: reproducable kernel panic: page fault FreeBSD 7.2-STABLE
X-Send-Pr-Version: 3.113
X-GNATS-Notify:

>Number:         137310
>Category:       kern
>Synopsis:       [kernel] [panic] reproducable kernel panic: page fault FreeBSD 7.2-STABLE [regression]
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kib
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jul 31 17:20:04 UTC 2009
>Closed-Date:    Sat Sep 05 13:36:01 UTC 2009
>Last-Modified:  Wed Nov 10 23:40:08 UTC 2010
>Originator:     Jamie Landeg Jones
>Release:        FreeBSD 7.2-STABLE i386
>Organization:
>Environment:
System: FreeBSD catflap.bishopston.net 7.2-STABLE FreeBSD 7.2-STABLE #0: Fri Jul 17 14:13:53 BST 2009 root@catflap.bishopston.net:/usr/obj/usr/src/sys/CATFLAP i386

7.2-Stable cvs'ed 17th July 2009.


	
>Description:
Exact same kernel panic as shown below everytime I start rsync. It also panics if rsync is run non-root.

rsync built from ports with:

 | # No user-servicable parts inside!
 | # Options for rsync-3.0.6
 | _OPTIONS_READ=rsync-3.0.6
 | WITHOUT_POPT_PORT=true
 | WITH_SSH=true
 | WITH_FLAGS=true
 | WITHOUT_ATIMES=true
 | WITH_ACL=true
 | WITHOUT_ICONV=true
 | WITHOUT_TIMELIMIT=true

offending line (within script) : 

 |         /usr/local/bin/rsync --rsh="ssh -4p 9621" --timeout=1800 -rltHzxS --bwlimit=200 --delete --sparse --fake-super  --partial --partial-dir==../../PARTIAL/ --temp-dir=../../TMP/ --compare-dest=../../TMP/ --exclude-from="/usr/catflap/data/do_remote_backup/$remote.exclude" --backup --stats --backup-dir=../../OLD/$date/$remote "$local" jamie@catnip.bishopston.net:/usr/users/jamie/CATFLAPBACKUPS/backup/$remote

same script worked with 6.2
	
>How-To-Repeat:
	
run rsync!
>Fix:


	

--- info.20090730 begins here ---
Dump header from device /dev/ad0s1b
  Architecture: i386
  Architecture Version: 2
  Dump Length: 239001600B (227 MB)
  Blocksize: 512
  Dumptime: Thu Jul 30 14:40:19 2009
  Hostname: catflap.bishopston.net
  Magic: FreeBSD Kernel Dump
  Version String: FreeBSD 7.2-STABLE #0: Fri Jul 17 14:13:53 BST 2009
    root@catflap.bishopston.net:/usr/obj/usr/src/sys/CATFLAP
  Panic String: page fault
  Dump Parity: 3373992290
  Bounds: 0
  Dump Status: good

GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd"...

Unread portion of the kernel message buffer:
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x18
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc055463c
stack pointer           = 0x28:0xe659fa20
frame pointer           = 0x28:0xe659fa2c
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 907 (rsync)
trap number             = 12
panic: page fault
Uptime: 17h34m28s
Physical memory: 1006 MB
Dumping 227 MB: 212 196 180 164 148 132 116 100 84 68 52 36 20 4

Reading symbols from /boot/kernel/acpi.ko...Reading symbols from /boot/kernel/acpi.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/acpi.ko
Reading symbols from /boot/kernel/linux.ko...Reading symbols from /boot/kernel/linux.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /boot/kernel/linprocfs.ko...Reading symbols from /boot/kernel/linprocfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linprocfs.ko
Reading symbols from /boot/kernel/linsysfs.ko...Reading symbols from /boot/kernel/linsysfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linsysfs.ko
Reading symbols from /usr/local/modules/rtc.ko...done.
Loaded symbols for /usr/local/modules/rtc.ko
#0  doadump () at pcpu.h:196
196             __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb) 
(kgdb) list *0xc055463c
0xc055463c is in turnstile_broadcast (/usr/src/sys/kern/subr_turnstile.c:836).
831     
832             /*
833              * Transfer the blocked list to the pending list.
834              */
835             mtx_lock_spin(&td_contested_lock);
836             TAILQ_CONCAT(&ts->ts_pending, &ts->ts_blocked[queue], td_lockq);
837             mtx_unlock_spin(&td_contested_lock);
838     
839             /*
840              * Give a turnstile to each thread.  The last thread gets
841              * this turnstile if the turnstile is empty.
842              */
843             TAILQ_FOREACH(td, &ts->ts_pending, td_lockq) {
844                     if (LIST_EMPTY(&ts->ts_free)) {
845                             MPASS(TAILQ_NEXT(td, td_lockq) == NULL);
846                             ts1 = ts;
847     #ifdef TURNSTILE_PROFILING
848                             tc->tc_depth--;
849     #endif
850                     } else
851                             ts1 = LIST_FIRST(&ts->ts_free);
852                     MPASS(ts1 != NULL);
853                     LIST_REMOVE(ts1, ts_hash);
854                     td->td_turnstile = ts1;
855             }
856     }
857     
858     /*
859      * Wakeup all threads on the pending list and adjust the priority of the
860      * current thread appropriately.  This must be called with the turnstile
861      * chain locked.
862      */
863     void
864     turnstile_unpend(struct turnstile *ts, int owner_type)
865     {
866             TAILQ_HEAD( ,thread) pending_threads;
867             struct turnstile *nts;
868             struct thread *td;
869             u_char cp, pri;
870     
871             MPASS(ts != NULL);
872             mtx_assert(&ts->ts_lock, MA_OWNED);
873             MPASS(ts->ts_owner == curthread ||
874                 (owner_type == TS_SHARED_LOCK && ts->ts_owner == NULL));
875             MPASS(!TAILQ_EMPTY(&ts->ts_pending));
876     
877             /*
878              * Move the list of pending threads out of the turnstile and
879              * into a local variable.
880              */
881             TAILQ_INIT(&pending_threads);
882             TAILQ_CONCAT(&pending_threads, &ts->ts_pending, td_lockq);
883     #ifdef INVARIANTS
884             if (TAILQ_EMPTY(&ts->ts_blocked[TS_EXCLUSIVE_QUEUE]) &&
885                 TAILQ_EMPTY(&ts->ts_blocked[TS_SHARED_QUEUE]))
886                     ts->ts_lockobj = NULL;
887     #endif
888             /*
889              * Adjust the priority of curthread based on other contested
890              * locks it owns.  Don't lower the priority below the base
(kgdb) back
#0  doadump () at pcpu.h:196
#1  0xc05234da in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:418
#2  0xc05236d9 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:574
#3  0xc07795bc in trap_fatal (frame=0xe659f9e0, eva=24) at /usr/src/sys/i386/i386/trap.c:938
#4  0xc0779eb9 in trap (frame=0xe659f9e0) at /usr/src/sys/i386/i386/trap.c:319
#5  0xc076331b in calltrap () at /usr/src/sys/i386/i386/exception.s:166
#6  0xc055463c in turnstile_broadcast (ts=0x0, queue=0) at /usr/src/sys/kern/subr_turnstile.c:835
#7  0xc05143ca in _mtx_unlock_sleep (m=0xc3d91020, opts=0, file=0x0, line=0) at /usr/src/sys/kern/kern_mutex.c:619
#8  0xc04c469f in pfs_getextattr (va=0xe659fab4) at pseudofs_internal.h:110
#9  0xc078db53 in VOP_GETEXTATTR_APV (vop=0xc07dbda0, a=0xe659fab4) at vnode_if.c:2451
#10 0xc058ee7c in extattr_get_vp (vp=0xc80c9678, attrnamespace=1, attrname=0xe659fb29 "rsync.%stat", data=0xbfbfc080, nbytes=255, td=0xc4bb1460) at vnode_if.h:1327
#11 0xc058efec in extattr_get_link (td=0xc4bb1460, uap=0xe659fcfc) at /usr/src/sys/kern/vfs_extattr.c:495
#12 0xc0779b51 in syscall (frame=0xe659fd38) at /usr/src/sys/i386/i386/trap.c:1089
#13 0xc0763380 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:262
#14 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb) [189C  
15:03 (2) "crash" root@catflap# ^D
Script done on Thu Jul 30 15:03:59 2009
--- info.20090730 ends here ---


>Release-Note:
>Audit-Trail:

From: Jamie Landeg Jones <jamie@bishopston.net>
To: jamie@bishopston.net, FreeBSD-gnats-submit@FreeBSD.org,
        freebsd-bugs@FreeBSD.org
Cc:  
Subject: Re: kern/137310: reproducable kernel panic: page fault FreeBSD
 7.2-STABLE
Date: Sun, 02 Aug 2009 20:02:15 +0100

 Further testing has shown that it's the "--fake-super" attribute that
 triggers the panic..

From: Jamie Landeg Jones <jamie@bishopston.net>
To: FreeBSD-gnats-submit@FreeBSD.org
Cc:  
Subject: Re: kern/137310: reproducable kernel panic: page fault FreeBSD
 7.2-STABLE
Date: Thu, 20 Aug 2009 16:13:11 +0100

 This is a multi-part message in MIME format.
 
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 Content-Type: text/plain; charset=us-ascii
 Content-Transfer-Encoding: 7bit
 Content-Disposition: inline
 
 
 Also occurs in 8.0-BETA2
 
 
 --=_4a8d6807.ZUT2Fiky2wRmBS/l+DzoioihvRRAQgbvuSxZGcKRJnWC5eKu
 Content-Type: text/plain;
  charset=us-ascii
 Content-Transfer-Encoding: 7bit
 Content-Disposition: attachment;
  filename="typescript"
 
 GNU gdb 6.1.1 [FreeBSD]
 Copyright 2004 Free Software Foundation, Inc.
 GDB is free software, covered by the GNU General Public License, and you are
 welcome to change it and/or distribute copies of it under certain conditions.
 Type "show copying" to see the conditions.
 There is absolutely no warranty for GDB.  Type "show warranty" for details.
 This GDB was configured as "i386-marcel-freebsd"...
 
 Unread portion of the kernel message buffer:
 kernel trap 12 with interrupts disabled
 
 
 Fatal trap 12: page fault while in kernel mode
 cpuid = 0; apic id = 00
 fault virtual address   = 0x14
 fault code              = supervisor read, page not present
 instruction pointer     = 0x20:0xc064c150
 stack pointer           = 0x28:0xe70649fc
 frame pointer           = 0x28:0xe7064a18
 code segment            = base 0x0, limit 0xfffff, type 0x1b
                         = DPL 0, pres 1, def32 1, gran 1
 processor eflags        = resume, IOPL = 0
 current process         = 9475 (rsync)
 trap number             = 12
 panic: page fault
 cpuid = 0
 Uptime: 3h39m11s
 Physical memory: 1463 MB
 Dumping 206 MB: 191 175 159 143 127 111 95 79 63 47 (CTRL-C to abort)  31 (CTRL-C to abort)  15 (CTRL-C to abort)  (CTRL-C to abort) 
 
 Reading symbols from /boot/kernel/ntfs.ko...Reading symbols from /boot/kernel/ntfs.ko.symbols...done.
 done.
 Loaded symbols for /boot/kernel/ntfs.ko
 Reading symbols from /boot/kernel/linprocfs.ko...Reading symbols from /boot/kernel/linprocfs.ko.symbols...done.
 done.
 Loaded symbols for /boot/kernel/linprocfs.ko
 Reading symbols from /boot/kernel/linsysfs.ko...Reading symbols from /boot/kernel/linsysfs.ko.symbols...done.
 done.
 Loaded symbols for /boot/kernel/linsysfs.ko
 Reading symbols from /usr/local/modules/fuse.ko...done.
 Loaded symbols for /usr/local/modules/fuse.ko
 Reading symbols from /boot/kernel/fade_saver.ko...Reading symbols from /boot/kernel/fade_saver.ko.symbols...done.
 done.
 Loaded symbols for /boot/kernel/fade_saver.ko
 Reading symbols from /usr/local/modules/rtc.ko...done.
 Loaded symbols for /usr/local/modules/rtc.ko
 #0  doadump () at pcpu.h:246
 246             __asm __volatile("movl %%fs:0,%0" : "=r" (td));
 (kgdb) list *0xc064c150
 0xc064c150 is in turnstile_broadcast (/usr/src/sys/kern/subr_turnstile.c:831).
 826     
 827             /*
 828              * Transfer the blocked list to the pending list.
 829              */
 830             mtx_lock_spin(&td_contested_lock);
 831             TAILQ_CONCAT(&ts->ts_pending, &ts->ts_blocked[queue], td_lockq);
 832             mtx_unlock_spin(&td_contested_lock);
 833     
 834             /*
 835              * Give a turnstile to each thread.  The last thread gets
 836              * this turnstile if the turnstile is empty.
 837              */
 838             TAILQ_FOREACH(td, &ts->ts_pending, td_lockq) {
 839                     if (LIST_EMPTY(&ts->ts_free)) {
 840                             MPASS(TAILQ_NEXT(td, td_lockq) == NULL);
 841                             ts1 = ts;
 842     #ifdef TURNSTILE_PROFILING
 843                             tc->tc_depth--;
 844     #endif
 845                     } else
 846                             ts1 = LIST_FIRST(&ts->ts_free);
 847                     MPASS(ts1 != NULL);
 848                     LIST_REMOVE(ts1, ts_hash);
 849                     td->td_turnstile = ts1;
 850             }
 851     }
 852     
 853     /*
 854      * Wakeup all threads on the pending list and adjust the priority of the
 855      * current thread appropriately.  This must be called with the turnstile
 856      * chain locked.
 857      */
 858     void
 859     turnstile_unpend(struct turnstile *ts, int owner_type)
 860     {
 861             TAILQ_HEAD( ,thread) pending_threads;
 862             struct turnstile *nts;
 863             struct thread *td;
 864             u_char cp, pri;
 865     
 866             MPASS(ts != NULL);
 867             mtx_assert(&ts->ts_lock, MA_OWNED);
 868             MPASS(ts->ts_owner == curthread || ts->ts_owner == NULL);
 869             MPASS(!TAILQ_EMPTY(&ts->ts_pending));
 870     
 871             /*
 872              * Move the list of pending threads out of the turnstile and
 873              * into a local variable.
 874              */
 875             TAILQ_INIT(&pending_threads);
 (kgdb) back
 #0  doadump () at pcpu.h:246
 #1  0xc0615843 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:416
 #2  0xc0615b26 in panic (fmt=Variable "fmt" is not available.
 ) at /usr/src/sys/kern/kern_shutdown.c:579
 #3  0xc088d3cd in trap_fatal (frame=0xe70649bc, eva=20) at /usr/src/sys/i386/i386/trap.c:931
 #4  0xc088dcf3 in trap (frame=0xe70649bc) at /usr/src/sys/i386/i386/trap.c:323
 #5  0xc0872b7b in calltrap () at /usr/src/sys/i386/i386/exception.s:165
 #6  0xc064c150 in turnstile_broadcast (ts=0x0, queue=0) at /usr/src/sys/kern/subr_turnstile.c:831
 #7  0xc06069e7 in _mtx_unlock_sleep (m=0xc4af92a0, opts=0, file=0x0, line=0) at /usr/src/sys/kern/kern_mutex.c:677
 #8  0xc05b338d in pfs_getextattr (va=0xe7064aa0) at pseudofs_internal.h:110
 #9  0xc089d9e3 in VOP_GETEXTATTR_APV (vop=0xc0936f80, a=0xe7064aa0) at vnode_if.c:2978
 #10 0xc068983c in extattr_get_vp (vp=0xc4a2353c, attrnamespace=1, attrname=0xe7064b71 "rsync.%stat", data=0xbfbfb2b0, nbytes=255, td=0xc54f4230) at vnode_if.h:1332
 #11 0xc06899b0 in extattr_get_link (td=0xc54f4230, uap=0xe7064cf8) at /usr/src/sys/kern/vfs_extattr.c:492
 #12 0xc088d942 in syscall (frame=0xe7064d38) at /usr/src/sys/i386/i386/trap.c:1071
 #13 0xc0872be0 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:261
 #14 0x00000033 in ?? ()
 Previous frame inner to this frame (corrupt stack?)
 (kgdb) 
 
 --=_4a8d6807.ZUT2Fiky2wRmBS/l+DzoioihvRRAQgbvuSxZGcKRJnWC5eKu--

From: dfilter@FreeBSD.ORG (dfilter service)
To: bug-followup@FreeBSD.org
Cc:  
Subject: Re: kern/137310: commit references a PR
Date: Mon, 31 Aug 2009 09:26:20 +0000 (UTC)

 Author: kib
 Date: Mon Aug 31 09:26:04 2009
 New Revision: 196689
 URL: http://svn.freebsd.org/changeset/base/196689
 
 Log:
   Remove spurious pfs_unlock().
   
   PR:	kern/137310
   Reviewed by:	des
   MFC after:	3 days
 
 Modified:
   head/sys/fs/pseudofs/pseudofs_vnops.c
 
 Modified: head/sys/fs/pseudofs/pseudofs_vnops.c
 ==============================================================================
 --- head/sys/fs/pseudofs/pseudofs_vnops.c	Mon Aug 31 09:20:37 2009	(r196688)
 +++ head/sys/fs/pseudofs/pseudofs_vnops.c	Mon Aug 31 09:26:04 2009	(r196689)
 @@ -339,7 +339,6 @@ pfs_getextattr(struct vop_getextattr_arg
  	if (proc != NULL)
  		PROC_UNLOCK(proc);
  
 -	pfs_unlock(pn);
  	PFS_RETURN (error);
  }
  
 _______________________________________________
 svn-src-all@freebsd.org mailing list
 http://lists.freebsd.org/mailman/listinfo/svn-src-all
 To unsubscribe, send any mail to "svn-src-all-unsubscribe@freebsd.org"
 

From: Jamie Landeg Jones <jamie@bishopston.net>
To: jamie@bishopston.net, FreeBSD-gnats-submit@FreeBSD.org,
        freebsd-bugs@FreeBSD.org
Cc: kostikbel@gmail.com
Subject: Re: kern/137310: reproducable kernel panic: page fault FreeBSD
 7.2-STABLE
Date: Tue, 01 Sep 2009 17:54:54 +0100

 I tried that patch and it does indeed fix the problem.
 
 Please feel free to close this PR when you want.
 
 Thanks,
 
 Jamie
State-Changed-From-To: open->patched 
State-Changed-By: linimon 
State-Changed-When: Wed Sep 2 09:29:49 UTC 2009 
State-Changed-Why:  
set as MFC reminder. 


Responsible-Changed-From-To: freebsd-bugs->kib 
Responsible-Changed-By: linimon 
Responsible-Changed-When: Wed Sep 2 09:29:49 UTC 2009 
Responsible-Changed-Why:  

http://www.freebsd.org/cgi/query-pr.cgi?pr=137310 
State-Changed-From-To: patched->closed 
State-Changed-By: kib 
State-Changed-When: Sat Sep 5 13:35:37 UTC 2009 
State-Changed-Why:  
Fix is in RELENG_7 and RELENG_8. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=137310 

From: dfilter@FreeBSD.ORG (dfilter service)
To: bug-followup@FreeBSD.org
Cc:  
Subject: Re: kern/137310: commit references a PR
Date: Wed, 10 Nov 2010 23:36:18 +0000 (UTC)

 Author: cperciva
 Date: Wed Nov 10 23:36:13 2010
 New Revision: 215103
 URL: http://svn.freebsd.org/changeset/base/215103
 
 Log:
   Don't unlock a mutex which wasn't locked.
   
   PR:		kern/137310
   Approved by:	so (cperciva)
   Security:	FreeBSD-SA-10:09.pseudofs
 
 Modified:
   releng/7.1/UPDATING
   releng/7.1/sys/conf/newvers.sh
   releng/7.1/sys/fs/pseudofs/pseudofs_vnops.c
 
 Modified: releng/7.1/UPDATING
 ==============================================================================
 --- releng/7.1/UPDATING	Wed Nov 10 21:06:49 2010	(r215102)
 +++ releng/7.1/UPDATING	Wed Nov 10 23:36:13 2010	(r215103)
 @@ -8,6 +8,9 @@ Items affecting the ports and packages s
  /usr/ports/UPDATING.  Please read that file before running
  portupgrade.
  
 +20101110:	p15	FreeBSD-SA-10:09.pseudofs
 +	Don't unlock a mutex which wasn't locked.
 +
  20100920:	p14	FreeBSD-SA-10:08.bzip2
  	Fix an integer overflow in RLE length parsing when decompressing
  	corrupt bzip2 data.
 
 Modified: releng/7.1/sys/conf/newvers.sh
 ==============================================================================
 --- releng/7.1/sys/conf/newvers.sh	Wed Nov 10 21:06:49 2010	(r215102)
 +++ releng/7.1/sys/conf/newvers.sh	Wed Nov 10 23:36:13 2010	(r215103)
 @@ -32,7 +32,7 @@
  
  TYPE="FreeBSD"
  REVISION="7.1"
 -BRANCH="RELEASE-p14"
 +BRANCH="RELEASE-p15"
  if [ "X${BRANCH_OVERRIDE}" != "X" ]; then
  	BRANCH=${BRANCH_OVERRIDE}
  fi
 
 Modified: releng/7.1/sys/fs/pseudofs/pseudofs_vnops.c
 ==============================================================================
 --- releng/7.1/sys/fs/pseudofs/pseudofs_vnops.c	Wed Nov 10 21:06:49 2010	(r215102)
 +++ releng/7.1/sys/fs/pseudofs/pseudofs_vnops.c	Wed Nov 10 23:36:13 2010	(r215103)
 @@ -305,7 +305,6 @@ pfs_getextattr(struct vop_getextattr_arg
  	if (proc != NULL)
  		PROC_UNLOCK(proc);
  
 -	pfs_unlock(pn);
  	PFS_RETURN (error);
  }
  
 _______________________________________________
 svn-src-all@freebsd.org mailing list
 http://lists.freebsd.org/mailman/listinfo/svn-src-all
 To unsubscribe, send any mail to "svn-src-all-unsubscribe@freebsd.org"
 
>Unformatted:
