Date: Tue, 26 Jul 2005 09:22:50 +0300 From: Danny Braniss <danny@cs.huji.ac.il> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/84107: unionfs related panic Message-ID: <E1DxIq2-000Imo-0v@x-dev.cs.huji.ac.il> Resent-Message-ID: <200507260630.j6Q6UGqY035362@freefall.freebsd.org>
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>Number: 84107
>Category: kern
>Synopsis: unionfs related panic
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Jul 26 06:30:16 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator: Danny Braniss
>Release: FreeBSD 6.0-BETA1 i386
>Organization:
>Environment:
System: FreeBSD shuttle-2 6.0-BETA1 FreeBSD 6.0-BETA1 #2: Fri Jul 22 12:41:55 IDT 2005 danny@x-dev:/r+d/obj/x-dev/r+d/6.0/src/sys/HUJI i386
>Description:
executing a mv (rename) in a union fs causes:
panic: lockmgr: locking against myself
cpuid = 0
KDB: enter: panic
[thread pid 3818 tid 100096 ]
Stopped at kdb_enter+0x2b: nop
db> tr
Tracing pid 3818 tid 100096 td 0xc1db1180
kdb_enter(c086b4bf) at kdb_enter+0x2b
panic(c086a0cf,c1db1180,0,c08cd020,d6b46ad8) at panic+0x127
lockmgr(c1e02498,3002,c1e024bc,c1db1180,d6b46ab4) at lockmgr+0x3a6
vop_stdlock(d6b46ad8,1002,c1e02440,d6b46af4,c069f920) at vop_stdlock+0x1e
VOP_LOCK_APV(c1d9d240,d6b46ad8) at VOP_LOCK_APV+0x43
vn_lock(c1e02440,1002,c1db1180) at vn_lock+0xf4
lookup(d6b46c18,c1e73000,1,c1db1180,d6b46c40) at lookup+0xc9
namei(d6b46c18,1,0,c10493dc,c1040878) at namei+0x396
kern_rename(c1db1180,bfbfea37,bfbfea43,0,d6b46d30) at kern_rename+0xf4
rename(c1db1180,d6b46d04,2,1,292) at rename+0x15
syscall(3b,3b,3b,bfbfe938,bfbfea37) at syscall+0x2bb
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (128, FreeBSD ELF32, rename), eip = 0x280b6f27, esp = 0xbfbfdd8c, ebp = 0xbfbfe408 ---
>How-To-Repeat:
kldload unionfs
/sbin/mdmfs -i 4096 -s 4096 -M md /conf/etc
chmod 755 /conf/etc
mount_unionfs /conf/etc /etc
ls -R /etc > /dev/null
mv /etc/somefile /etc/smfl
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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