Date: Thu, 8 Mar 2001 13:27:14 +0100 From: Andrea Campi <andrea@webcom.it> To: current@freebsd.org Subject: Panic mounting msdos fs Message-ID: <20010308132714.A569@webcom.it>
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Yesterday -current:
# mount /msdos
Acquring duplicate lock of same type: "lockmgr interlock"
1st @ ../../kern/kern_lock.c:239
2nd @ ../../kern/kern_lock.c:239
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x0
fault code = supervisor write, page not present
instruction pointer = 0x8:0xc015c3f5
stack pointer = 0x10:0xc7821ce4
frame pointer = 0x10:0xc7821cf0
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 489 (mount_msdos)
kernel: type 12 trap, code=0
Stopped at witness_exit+0x23d: movl %eax,0(%edx)
db>
I am attaching output of a few "show" commands from debug...
--
Weird enough for government work.
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trace
witness_exit(c780634c,0,c024085a,f1,c780634c,1,c024085a,f1) at witness_exit=
+0x23d
lockmgr(c780637c,1010002,c780634c,c77a3980,c7821d70) at lockmgr+0xf5
vop_stdlock(c7821d60) at vop_stdlock+0x1f
vn_lock(c78062e0,10002,c77a3980,c780634c,c0e8fb80) at vn_lock+0x186
vget(c78062e0,10002,c77a3980,c0df1400,4) at vget+0x109
msdosfs_hashget(c0da7600,0,1fffffff,c7806760,4) at msdosfs_hashget+0x11b
deget(c0ea7000,0,1fffffff,c7821e1c,17d) at deget+0x41
msdosfs_root(c0df1400,c7821e4c) at msdosfs_root+0x20
vfs_mount(c77a3980,c0d7db40,c0e8fc00,0,bfbff8e8) at vfs_mount+0xc40
mount(c77a3980,c7821f80,bfbffd94,bfbffcc0,0) at mount+0x6a
syscall(2f,2f,2f,0,bfbffcc0) at syscall+0x6b1
syscall_with_err_pushed() at syscall_with_err_pushed+0x1b
db> show mu=08 =08=08 =08registers
cs 0x8
ds 0x10
es 0x10
fs 0x18
ss 0x10
eax 0xc02ade20 Giant
ecx 0xc0e7f040
edx 0
ebx 0xc780634c
esp 0xc7821ce4
ebp 0xc7821cf0
esi 0
edi 0xc0294ed8 w_data+0x1518
eip 0xc015c3f5 witness_exit+0x23d
efl 0x10282
witness_exit+0x23d: movl %eax,0(%edx)
db> show mutexes
"lockmgr interlock" (0xc05a8ef0) locked at ../../kern/kern_lock.c:239
"Giant" (0xc02ade20) locked at ../../i386/i386/trap.c:1169
db> who=08 =08=08 =08=08 =08show witness
Sleep mutexes:
0 rman head -- last acquired @ ../../kern/subr_rman.c:107
0 sf_bufs list lock -- last acquired @ ../../kern/uipc_syscalls.c:1437
0 vm86pcb lock -- last acquired @ ../../i386/i386/vm86.c:579
0 Giant -- last acquired @ ../../i386/i386/trap.c:1169
1 mbuf free list lock -- last acquired @ ../../kern/uipc_mbuf.c:591
1 vnode pollinfo -- last acquired @ ../../kern/vfs_subr.c:2761
1 vm object_list -- last acquired @ ../../vm/vm_object.c:456
1 ip_inq -- last acquired @ ../../netinet/ip_input.c:817
1 arp_inq -- last acquired @ ../../netinet/if_ether.c:446
1 eventhandler -- last acquired @ ../../kern/subr_eventhandler.c:76
3 lockmgr interlock -- last acquired @ ../../kern/kern_lock.c:239
5 process lock -- last acquired @ ../../i386/i386/trap.c:880
6 ucred -- last acquired @ ../../kern/kern_prot.c:1177
6 uidinfo hash -- last acquired @ ../../kern/kern_resource.c:765
7 malloc -- last acquired @ ../../kern/kern_malloc.c:317
7 uidinfo struct -- last acquired @ ../../kern/kern_resource.c:782
4 lockmgr -- last acquired @ ../../kern/kern_lock.c:505
5 process lock -- last acquired @ ../../i386/i386/trap.c:880
6 ucred -- last acquired @ ../../kern/kern_prot.c:1177
6 uidinfo hash -- last acquired @ ../../kern/kern_resource.c:765
7 malloc -- last acquired @ ../../kern/kern_malloc.c:317
7 uidinfo struct -- last acquired @ ../../kern/kern_resource.c:782
1 zone subsystem -- last acquired @ ../../vm/vm_zone.c:422
3 lockmgr interlock -- last acquired @ ../../kern/kern_lock.c:239
5 process lock -- last acquired @ ../../i386/i386/trap.c:880
6 ucred -- last acquired @ ../../kern/kern_prot.c:1177
6 uidinfo hash -- last acquired @ ../../kern/kern_resource.c:765
7 malloc -- last acquired @ ../../kern/kern_malloc.c:317
7 uidinfo struct -- last acquired @ ../../kern/kern_resource.c:782
3 zone -- last acquired @ ../../vm/vm_zone.c:366
4 lockmgr -- last acquired @ ../../kern/kern_lock.c:505
5 process lock -- last acquired @ ../../i386/i386/trap.c:880
6 ucred -- last acquired @ ../../kern/kern_prot.c:1177
6 uidinfo hash -- last acquired @ ../../kern/kern_resource.c:765
7 malloc -- last acquired @ ../../kern/kern_malloc.c:317
7 uidinfo struct -- last acquired @ ../../kern/kern_resource.c:782
1 bpf interface lock -- last acquired @ ../../net/bpf.c:1070
2 bpf1 -- last acquired @ ../../net/bpf.c:1074
2 bpf0 -- last acquired @ ../../net/bpf.c:1074
3 lockmgr interlock -- last acquired @ ../../kern/kern_lock.c:239
5 process lock -- last acquired @ ../../i386/i386/trap.c:880
6 ucred -- last acquired @ ../../kern/kern_prot.c:1177
6 uidinfo hash -- last acquired @ ../../kern/kern_resource.c:765
7 malloc -- last acquired @ ../../kern/kern_malloc.c:317
7 uidinfo struct -- last acquired @ ../../kern/kern_resource.c:782
1 ifsvgt -- last acquired @ ../../ufs/ffs/ffs_vfsops.c:1128
1 ep -- last acquired @ ../../dev/ep/if_ep.c:480
1 mcluster free list lock -- last acquired @ ../../kern/uipc_mbuf.c:591
1 m_ext counter free list lock -- last acquired @ ../../kern/uipc_mbuf.c:5=
91
1 ufs ihash -- last acquired @ ../../ufs/ufs/ufs_ihash.c:133
2 vnode interlock -- last acquired @ ../../kern/vfs_syscalls.c:375
3 lockmgr interlock -- last acquired @ ../../kern/kern_lock.c:239
5 process lock -- last acquired @ ../../i386/i386/trap.c:880
6 ucred -- last acquired @ ../../kern/kern_prot.c:1177
6 uidinfo hash -- last acquired @ ../../kern/kern_resource.c:765
7 malloc -- last acquired @ ../../kern/kern_malloc.c:317
7 uidinfo struct -- last acquired @ ../../kern/kern_resource.c:782
3 spechash -- last acquired @ ../../kern/vfs_subr.c:2003
3 mntvnode -- last acquired @ ../../kern/vfs_subr.c:650
3 vnode_free_list -- last acquired @ ../../kern/vfs_subr.c:2674
3 zone -- last acquired @ ../../vm/vm_zone.c:366
4 lockmgr -- last acquired @ ../../kern/kern_lock.c:505
5 process lock -- last acquired @ ../../i386/i386/trap.c:880
6 ucred -- last acquired @ ../../kern/kern_prot.c:1177
6 uidinfo hash -- last acquired @ ../../kern/kern_resource.c:765
7 malloc -- last acquired @ ../../kern/kern_malloc.c:317
7 uidinfo struct -- last acquired @ ../../kern/kern_resource.c:782
1 mntid -- last acquired @ ../../kern/vfs_subr.c:426
2 mountlist -- last acquired @ ../../kern/vfs_syscalls.c:379
3 lockmgr interlock -- last acquired @ ../../kern/kern_lock.c:239
5 process lock -- last acquired @ ../../i386/i386/trap.c:880
6 ucred -- last acquired @ ../../kern/kern_prot.c:1177
6 uidinfo hash -- last acquired @ ../../kern/kern_resource.c:765
7 malloc -- last acquired @ ../../kern/kern_malloc.c:317
7 uidinfo struct -- last acquired @ ../../kern/kern_resource.c:782
1 pccbb1 -- last acquired @ ../../dev/pccbb/pccbb.c:632
2 rman -- last acquired @ ../../kern/subr_rman.c:420
7 malloc -- last acquired @ ../../kern/kern_malloc.c:317
2 bpf global lock -- last acquired @ ../../net/bpf.c:921
3 zone -- last acquired @ ../../vm/vm_zone.c:366
4 lockmgr -- last acquired @ ../../kern/kern_lock.c:505
5 process lock -- last acquired @ ../../i386/i386/trap.c:880
6 ucred -- last acquired @ ../../kern/kern_prot.c:1177
6 uidinfo hash -- last acquired @ ../../kern/kern_resource.c:765
7 malloc -- last acquired @ ../../kern/kern_malloc.c:317
7 uidinfo struct -- last acquired @ ../../kern/kern_resource.c:782
1 pccbb0 -- last acquired @ ../../dev/pccbb/pccbb.c:632
7 malloc -- last acquired @ ../../kern/kern_malloc.c:317
1 random reseed -- last acquired @ ../../dev/random/yarrow.c:272
1 fork list -- last acquired @ ../../kern/kern_sx.c:138
1 buftime lock -- last acquired @ ../../sys/buf.h:255
3 lockmgr interlock -- last acquired @ ../../kern/kern_lock.c:239
5 process lock -- last acquired @ ../../i386/i386/trap.c:880
6 ucred -- last acquired @ ../../kern/kern_prot.c:1177
6 uidinfo hash -- last acquired @ ../../kern/kern_resource.c:765
7 malloc -- last acquired @ ../../kern/kern_malloc.c:317
7 uidinfo struct -- last acquired @ ../../kern/kern_resource.c:782
1 proctree -- last acquired @ order list:0
2 allproc -- last acquired @ order list:0
5 process lock -- last acquired @ ../../i386/i386/trap.c:880
6 ucred -- last acquired @ ../../kern/kern_prot.c:1177
6 uidinfo hash -- last acquired @ ../../kern/kern_resource.c:765
7 malloc -- last acquired @ ../../kern/kern_malloc.c:317
7 uidinfo struct -- last acquired @ ../../kern/kern_resource.c:782
Spin mutexes:
1 sio -- last acquired @ ../../isa/sio.c:1825
5 ithread table lock -- last acquired @ ../../i386/isa/intr_machdep.c:=
576
6 ithread list lock -- last acquired @ ../../kern/kern_intr.c:249
7 sched lock -- last acquired @ ../../kern/kern_clock.c:350
8 clk -- last acquired @ ../../i386/isa/clock.c:1192
9 callout -- last acquired @ ../../kern/kern_clock.c:203
Mutexes which were never acquired:
msdosfs dehash
lo
db>=20
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