Re: -CURRENT panics in NFS

2021-02-27 Thread Mateusz Guzik
Thanks. I adjusted the namecache. However, the nfs fix provided by
Rick should go in regardless.

On 2/27/21, Juraj Lutter  wrote:
>
>
>> On 27 Feb 2021, at 21:49, Mateusz Guzik  wrote:
>>
>> Can you dump 'struct componentname *cnp'? This should do the trick:
>> f 12
>> p cnp
>>
>> Most notably I want to know if the name to added is a literal dot.
>>
>
> Yes, it is a dot (the directory itself):
>
> cn_nameptr = 0xfe0011428018 ".", cn_namelen = 1
>
> otis
>
>


-- 
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Re: -CURRENT panics in NFS

2021-02-27 Thread Juraj Lutter



> On 27 Feb 2021, at 21:49, Mateusz Guzik  wrote:
> 
> Can you dump 'struct componentname *cnp'? This should do the trick:
> f 12
> p cnp
> 
> Most notably I want to know if the name to added is a literal dot.
> 

Yes, it is a dot (the directory itself):

cn_nameptr = 0xfe0011428018 ".", cn_namelen = 1

otis

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Re: -CURRENT panics in NFS

2021-02-27 Thread Mateusz Guzik
You should be able to just use kgdb on the old kernel and the
crashdump you already collected, provided both are still around.
Alternatively boot with this without the fix:

diff --git a/sys/kern/vfs_cache.c b/sys/kern/vfs_cache.c
index fef1e31d197b..c4d2990b155d 100644
--- a/sys/kern/vfs_cache.c
+++ b/sys/kern/vfs_cache.c
@@ -2266,6 +2266,9 @@ cache_enter_time(struct vnode *dvp, struct vnode
*vp, struct componentname *cnp,
KASSERT(cnp->cn_namelen <= NAME_MAX,
("%s: passed len %ld exceeds NAME_MAX (%d)", __func__,
cnp->cn_namelen,
NAME_MAX));
+   if (dvp == vp) {
+   panic("%s: same vnodes; cnp [%s] len %ld\n", __func__,
cnp->cn_nameptr, cnp->cn_namelen);
+   }
VNPASS(dvp != vp, dvp);
VNPASS(!VN_IS_DOOMED(dvp), dvp);
VNPASS(dvp->v_type != VNON, dvp);


On 2/27/21, Juraj Lutter  wrote:
> I am now running a patched kernel, without problems.
>
> I can boot to unpatched one and see the output of these ddb commands.
>
> otis
>
> —
> Juraj Lutter
> XMPP: juraj (at) lutter.sk
> GSM: +421907986576
>
>> On 27 Feb 2021, at 21:49, Mateusz Guzik  wrote:
>>
>> Can you dump 'struct componentname *cnp'? This should do the trick:
>> f 12
>> p cnp
>>
>
>
>


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Re: -CURRENT panics in NFS

2021-02-27 Thread Juraj Lutter
I am now running a patched kernel, without problems.

I can boot to unpatched one and see the output of these ddb commands.

otis

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XMPP: juraj (at) lutter.sk
GSM: +421907986576

> On 27 Feb 2021, at 21:49, Mateusz Guzik  wrote:
> 
> Can you dump 'struct componentname *cnp'? This should do the trick:
> f 12
> p cnp
> 


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Re: -CURRENT panics in NFS

2021-02-27 Thread Mateusz Guzik
Can you dump 'struct componentname *cnp'? This should do the trick:
f 12
p cnp

Most notably I want to know if the name to added is a literal dot.

That case is handled if necessary, but the assert was added to start
making the interface stricter. If the name is a dot I'll be inclined
to remove the assert for 13.x to avoid problems with other callers of
the sort.

Otherwise I'll have to check what's going on there.

On 2/27/21, Juraj Lutter  wrote:
> Hi,
>
> thank you for the swift reaction. This patch fixed my problem.
>
> otis
>
> —
> Juraj Lutter
> XMPP: juraj (at) lutter.sk
> GSM: +421907986576
>
>> On 27 Feb 2021, at 16:53, Rick Macklem  wrote:
>>
>> I reproduced the problem and the attached trivial patch
>> seems to fix it. Please test the patch if you can.
>>
>
>


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Re: -CURRENT panics in NFS

2021-02-27 Thread Juraj Lutter
Hi,

thank you for the swift reaction. This patch fixed my problem.

otis

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Juraj Lutter
XMPP: juraj (at) lutter.sk
GSM: +421907986576

> On 27 Feb 2021, at 16:53, Rick Macklem  wrote:
> 
> I reproduced the problem and the attached trivial patch
> seems to fix it. Please test the patch if you can.
> 

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Re: -CURRENT panics in NFS

2021-02-27 Thread Rick Macklem
I reproduced the problem and the attached trivial patch
seems to fix it. Please test the patch if you can.

Mateusz, I assume the directory shouldn't try and add
a cache entry for itself?
I don't test NFSv3 much and I don't test "rdirplus"
much, so it slipped through the cracks.

Thanks for reporting it, rick


From: owner-freebsd-curr...@freebsd.org  on 
behalf of Juraj Lutter 
Sent: Saturday, February 27, 2021 9:31 AM
To: freebsd-current
Subject: Re: -CURRENT panics in NFS

CAUTION: This email originated from outside of the University of Guelph. Do not 
click links or open attachments unless you recognize the sender and know the 
content is safe. If in doubt, forward suspicious emails to ith...@uoguelph.ca


And a kgdb backtrace:

(kgdb) bt
#0  __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55
#1  doadump (textdump=textdump@entry=0) at /usr/src/sys/kern/kern_shutdown.c:399
#2  0x804c7b2a in db_dump (dummy=, dummy2=, 
dummy3=, dummy4=) at /usr/src/sys/ddb/db_command.c:575
#3  0x804c78ee in db_command (last_cmdp=, 
cmd_table=, dopager=dopager@entry=1) at 
/usr/src/sys/ddb/db_command.c:482
#4  0x804c762d in db_command_loop () at 
/usr/src/sys/ddb/db_command.c:535
#5  0x804cac36 in db_trap (type=, code=) 
at /usr/src/sys/ddb/db_main.c:270
#6  0x80c59d04 in kdb_trap (type=type@entry=3, code=code@entry=0, 
tf=, tf@entry=0xfe00d01c3d40) at 
/usr/src/sys/kern/subr_kdb.c:727
#7  0x810bc1ee in trap (frame=0xfe00d01c3d40) at 
/usr/src/sys/amd64/amd64/trap.c:576
#8  
#9  kdb_enter (why=0x812accc9 "panic", msg=) at 
/usr/src/sys/kern/subr_kdb.c:506
#10 0x80c0d5d2 in vpanic (fmt=, ap=, 
ap@entry=0xfe00d01c3ea0) at /usr/src/sys/kern/kern_shutdown.c:907
#11 0x80c0d363 in panic (fmt=0x81e9a178  
"\177\256&\201\377\377\377\377") at /usr/src/sys/kern/kern_shutdown.c:843
#12 0x80cd6d74 in cache_enter_time (dvp=0xf80079321e00, 
vp=0xf80079321e00, cnp=cnp@entry=0xfe00d01c4030, 
tsp=tsp@entry=0xfe00d01c40e0, dtsp=)
at /usr/src/sys/kern/vfs_cache.c:2274
#13 0x80ae2bd6 in nfsrpc_readdirplus (vp=, 
vp@entry=0xf80079321e00, uiop=, 
uiop@entry=0xfe00d01c4540,
cookiep=cookiep@entry=0xfe00d01c44e0, 
cred=cred@entry=0xf80079307e00, p=, 
p@entry=0xfe00de06be00, nap=nap@entry=0xfe00d01c4400,
attrflagp=0xfe00d01c44f0, eofp=0xfe00d01c44f4, stuff=0x0) at 
/usr/src/sys/fs/nfsclient/nfs_clrpcops.c:3766
#14 0x80aed4ec in ncl_readdirplusrpc (vp=vp@entry=0xf80079321e00, 
uiop=uiop@entry=0xfe00d01c4540, cred=0xf80079307e00, 
td=td@entry=0xfe00de06be00)
at /usr/src/sys/fs/nfsclient/nfs_clvnops.c:2490
#15 0x80afdc93 in ncl_doio (vp=vp@entry=0xf80079321e00, 
bp=bp@entry=0xfe000ee1c610, cr=0xfe00d01c3d00, 
cr@entry=0xf80079307e00, td=td@entry=0xfe00de06be00,
called_from_strategy=called_from_strategy@entry=0) at 
/usr/src/sys/fs/nfsclient/nfs_clbio.c:1686
#16 0x80afce3c in ncl_bioread (vp=, 
vp@entry=0xf80079321e00, uio=, ioflag=ioflag@entry=0, 
cred=)
at /usr/src/sys/fs/nfsclient/nfs_clbio.c:604
#17 0x80af1baf in nfs_readdir (ap=ap@entry=0xfe00d01c4918) at 
/usr/src/sys/fs/nfsclient/nfs_clvnops.c:2383
#18 0x80ce490f in vop_sigdefer (vop=, 
a=0xfe00d01c4918) at /usr/src/sys/kern/vfs_default.c:1471
#19 0x81181f38 in VOP_READDIR_APV (vop=0x81af00d8 
, a=a@entry=0xfe00d01c4918) at vnode_if.c:1939
#20 0x80d0b23b in VOP_READDIR (vp=0xf80079321e00, 
uio=0xfe00d01c48d0, cred=, eofflag=0xfe00d01c48cc, 
ncookies=0x0, cookies=0x0) at ./vnode_if.h:985
#21 kern_getdirentries (td=, fd=, buf=0x801851000 
, count=4096, 
basep=basep@entry=0xfe00d01c49b0,
residp=residp@entry=0x0, bufseg=UIO_USERSPACE) at 
/usr/src/sys/kern/vfs_syscalls.c:4142
#22 0x80d0b449 in sys_getdirentries (td=0x81e9a178 
, uap=0xfe00de06c1e8) at /usr/src/sys/kern/vfs_syscalls.c:4089
#23 0x810bd00e in syscallenter (td=) at 
/usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:189
#24 amd64_syscall (td=0xfe00de06be00, traced=0) at 
/usr/src/sys/amd64/amd64/trap.c:1156
#25 
#26 0x0008012a83fa in ?? ()
Backtrace stopped: Cannot access memory at address 0x7fffd928

—
Juraj Lutter
XMPP: juraj (at) lutter.sk
GSM: +421907986576

> On 27 Feb 2021, at 15:18, Juraj Lutter  wrote:
>
> Reliably reproducible:
>

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rdirplus.patch
Description: rdirplus.patch
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Re: -CURRENT panics in NFS

2021-02-27 Thread Juraj Lutter
And a kgdb backtrace:

(kgdb) bt
#0  __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55
#1  doadump (textdump=textdump@entry=0) at /usr/src/sys/kern/kern_shutdown.c:399
#2  0x804c7b2a in db_dump (dummy=, dummy2=, 
dummy3=, dummy4=) at /usr/src/sys/ddb/db_command.c:575
#3  0x804c78ee in db_command (last_cmdp=, 
cmd_table=, dopager=dopager@entry=1) at 
/usr/src/sys/ddb/db_command.c:482
#4  0x804c762d in db_command_loop () at 
/usr/src/sys/ddb/db_command.c:535
#5  0x804cac36 in db_trap (type=, code=) 
at /usr/src/sys/ddb/db_main.c:270
#6  0x80c59d04 in kdb_trap (type=type@entry=3, code=code@entry=0, 
tf=, tf@entry=0xfe00d01c3d40) at 
/usr/src/sys/kern/subr_kdb.c:727
#7  0x810bc1ee in trap (frame=0xfe00d01c3d40) at 
/usr/src/sys/amd64/amd64/trap.c:576
#8  
#9  kdb_enter (why=0x812accc9 "panic", msg=) at 
/usr/src/sys/kern/subr_kdb.c:506
#10 0x80c0d5d2 in vpanic (fmt=, ap=, 
ap@entry=0xfe00d01c3ea0) at /usr/src/sys/kern/kern_shutdown.c:907
#11 0x80c0d363 in panic (fmt=0x81e9a178  
"\177\256&\201\377\377\377\377") at /usr/src/sys/kern/kern_shutdown.c:843
#12 0x80cd6d74 in cache_enter_time (dvp=0xf80079321e00, 
vp=0xf80079321e00, cnp=cnp@entry=0xfe00d01c4030, 
tsp=tsp@entry=0xfe00d01c40e0, dtsp=)
at /usr/src/sys/kern/vfs_cache.c:2274
#13 0x80ae2bd6 in nfsrpc_readdirplus (vp=, 
vp@entry=0xf80079321e00, uiop=, 
uiop@entry=0xfe00d01c4540,
cookiep=cookiep@entry=0xfe00d01c44e0, 
cred=cred@entry=0xf80079307e00, p=, 
p@entry=0xfe00de06be00, nap=nap@entry=0xfe00d01c4400,
attrflagp=0xfe00d01c44f0, eofp=0xfe00d01c44f4, stuff=0x0) at 
/usr/src/sys/fs/nfsclient/nfs_clrpcops.c:3766
#14 0x80aed4ec in ncl_readdirplusrpc (vp=vp@entry=0xf80079321e00, 
uiop=uiop@entry=0xfe00d01c4540, cred=0xf80079307e00, 
td=td@entry=0xfe00de06be00)
at /usr/src/sys/fs/nfsclient/nfs_clvnops.c:2490
#15 0x80afdc93 in ncl_doio (vp=vp@entry=0xf80079321e00, 
bp=bp@entry=0xfe000ee1c610, cr=0xfe00d01c3d00, 
cr@entry=0xf80079307e00, td=td@entry=0xfe00de06be00,
called_from_strategy=called_from_strategy@entry=0) at 
/usr/src/sys/fs/nfsclient/nfs_clbio.c:1686
#16 0x80afce3c in ncl_bioread (vp=, 
vp@entry=0xf80079321e00, uio=, ioflag=ioflag@entry=0, 
cred=)
at /usr/src/sys/fs/nfsclient/nfs_clbio.c:604
#17 0x80af1baf in nfs_readdir (ap=ap@entry=0xfe00d01c4918) at 
/usr/src/sys/fs/nfsclient/nfs_clvnops.c:2383
#18 0x80ce490f in vop_sigdefer (vop=, 
a=0xfe00d01c4918) at /usr/src/sys/kern/vfs_default.c:1471
#19 0x81181f38 in VOP_READDIR_APV (vop=0x81af00d8 
, a=a@entry=0xfe00d01c4918) at vnode_if.c:1939
#20 0x80d0b23b in VOP_READDIR (vp=0xf80079321e00, 
uio=0xfe00d01c48d0, cred=, eofflag=0xfe00d01c48cc, 
ncookies=0x0, cookies=0x0) at ./vnode_if.h:985
#21 kern_getdirentries (td=, fd=, buf=0x801851000 
, count=4096, 
basep=basep@entry=0xfe00d01c49b0,
residp=residp@entry=0x0, bufseg=UIO_USERSPACE) at 
/usr/src/sys/kern/vfs_syscalls.c:4142
#22 0x80d0b449 in sys_getdirentries (td=0x81e9a178 
, uap=0xfe00de06c1e8) at /usr/src/sys/kern/vfs_syscalls.c:4089
#23 0x810bd00e in syscallenter (td=) at 
/usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:189
#24 amd64_syscall (td=0xfe00de06be00, traced=0) at 
/usr/src/sys/amd64/amd64/trap.c:1156
#25 
#26 0x0008012a83fa in ?? ()
Backtrace stopped: Cannot access memory at address 0x7fffd928

—
Juraj Lutter
XMPP: juraj (at) lutter.sk
GSM: +421907986576

> On 27 Feb 2021, at 15:18, Juraj Lutter  wrote:
> 
> Reliably reproducible:
> 

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Re: -CURRENT panics in NFS

2021-02-27 Thread Juraj Lutter
Reliably reproducible:

VNASSERT failed: dvp != vp not true at /usr/src/sys/kern/vfs_cache.c:2269 
(cache_enter_time)
0xf80079321e00: type VDIR
usecount 4, writecount 0, refcount 3 seqc users 0 mountedhere 0
hold count flags ()
flags (VV_ROOT|VV_VMSIZEVNLOCK)
v_object 0xf801eeaf1d68 ref 0 pages 2 cleanbuf 1 dirtybuf 0
lock type nfs: SHARED (count 1)
fileid 34 fsid 0x3a3a00ff02
panic: condition dvp != vp not met at /usr/src/sys/kern/vfs_cache.c:2269 
(cache_enter_time)
cpuid = 1
time = 1614435453
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfe00d01c3e10
vpanic() at vpanic+0x181/frame 0xfe00d01c3e60
panic() at panic+0x43/frame 0xfe00d01c3ec0
cache_enter_time() at cache_enter_time+0x1574/frame 0xfe00d01c3fa0
nfsrpc_readdirplus() at nfsrpc_readdirplus+0xcb6/frame 0xfe00d01c43d0
ncl_readdirplusrpc() at ncl_readdirplusrpc+0xdc/frame 0xfe00d01c4520
ncl_doio() at ncl_doio+0x423/frame 0xfe00d01c45b0
ncl_bioread() at ncl_bioread+0x5cc/frame 0xfe00d01c4740
nfs_readdir() at nfs_readdir+0x18f/frame 0xfe00d01c4850
vop_sigdefer() at vop_sigdefer+0x2f/frame 0xfe00d01c4880
VOP_READDIR_APV() at VOP_READDIR_APV+0x38/frame 0xfe00d01c48a0
kern_getdirentries() at kern_getdirentries+0x1fb/frame 0xfe00d01c4990
sys_getdirentries() at sys_getdirentries+0x29/frame 0xfe00d01c49c0
amd64_syscall() at amd64_syscall+0x12e/frame 0xfe00d01c4af0
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfe00d01c4af0
--- syscall (554, FreeBSD ELF64, sys_getdirentries), rip = 0x8012a83fa, rsp = 
0x7fffd928, rbp = 0x7fffd960 ---
KDB: enter: panic
[ thread pid 1879 tid 101207 ]
Stopped at  kdb_enter+0x37: movq$0,0x128bdde(%rip)
db>


—
Juraj Lutter
XMPP: juraj (at) lutter.sk
GSM: +421907986576

> On 27 Feb 2021, at 15:10, Juraj Lutter  wrote:
> 
> - poudriere data stored on NFS
> - NFS server 12-STABLE
> - NFS client (that panicked) 14-CURRENT
> - Panic string:
> 
> condition dvp != vp not met at /usr/src/sys/kern/vfs_cache.c:2269 
> (cache_enter_time)
> 
> backtrace:
> 
> Tracing pid 27294 tid 100893 td 0xfe00ea1a3500
> kdb_enter() at kdb_enter+0x37/frame 0xfe00ea3dee10
> vpanic() at vpanic+0x1b2/frame 0xfe00ea3dee60
> panic() at panic+0x43/frame 0xfe00ea3deec0
> cache_enter_time() at cache_enter_time+0x1574/frame 0xfe00ea3defa0
> nfsrpc_readdirplus() at nfsrpc_readdirplus+0xcb6/frame 0xfe00ea3df3d0
> ncl_readdirplusrpc() at ncl_readdirplusrpc+0xdc/frame 0xfe00ea3df520
> ncl_doio() at ncl_doio+0x423/frame 0xfe00ea3df5b0
> ncl_bioread() at ncl_bioread+0x5cc/frame 0xfe00ea3df740
> nfs_readdir() at nfs_readdir+0x18f/frame 0xfe00ea3df850
> vop_sigdefer() at vop_sigdefer+0x2f/frame 0xfe00ea3df880
> VOP_READDIR_APV() at VOP_READDIR_APV+0x38/frame 0xfe00ea3df8a0
> kern_getdirentries() at kern_getdirentries+0x1fb/frame 0xfe00ea3df990
> sys_getdirentries() at sys_getdirentries+0x29/frame 0xfe00ea3df9c0
> amd64_syscall() at amd64_syscall+0x12e/frame 0xfe00ea3dfaf0
> fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfe00ea3dfaf0
> 
> 
> running processes:
> 
> 27295 27179 27179 0  S+  piperd  0xf800090b4ba0  xargs
> 27294 27179 27179 0  R+  CPU 1   find
> 27179   816 27179 0  S+  wait0xf80181b69528  sh
> 
> Dump header from device: /dev/vtbd0p3
>  Architecture: amd64
>  Architecture Version: 2
>  Dump Length: 1860571136
>  Blocksize: 512
>  Compression: none
>  Dumptime: 2021-02-27 14:59:59 +0100
>  Hostname: b14.builder.wilbury.net
>  Magic: FreeBSD Kernel Dump
>  Version String: FreeBSD 14.0-CURRENT #0 main-n245107-172f2fc11cc: Fri Feb 26 
> 15:20:00 CET 2021
>r...@b14.builder.wilbury.net:/usr/obj/usr/src/amd64.amd64/sys/GENERIC
>  Panic String: condition dvp != vp not met at 
> /usr/src/sys/kern/vfs_cache.c:2269 (cache_enter_time)
>  Dump Parity: 1481068399
>  Bounds: 0
>  Dump Status: good
> 
> —
> Juraj Lutter
> XMPP: juraj (at) lutter.sk
> GSM: +421907986576
> 
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-CURRENT panics in NFS

2021-02-27 Thread Juraj Lutter
- poudriere data stored on NFS
- NFS server 12-STABLE
- NFS client (that panicked) 14-CURRENT
- Panic string:

condition dvp != vp not met at /usr/src/sys/kern/vfs_cache.c:2269 
(cache_enter_time)

backtrace:

Tracing pid 27294 tid 100893 td 0xfe00ea1a3500
kdb_enter() at kdb_enter+0x37/frame 0xfe00ea3dee10
vpanic() at vpanic+0x1b2/frame 0xfe00ea3dee60
panic() at panic+0x43/frame 0xfe00ea3deec0
cache_enter_time() at cache_enter_time+0x1574/frame 0xfe00ea3defa0
nfsrpc_readdirplus() at nfsrpc_readdirplus+0xcb6/frame 0xfe00ea3df3d0
ncl_readdirplusrpc() at ncl_readdirplusrpc+0xdc/frame 0xfe00ea3df520
ncl_doio() at ncl_doio+0x423/frame 0xfe00ea3df5b0
ncl_bioread() at ncl_bioread+0x5cc/frame 0xfe00ea3df740
nfs_readdir() at nfs_readdir+0x18f/frame 0xfe00ea3df850
vop_sigdefer() at vop_sigdefer+0x2f/frame 0xfe00ea3df880
VOP_READDIR_APV() at VOP_READDIR_APV+0x38/frame 0xfe00ea3df8a0
kern_getdirentries() at kern_getdirentries+0x1fb/frame 0xfe00ea3df990
sys_getdirentries() at sys_getdirentries+0x29/frame 0xfe00ea3df9c0
amd64_syscall() at amd64_syscall+0x12e/frame 0xfe00ea3dfaf0
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfe00ea3dfaf0


running processes:

27295 27179 27179 0  S+  piperd  0xf800090b4ba0  xargs
27294 27179 27179 0  R+  CPU 1   find
27179   816 27179 0  S+  wait0xf80181b69528  sh

Dump header from device: /dev/vtbd0p3
  Architecture: amd64
  Architecture Version: 2
  Dump Length: 1860571136
  Blocksize: 512
  Compression: none
  Dumptime: 2021-02-27 14:59:59 +0100
  Hostname: b14.builder.wilbury.net
  Magic: FreeBSD Kernel Dump
  Version String: FreeBSD 14.0-CURRENT #0 main-n245107-172f2fc11cc: Fri Feb 26 
15:20:00 CET 2021
r...@b14.builder.wilbury.net:/usr/obj/usr/src/amd64.amd64/sys/GENERIC
  Panic String: condition dvp != vp not met at 
/usr/src/sys/kern/vfs_cache.c:2269 (cache_enter_time)
  Dump Parity: 1481068399
  Bounds: 0
  Dump Status: good

—
Juraj Lutter
XMPP: juraj (at) lutter.sk
GSM: +421907986576

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