*** This bug is a security vulnerability ***
You have been subscribed to a public security bug by Jamie Strandboge
(jdstrand):
I'm use Ubuntu-Server-8.0.4 LTS (always update). Running NFS server since last
month never crash.
Today try to run Ubuntu-8.04 LTS from Inside VirtualBox 2.0.6 (latest) for
accessing ou nfs-server.
But NFS server on Ubuntu server crach with this error:
Nov 27 09:39:04 tawan kernel: [649225.511665] WARNING: at
/build/buildd/linux-2.6.24/lib/kref.c:33 kref_get()
Nov 27 09:39:04 tawan kernel: [649225.511675] Pid: 5216, comm: nfsd Not tainted
2.6.24-21-server #1
Nov 27 09:39:04 tawan kernel: [649225.511696] [nfs:kref_get+0x3d/0xf80]
kref_get+0x3d/0x40
Nov 27 09:39:04 tawan kernel: [649225.511711] [<f8b6658f>]
sunrpc_cache_lookup+0x4f/0x120 [sunrpc]
Nov 27 09:39:04 tawan kernel: [649225.511742] [<f8bc5588>]
svc_export_lookup+0x28/0x30 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.511762] [<f8bc55b3>]
exp_get_by_name+0x23/0x60 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.511780] [<f8b6658f>]
sunrpc_cache_lookup+0x4f/0x120 [sunrpc]
Nov 27 09:39:04 tawan kernel: [649225.511803] [<f8b65428>]
cache_check+0x38/0x400 [sunrpc]
Nov 27 09:39:04 tawan kernel: [649225.511832] [<f8bc57ed>]
exp_find_key+0x6d/0xf0 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.511854] [__switch_to+0x9e/0x150]
__switch_to+0x9e/0x150
Nov 27 09:39:04 tawan kernel: [649225.511867] [<f8bc58ac>] exp_find+0x3c/0x80
[nfsd]
Nov 27 09:39:04 tawan kernel: [649225.511889] [<f8bc592a>]
rqst_exp_find+0x3a/0xd0 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.511911] [<f8bc6162>]
exp_pseudoroot+0x32/0xc0 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.511928] [<f8bd21ab>]
nfsd4_decode_compound+0x78b/0x1140 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.511951] [<f8bce280>]
nfsd4_putrootfh+0x0/0x30 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.511969] [<f8bce1c2>]
nfsd4_proc_compound+0x272/0x2c0 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.511986] [<f8b65428>]
cache_check+0x38/0x400 [sunrpc]
Nov 27 09:39:04 tawan kernel: [649225.512014] [<f8bbe23e>]
nfsd_dispatch+0x9e/0x220 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.512035] [<f8b61e3b>]
svcauth_unix_set_client+0x10b/0x180 [sunrpc]
Nov 27 09:39:04 tawan kernel: [649225.512061] [<f8bbe1a0>]
nfsd_dispatch+0x0/0x220 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.512082] [<f8b5e13d>]
svc_process+0x43d/0x790 [sunrpc]
Nov 27 09:39:04 tawan kernel: [649225.512105] [<f8b614c5>]
svc_recv+0x285/0x430 [sunrpc]
Nov 27 09:39:04 tawan kernel: [649225.512131] [common_interrupt+0x23/0x28]
common_interrupt+0x23/0x28
Nov 27 09:39:04 tawan kernel: [649225.512146] [<f8bbe8e2>] nfsd+0x172/0x2a0
[nfsd]
Nov 27 09:39:04 tawan kernel: [649225.512165] [<f8bbe770>] nfsd+0x0/0x2a0
[nfsd]
Nov 27 09:39:04 tawan kernel: [649225.512184] [kernel_thread_helper+0x7/0x10]
kernel_thread_helper+0x7/0x10
Nov 27 09:39:04 tawan kernel: [649225.512194] =======================
Nov 27 09:39:04 tawan kernel: [649225.567662] WARNING: at
/build/buildd/linux-2.6.24/lib/kref.c:33 kref_get()
Nov 27 09:39:04 tawan kernel: [649225.567669] Pid: 5211, comm: nfsd Not tainted
2.6.24-21-server #1
Nov 27 09:39:04 tawan kernel: [649225.567680] [nfs:kref_get+0x3d/0xf80]
kref_get+0x3d/0x40
Nov 27 09:39:04 tawan kernel: [649225.567694] [<f8bc0d25>]
fh_compose+0x165/0x4e0 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.567713] [__switch_to+0x9e/0x150]
__switch_to+0x9e/0x150
Nov 27 09:39:04 tawan kernel: [649225.567730] [<f8bc6183>]
exp_pseudoroot+0x53/0xc0 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.567751] [<f8bce280>]
nfsd4_putrootfh+0x0/0x30 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.567770] [<f8bce1c2>]
nfsd4_proc_compound+0x272/0x2c0 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.567789] [<f8b65428>]
cache_check+0x38/0x400 [sunrpc]
Nov 27 09:39:04 tawan kernel: [649225.567821] [<f8bbe23e>]
nfsd_dispatch+0x9e/0x220 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.567841] [<f8b61e3b>]
svcauth_unix_set_client+0x10b/0x180 [sunrpc]
Nov 27 09:39:04 tawan kernel: [649225.567867] [<f8bbe1a0>]
nfsd_dispatch+0x0/0x220 [nfsd]
Nov 27 09:39:04 tawan kernel: [649225.567887] [<f8b5e13d>]
svc_process+0x43d/0x790 [sunrpc]
Nov 27 09:39:04 tawan kernel: [649225.567912] [<f8b614c5>]
svc_recv+0x285/0x430 [sunrpc]
Nov 27 09:39:04 tawan kernel: [649225.567942] [<f8bbe8e2>] nfsd+0x172/0x2a0
[nfsd]
Nov 27 09:39:04 tawan kernel: [649225.567962] [<f8bbe770>] nfsd+0x0/0x2a0
[nfsd]
Nov 27 09:39:04 tawan kernel: [649225.567980] [kernel_thread_helper+0x7/0x10]
kernel_thread_helper+0x7/0x10
Nov 27 09:39:04 tawan kernel: [649225.567990] =======================
Always happen if ubuntu client (inside virtualbox) accessing nfsd on
ubuntu server.
** Affects: nfs-utils (Ubuntu)
Importance: Undecided
Status: New
--
NFS Server crash if VirtualBox client accessing
https://bugs.launchpad.net/bugs/302686
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