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Date: Tue, 15 Mar 2005 13:32:42 +0100
From: Martin Zwickel <martin.zwickel@technotrend.de>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: 2.6.11-mm3: BUG: atomic counter underflow at: rpcauth_destroy
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Hi there!

I got some atomic counter underflows in the nfs code:

Mar 14 17:19:15 phoebee rpc.statd[6890]: Received erroneous SM_UNMON request
                                         from phoebee for 192.168.0.1
Mar 14 17:19:15 phoebee BUG: atomic counter underflow at:
Mar 14 17:19:15 phoebee [<c03b51d1>] rpcauth_destroy+0x41/0x50
Mar 14 17:19:15 phoebee [<c03afcac>] rpc_destroy_client+0x9c/0xf0
Mar 14 17:19:15 phoebee [<c03b4698>] rpc_free+0x18/0x40
Mar 14 17:19:15 phoebee [<c03b49ad>] rpc_release_task+0xad/0x120
Mar 14 17:19:15 phoebee [<c03b4563>] __rpc_execute+0x2e3/0x360
Mar 14 17:19:15 phoebee [<c03b1580>] xprt_init_autodisconnect+0x0/0xd0
Mar 14 17:19:15 phoebee [<c012c9e0>] autoremove_wake_function+0x0/0x50
Mar 14 17:19:15 phoebee [<c03af9e7>] rpc_create_client+0x167/0x240
Mar 14 17:19:15 phoebee [<c012c9e0>] autoremove_wake_function+0x0/0x50
Mar 14 17:19:15 phoebee [<c03afefa>] rpc_call_sync+0x5a/0xa0
Mar 14 17:19:15 phoebee [<c0203874>] nsm_mon_unmon+0xb4/0xe0
Mar 14 17:19:15 phoebee [<c0203936>] nsm_unmonitor+0x26/0x70
Mar 14 17:19:15 phoebee [<c02007e8>] nlm_gc_hosts+0x168/0x190
Mar 14 17:19:15 phoebee [<c0200056>] nlm_lookup_host+0x46/0x270
Mar 14 17:19:15 phoebee [<c01fffd1>] nlmclnt_lookup_host+0x11/0x20
Mar 14 17:19:15 phoebee [<c01ff1da>] nlmclnt_proc+0x4a/0x310
Mar 14 17:19:15 phoebee [<c012c9e0>] autoremove_wake_function+0x0/0x50
Mar 14 17:19:15 phoebee [<c034955e>] kernel_sendmsg+0x2e/0x40
Mar 14 17:19:15 phoebee [<c03bb029>] xdr_sendpages+0xc9/0x270
Mar 14 17:19:15 phoebee [<c013a11c>] mempool_free+0x4c/0xa0
Mar 14 17:19:15 phoebee [<c03afd4b>] rpc_release_client+0x4b/0x90
Mar 14 17:19:15 phoebee [<c03b49a6>] rpc_release_task+0xa6/0x120
Mar 14 17:19:15 phoebee [<c03b4563>] __rpc_execute+0x2e3/0x360
Mar 14 17:19:15 phoebee [<c012c9e0>] autoremove_wake_function+0x0/0x50
Mar 14 17:19:15 phoebee [<c012c9e0>] autoremove_wake_function+0x0/0x50
Mar 14 17:19:15 phoebee [<c03aff05>] rpc_call_sync+0x65/0xa0
Mar 14 17:19:15 phoebee [<c01cbe93>] nfs3_rpc_wrapper+0x63/0x70
Mar 14 17:19:15 phoebee [<c01cc113>] nfs3_proc_setattr+0x93/0xd0
Mar 14 17:19:15 phoebee [<c01ca38c>] nfs_scan_commit+0x2c/0x70
Mar 14 17:19:15 phoebee [<c01c3500>] nfs_setattr+0xd0/0x1c0
Mar 14 17:19:15 phoebee [<c013642c>] __filemap_fdatawrite_range+0xbc/0xc0
Mar 14 17:19:15 phoebee [<c01ca38c>] nfs_scan_commit+0x2c/0x70
Mar 14 17:19:15 phoebee [<c01cbc6f>] nfs_commit_inode+0x3f/0xc0
Mar 14 17:19:15 phoebee [<c01cbd44>] nfs_sync_inode+0x54/0x70
Mar 14 17:19:15 phoebee [<c01c1e37>] do_setlk+0x77/0x170
Mar 14 17:19:15 phoebee [<c01c1f30>] nfs_lock+0x0/0x130
Mar 14 17:19:15 phoebee [<c016947b>] fcntl_setlk64+0x25b/0x2b0
Mar 14 17:19:15 phoebee [<c0169e4e>] dput+0x1e/0x250
Mar 14 17:19:15 phoebee [<c0160790>] path_release+0x10/0x60
Mar 14 17:19:15 phoebee [<c01528a9>] sys_chown+0x49/0x50
Mar 14 17:19:15 phoebee [<c0164e74>] sys_fcntl64+0x44/0x90
Mar 14 17:19:15 phoebee [<c0103071>] syscall_call+0x7/0xb
Mar 14 17:19:15 phoebee BUG: atomic counter underflow at:
Mar 14 17:19:15 phoebee [<c03b51d1>] rpcauth_destroy+0x41/0x50
Mar 14 17:19:15 phoebee [<c03afcac>] rpc_destroy_client+0x9c/0xf0
Mar 14 17:19:15 phoebee [<c03b4698>] rpc_free+0x18/0x40
Mar 14 17:19:15 phoebee [<c03b49ad>] rpc_release_task+0xad/0x120
Mar 14 17:19:15 phoebee [<c03b4563>] __rpc_execute+0x2e3/0x360
Mar 14 17:19:15 phoebee [<c03b1580>] xprt_init_autodisconnect+0x0/0xd0
Mar 14 17:19:15 phoebee [<c012c9e0>] autoremove_wake_function+0x0/0x50
Mar 14 17:19:15 phoebee [<c03af9e7>] rpc_create_client+0x167/0x240
Mar 14 17:19:15 phoebee [<c012c9e0>] autoremove_wake_function+0x0/0x50
Mar 14 17:19:15 phoebee [<c03afefa>] rpc_call_sync+0x5a/0xa0
Mar 14 17:19:15 phoebee [<c0203874>] nsm_mon_unmon+0xb4/0xe0
Mar 14 17:19:15 phoebee [<c028118f>] extract_entropy+0x4f/0xa0
Mar 14 17:19:15 phoebee [<c02038c6>] nsm_monitor+0x26/0x70
Mar 14 17:19:15 phoebee [<c01ffa9b>] nlmclnt_lock+0x2b/0xd0
Mar 14 17:19:15 phoebee [<c01ff397>] nlmclnt_proc+0x207/0x310
Mar 14 17:19:15 phoebee [<c012c9e0>] autoremove_wake_function+0x0/0x50
Mar 14 17:19:15 phoebee [<c01c1e37>] do_setlk+0x77/0x170
Mar 14 17:19:15 phoebee [<c01c1f30>] nfs_lock+0x0/0x130
Mar 14 17:19:15 phoebee [<c016947b>] fcntl_setlk64+0x25b/0x2b0
Mar 14 17:19:15 phoebee [<c0169e4e>] dput+0x1e/0x250
Mar 14 17:19:15 phoebee [<c0160790>] path_release+0x10/0x60
Mar 14 17:19:15 phoebee [<c01528a9>] sys_chown+0x49/0x50
Mar 14 17:19:15 phoebee [<c0164e74>] sys_fcntl64+0x44/0x90
Mar 14 17:19:15 phoebee [<c0103071>] syscall_call+0x7/0xb


Regardless of the "erroneous SM_UNMON request", the atomic counter
should not underflow ;)


Regards,
Martin

--=20
MyExcuse:
The kernel license has expired

Martin Zwickel <martin.zwickel@technotrend.de>
Research & Development

TechnoTrend AG <http://www.technotrend.de>

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