On Wed, 25 Mar 2009 15:40:01 -0400 Trond Myklebust <trond.myklebust@xxxxxxxxxx> wrote: > On Wed, 2009-03-25 at 10:21 +0100, Ondrej Valousek wrote: > > Hi list, > > Just wondering if this rings any bell? Backtrace: > > > > SELinux: initialized (dev 0:1d, type nfs4), uses genfs_contexts > > Unable to handle kernel paging request at ffff8801e09b6000 RIP: > > [<ffffffff80261b9e>] copy_page+0x32/0xe4 > > PGD 1f4a067 PUD 2d52067 PMD 2e57067 PTE 0 > > Oops: 0000 [1] SMP > > last sysfs file: > > /devices/pci0000:00/0000:00:1c.0/0000:04:00.0/0000:05:00.0/irq > > CPU 0 > > Modules linked in: hfsplus loop tun xt_physdev netloop netbk blktap > > blkbk ipt_MASQUERADE iptable_nat ip_nat xt_state ip_conntrack nfnetlink > > ipt_REJECT xt_tcpudp iptable_filter i > > p_tables x_tables bridge ipmi_devintf ipmi_si ipmi_msghandler dell_rbu > > nfsd exportfs autofs4 hidp nfs lockd fscache nfs_acl rfcomm l2cap > > bluetooth rpcsec_gss_krb5 auth_rpcgss de > > s sunrpc ipv6 xfrm_nalgo crypto_api mptctl dm_multipath video sbs > > backlight i2c_ec i2c_core button battery asus_acpi ac parport_pc lp > > parport st joydev sr_mod ide_cd i5000_edac > > edac_mc pcspkr aic7xxx cdrom bnx2 serial_core serio_raw shpchp > > dm_snapshot dm_zero dm_mirror dm_mod mppVhba(U) usb_storage ata_piix > > libata mptsas mptscsih scsi_transport_sas mpt > > base aic79xx scsi_transport_spi megaraid_sas mppUpper(U) sg sd_mod > > scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd > > Pid: 6640, comm: smbd Tainted: G 2.6.18-92.1.17.el5xen #1 > > RIP: e030:[<ffffffff80261b9e>] [<ffffffff80261b9e>] copy_page+0x32/0xe4 > > RSP: e02b:ffff8801e09b59f8 EFLAGS: 00010202 > > RAX: 0000000000000246 RBX: 00007fffdaa61c38 RCX: 0000000000000025 > > RDX: 000000000000e02b RSI: ffff8801e09b5fe8 RDI: ffff880193182540 > > RBP: ffffffff885ba9a0 R08: 00007fffdaa63530 R09: 00007fffdaa62d30 > > R10: 0000000000000004 R11: 00002b0bd27f2135 R12: 0000000000000033 > > R13: ffff880193182000 R14: ffff880193182000 R15: ffff880156642fd5 > > FS: 00002b0bd3a1fb70(0000) GS:ffffffff805af000(0000) knlGS:0000000000000000 > > CS: e033 DS: 0000 ES: 0000 > > Process smbd (pid: 6640, threadinfo ffff8801e09b4000, task ffff880161dc2860) > > Stack: ffff88014f08bec0 ffff8801e09b5aa8 ffff880193182000 > > ffffffff80315001 > > ffff8801e09b5aa8 ffff88014f08bec0 ffffffff885ba9a0 ffff88014f08bec0 > > ffffffff885ba9a0 ffff8801e09b5aa8 > > Call Trace: > > [<ffffffff80315001>] selinux_sb_copy_data+0x23/0x1c5 > > [<ffffffff802d0101>] vfs_kern_mount+0x79/0x11a > > [<ffffffff8858dc70>] :nfs:nfs_do_submount+0xc0/0xdb > > [<ffffffff8858dd92>] :nfs:nfs_follow_mountpoint+0xe3/0x1d9 > > [<ffffffff8031295e>] avc_has_perm+0x43/0x55 > > [<ffffffff8858108e>] :nfs:nfs_access_get_cached+0xab/0xfa > > [<ffffffff80317c28>] selinux_inode_follow_link+0x5f/0x6a > > [<ffffffff8020a79a>] __link_path_walk+0xb71/0xf42 > > [<ffffffff8020eb09>] link_path_walk+0x5c/0xe5 > > [<ffffffff8858c99a>] :nfs:nfs_sync_inode_wait+0x83/0x1db > > [<ffffffff8020cf46>] do_path_lookup+0x270/0x2e8 > > [<ffffffff80212bcc>] getname+0x15b/0x1c1 > > [<ffffffff8022415b>] __user_walk_fd+0x37/0x4c > > [<ffffffff8022905f>] vfs_stat_fd+0x1b/0x4a > > [<ffffffff80223f01>] sys_newstat+0x19/0x31 > > [<ffffffff80260295>] tracesys+0x47/0xb2 > > [<ffffffff802602f5>] tracesys+0xa7/0xb2 > > > > Happens on RHEL-5 with both 2.6.18-92.1.17.el5xen and 2.6.18-128.el5xen > > kernels. Happens occasionally with the first one and frequently with the > > latter one (shipped with RHEL 5.3). > > Just wondering if it is more likely some issue with NFS or SELinux.... > > Many thanks > > Ondrej > > It looks like an issue with the copying of the selinux context string > from the binary NFS mount data. It shouldn't be an issue with recent > kernels, since they don't appear to have the 'Binary mount data: just > copy' case in selinux_sb_copy_data(). > > Have you filed a bugzilla entry for it with Red Hat? > I think there was a similar known problem of this nature and there is a check that should prevent this, but obviously it didn't work. Here was the BZ for the original problem: https://bugzilla.redhat.com/show_bug.cgi?id=219837 Please do file a bug in RH bugzilla so we can track down the cause and try to fix it... Thanks, -- Jeff Layton <jlayton@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
