On 16. juni 2012 04:32, Andre Tomt wrote:
FWIW; I am (still) seeing this exact same crash several times an hour on
3.4.3-rc1 on Ubuntu 12.04 client. Only that the same second it happens,
all my three displays corrupts badly, becoming completely unreadable.
Switching to console and back usually gets my desktop back on two of
three displays, and sometimes it will need a full xserver restart.
Obviously some memory corruption going on.
One of the crashes also triggered a NX error:
[20292.196332] kernel tried to execute NX-protected page - exploit
attempt? (uid: 0)
And after a while, things start locking up.
It didn't really start happening until a few days ago though, I've been
running 3.4 for since some -rc through all the stable releases. Perhaps
server suddenly got a working idmapper or something? Its a debian
unstable updated a couple times a month.
Booting latest git master now, to see if any of the recent NFS fixes
just pulled by Linus fixes anything (-rc2 had other showstopper nfs
issues).
Just had it happen with 3.5-git as of a couple hours ago (last commit
a2c2df8672f55195f101d9251117aa59e358d296):
Jun 16 19:01:49 slurv kernel: [50823.271618] general protection fault:
0000 [#1] SMP
Jun 16 19:01:49 slurv kernel: [50823.271640] CPU 10
Jun 16 19:01:49 slurv kernel: [50823.271690]
Jun 16 19:01:49 slurv kernel: [50823.271698] Pid: 1678, comm: rpc.idmapd
Not tainted 3.5.0-1-desktop #1 System manufacturer System Product
Name/P6T DELUXE V2
Jun 16 19:01:49 slurv kernel: [50823.271738] RIP:
0010:[<ffffffff81129872>] [<ffffffff81129872>]
__key_instantiate_and_link+0x52/0xcb
Jun 16 19:01:49 slurv kernel: [50823.271767] RSP: 0018:ffff88061941bd38
EFLAGS: 00010246
Jun 16 19:01:49 slurv kernel: [50823.271785] RAX: 6337346330366233 RBX:
ffff880606fb97f0 RCX: 0000000000000000
Jun 16 19:01:49 slurv kernel: [50823.271807] RDX: 0000000000000006 RSI:
ffff88061941be85 RDI: ffff880606fb97f0
Jun 16 19:01:49 slurv kernel: [50823.271829] RBP: ffff88061941bd88 R08:
ffff8802bc9ed380 R09: ffff88061941bdb0
Jun 16 19:01:49 slurv kernel: [50823.271850] R10: 0000000000000000 R11:
0000000000000000 R12: ffff88061aad63c0
Jun 16 19:01:49 slurv kernel: [50823.271872] R13: ffff8802bc9ed380 R14:
0000000000000000 R15: ffff88061941bdb0
Jun 16 19:01:49 slurv kernel: [50823.271894] FS: 00007fd449a7d700(0000)
GS:ffff88063fd40000(0000) knlGS:0000000000000000
Jun 16 19:01:49 slurv kernel: [50823.271919] CS: 0010 DS: 0000 ES: 0000
CR0: 0000000080050033
Jun 16 19:01:49 slurv kernel: [50823.271937] CR2: 00007f8844002028 CR3:
000000061be95000 CR4: 00000000000007e0
Jun 16 19:01:49 slurv kernel: [50823.271959] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Jun 16 19:01:49 slurv kernel: [50823.271980] DR3: 0000000000000000 DR6:
00000000ffff0ff0 DR7: 0000000000000400
Jun 16 19:01:49 slurv kernel: [50823.272003] Process rpc.idmapd (pid:
1678, threadinfo ffff88061941a000, task ffff88061b870000)
Jun 16 19:01:49 slurv kernel: [50823.272028] Stack:
Jun 16 19:01:49 slurv kernel: [50823.272036] ffff88061941bd78
0000000000000006 ffff88061941be85 fffffff01aad63e8
Jun 16 19:01:49 slurv kernel: [50823.272060] ffff880606fb9840
ffff880606fb97f0 ffff88061aad63c0 0000000000000006
Jun 16 19:01:49 slurv kernel: [50823.272083] ffff88061941be85
00007fffe09c4500 ffff88061941bdd8 ffffffff81129943
Jun 16 19:01:49 slurv kernel: [50823.272106] Call Trace:
Jun 16 19:01:49 slurv kernel: [50823.272116] [<ffffffff81129943>]
key_instantiate_and_link+0x58/0x80
Jun 16 19:01:49 slurv kernel: [50823.272145] [<ffffffffa058a906>]
idmap_pipe_downcall+0x154/0x1ad [nfs]
Jun 16 19:01:49 slurv kernel: [50823.272173] [<ffffffffa04aeae2>]
rpc_pipe_write+0x56/0x6f [sunrpc]
Jun 16 19:01:49 slurv kernel: [50823.272195] [<ffffffff810c86ce>]
vfs_write+0xad/0x13d
Jun 16 19:01:49 slurv kernel: [50823.272212] [<ffffffff810c8949>]
sys_write+0x45/0x6c
Jun 16 19:01:49 slurv kernel: [50823.272229] [<ffffffff8130a462>]
system_call_fastpath+0x16/0x1b
Jun 16 19:01:49 slurv kernel: [50823.272258] Code: 48 89 55 b8 48 89 75
c0 e8 16 e4 1d 00 48 8b 43 78 c7 45 cc f0 ff ff ff 48 8b 55 b8 48 8b 75
c0 a8 01 75 4f 48 8b 43 20 48 89 df <ff> 50 18 85 c0 89 45 cc 75 3e 48
8b 43 48 f0 ff 40 44 f0 80 4b
Jun 16 19:01:49 slurv kernel: [50823.272317] RIP [<ffffffff81129872>]
__key_instantiate_and_link+0x52/0xcb
Jun 16 19:01:49 slurv kernel: [50823.272339] RSP <ffff88061941bd38>
Jun 16 19:01:49 slurv kernel: [50823.279199] ---[ end trace
25122b5e9d0b0c76 ]---
It did take a while this time.
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