You have been subscribed to a public bug by Jamie Strandboge (jdstrand):
Using the latest (vmlinuz-2.6.24-17-xen 386) kernel, and also but less
frequently with the -19 kernel provided by Hirano at
http://www.il.is.s.u-tokyo.ac.jp/~hiranotaka/ I get this error
frequently, and it does lead to a complete system lock-up (both cpus get
stuck in "CPU Soft lock") I deal with it by detecting it with a regular
script and rebooting the system automatically but it's definitely a big
problem.
I am using hardy with the default xen installation. It is triggered by
something happening with apache2 evidently, and happens irregularly,
possibly as a result of malicious input to apache2?
[18211.970960] kernel tried to execute NX-protected page - exploit attempt?
(uid: 33)
[18211.970974] BUG: unable to handle kernel paging request at virtual address
c1d5dbe0
[18211.970981] printing eip: c1d5dbe0
[18211.970989] 017bb000 -> *pde = 00000001:676f3001
[18211.970993] 017bc000 -> *pme = 00000001:42a7f067
[18211.970997] 00000000 -> *pte = 80000001:67152063
[18211.971004] Oops: 0011 [#1] SMP
[18211.971010] Modules linked in: nf_conntrack_ftp nf_conntrack_ipv4 xt_state
nf_conntrack xt_multiport iptable_filter ip_tables x_tables quota_v1 ipv6 evdev
ext3 jbd mbcache dm_mirror dm_snapshot dm_mod fuse
[18211.971044]
[18211.971049] Pid: 24093, comm: apache2 Not tainted (2.6.24-19-xen #2)
[18211.971054] EIP: 0061:[<c1d5dbe0>] EFLAGS: 00010206 CPU: 0
[18211.971062] EIP is at 0xc1d5dbe0
[18211.971066] EAX: c1d5cca0 EBX: c1d5cca0 ECX: 00000004 EDX: 00000000
[18211.971070] ESI: 0000000c EDI: 40040000 EBP: 00000000 ESP: dfc1de94
[18211.971074] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069
[18211.971079] Process apache2 (pid: 24093, ti=dfc1c000 task=ecb4e330
task.ti=dfc1c000)
[18211.971083] Stack: c01623a5 00000000 c03fe800 dfc1dee0 0000000c 0000000e
dfc1ded0 c0162456
[18211.971100] c1d9fd60 c15bd86c 0000000e 0000000d c01658c8 0000000e
00000000 0000000e
[18211.971116] 00000000 c1bc8ea0 c1e85d00 c1d5cca0 c22951c0 c1bc8120
c1d9f4c0 c1e82f00
[18211.971133] Call Trace:
[18211.971137] [<c01623a5>] free_hot_cold_page+0x195/0x220
[18211.971155] [<c0162456>] __pagevec_free+0x26/0x30
[18211.971163] [<c01658c8>] release_pages+0x68/0x160
[18211.971171] [<c017a5f4>] free_pages_and_swap_cache+0x74/0xa0
[18211.971179] [<c01737b7>] exit_mmap+0xe7/0x100
[18211.971187] [<c0124303>] mmput+0x23/0x80
[18211.971195] [<c0129d95>] do_exit+0x165/0x8b0
[18211.971203] [<c0174250>] do_munmap+0x180/0x1f0
[18211.971210] [<c0183649>] filp_close+0x49/0x80
[18211.971217] [<c012a50a>] do_group_exit+0x2a/0xa0
[18211.971224] [<c0105832>] syscall_call+0x7/0xb
[18211.971232] [<c0320000>] vcc_def_wakeup+0x10/0x60
[18211.971240] =======================
[18211.971243] Code: 00 00 00 c0 02 40 ed 00 d0 65 e9 80 00 00 40 01 00 00 00
ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 c0 13 42 ed 00 e0 65 e9 <00> 20
00 40 01 00 00 00 ff ff ff ff b4 cc d5 c1 00 00 00 00 a0
[18211.971340] EIP: [<c1d5dbe0>] 0xc1d5dbe0 SS:ESP 0069:dfc1de94
[18211.971352] ---[ end trace 627327b2b71cc16d ]---
[18211.971356] Fixing recursive fault but reboot is needed!
** Affects: xen-source (Ubuntu)
Importance: Undecided
Status: New
--
xen kernel crashes in domU NX-protected page
https://bugs.launchpad.net/bugs/236389
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