Public bug reported:
I have a kernel bug when system is runing.
System seem to be work for currently user logged on.
I can't reproduce it, beceause I don't what, the processor is doing when
kernel panic occur
dmesg ouptut :
[ 992.797483] BUG: unable to handle kernel NULL pointer dereference at virtual
address 000000c4
[ 992.797599] printing eip: c01761d2 *pdpt = 0000000001806001 *pde =
0000000000000000
[ 992.797722] Oops: 0000 [#1] SMP
[ 992.797782] Modules linked in: binfmt_misc af_packet ipt_MASQUERADE
iptable_nat ipt_LOG xt_limit ipt_addrtype xt_state xt_tcpudp nf_conntrack_ipv4
xt_conntrack nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_nat nf_conntrack_ftp
nf_conntrack iptable_filter ip_tables x_tables quota_v1 reiserfs ext2 w83781d
hwmon_vid psmouse lp evdev ipv6 button parport_pc parport intel_agp i2c_piix4
agpgart i2c_core shpchp pci_hotplug pcspkr ext3 jbd mbcache sg sr_mod cdrom
sd_mod ata_piix pata_acpi ata_generic floppy libata 8139too uhci_hcd 8139cp mii
scsi_mod usbcore thermal processor fan fbcon tileblit font bitblit softcursor
fuse
[ 992.798580]
[ 992.798620] Pid: 5762, comm: sshd Not tainted (2.6.24-19-server #1)
[ 992.798677] EIP: 0060:[<c01761d2>] EFLAGS: 00210206 CPU: 0
[ 992.798767] EIP is at sys_fadvise64_64+0x42/0x1f0
[ 992.798831] EAX: c040f924 EBX: 00000040 ECX: 000002ea EDX: 00000000
[ 992.798898] ESI: d18fc000 EDI: 00000044 EBP: 00000000 ESP: d6135dfc
[ 992.798962] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 992.799026] Process sshd (pid: 5762, ti=d6134000 task=d18fc000
task.ti=d6134000)
[ 992.799090] Stack: c01763f7 c0177e78 00000001 00000044 80000000 00000007
d597a840 00000000
[ 992.799224] c012617c c040f900 00000001 00000000 001280d2 c0410fcc
00000000 c127b64c
[ 992.799355] d6b66000 00000040 d00e3340 d18fc000 001280d2 00000000
c01782aa 00000044
[ 992.799478] Call Trace:
[ 992.799539] [<c01763f7>] zone_watermark_ok+0x7/0xa0
[ 992.799608] [<c0177e78>] get_page_from_freelist+0xa8/0x430
[ 992.799681] [<c012617c>] kmap_atomic+0x1c/0x30
[ 992.799783] [<c01782aa>] __alloc_pages+0x5a/0x380
[ 992.799855] [<c0187d62>] find_mergeable_anon_vma+0x82/0xc0
[ 992.799957] [<c018a3f7>] anon_vma_prepare+0x57/0xd0
[ 992.800025] [<c0183c74>] handle_mm_fault+0x664/0xb80
[ 992.800087] [<c0180555>] vm_normal_page+0x25/0x90
[ 992.800153] [<c0181ada>] unmap_vmas+0x54a/0x740
[ 992.800250] [<c01959fd>] __slab_free+0x16d/0x2a0
[ 992.800308] [<c021f237>] _atomic_dec_and_lock+0x47/0x70
[ 992.800368] [<c0185eb9>] remove_vma+0x39/0x50
[ 992.800434] [<c0185eb9>] remove_vma+0x39/0x50
[ 992.800501] [<c0331c23>] do_page_fault+0x143/0x900
[ 992.800562] [<c0185eb9>] remove_vma+0x39/0x50
[ 992.800623] [<c0186a50>] do_munmap+0x180/0x1f0
[ 992.800707] [<c0331ae0>] do_page_fault+0x0/0x900
[ 992.800773] [<c03302da>] error_code+0x72/0x78
[ 992.800873] =======================
[ 992.800908] Code: e8 e4 58 02 00 89 c7 b8 f7 ff ff ff 85 ff 74 42 8b 47 0c
bb e3 ff ff ff 8b 40 0c 0f b7 40 6a 25 00 f0 00 00 3d 00 10 00 00 74 1e <8b> af
80 00 00 00 85 ed 74 34 8b 44 24 30 85 c0 78 2c 8b 4d 38
[ 992.801383] EIP: [<c01761d2>] sys_fadvise64_64+0x42/0x1f0 SS:ESP
0068:d6135dfc
[ 992.801891] ---[ end trace 2e8d2cdc6460b8cb ]---
PS : Sorry for my english
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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Kernel bug
https://bugs.launchpad.net/bugs/246934
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