Public bug reported:
Binary package hint: linux-image-2.6.31-5-generic
Running under VirtualBox 3.0.4, I get a lot of these:
[15022.595893] BUG: Bad page map in process rtorrent pte:00000060 pmd:0476f067
[15022.599826] addr:b79dc002 vm_flags:080000fb anon_vma:(null) mapping:c09b6138
index:22a09
[15022.600950] vma->vm_ops->fault: filemap_fault+0x0/0x340
[15022.601542] vma->vm_file->f_op->mmap: ext4_file_mmap+0x0/0x50
[15022.602088] Pid: 2985, comm: rtorrent Tainted: G B 2.6.31-5-generic
#24-Ubuntu
[15022.602109] Call Trace:
[15022.602138] [<c01c23b9>] print_bad_pte+0x139/0x1f0
[15022.602162] [<c01c5de6>] handle_mm_fault+0x376/0x380
[15022.602188] [<c056dd18>] do_page_fault+0x148/0x380
[15022.602211] [<c056dbd0>] ? do_page_fault+0x0/0x380
[15022.602235] [<c056bc03>] error_code+0x73/0x80
[15022.602260] [<c0310ebf>] ? copy_to_user+0xbf/0x120
[15022.602323] [<c048ba43>] memcpy_toiovec+0x43/0x70
[15022.602348] [<c048c07f>] skb_copy_datagram_iovec+0x3f/0x1d0
[15022.602372] [<c056ba22>] ? _spin_lock_bh+0x12/0x20
[15022.602396] [<c04c42d4>] tcp_recvmsg+0x954/0xb20
[15022.602420] [<c0484653>] sock_common_recvmsg+0x43/0x60
[15022.602444] [<c0482ae0>] sock_recvmsg+0xf0/0x120
[15022.602488] [<c01568b0>] ? autoremove_wake_function+0x0/0x40
[15022.602522] [<c0483053>] sys_recvfrom+0xb3/0x130
[15022.602553] [<c04814ff>] ? sock_poll+0xf/0x20
[15022.602578] [<c02106ba>] ? ep_scan_ready_list+0x13a/0x150
[15022.602603] [<c0483106>] sys_recv+0x36/0x40
[15022.602625] [<c0483f10>] sys_socketcall+0x190/0x270
[15022.602832] [<c015f9f1>] ? do_gettimeofday+0x11/0x40
[15022.602858] [<c010334c>] syscall_call+0x7/0xb
They reliably happen after about an hour's uptime. This VM is only
running rtorrent and a minimal install. The installer appears to have
defaulted to an ext4 filesystem. This was a clean install of Karmic,
which an upgrade to this kernel. All packages are up to date as of now.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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ext4_file_mmap causes "Bad page map"
https://bugs.launchpad.net/bugs/412590
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