I did not encounter this problem in 3.8.0-18-generic or earlier but I am
encountering it in 3.8.0-19-generic. I have also tried
3.9.0-030900rc7-generic (in an attempt to narrow down an unrelated
problem) and do not encounter this "BUG" message there either.
Below are all of the "BUG" messages I received while running
3.8.0-19-generic.
In case it's relevant, I do not have any swap space configured:
$ free -m
total used free shared buffers cached
Mem: 7868 3091 4777 0 180 1184
-/+ buffers/cache: 1725 6143
Swap: 0 0 0
[ 46.416478] swap_free: Bad swap file entry 200000000000000
[ 46.416492] BUG: Bad page map in process udevd pte:00000002 pmd:20ffeb067
[ 46.416502] addr:00007f31b75fc000 vm_flags:00000070 anon_vma:
(null) mapping:ffff880211d2f788 index:d1
[ 46.416515] vma->vm_ops->fault: filemap_fault+0x0/0x470
[ 46.416527] vma->vm_file->f_op->mmap: ext4_file_mmap+0x0/0x50
[ 46.416535] Pid: 667, comm: udevd Tainted: GF 3.8.0-19-generic
#29-Ubuntu
[ 46.416540] Call Trace:
[ 46.416558] [<ffffffff8115477d>] print_bad_pte+0x1dd/0x250
[ 46.416566] [<ffffffff81156df9>] unmap_page_range+0x529/0x750
[ 46.416574] [<ffffffff811570aa>] unmap_single_vma+0x8a/0x100
[ 46.416582] [<ffffffff81157909>] unmap_vmas+0x49/0x90
[ 46.416590] [<ffffffff8115fcf8>] exit_mmap+0x98/0x170
[ 46.416600] [<ffffffff810559e4>] mmput+0x64/0x100
[ 46.416608] [<ffffffff8105e302>] do_exit+0x242/0x9d0
[ 46.416616] [<ffffffff8119566e>] ? ____fput+0xe/0x10
[ 46.416625] [<ffffffff8107a08c>] ? task_work_run+0xac/0xe0
[ 46.416632] [<ffffffff8105eb0f>] do_group_exit+0x3f/0xa0
[ 46.416639] [<ffffffff8105eb87>] sys_exit_group+0x17/0x20
[ 46.416649] [<ffffffff816d379d>] system_call_fastpath+0x1a/0x1f
[ 46.416654] swap_free: Bad swap file entry 200000004000000
[ 46.416658] BUG: Bad page map in process udevd pte:800000002 pmd:20ffeb067
[ 46.416663] addr:00007f31b75fd000 vm_flags:00000070 anon_vma:
(null) mapping:ffff880211d2f788 index:d2
[ 46.416668] vma->vm_ops->fault: filemap_fault+0x0/0x470
[ 46.416674] vma->vm_file->f_op->mmap: ext4_file_mmap+0x0/0x50
[ 46.416678] Pid: 667, comm: udevd Tainted: GF B 3.8.0-19-generic
#29-Ubuntu
[ 46.416681] Call Trace:
[ 46.416688] [<ffffffff8115477d>] print_bad_pte+0x1dd/0x250
[ 46.416695] [<ffffffff81156df9>] unmap_page_range+0x529/0x750
[ 46.416703] [<ffffffff811570aa>] unmap_single_vma+0x8a/0x100
[ 46.416710] [<ffffffff81157909>] unmap_vmas+0x49/0x90
[ 46.416718] [<ffffffff8115fcf8>] exit_mmap+0x98/0x170
[ 46.416727] [<ffffffff810559e4>] mmput+0x64/0x100
[ 46.416733] [<ffffffff8105e302>] do_exit+0x242/0x9d0
[ 46.416739] [<ffffffff8119566e>] ? ____fput+0xe/0x10
[ 46.416746] [<ffffffff8107a08c>] ? task_work_run+0xac/0xe0
[ 46.416753] [<ffffffff8105eb0f>] do_group_exit+0x3f/0xa0
[ 46.416759] [<ffffffff8105eb87>] sys_exit_group+0x17/0x20
[ 46.416767] [<ffffffff816d379d>] system_call_fastpath+0x1a/0x1f
[ 46.416772] BUG: Bad page map in process udevd pte:00001ee0 pmd:20ffeb067
[ 46.416776] addr:00007f31b75fe000 vm_flags:00000070 anon_vma:
(null) mapping:ffff880211d2f788 index:d3
[ 46.416781] vma->vm_ops->fault: filemap_fault+0x0/0x470
[ 46.416786] vma->vm_file->f_op->mmap: ext4_file_mmap+0x0/0x50
[ 46.416791] Pid: 667, comm: udevd Tainted: GF B 3.8.0-19-generic
#29-Ubuntu
[ 46.416793] Call Trace:
[ 46.416800] [<ffffffff8115477d>] print_bad_pte+0x1dd/0x250
[ 46.416807] [<ffffffff81156df9>] unmap_page_range+0x529/0x750
[ 46.416815] [<ffffffff811570aa>] unmap_single_vma+0x8a/0x100
[ 46.416822] [<ffffffff81157909>] unmap_vmas+0x49/0x90
[ 46.416830] [<ffffffff8115fcf8>] exit_mmap+0x98/0x170
[ 46.416838] [<ffffffff810559e4>] mmput+0x64/0x100
[ 46.416845] [<ffffffff8105e302>] do_exit+0x242/0x9d0
[ 46.416851] [<ffffffff8119566e>] ? ____fput+0xe/0x10
[ 46.416857] [<ffffffff8107a08c>] ? task_work_run+0xac/0xe0
[ 46.416864] [<ffffffff8105eb0f>] do_group_exit+0x3f/0xa0
[ 46.416870] [<ffffffff8105eb87>] sys_exit_group+0x17/0x20
[ 46.416878] [<ffffffff816d379d>] system_call_fastpath+0x1a/0x1f
[ 46.416882] swap_free: Bad swap file entry 400000000000202
[ 46.416886] BUG: Bad page map in process udevd pte:00040404 pmd:20ffeb067
[ 46.416890] addr:00007f31b75ff000 vm_flags:00000070 anon_vma:
(null) mapping:ffff880211d2f788 index:d4
[ 46.416895] vma->vm_ops->fault: filemap_fault+0x0/0x470
[ 46.416900] vma->vm_file->f_op->mmap: ext4_file_mmap+0x0/0x50
[ 46.416904] Pid: 667, comm: udevd Tainted: GF B 3.8.0-19-generic
#29-Ubuntu
[ 46.416907] Call Trace:
[ 46.416913] [<ffffffff8115477d>] print_bad_pte+0x1dd/0x250
[ 46.416920] [<ffffffff81156df9>] unmap_page_range+0x529/0x750
[ 46.416928] [<ffffffff811570aa>] unmap_single_vma+0x8a/0x100
[ 46.416935] [<ffffffff81157909>] unmap_vmas+0x49/0x90
[ 46.416942] [<ffffffff8115fcf8>] exit_mmap+0x98/0x170
[ 46.416951] [<ffffffff810559e4>] mmput+0x64/0x100
[ 46.416957] [<ffffffff8105e302>] do_exit+0x242/0x9d0
[ 46.416963] [<ffffffff8119566e>] ? ____fput+0xe/0x10
[ 46.416970] [<ffffffff8107a08c>] ? task_work_run+0xac/0xe0
[ 46.416976] [<ffffffff8105eb0f>] do_group_exit+0x3f/0xa0
[ 46.416982] [<ffffffff8105eb87>] sys_exit_group+0x17/0x20
[ 46.416990] [<ffffffff816d379d>] system_call_fastpath+0x1a/0x1f
[ 46.426884] BUG: Bad rss-counter state mm:ffff88020c4a3f00 idx:2 val:-3
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https://bugs.launchpad.net/bugs/1168930
Title:
BUG: Bad page map in process udevd pte:00000004 pmd:2215bf067
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