Here is a partial panic transcript from linux-image-2.6.22-3-amd64 (2.6.22-6~bpo40+1) from backports:
Stack: free_hot_cold_page __pagevec_free release_pages free_pages_and_swap_cache exit_mmap mmput do_exit sys_exit_group system_call Code: 48 89 46 08 48 89 75 28 48 89 78 08 48 89 41 50 4a ff 84 2a RIP [<ffffffff80263afe>] free_pages_bulk+0x137/0x1d3 RSP <ffff810125e4348> Fixing recursive fault but reboot is needed
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