my server has been crashing lately. here what i got at the end of its log file.
Feb 22 19:45:27 webserver kernel: [22223.552874] sdc:
Feb 22 19:45:27 webserver kernel: [22223.581891] sdd:
Feb 22 19:45:27 webserver kernel: [22223.613069] BUG: unable to handle kernel NULL pointer dereference at 00000004
Feb 22 19:45:27 webserver kernel: [22223.613119] IP: bio_uncopy_user+0xc3/0x140
Feb 22 19:45:27 webserver kernel: [22223.613142] *pdpt = 000000002dba3001 *pde = 0000000000000000
Feb 22 19:45:27 webserver kernel: [22223.613143]