[Devel] BUG with __destroy_inode. dirtied_ub is not NULL

[Denis Kirjanov]

Hi, with the kernel 2.6.32-042stab123.3 we're seeing a following bug:

PID: 126    TASK: ffff880816f2d260  CPU: 1   COMMAND: "kswapd0"
 #0 [ffff880816f33870] machine_kexec at ffffffff8103e3c9
 #1 [ffff880816f338d0] crash_kexec at ffffffff810e42d2
 #2 [ffff880816f339a0] oops_end at ffffffff8154c0a0
 #3 [ffff880816f339d0] die at ffffffff810116bb
 #4 [ffff880816f33a00] do_trap at ffffffff8154b874
 #5 [ffff880816f33a60] do_invalid_op at ffffffff8100ced5
 #6 [ffff880816f33b00] invalid_op at ffffffff8100c15b
    [exception RIP: __destroy_inode+152]
    RIP: ffffffff811d89b8  RSP: ffff880816f33bb0  RFLAGS: 00010206
    RAX: 0000000000000000  RBX: ffff88068f677140  RCX: 0000000000000034
    RDX: 0000000000000007  RSI: ffff88068f6773a0  RDI: ffff88068f677140
    RBP: ffff880816f33bc0   R8: 4038000000000000   R9: f9529a3039c0e807
    R10: ffff88068f6ee8f0  R11: 0000000000000000  R12: ffff880816f33c50
    R13: 000000000000006f  R14: ffffffff82400940  R15: ffff88068f677150
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 #7 [ffff880816f33bc8] destroy_inode at ffffffff811d89e6
 #8 [ffff880816f33be8] dispose_list at ffffffff811d8ef7
 #9 [ffff880816f33c28] shrink_icache_memory at ffffffff811d9257
#10 [ffff880816f33c98] shrink_slab at ffffffff8115f928
#11 [ffff880816f33d08] balance_pgdat at ffffffff81162be8
#12 [ffff880816f33e28] kswapd at ffffffff8116305f
#13 [ffff880816f33ee8] kthread at ffffffff810ab8ae
#14 [ffff880816f33f48] kernel_thread at ffffffff8100c3ca

crash shows that the the dirtied_ub = 0x40000