On Mon, 16 Jun 2014, Sasha Levin wrote: > It took some time to hit something here, but I think that the following > is related: This related thing looks like someone did a random memset. The SLUB diagnostic show the object, redzone and padding were overwritten with zeros. > [ 494.710068] ============================================================================= > [ 494.710068] BUG page->ptl (Not tainted): Redzone overwritten > [ 494.710068] ----------------------------------------------------------------------------- > [ 494.710068] > [ 494.710068] INFO: 0xffff8804e4730e58-0xffff8804e4730e5f. First byte 0x0 instead of 0xbb > [ 494.710068] INFO: Slab 0xffffea001391cc00 objects=40 used=40 fp=0x (null) flags=0x56fffff80004080 > [ 494.710068] INFO: Object 0xffff8804e4730e10 @offset=3600 fp=0x (null) > [ 494.710068] > [ 494.710068] Bytes b4 ffff8804e4730e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > [ 494.710068] Object ffff8804e4730e10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > [ 494.710068] Object ffff8804e4730e20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > [ 494.710068] Object ffff8804e4730e30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > [ 494.710068] Object ffff8804e4730e40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > [ 494.710068] Object ffff8804e4730e50: 00 00 00 00 00 00 00 00 ........ > [ 494.710068] Redzone ffff8804e4730e58: 00 00 00 00 00 00 00 00 ........ > [ 494.710068] Padding ffff8804e4730f98: 00 00 00 00 00 00 00 00 ........ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>