On Thu, Mar 14, 2013 at 8:07 PM, Toralf Förster <toralf.foerster@xxxxxx> wrote: > The following WARNING: can be triggered sometimes with trinity [1] under a user mode linux image > using the SLUB allocator (and not with SLAB) > > > 2013-03-14T19:09:51.071+01:00 trinity kernel: ------------[ cut here ]------------ > 2013-03-14T19:09:51.071+01:00 trinity kernel: WARNING: at mm/page_alloc.c:2386 __alloc_pages_nodemask+0x153/0x750() > 2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd14: [<08342dd8>] dump_stack+0x22/0x24 > 2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd2c: [<0807d0da>] warn_slowpath_common+0x5a/0x80 > 2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd54: [<0807d1a3>] warn_slowpath_null+0x23/0x30 > 2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fd64: [<080d3213>] __alloc_pages_nodemask+0x153/0x750 > 2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fdf0: [<080d3838>] __get_free_pages+0x28/0x50 > 2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe08: [<080fc48f>] __kmalloc_track_caller+0x3f/0x180 > 2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe30: [<080dec76>] memdup_user+0x26/0x70 > 2013-03-14T19:09:51.071+01:00 trinity kernel: 3899fe4c: [<080dee7e>] strndup_user+0x3e/0x60 > 2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fe68: [<0811b440>] copy_mount_string+0x30/0x50 > 2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fe7c: [<0811be0a>] sys_mount+0x1a/0xe0 > 2013-03-14T19:09:51.076+01:00 trinity kernel: 3899feac: [<08062a92>] handle_syscall+0x82/0xb0 > 2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fef4: [<08074e7d>] userspace+0x46d/0x590 > 2013-03-14T19:09:51.076+01:00 trinity kernel: 3899ffec: [<0805f7cc>] fork_handler+0x6c/0x70 > 2013-03-14T19:09:51.076+01:00 trinity kernel: 3899fffc: [<5a5a5a5a>] 0x5a5a5a5a > 2013-03-14T19:09:51.076+01:00 trinity kernel: > 2013-03-14T19:09:51.076+01:00 trinity kernel: ---[ end trace fd6f346f805efdbe ]--- Looks like strndup_user() triggers the issue. In another trace also strndup_user() appeared. -- Thanks, //richard -- 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