| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sat, 02 Feb 2008 16:41:26 +0000 From: Adrian McMenamin <adrian@...golddream.dyndns.info> To: linux-sh <linux-sh@...r.kernel.org> Cc: LKML <linux-kernel@...r.kernel.org> Subject: slab cache question I have been having problems with the slab cache (using slub) in my maple bus driver (eg see http://lkml.org/lkml/2008/1/28/74). I have now switched to using SLAB_POISON in kmem_cache_create and instead of fatal oops, I get what follows - could someone tell me the likely causes I should be looking for? [ 433.428976] ============================================================================= [ 433.430826] BUG maple_queue_cache: Poison overwritten [ 433.430826] ----------------------------------------------------------------------------- [ 433.430826] [ 433.430826] INFO: 0x8cacc000-0x8cacc01f. First byte 0xff instead of 0x6b [ 433.430826] INFO: Slab 0x8c29f980 used=0 fp=0x8cacc000 flags=0x40c2 [ 433.430826] INFO: Object 0x8cacc000 @offset=0 fp=0x8cacc420 [ 433.430826] [ 433.430826] Object 0x8cacc000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ���������������� [ 433.430826] Object 0x8cacc010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ���������������� [ 433.430826] Object 0x8cacc020: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk [ 433.430826] Object 0x8cacc030: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk [ 433.430826] Object 0x8cacc040: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk [ 433.430826] Object 0x8cacc050: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk [ 433.430826] Object 0x8cacc060: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk [ 433.430826] Object 0x8cacc070: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk [ 433.430826] Padding 0x8cacc404: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZZZZZ [ 433.430826] Padding 0x8cacc414: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZ [ 433.430826] Stack: (0x8cc19e50 to 0x8cc1a000) [ 433.430826] 9e40: 8c063e0c 8cacc01f 8cacc020 8cacc000 [ 433.430826] 9e60: 8c06403a 000080d0 8cc5f9a0 8c063d80 00000000 8c29f980 8cacc000 8cc79f00 [ 433.430826] 9e80: 8cacc000 0000006b 000003ff 8c064d6a 00000001 8cc79f00 8cacc000 8cc79f70 [ 433.430826] 9ea0: 8c29f980 ffffffff 8c154cc4 8c0117ea 8c064e90 8cc2e290 8cc5f9a0 00000001 [ 433.430826] 9ec0: 8cc79f70 8c064e60 000080d0 00000000 8cc79f70 8c154cc4 00000002 8c064e60 [ 433.430826] 9ee0: 8cb03720 8cb44e00 8c155480 00000000 8c2540ac 00000002 8cc2e200 00000000 [ 433.430826] 9f00: 00000002 00000002 8c029656 00000000 8c018700 fffffffe 8c155300 ffffff0f [ 433.430826] 9f20: 8cc01300 8c25409c 8c0297a4 8c02d800 8c0295a0 8c02d9c0 8c02d260 8cc01308 [ 433.430826] 9f40: 8cc01300 00000000 8cc0e9c0 8c02da60 8cc19f50 8cc19f50 00000000 8cc0e9c0 [ 433.430826] 9f60: 8c02da60 8cc19f50 8cc19f50 8c02d2b6 00000000 fffffffc 8c0135c0 8c029720 [ 433.430826] 9f80: 8cc01300 8c02d260 8c003844 00000000 00000000 00000000 00000000 00000000 [ 433.430826] 9fa0: 00000000 00000000 00000000 00000000 8cc11ed4 8c02d280 00000000 00000000 [ 433.430826] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 8cc19fa0 [ 433.430826] 9fe0: 8c003840 00000000 40000000 00000000 00000000 00000000 00000000 00000000 [ 433.430826] [ 433.430826] Call trace: [ 433.430826] [<8c06403a>] check_object+0xba/0x200 [ 433.430826] [<8c063d80>] check_bytes_and_report+0x0/0xe0 [ 433.430826] [<8c064d6a>] __slab_alloc+0x40a/0x500 [ 433.430826] [<8c154cc4>] maple_alloc_dev+0x44/0xa0 [ 433.430826] [<8c0117ea>] update_curr+0x4a/0xe0 [ 433.430826] [<8c064e90>] kmem_cache_alloc+0x30/0xc0 [ 433.430826] [<8c064e60>] kmem_cache_alloc+0x0/0xc0 [ 433.430826] [<8c154cc4>] maple_alloc_dev+0x44/0xa0 [ 433.430826] [<8c064e60>] kmem_cache_alloc+0x0/0xc0 [ 433.430826] [<8c155480>] maple_dma_handler+0x180/0x2e0 [ 433.430826] [<8c029656>] run_workqueue+0xb6/0x180 [ 433.430826] [<8c018700>] printk+0x0/0x20 [ 433.430826] [<8c155300>] maple_dma_handler+0x0/0x2e0 [ 433.430826] [<8c0297a4>] worker_thread+0x84/0xe0 [ 433.430826] [<8c02d800>] prepare_to_wait+0x0/0xe0 [ 433.430826] [<8c0295a0>] run_workqueue+0x0/0x180 [ 433.430826] [<8c02d9c0>] finish_wait+0x0/0xa0 [ 433.430826] [<8c02d260>] kthread_should_stop+0x0/0x20 [ 433.430826] [<8c02da60>] autoremove_wake_function+0x0/0x40 [ 433.430826] [<8c02da60>] autoremove_wake_function+0x0/0x40 [ 433.430826] [<8c02d2b6>] kthread+0x36/0x80 [ 433.430826] [<8c0135c0>] complete+0x0/0xc0 [ 433.430826] [<8c029720>] worker_thread+0x0/0xe0 [ 433.430826] [<8c02d260>] kthread_should_stop+0x0/0x20 [ 433.430826] [<8c003844>] kernel_thread_helper+0x4/0x20 [ 433.430826] [<8c02d280>] kthread+0x0/0x80 [ 433.430826] [<8c003840>] kernel_thread_helper+0x0/0x20 [ 433.430826] [ 433.430826] FIX maple_queue_cache: Restoring 0x8cacc000-0x8cacc01f=0x6b [ 433.430826] [ 433.430826] FIX maple_queue_cache: Marking all objects used [ 433.474526] Maple bus at (0, 2): Connected function 0x10 [ 433.474865] No maple driver found for this device -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists