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Date: Mon, 21 Nov 2011 17:10:36 +0100 From: Markus Trippelsdorf <markus@...ppelsdorf.de> To: Eric Dumazet <eric.dumazet@...il.com> Cc: "Alex,Shi" <alex.shi@...el.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>, Christoph Lameter <cl@...ux-foundation.org>, Pekka Enberg <penberg@...nel.org>, Matt Mackall <mpm@...enic.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, tj@...nel.org Subject: Re: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413 On 2011.11.21 at 16:48 +0100, Eric Dumazet wrote: > Le lundi 21 novembre 2011 à 16:36 +0100, Markus Trippelsdorf a écrit : > > On 2011.11.21 at 15:16 +0100, Eric Dumazet wrote: > > > Le lundi 21 novembre 2011 à 14:15 +0100, Markus Trippelsdorf a écrit : > > > > > > > I've enabled CONFIG_SLUB_DEBUG_ON and this is what happend: > > > > > > > > > > Thanks > > > > > > Please continue to provide more samples. > > > > > > There is something wrong somewhere, but where exactly, its hard to say. > > > > New sample. This one points to lib/idr.c: > > > > [drm] Initialized drm 1.1.0 20060810 > > [drm] radeon defaulting to kernel modesetting. > > [drm] radeon kernel modesetting enabled. > > radeon 0000:01:05.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18 > > radeon 0000:01:05.0: setting latency timer to 64 > > [drm] initializing kernel modesetting (RS780 0x1002:0x9614 0x1043:0x834D). > > [drm] register mmio base: 0xFBEE0000 > > [drm] register mmio size: 65536 > > ATOM BIOS: 113 > > radeon 0000:01:05.0: VRAM: 128M 0x00000000C0000000 - 0x00000000C7FFFFFF (128M used) > > radeon 0000:01:05.0: GTT: 512M 0x00000000A0000000 - 0x00000000BFFFFFFF > > [drm] Detected VRAM RAM=128M, BAR=128M > > [drm] RAM width 32bits DDR > > [TTM] Zone kernel: Available graphics memory: 4083428 kiB. > > [TTM] Zone dma32: Available graphics memory: 2097152 kiB. > > [TTM] Initializing pool allocator. > > [drm] radeon: 128M of VRAM memory ready > > [drm] radeon: 512M of GTT memory ready. > > [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). > > [drm] Driver supports precise vblank timestamp query. > > [drm] radeon: irq initialized. > > [drm] GART: num cpu pages 131072, num gpu pages 131072 > > [drm] Loading RS780 Microcode > > [drm] PCIE GART of 512M enabled (table at 0x00000000C0040000). > > radeon 0000:01:05.0: WB enabled > > [drm] ring test succeeded in 1 usecs > > [drm] radeon: ib pool ready. > > [drm] ib test succeeded in 0 usecs > > ============================================================================= > > BUG idr_layer_cache: Poison overwritten > > ----------------------------------------------------------------------------- > > Thanks, could you now add "CONFIG_DEBUG_PAGEALLOC=y" in your config as > well ? Sure. This one happend with CONFIG_DEBUG_PAGEALLOC=y: [drm] Initialized radeon 2.11.0 20080528 for 0000:01:05.0 on minor 0 loop: module loaded ahci 0000:00:11.0: version 3.0 ahci 0000:00:11.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22 ahci 0000:00:11.0: AHCI 0001.0100 32 slots 6 ports 3 Gbps 0x3f impl SATA mode ahci 0000:00:11.0: flags: 64bit ncq sntf ilck pm led clo pmp pio slum part ccc scsi0 : ahci scsi1 : ahci ============================================================================= BUG task_struct: Poison overwritten ----------------------------------------------------------------------------- INFO: 0xffff880215c43800-0xffff880215c43803. First byte 0x0 instead of 0x6b INFO: Allocated in copy_process+0xc4/0xf60 age=168 cpu=1 pid=5 __slab_alloc.constprop.70+0x1a4/0x1e0 kmem_cache_alloc+0x126/0x160 copy_process+0xc4/0xf60 do_fork+0x100/0x2b0 kernel_thread+0x6c/0x70 __call_usermodehelper+0x31/0xa0 process_one_work+0x11a/0x430 worker_thread+0x126/0x2d0 kthread+0x87/0x90 kernel_thread_helper+0x4/0x10 INFO: Freed in free_task+0x3e/0x50 age=156 cpu=2 pid=13 __slab_free+0x33/0x2d0 kmem_cache_free+0x104/0x120 free_task+0x3e/0x50 __put_task_struct+0xb0/0x110 delayed_put_task_struct+0x3b/0xa0 __rcu_process_callbacks+0x12a/0x350 rcu_process_callbacks+0x62/0x140 __do_softirq+0xa8/0x200 run_ksoftirqd+0x107/0x210 kthread+0x87/0x90 kernel_thread_helper+0x4/0x10 INFO: Slab 0xffffea0008571000 objects=17 used=17 fp=0x (null) flags=0x4000000000004080 INFO: Object 0xffff880215c432c0 @offset=12992 fp=0xffff880215c41d00 Bytes b4 ffff880215c432b0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZZZZZ Object ffff880215c432c0: 6b 6b 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kkkkkkkkkkkkkkkk Object ffff880215c43640: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43650: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43660: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43670: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43680: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43690: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c436a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c436b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c436c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c436d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c436e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c436f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43700: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43710: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43720: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43730: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43740: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43750: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43760: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43770: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43780: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43790: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c437a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c437b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c437c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c437d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c437e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c437f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43800: 00 00 00 00 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b ....kkkkkkkkkkkk Object ffff880215c43810: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43820: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43830: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43840: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43850: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43860: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43870: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43880: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c43890: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880215c438a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk. Redzone ffff880215c438b0: bb bb bb bb bb bb bb bb ........ Padding ffff880215c439f0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZZZZZ Pid: 5, comm: kworker/u:0 Not tainted 3.2.0-rc2-00274-g6fe4c6d #72 Call Trace: [<ffffffff81101ca8>] ? print_section+0x38/0x40 [<ffffffff811021a3>] print_trailer+0xe3/0x150 [<ffffffff811023a0>] check_bytes_and_report+0xe0/0x100 [<ffffffff81103196>] check_object+0x1c6/0x240 [<ffffffff8106b034>] ? copy_process+0xc4/0xf60 [<ffffffff814c5bb3>] alloc_debug_processing+0x62/0xe4 [<ffffffff814c6461>] __slab_alloc.constprop.70+0x1a4/0x1e0 [<ffffffff8106b034>] ? copy_process+0xc4/0xf60 [<ffffffff814ca12a>] ? schedule+0x3a/0x50 [<ffffffff81104d66>] kmem_cache_alloc+0x126/0x160 [<ffffffff8106b034>] ? copy_process+0xc4/0xf60 [<ffffffff81065f18>] ? enqueue_task_fair+0xf8/0x140 [<ffffffff8106b034>] copy_process+0xc4/0xf60 [<ffffffff8106c000>] do_fork+0x100/0x2b0 [<ffffffff810920fd>] ? sched_clock_local+0x1d/0x90 [<ffffffff81044dec>] kernel_thread+0x6c/0x70 [<ffffffff81084430>] ? proc_cap_handler+0x180/0x180 [<ffffffff814cdd30>] ? gs_change+0xb/0xb [<ffffffff810845a1>] __call_usermodehelper+0x31/0xa0 [<ffffffff810869ba>] process_one_work+0x11a/0x430 [<ffffffff81084570>] ? call_usermodehelper_freeinfo+0x30/0x30 [<ffffffff81087026>] worker_thread+0x126/0x2d0 [<ffffffff81086f00>] ? rescuer_thread+0x1f0/0x1f0 [<ffffffff8108bb87>] kthread+0x87/0x90 [<ffffffff814cdd34>] kernel_thread_helper+0x4/0x10 [<ffffffff8108bb00>] ? kthread_flush_work_fn+0x10/0x10 [<ffffffff814cdd30>] ? gs_change+0xb/0xb FIX task_struct: Restoring 0xffff880215c43800-0xffff880215c43803=0x6b FIX task_struct: Marking all objects used ... debug: unmapping init memory ffffffff8187d000..ffffffff818ea000 Write protecting the kernel read-only data: 8192k debug: unmapping init memory ffff8800014d1000..ffff880001600000 debug: unmapping init memory ffff8800017e0000..ffff880001800000 ... slabinfo -v gives: SLUB: task_struct 10 slabs counted but counter=11 -- Markus -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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