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Date: Fri, 08 Jan 2016 09:05:45 +0800
From: kernel test robot <ying.huang@...ux.intel.com>
TO: Keith Busch <keith.busch@...el.com>
CC: LKML <linux-kernel@...r.kernel.org>
Subject: [lkp] [blk] bf5c2e3e82: BUG kmalloc-512 (Not tainted): Poison
overwritten
FYI, we noticed the below changes on
git://git.infradead.org/users/kbusch/linux-nvme master
commit bf5c2e3e82b9dd957c4aedb6fa4dabf3e7bec8a3 ("blk-mq: dynamic h/w context count")
+-----------------------------------------------+------------+------------+
| | 1fe4f3f9b7 | bf5c2e3e82 |
+-----------------------------------------------+------------+------------+
| boot_successes | 8 | 0 |
| boot_failures | 0 | 6 |
| BUG_kmalloc-#(Not_tainted):Poison_overwritten | 0 | 6 |
| INFO:#-#.First_byte#instead_of | 0 | 6 |
| INFO:Slab#objects=#used=#fp=0x(null)flags= | 0 | 6 |
| INFO:Object#@...set=#fp= | 0 | 6 |
| backtrace:init | 0 | 6 |
| backtrace:kernel_init_freeable | 0 | 6 |
+-----------------------------------------------+------------+------------+
[ 5.397219] brd: module loaded
[ 5.428701] loop: module loaded
[ 7.750179] =============================================================================
[ 7.751886] BUG kmalloc-512 (Not tainted): Poison overwritten
[ 7.752927] -----------------------------------------------------------------------------
[ 7.752927]
[ 7.755116] Disabling lock debugging due to kernel taint
[ 7.756105] INFO: 0xffff88000d0e6760-0xffff88000d0e694f. First byte 0x0 instead of 0x6b
[ 7.757747] INFO: Slab 0xffffea0000343900 objects=19 used=19 fp=0x (null) flags=0x100000000004080
[ 7.759558] INFO: Object 0xffff88000d0e6760 @offset=10080 fp=0xffff88000d0e6418
[ 7.759558]
[ 7.761653] Bytes b4 ffff88000d0e6750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.763451] Object ffff88000d0e6760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.765235] Object ffff88000d0e6770: 21 43 65 87 00 00 00 00 00 00 00 00 00 00 00 00 !Ce.............
[ 7.767018] Object ffff88000d0e6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.768797] Object ffff88000d0e6790: 00 00 00 00 00 00 00 00 21 43 65 87 00 00 00 00 ........!Ce.....
[ 7.770578] Object ffff88000d0e67a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.772366] Object ffff88000d0e67b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.774154] Object ffff88000d0e67c0: 21 43 65 87 00 00 00 00 00 00 00 00 00 00 00 00 !Ce.............
[ 7.775927] Object ffff88000d0e67d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.777709] Object ffff88000d0e67e0: 00 00 00 00 00 00 00 00 21 43 65 87 00 00 00 00 ........!Ce.....
[ 7.779492] Object ffff88000d0e67f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.781271] Object ffff88000d0e6800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.783055] Object ffff88000d0e6810: 21 43 65 87 00 00 00 00 00 00 00 00 00 00 00 00 !Ce.............
[ 7.784834] Object ffff88000d0e6820: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.786623] Object ffff88000d0e6830: 00 00 00 00 00 00 00 00 21 43 65 87 00 00 00 00 ........!Ce.....
[ 7.788405] Object ffff88000d0e6840: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.790187] Object ffff88000d0e6850: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.791963] Object ffff88000d0e6860: 21 43 65 87 00 00 00 00 00 00 00 00 00 00 00 00 !Ce.............
[ 7.793736] Object ffff88000d0e6870: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.795518] Object ffff88000d0e6880: 00 00 00 00 00 00 00 00 21 43 65 87 00 00 00 00 ........!Ce.....
[ 7.797312] Object ffff88000d0e6890: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.799092] Object ffff88000d0e68a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.800859] Object ffff88000d0e68b0: 21 43 65 87 00 00 00 00 00 00 00 00 00 00 00 00 !Ce.............
[ 7.803045] Object ffff88000d0e68c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.804885] Object ffff88000d0e68d0: 00 00 00 00 00 00 00 00 21 43 65 87 00 00 00 00 ........!Ce.....
[ 7.806673] Object ffff88000d0e68e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.808462] Object ffff88000d0e68f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.810247] Object ffff88000d0e6900: 21 43 65 87 00 00 00 00 00 00 00 00 00 00 00 00 !Ce.............
[ 7.812024] Object ffff88000d0e6910: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.813802] Object ffff88000d0e6920: 00 00 00 00 00 00 00 00 21 43 65 87 00 00 00 00 ........!Ce.....
[ 7.815581] Object ffff88000d0e6930: 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.817361] Object ffff88000d0e6940: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 7.819156] Object ffff88000d0e6950: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk.
[ 7.820933] Redzone ffff88000d0e6960: bb bb bb bb bb bb bb bb ........
[ 7.822646] Padding ffff88000d0e6aa0: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ
[ 7.824368] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G B 4.4.0-rc8-00134-gbf5c2e3 #1
[ 7.826099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 7.827832] 0000000000000000 ffff88001209f7f0 ffffffff8150590a ffff880012802b40
[ 7.829658] ffff88001209f820 ffffffff811c0f5f ffff88000d0e6760 000000000000006b
[ 7.831483] ffff880012802b40 ffff88000d0e694f ffff88001209f878 ffffffff811c100a
[ 7.833306] Call Trace:
[ 7.833997] [<ffffffff8150590a>] dump_stack+0x4b/0x63
[ 7.834968] [<ffffffff811c0f5f>] print_trailer+0x127/0x130
[ 7.835986] [<ffffffff811c100a>] check_bytes_and_report+0xa2/0xea
[ 7.837066] [<ffffffff811c1346>] check_object+0x10a/0x1f7
[ 7.838073] [<ffffffff814f3219>] ? efi_partition+0xd0/0x523
[ 7.839092] [<ffffffff811c246b>] alloc_debug_processing+0xdc/0x14b
[ 7.840179] [<ffffffff811c295f>] ___slab_alloc+0x485/0x612
[ 7.841193] [<ffffffff814f3219>] ? efi_partition+0xd0/0x523
[ 7.842225] [<ffffffff810d7381>] ? __lock_is_held+0x3c/0x57
[ 7.843244] [<ffffffff810d7381>] ? __lock_is_held+0x3c/0x57
[ 7.844267] [<ffffffff814f3219>] ? efi_partition+0xd0/0x523
[ 7.845289] [<ffffffff811c2b3b>] __slab_alloc+0x4f/0x83
[ 7.846277] [<ffffffff811c2b3b>] ? __slab_alloc+0x4f/0x83
[ 7.847279] [<ffffffff814f3219>] ? efi_partition+0xd0/0x523
[ 7.848302] [<ffffffff814f3219>] ? efi_partition+0xd0/0x523
[ 7.849324] [<ffffffff811c2e0a>] kmem_cache_alloc_trace+0x88/0x209
[ 7.850414] [<ffffffff814f3219>] efi_partition+0xd0/0x523
[ 7.851422] [<ffffffff8150f86b>] ? vsnprintf+0x89/0x3af
[ 7.852406] [<ffffffff8150fc3e>] ? snprintf+0x36/0x3e
[ 7.853377] [<ffffffff814f243c>] check_partition+0x11c/0x1b2
[ 7.854411] [<ffffffff814f243c>] ? check_partition+0x11c/0x1b2
[ 7.855467] [<ffffffff814f16c8>] rescan_partitions+0x7c/0x252
[ 7.856513] [<ffffffff81c414ca>] ? mutex_unlock+0xe/0x10
[ 7.857509] [<ffffffff81203d3b>] __blkdev_get+0x1c4/0x3dc
[ 7.858513] [<ffffffff81204119>] blkdev_get+0x1c6/0x2fd
[ 7.859501] [<ffffffff814ef24f>] add_disk+0x42d/0x456
[ 7.860470] [<ffffffff812032d8>] ? revalidate_disk+0x78/0x84
[ 7.861503] [<ffffffff815c8acf>] ? vp_get+0x57/0x67
[ 7.862454] [<ffffffff816fd5fb>] virtblk_probe+0x560/0x641
[ 7.863472] [<ffffffff815c57ff>] virtio_dev_probe+0x111/0x187
[ 7.864512] [<ffffffff816d47d6>] driver_probe_device+0xf7/0x250
[ 7.865582] [<ffffffff816d4990>] __driver_attach+0x61/0x83
[ 7.866599] [<ffffffff816d492f>] ? driver_probe_device+0x250/0x250
[ 7.867686] [<ffffffff816d2d77>] bus_for_each_dev+0x6f/0x87
[ 7.868711] [<ffffffff816d4381>] driver_attach+0x1e/0x20
[ 7.869710] [<ffffffff816d3f6e>] bus_add_driver+0xf2/0x1e4
[ 7.880475] [<ffffffff8261c3a8>] ? init_cryptoloop+0x28/0x28
[ 7.881509] [<ffffffff816d54b4>] driver_register+0x8a/0xc6
[ 7.882530] [<ffffffff8261c3a8>] ? init_cryptoloop+0x28/0x28
[ 7.883560] [<ffffffff815c568b>] register_virtio_driver+0x2b/0x2d
[ 7.884637] [<ffffffff8261c402>] init+0x5a/0x87
[ 7.885552] [<ffffffff81000402>] do_one_initcall+0xe7/0x177
[ 7.886580] [<ffffffff825cf0ec>] kernel_init_freeable+0x1c2/0x24a
[ 7.887663] [<ffffffff81c35e49>] ? rest_init+0x140/0x140
[ 7.888658] [<ffffffff81c35e57>] kernel_init+0xe/0xd4
[ 7.889630] [<ffffffff81c4415f>] ret_from_fork+0x3f/0x70
[ 7.890631] [<ffffffff81c35e49>] ? rest_init+0x140/0x140
[ 7.891635] FIX kmalloc-512: Restoring 0xffff88000d0e6760-0xffff88000d0e694f=0x6b
[ 7.891635]
[ 7.893751] FIX kmalloc-512: Marking all objects used
Thanks,
Kernel Test Robot
View attachment "config-4.4.0-rc8-00134-gbf5c2e3" of type "text/plain" (107492 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (11160 bytes)
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