Re: kasan inline + CONFIG_DEBUG_TEST_DRIVER_REMOVE kernel panic

CAI Qian
2016-10-10T20:09:51Z

> Is the backtrace the same in that case?
Very close. I saw "intel" there, and here is the list those modules on the system.

# lsmod | grep intel
intel_rapl 20480 0
intel_powerclamp 16384 0
kvm_intel 208896 0
kvm 630784 1 kvm_intel
ghash_clmulni_intel 16384 0
aesni_intel 167936 0
lrw 16384 1 aesni_intel
glue_helper 16384 1 aesni_intel
ablk_helper 16384 1 aesni_intel
cryptd 24576 3 ablk_helper,ghash_clmulni_intel,aesni_intel
crc32c_intel 24576 1

[ 17.884926] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 17.893700] IP: [<ffffffff81546ff7>] device_del+0x17/0x280
[ 17.899848] PGD 0
[ 17.902109] Oops: 0000 [#1] PREEMPT SMP
[ 17.906394] Modules linked in:
[ 17.909823] CPU: 68 PID: 1 Comm: swapper/0 Not tainted 4.8.0-remove-nokasan+ #5
[ 17.917985] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS GRRFSDP1.86B.0271.R00.1510301446 10/30/2015
[ 17.929347] task: ffff8810556c8000 task.stack: ffffc90000078000
[ 17.935955] RIP: 0010:[<ffffffff81546ff7>] [<ffffffff81546ff7>] device_del+0x17/0x280
[ 17.944811] RSP: 0000:ffffc9000007bc00 EFLAGS: 00010286
[ 17.950742] RAX: 0000000000000000 RBX: ffff88085c8e3c00 RCX: 0000000000000001
[ 17.958708] RDX: ffff881059d60000 RSI: 000000000000000b RDI: 0000000000000000
[ 17.966675] RBP: ffffc9000007bc38 R08: 00000000d38c0f63 R09: 0000000000000000
[ 17.974640] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 17.982606] R13: ffff881054099000 R14: 0000000000000001 R15: 0000000000000000
[ 17.990574] FS: 0000000000000000(0000) GS:ffff88105e400000(0000) knlGS:0000000000000000
[ 17.999606] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 18.006022] CR2: 0000000000000000 CR3: 0000000001c06000 CR4: 00000000003406e0
[ 18.013989] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 18.021954] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 18.029919] Stack:
[ 18.032163] 0000000000000000 00000000dd652bd0 ffff88085c8e3c00 ffff88085c8e3c00
[ 18.040475] ffff88085c8e3400 ffff881054099000 0000000000000001 ffffc9000007bc58
[ 18.048788] ffffffff811c9680 ffff88085c8e3c00 ffff88085c8e3400 ffffc9000007bc88
[ 18.057090] Call Trace:
[ 18.059819] [<ffffffff811c9680>] perf_pmu_unregister+0x90/0x150
[ 18.066529] [<ffffffff81017678>] uncore_pci_remove+0xc8/0x160
[ 18.073044] [<ffffffff814428c9>] pci_device_remove+0x39/0xc0
[ 18.079468] [<ffffffff8154bf4e>] driver_probe_device+0xbe/0x4d0
[ 18.086176] [<ffffffff8154c443>] __driver_attach+0xe3/0xf0
[ 18.092399] [<ffffffff8154c360>] ? driver_probe_device+0x4d0/0x4d0
[ 18.099400] [<ffffffff81549b43>] bus_for_each_dev+0x73/0xc0
[ 18.105722] [<ffffffff8154b7de>] driver_attach+0x1e/0x20
[ 18.111752] [<ffffffff8154b290>] bus_add_driver+0x200/0x270
[ 18.118078] [<ffffffff8154d160>] driver_register+0x60/0xe0
[ 18.124303] [<ffffffff81440ee0>] __pci_register_driver+0x60/0x70
[ 18.131117] [<ffffffff81f1e6e1>] intel_uncore_init+0x277/0x2df
[ 18.137728] [<ffffffff81f1e46a>] ? uncore_type_init+0x15f/0x15f
[ 18.144441] [<ffffffff81002190>] do_one_initcall+0x50/0x190
[ 18.150768] [<ffffffff810c5bf1>] ? parse_args+0x2d1/0x490
[ 18.156894] [<ffffffff81f19243>] kernel_init_freeable+0x1ff/0x29e
[ 18.163801] [<ffffffff817dd840>] ? rest_init+0x140/0x140
[ 18.169831] [<ffffffff817dd84e>] kernel_init+0xe/0x100
[ 18.175668] [<ffffffff817e957a>] ret_from_fork+0x2a/0x40
[ 18.181695] Code: e8 cf d4 29 00 5b 5d c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 56 41 55 41 54 53 49 89 fc 48 83 ec 18 <4c> 8b 2f 65 48 8b 04 25 28 00 00 00 48 89 45 d8 31 c0 48 8b 87
[ 18.203631] RIP [<ffffffff81546ff7>] device_del+0x17/0x280
[ 18.209867] RSP <ffffc9000007bc00>
[ 18.213759] CR2: 0000000000000000
[ 18.217548] ---[ end trace 91188545987fc9d9 ]---
[ 18.222706] Kernel panic - not syncing: Fatal exception
[ 18.228692] ---[ end Kernel panic - not syncing: Fatal exception