linux-kernel - [net] 4f347129ca: kernel_BUG_at_mm/slab

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Date:   Thu, 29 Jun 2017 11:26:54 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     David Windsor <dave@...lcore.net>
Cc:     Kees Cook <keescook@...omium.org>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [net]  4f347129ca: kernel_BUG_at_mm/slab_common.c


FYI, we noticed the following commit:

commit: 4f347129caa154c94addbac804879421514096bf ("net: define usercopy region in struct proto slab cache")
https://git.kernel.org/cgit/linux/kernel/git/kees/linux.git kspp/usercopy-whitelist/latest

in testcase: trinity
with following parameters:

	runtime: 300s

test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/


on test machine: qemu-system-x86_64 -enable-kvm -cpu IvyBridge -m 420M

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+------------------------------------------+------------+------------+
|                                          | 4feb522782 | 4f347129ca |
+------------------------------------------+------------+------------+
| boot_successes                           | 4          | 0          |
| boot_failures                            | 0          | 4          |
| kernel_BUG_at_mm/slab_common.c           | 0          | 4          |
| invalid_opcode:#[##]                     | 0          | 4          |
| Kernel_panic-not_syncing:Fatal_exception | 0          | 4          |
+------------------------------------------+------------+------------+



[   15.661990] kernel BUG at mm/slab_common.c:469!
[   15.677701] invalid opcode: 0000 [#1] SMP
[   15.679177] Modules linked in: sctp(+) dccp_ipv4 dccp
[   15.680867] CPU: 0 PID: 230 Comm: modprobe Not tainted 4.12.0-rc5-00027-g4f34712 #1
[   15.683615] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[   15.686864] task: ffff880019d10000 task.stack: ffffc900003f8000
[   15.688670] RIP: 0010:kmem_cache_create_usercopy+0x200/0x220
[   15.690422] RSP: 0018:ffffc900003fbc40 EFLAGS: 00010217
[   15.692128] RAX: 0000000000000000 RBX: 0000000000002000 RCX: 0000000000000000
[   15.694148] RDX: ffff880019d10000 RSI: 00000000000000ee RDI: ffffffff81ca30c8
[   15.709164] RBP: ffffc900003fbc78 R08: 0000000000000494 R09: fffffffffffffb7c
[   15.711138] R10: ffff880009859700 R11: ffffc900003fbad8 R12: 0000000000000500
[   15.712995] R13: ffffffffa0064438 R14: 0000000000000494 R15: fffffffffffffb7c
[   15.714791] FS:  0000000000000000(0000) GS:ffff88000be00000(0063) knlGS:00000000f7712144
[   15.717308] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   15.718862] CR2: 00000000f7677000 CR3: 0000000000a3a000 CR4: 00000000001406f0
[   15.733766] Call Trace:
[   15.734985]  proto_register+0x4e/0x240
[   15.736278]  sctp_init+0x36b/0x4aa [sctp]
[   15.737611]  ? 0xffffffffa0074000
[   15.738798]  do_one_initcall+0x43/0x170
[   15.740082]  ? __might_sleep+0x4a/0x80
[   15.741347]  ? kmem_cache_alloc_trace+0x163/0x1b0
[   15.742797]  do_init_module+0x5f/0x1f8
[   15.744151]  load_module+0x1562/0x1c30
[   15.745446]  SYSC_init_module+0x16f/0x180
[   15.759765]  ? SYSC_init_module+0x16f/0x180
[   15.761161]  SyS_init_module+0xe/0x10
[   15.762562]  do_fast_syscall_32+0xa9/0x220
[   15.763959]  entry_SYSENTER_compat+0x4c/0x5b
[   15.765287] RIP: 0023:0xf767bdd9
[   15.766513] RSP: 002b:00000000fff8189c EFLAGS: 00000282 ORIG_RAX: 0000000000000080
[   15.782047] RAX: ffffffffffffffda RBX: 00000000f75fe010 RCX: 0000000000079330
[   15.783879] RDX: 00000000080c1d40 RSI: 00000000080c1c70 RDI: 00000000080c1d50
[   15.785708] RBP: 00000000080c1d50 R08: 0000000000000000 R09: 0000000000000000
[   15.787541] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   15.789333] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   15.791239] Code: 45 d0 e8 c4 0a 7f 00 e8 8f 58 05 00 e8 da 3a 04 00 e8 05 8c eb ff 48 8b 45 d0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b <0f> 0b 48 8b 5d c8 41 bc f4 ff ff ff e9 4c ff ff ff 48 c7 c7 58 
[   15.796396] RIP: kmem_cache_create_usercopy+0x200/0x220 RSP: ffffc900003fbc40
[   15.798366] ---[ end trace 8e9ca2d40de489a3 ]---


To reproduce:

        git clone https://github.com/01org/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Kernel Test Robot

View attachment "config-4.12.0-rc5-00027-g4f34712" of type "text/plain" (159327 bytes)

View attachment "job-script" of type "text/plain" (3832 bytes)

Download attachment "dmesg.xz" of type "application/octet-stream" (11516 bytes)