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Date: Wed, 18 Nov 2015 14:14:18 +0800
From: kernel test robot <ying.huang@...ux.intel.com>
TO: Markus Elfring <elfring@...rs.sourceforge.net>
CC: 0day robot <fengguang.wu@...el.com>
Subject: [lkp] [net] 0581888c8c: BUG: unable to handle kernel NULL pointer
dereference at (null)
FYI, we noticed the below changes on
https://github.com/0day-ci/linux SF-Markus-Elfring/net-scm-Delete-an-unnecessary-check-before-the-function-call-kfree/20151118-004536
commit 0581888c8c2bba0b9a906a38198edb064da95947 ("net-scm: Delete an unnecessary check before the function call "kfree"")
+------------------------------------------+------------+------------+
| | c5a37883f4 | 0581888c8c |
+------------------------------------------+------------+------------+
| boot_successes | 375 | 16 |
| boot_failures | 35 | 7 |
| BUG:unable_to_handle_kernel | 31 | 6 |
| Oops | 31 | 6 |
| RIP:drm_calc_timestamping_constants[drm] | 31 | |
| Kernel_panic-not_syncing:Fatal_exception | 31 | 6 |
| backtrace:drm_fb_helper_initial_config | 31 | |
| backtrace:mgag200_fbdev_init | 31 | |
| backtrace:mgag200_modeset_init | 31 | |
| backtrace:__pci_register_driver | 22 | |
| backtrace:drm_pci_init | 22 | |
| backtrace:mgag200_init | 22 | |
| backtrace:do_init_module | 22 | |
| backtrace:load_module | 22 | |
| backtrace:SyS_finit_module | 22 | |
| backtrace:work_for_cpu_fn | 9 | |
| backtrace:vc_resize | 20 | |
| backtrace:fbcon_init | 20 | |
| backtrace:visual_init | 20 | |
| BUG:kernel_test_crashed | 2 | 1 |
| page_allocation_failure:order:#,mode | 2 | |
| warn_alloc_failed+0x | 2 | |
| Mem-Info | 2 | |
| backtrace:blk_mq_run_work_fn | 1 | |
| backtrace:wb_workfn | 1 | |
| RIP:__scm_send | 0 | 6 |
| backtrace:__sys_sendmsg | 0 | 6 |
| backtrace:SyS_sendmsg | 0 | 6 |
+------------------------------------------+------------+------------+
[ 19.225937] systemd-journald[129]: Compressed data object 889 -> 592
[ 19.254790] systemd-journald[129]: Compressed data object 896 -> 596
[ 19.339352] systemd-journald[129]: systemd-journald running as pid 129
[ 19.369988] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 19.372715] IP: [<ffffffff81780849>] __scm_send+0xd9/0x400
[ 19.380400] PGD 0
[ 19.381544] Oops: 0000 [#1] SMP
[ 19.385130] Modules linked in:
[ 19.386531] CPU: 2 PID: 129 Comm: systemd-journal Not tainted 4.3.0-11482-g0581888 #1
[ 19.400858] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 19.400861] task: ffff88013289a400 ti: ffff88007f7c8000 task.ti: ffff88007f7c8000
[ 19.400870] RIP: 0010:[<ffffffff81780849>] [<ffffffff81780849>] __scm_send+0xd9/0x400
[ 19.400871] RSP: 0018:ffff88007f7cbbf8 EFLAGS: 00010283
[ 19.400873] RAX: ffff88007f7cbd58 RBX: ffff88007f7cbec8 RCX: 0000000000000000
[ 19.400874] RDX: 000000000000001c RSI: 0000000000000030 RDI: 0000000000000000
[ 19.400874] RBP: ffff88007f7cbc60 R08: 0000000000000000 R09: 0000000000000001
[ 19.400875] R10: ffff88007f75e5c0 R11: ffff88013289a400 R12: 0000000000000000
[ 19.400876] R13: ffff88007f7cbcb8 R14: ffff88013a6e1f80 R15: ffff88007f7cbd78
[ 19.400878] FS: 00007fed50157840(0000) GS:ffff88013fd00000(0000) knlGS:0000000000000000
[ 19.400879] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 19.400880] CR2: 0000000000000000 CR3: 000000007f680000 CR4: 00000000000006e0
[ 19.400884] Stack:
[ 19.400887] 0000000000000000 ffff88013289a400 ffff88013289a400 ffff88013289a400
[ 19.400889] ffff88013289a400 ffff880137f64280 ffffffff00000000 ffff880000000075
[ 19.400890] ffff880137f64280 ffff8801328d4380 ffff88007f7cbec8 0000000000000000
[ 19.400891] Call Trace:
[ 19.400900] [<ffffffff81838ea4>] unix_dgram_sendmsg+0x294/0x5d0
[ 19.400906] [<ffffffff811e99e1>] ? rw_copy_check_uvector+0x91/0x130
[ 19.400910] [<ffffffff817703b8>] sock_sendmsg+0x38/0x50
[ 19.400912] [<ffffffff81770f15>] ___sys_sendmsg+0x285/0x290
[ 19.400916] [<ffffffff8116d091>] ? filemap_map_pages+0x221/0x230
[ 19.400919] [<ffffffff8119e3ef>] ? handle_mm_fault+0xedf/0x1940
[ 19.400921] [<ffffffff811a1df3>] ? unmap_region+0xd3/0x100
[ 19.400925] [<ffffffff8109d9d2>] ? __might_sleep+0x52/0xb0
[ 19.400927] [<ffffffff81771612>] __sys_sendmsg+0x42/0x80
[ 19.400929] [<ffffffff81771662>] SyS_sendmsg+0x12/0x20
[ 19.400933] [<ffffffff818c2dee>] entry_SYSCALL_64_fastpath+0x12/0x71
[ 19.400952] Code: 7f 08 01 74 40 49 8b 07 48 8b 53 40 48 83 c0 07 48 83 e0 f8 49 01 c7 48 8b 43 38 49 8d 77 10 48 29 c6 48 39 f2 73 b6 49 8b 7d 08 <66> 83 3f 00 75 0d e8 ec a3 a4 ff 49 c7 45 08 00 00 00 00 31 db
[ 19.400954] RIP [<ffffffff81780849>] __scm_send+0xd9/0x400
[ 19.400954] RSP <ffff88007f7cbbf8>
[ 19.400955] CR2: 0000000000000000
[ 19.400995] ---[ end trace 49b061cf3619cad8 ]---
[ 19.400996] Kernel panic - not syncing: Fatal exception
Thanks,
Ying Huang
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