Re: Linux 4.2-rc1

[Casey Schaufler]

On 7/8/2015 9:32 AM, Shuah Khan wrote:
> On Sun, Jul 5, 2015 at 2:22 PM, Linus Torvalds
> <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>> It's Sunday, two weeks have passed, and the merge window is closed. I
>> just pushed out the tag to the git trees, and tar-balls and patches
>> should be mirroring out too.
>>
>> I thought this release would be one of the biggest ones ever, but it
>> turns out that it will depend on how you count. Just counting pure
>> commits, it is indeed one of the bigger rc1's in recent history, but
>> 3.10-rc1 was almost as big, and then the final 3.10 grew from that
>> more than most. I doubt we'll match the 3.10 release, since we have
>> been getting progressively better at *not* merging tons of stuff after
>> -rc1.
>>
>>
> I am seeing the following NULL pointer dereference on my test system:

Can I get your config file, please? I am particularly interested
in seeing your security settings.

Thank you.

>
> [    3.640599] BUG: unable to handle kernel NULL pointer dereference
> at 0000000000000080
> [    3.640609] IP: [<ffffffff814f1463>] firmware_uevent+0x23/0x80
> [    3.640616] PGD 0
> [    3.640620] Oops: 0000 [#1] SMP
> [    3.640625] Modules linked in: iwlwifi snd_hda_intel snd_hda_codec
> eeepc_wmi asus_wmi sparse_keymap drm_kms_helper snd_hda_core drm
> crct10dif_pclmul snd_hwdep btusb crc32_pclmul btrtl
> ghash_clmulni_intel cfg80211 btbcm snd_pcm btintel bluetooth
> snd_seq_midi snd_seq_midi_event aesni_intel snd_rawmidi aes_x86_64 lrw
> snd_seq dm_multipath gf128mul glue_helper scsi_dh ablk_helper cryptd
> snd_seq_device snd_timer mei_me snd microcode mei serio_raw lpc_ich
> shpchp soundcore i2c_algo_bit video wmi mac_hid parport_pc ppdev lp
> parport autofs4 btrfs xor raid6_pq psmouse r8169 ahci dm_mirror
> libahci mii dm_region_hash dm_log
> [    3.640677] CPU: 6 PID: 362 Comm: systemd-udevd Not tainted 4.2.0-rc1+ #2
> [    3.640681] Hardware name: System76, Inc. Wild Dog
> Performance/H87-PLUS, BIOS 0705 12/05/2013
> [    3.640687] task: ffff8800d82d0000 ti: ffff88040cba0000 task.ti:
> ffff88040cba0000
> [    3.640692] RIP: 0010:[<ffffffff814f1463>]  [<ffffffff814f1463>]
> firmware_uevent+0x23/0x80
> [    3.640699] RSP: 0018:ffff88040cba3c78  EFLAGS: 00010282
> [    3.640703] RAX: 0000000000000000 RBX: ffff8800d80a7000 RCX: 0000000000000000
> [    3.640707] RDX: 0000000000000000 RSI: ffffffff81ae290f RDI: ffff8800d80a7000
> [    3.640710] RBP: ffff88040cba3c88 R08: 0000000000019d80 R09: ffff8800d80a7000
> [    3.640714] R10: 0000000000000022 R11: 0000000000000246 R12: ffff8803f3681408
> [    3.640717] R13: ffff8800d80a7000 R14: ffff8803f3681408 R15: 0000000000000001
> [    3.640721] FS:  00007f3c3e7ba880(0000) GS:ffff88041fb80000(0000)
> knlGS:0000000000000000
> [    3.640726] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [    3.640730] CR2: 0000000000000080 CR3: 00000003f29b3000 CR4: 00000000001407e0
> [    3.640734] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [    3.640738] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [    3.640741] Stack:
> [    3.640744]  ffff8803f3681418 0000000000000000 ffff88040cba3cd8
> ffffffff814dd876
> [    3.640750]  ffff88040cba3dd8 0000000000000920 ffff8803f2c20e80
> ffff88040f1ef960
> [    3.640757]  0000000000000000 ffff8800d80a4000 ffff8800d80a7000
> ffff8803f3681418
> [    3.640763] Call Trace:
> [    3.640769]  [<ffffffff814dd876>] dev_uevent+0xb6/0x290
> [    3.640773]  [<ffffffff814dc6d4>] uevent_show+0x94/0x100
> [    3.640778]  [<ffffffff814dbbe0>] dev_attr_show+0x20/0x50
> [    3.640783]  [<ffffffff8176ffe6>] ? mutex_lock+0x16/0x40
> [    3.640788]  [<ffffffff8124fe4a>] sysfs_kf_seq_show+0xaa/0x120
> [    3.640793]  [<ffffffff8124e6e0>] kernfs_seq_show+0x20/0x30
> [    3.640798]  [<ffffffff811fad4d>] seq_read+0xcd/0x370
> [    3.640803]  [<ffffffff8124ee77>] kernfs_fop_read+0x107/0x160
> [    3.640808]  [<ffffffff811d78b8>] __vfs_read+0x28/0xd0
> [    3.640813]  [<ffffffff81316273>] ? security_file_permission+0xa3/0xc0
> [    3.640817]  [<ffffffff811d7de3>] ? rw_verify_area+0x53/0xf0
> [    3.640821]  [<ffffffff811d7f0a>] vfs_read+0x8a/0x130
> [    3.640825]  [<ffffffff811d8d06>] SyS_read+0x46/0xa0
> [    3.640829]  [<ffffffff81772172>] entry_SYSCALL_64_fastpath+0x16/0x75
> [    3.640833] Code: 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89
> e5 41 54 53 48 8b 87 c0 02 00 00 48 89 f3 49 89 fc 48 c7 c6 0f 29 ae
> 81 48 89 df <48> 8b 90 80 00 00 00 31 c0 e8 5f cf ea ff 85 c0 75 39 8b
> 15 ed
> [    3.640865] RIP  [<ffffffff814f1463>] firmware_uevent+0x23/0x80
> [    3.640871]  RSP <ffff88040cba3c78>
> [    3.640874] CR2: 0000000000000080
> [    3.640878] ---[ end trace 0df1af0431b2ec1a ]---
> [    3.703087] snd_hda_codec_realtek hdaudioC1D0: autoconfig for
> ALC887-VD: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:line
> [    3.703092] snd_hda_codec_realtek hdaudioC1D0:    speaker_outs=0
> (0x0/0x0/0x0/0x0/0x0)
> [    3.703095] snd_hda_codec_realtek hdaudioC1D0:    hp_outs=1
> (0x1b/0x0/0x0/0x0/0x0)
> [    3.703098] snd_hda_codec_realtek hdaudioC1D0:    mono: mono_out=0x0
> [    3.703100] snd_hda_codec_realtek hdaudioC1D0:    dig-out=0x11/0x0
> [    3.703102] snd_hda_codec_realtek hdaudioC1D0:    inputs:
> [    3.703104] snd_hda_codec_realtek hdaudioC1D0:      Front Mic=0x19
> [    3.703106] snd_hda_codec_realtek hdaudioC1D0:      Rear Mic=0x18
> [    3.703108] snd_hda_codec_realtek hdaudioC1D0:      Line=0x1a
>
> I can send config and full dmesg if you would like to see it.
>
> thanks,
> -- Shuah
> --
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