Date:	Sun, 27 Dec 2015 23:58:23 +0100
From:	Rolf Eike Beer <eike-kernel@...tec.de>
To:	linux-kernel@...r.kernel.org
Subject: GPF after s2disk since 4.3 (inode_permission+0x1a/0x50)

Hi all,

I see these backtraces whenever I wake up my laptop from s2disk. This has been 
no problem in 4.2.x. All relevant filesystems I have are ext4. I regularly do 
s2ram and have not seen any problems with that.

Any ideas?

Greetings,

Eike

general protection fault: 0000 [#1] PREEMPT SMP 
Modules linked in: hid_generic usbhid uinput cdc_phonet phonet usb_storage 
rfcomm cmac ecb ctr ccm fuse af_packet nf_log_ipv6 xt_pkttype nf_log_ipv4 
nf_log_common xt_LOG xt_limit ip6t_REJECT xt_tcpudp nf_conntrack_ipv6 
nf_defrag_ipv6 ip6table_raw ipt_REJECT iptable_raw xt_CT iptable_filter 
ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast 
nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack 
ip6table_filter ip6_tables x_tables bnep drbg ansi_cprng dm_crypt nls_iso8859_1 
nls_cp437 vfat fat arc4 iwlmvm mac80211 x86_pkg_temp_thermal intel_powerclamp 
coretemp btusb btintel btbcm btrtl bluetooth kvm_intel snd_hda_codec_hdmi 
iwlwifi rtsx_pci_ms snd_hda_codec_via rtsx_pci_sdmmc snd_hda_codec_generic 
iTCO_wdt mmc_core memstick iTCO_vendor_support cfg80211 rfkill rtsx_pci kvm 
snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq snd_timer 
lpc_ich snd_seq_device mfd_core shpchp snd fjes soundcore crct10dif_pclmul 
crc32_pclmul mei_me crc32c_intel mei aesni_intel joydev pcspkr ablk_helper 
cryptd lrw i2c_i801 gf128mul glue_helper aes_x86_64 e1000e ptp serio_raw 
pps_core xhci_pci xhci_hcd wmi tpm_infineon tpm_tis tpm battery ac sg efivarfs 
i915 ehci_pci ehci_hcd drm_kms_helper drm usbcore fb_sys_fops sysimgblt 
sysfillrect usb_common syscopyarea i2c_algo_bit thermal video button pr
ocessor scsi_dh_alua scsi_dh_emc scsi_dh_hp_sw scsi_dh_rdac raid456 
async_raid6_recov async_pq async_xor xor async_memcpy async_tx raid6_pq raid10 
raid1 raid0 md_mod dm_snapshot dm_bufio dm_mirror dm_region_hash dm_log dm_mod
CPU: 7 PID: 12631 Comm: pm-powersave Not tainted 4.3.3-2.gdb72752-default #1
Hardware name: Notebook                         W740SU                          
/W740SU                          , BIOS 4.6.5 07/05/2013
task: ffff8800a8ea4080 ti: ffff880058190000 task.ti: ffff880058190000
RIP: 0010:[<ffffffff811ff27a>]  [<ffffffff811ff27a>] inode_permission+0x1a/0x50
RSP: 0018:ffff880058193db0  EFLAGS: 00010202
RAX: 00d5000000d40000 RBX: ffff8801fafbf080 RCX: 0000000000000005
RDX: 0000000000000004 RSI: 0000000000000002 RDI: ffff88003632bd88
RBP: ffff880058193db0 R08: 0000000000000001 R09: ffff8800c476f02a
R10: 000000008992c6d7 R11: ffff880034f2dd10 R12: 0000000000000001
R13: ffff880058193e4c R14: ffff88003632bd88 R15: 0000000000000000
FS:  00007f06336a3700(0000) GS:ffff88021fbc0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0632ad0790 CR3: 0000000201384000 CR4: 00000000001406e0
Stack:
 ffff880058193e00 ffffffff8163df4f 0000000000000017 0000000000000800
 ffff8800d945e0e0 ffff880034f2dcd8 ffff8801fafbf080 0000000000000017
 0000000000000800 00007ffd01ba5050 ffff880058193e78 ffffffff8163e3f8
Call Trace:
 [<ffffffff8163df4f>] unix_find_other+0x4f/0x1f0
 [<ffffffff8163e3f8>] unix_stream_connect+0xf8/0x470
 [<ffffffff8157f4c9>] SYSC_connect+0xd9/0x110
 [<ffffffff815801ae>] SyS_connect+0xe/0x10
 [<ffffffff81694976>] entry_SYSCALL_64_fastpath+0x16/0x75
DWARF2 unwinder stuck at entry_SYSCALL_64_fastpath+0x16/0x75

Leftover inexact backtrace:

Code: 4c 89 ef e8 59 4f 49 00 e9 74 ff ff ff 0f 1f 40 00 0f 1f 44 00 00 55 40 f6 
c6 02 48 89 e5 75 07 e8 3c ff ff ff 5d c3 48 8b 47 28 <f6> 40 50 01 74 ef 0f b7 
07 89 c2 66 81 e2 00 d0 66 81 fa 00 80 
RIP  [<ffffffff811ff27a>] inode_permission+0x1a/0x50
 RSP <ffff880058193db0>
---[ end trace 634ddee63c66edbb ]---

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