On 9/20/19, Trond Myklebust <trondmy@xxxxxxxxxxxxxxx> wrote: > On Fri, 2019-09-20 at 14:23 -0400, Nick Bowler wrote: >> Not sure how reproducible this is. Since I've never seen a crash >> like this before it may be a regression compared to, say, Linux 4.19 >> but I am not certain because this particular machine is brand new so >> I don't have experience with older kernels on it... So it actually seems pretty reliably reproducible, 4 attempts to compile Linux on Linux 5.3 and all four crash the same way, although there's definitely some randomness here... On the other hand, I cannot reproduce if I install Linux 5.2 so it does seem like a regression in 5.3. I will see how well bisecting goes... >> [ 796.050025] BUG: kernel NULL pointer dereference, address: >> 0000000000000014 >> [ 796.051280] #PF: supervisor read access in kernel mode >> [ 796.053063] #PF: error_code(0x0000) - not-present page >> [ 796.054636] PGD 0 P4D 0 >> [ 796.055688] Oops: 0000 [#1] PREEMPT SMP >> [ 796.056768] CPU: 2 PID: 190 Comm: kworker/2:2 Tainted: G W >> 5.3.0 #6 >> [ 796.057953] Hardware name: To Be Filled By O.E.M. To Be Filled By >> O.E.M./B450 Gaming-ITX/ac, BIOS P3.30 05/17/2019 >> [ 796.059329] Workqueue: events key_garbage_collector >> [ 796.060623] RIP: 0010:keyring_gc_check_iterator+0x27/0x30 > > That would be the keyring garbage collector, not NFS. > > Cced keyrings@xxxxxxxxxxxxxxx > > >> [ 796.061845] Code: 44 00 00 48 83 e7 fc b8 01 00 00 00 f6 87 80 00 >> 00 00 21 75 19 48 8b 57 58 48 39 16 7c 05 48 85 d2 7f 0b 48 8b 87 a0 >> 00 00 00 <0f> b6 40 14 c3 0f 1f 40 00 48 83 e7 fc e9 27 eb ff ff 0f >> 1f >> 80 00 >> [ 796.064638] RSP: 0018:ffffb40fc0757df8 EFLAGS: 00010282 >> [ 796.066058] RAX: 0000000000000000 RBX: ffffa14338caed80 RCX: >> ffffb40fc0757e40 >> [ 796.067531] RDX: ffffa1433ae85558 RSI: ffffb40fc0757e40 RDI: >> ffffa1433ae85500 >> [ 796.069014] RBP: ffffb40fc0757e40 R08: 0000000000000000 R09: >> 000000000000000f >> [ 796.070513] R10: 8080808080808080 R11: 0000000000000001 R12: >> ffffffffa4cd6180 >> [ 796.072025] R13: ffffa14338caee10 R14: ffffa14338caedf0 R15: >> ffffa1433ffeff00 >> [ 796.073567] FS: 0000000000000000(0000) GS:ffffa14340480000(0000) >> knlGS:0000000000000000 >> [ 796.075171] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> [ 796.076785] CR2: 0000000000000014 CR3: 0000000747ce6000 CR4: >> 00000000003406e0 >> [ 796.078445] Call Trace: >> [ 796.080091] assoc_array_subtree_iterate+0x55/0x100 >> [ 796.081770] keyring_gc+0x3f/0x80 >> [ 796.083447] key_garbage_collector+0x330/0x3d0 >> [ 796.085155] process_one_work+0x1cb/0x320 >> [ 796.086869] worker_thread+0x28/0x3c0 >> [ 796.088603] ? process_one_work+0x320/0x320 >> [ 796.090335] kthread+0x106/0x120 >> [ 796.092053] ? kthread_create_on_node+0x40/0x40 >> [ 796.093810] ret_from_fork+0x1f/0x30 >> [ 796.095569] Modules linked in: sha1_ssse3 sha1_generic cbc cts >> rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace ext4 crc16 mbcache >> jbd2 iwlmvm mac80211 libarc4 amdgpu iwlwifi snd_hda_codec_realtek >> snd_hda_codec_generic kvm_amd gpu_sched kvm snd_hda_codec_hdmi >> drm_kms_helper irqbypass k10temp syscopyarea sysfillrect sysimgblt >> fb_sys_fops video ttm cfg80211 snd_hda_intel snd_hda_codec drm >> snd_hwdep rfkill snd_hda_core backlight snd_pcm evdev snd_timer snd >> soundcore efivarfs dm_crypt hid_generic igb hwmon i2c_algo_bit sr_mod >> cdrom sunrpc dm_mod >> [ 796.104033] CR2: 0000000000000014 >> [ 796.106304] ---[ end trace 695aee10f9202347 ]--- >> [ 796.108585] RIP: 0010:keyring_gc_check_iterator+0x27/0x30 >> [ 796.110894] Code: 44 00 00 48 83 e7 fc b8 01 00 00 00 f6 87 80 00 >> 00 00 21 75 19 48 8b 57 58 48 39 16 7c 05 48 85 d2 7f 0b 48 8b 87 a0 >> 00 00 00 <0f> b6 40 14 c3 0f 1f 40 00 48 83 e7 fc e9 27 eb ff ff 0f >> 1f >> 80 00 >> [ 796.115773] RSP: 0018:ffffb40fc0757df8 EFLAGS: 00010282 >> [ 796.118209] RAX: 0000000000000000 RBX: ffffa14338caed80 RCX: >> ffffb40fc0757e40 >> [ 796.120683] RDX: ffffa1433ae85558 RSI: ffffb40fc0757e40 RDI: >> ffffa1433ae85500 >> [ 796.123176] RBP: ffffb40fc0757e40 R08: 0000000000000000 R09: >> 000000000000000f >> [ 796.125668] R10: 8080808080808080 R11: 0000000000000001 R12: >> ffffffffa4cd6180 >> [ 796.128104] R13: ffffa14338caee10 R14: ffffa14338caedf0 R15: >> ffffa1433ffeff00 >> [ 796.130493] FS: 0000000000000000(0000) GS:ffffa14340480000(0000) >> knlGS:0000000000000000 >> [ 796.132923] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> [ 796.135266] CR2: 0000000000000014 CR3: 0000000747ce6000 CR4: >> 00000000003406e0 >
