Re: [ANNOUNCE] v5.14-rc5-rt8

[Mike Galbraith]

On Thu, 2021-08-12 at 15:18 -0500, Clark Williams wrote:
> 
> Sebastian, et al,
> 
> Got the following panic running v5.14-rc5-rt8:
> 
> ...

> Config is attached. 
> 
> I was running the rteval script that kicks off parallel kernel builds
> and hackbench runs as loads and runs cyclictest with a thread on each
> core:
> 
> $ sudo rteval --duration=10m

It took my box more than 10 minutes to explode, but with all those
debug options turned on, it did manage to do so in fairly short order.

Off to build a fixed up 5.13-rt...

[ 2081.451009] page:0000000039d9ce01 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x284580
[ 2081.451015] flags: 0x17fffc00000000(node=0|zone=2|lastcpupid=0x1ffff)
[ 2081.451019] raw: 0017fffc00000000 ffffe1ddcb109a08 ffff8abb8dff5c80 0000000000000000
[ 2081.451021] raw: 0000000000000000 0000000000100000 00000000ffffffff 0000000000000000
[ 2081.451022] page dumped because: VM_BUG_ON_PAGE(!PageSlab(page))
[ 2081.451031] ------------[ cut here ]------------
[ 2081.451032] kernel BUG at ./include/linux/page-flags.h:814!
[ 2081.674089] invalid opcode: 0000 [#1] PREEMPT_RT SMP NOPTI
[ 2081.674093] CPU: 0 PID: 32749 Comm: hackbench Kdump: loaded Tainted: G            E     5.14.0.g607a4143-tip-rt_debug #5
[ 2081.674096] Hardware name: MEDION MS-7848/MS-7848, BIOS M7848W08.20C 09/23/2013
[ 2081.674097] RIP: 0010:___slab_alloc+0x3f5/0x930
[ 2081.674102] Code: 4c 89 f8 0f 85 26 05 00 00 48 8d 65 d0 5b 41 5a 41 5c 41 5d 41 5e 41 5f 5d 49 8d 62 f8 c3 48 c7 c6 90 2e b7 a2 e8 5b d5 f9 ff <0f> 0b 65 8b 05 c2 fe 69 5e 48 98 8b 8d 70 ff ff ff 48 8d 95 78 ff
[ 2081.674104] RSP: 0018:ffff97e8d2247a70 EFLAGS: 00010282
[ 2081.674107] RAX: 0000000000000034 RBX: ffff8ab880045900 RCX: 0000000000000001
[ 2081.674108] RDX: 0000000000000000 RSI: ffffffffa2b9ac2b RDI: 00000000ffffffff
[ 2081.674110] RBP: ffff97e8d2247b40 R08: 0000000000000001 R09: 0000000000000001
[ 2081.674111] R10: ffff97e8d2247a70 R11: 0000000000000034 R12: ffff8abb8dff3130
[ 2081.674112] R13: ffffffffa2c23ac0 R14: 00000000ffffffff R15: 00000000001f3130
[ 2081.674114] FS:  00007f8c2f1c0740(0000) GS:ffff8abb8de00000(0000) knlGS:0000000000000000
[ 2081.674115] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2081.674117] CR2: 00007faca12850a0 CR3: 00000002c4e4c001 CR4: 00000000001706f0
[ 2081.674118] Call Trace:
[ 2081.674122]  ? lock_is_held_type+0xeb/0x140
[ 2081.674127]  ? __alloc_skb+0x8c/0x1b0
[ 2081.674131]  ? lock_release+0x289/0x430
[ 2081.674137]  ? __alloc_skb+0x8c/0x1b0
[ 2081.674138]  ? __alloc_skb+0x8c/0x1b0
[ 2081.674140]  ? __slab_alloc.isra.79+0x45/0x60
[ 2081.674142]  __slab_alloc.isra.79+0x45/0x60
[ 2081.674145]  __kmalloc_node_track_caller+0xca/0x1d0
[ 2081.674149]  kmalloc_reserve+0x2e/0x80
[ 2081.674153]  __alloc_skb+0x8c/0x1b0
[ 2081.674156]  alloc_skb_with_frags+0x53/0x1a0
[ 2081.674160]  ? finish_wait+0x80/0x80
[ 2081.674164]  sock_alloc_send_pskb+0x23b/0x270
[ 2081.674169]  ? wait_for_unix_gc+0x42/0xb0
[ 2081.674175]  unix_stream_sendmsg+0x209/0x3d0
[ 2081.674183]  sock_sendmsg+0x58/0x60
[ 2081.674186]  sock_write_iter+0x9a/0x100
[ 2081.674191]  new_sync_write+0x1a2/0x1c0
[ 2081.674199]  vfs_write+0x3b6/0x410
[ 2081.674204]  ksys_write+0x53/0xe0
[ 2081.674206]  ? lockdep_hardirqs_on+0x54/0x100
[ 2081.674209]  do_syscall_64+0x37/0x80
[ 2081.674214]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 2081.674218] RIP: 0033:0x7f8c2ebd0e93
[ 2081.674221] Code: 75 05 48 83 c4 58 c3 e8 db 3c ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 f3 c3 0f 1f 00 41 54 55 49 89 d4 53 48 89
[ 2081.674223] RSP: 002b:00007ffe616df358 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 2081.674225] RAX: ffffffffffffffda RBX: 00000000000003e8 RCX: 00007f8c2ebd0e93
[ 2081.674226] RDX: 00000000000003e8 RSI: 00007ffe616df360 RDI: 0000000000000013
[ 2081.674227] RBP: 00007ffe616df790 R08: 00007ffe616df2b0 R09: 00007f8c2edd9010
[ 2081.674228] R10: 0000000000000008 R11: 0000000000000246 R12: 00007ffe616df360
[ 2081.674229] R13: 000000000000000b R14: 0000000001f90b30 R15: 0000000000000000
[ 2081.674236] Modules linked in: af_packet(E) nft_fib_inet(E) nft_fib_ipv4(E) nft_fib_ipv6(E) nft_fib(E) nft_reject_inet(E) nft_reject(E) nft_ct(E) nft_chain_nat(E) nf_tables(E) ebtable_nat(E) ebtable_broute(E) ip6table_nat(E) ip6table_mangle(E) ip6table_raw(E) ip6table_security(E) iptable_nat(E) nf_nat(E) nf_conntrack(E) nf_defrag_ipv6(E) nf_defrag_ipv4(E) libcrc32c(E) iptable_mangle(E) iptable_raw(E) iptable_security(E) ip_set(E) bridge(E) nfnetlink(E) stp(E) llc(E) ebtable_filter(E) ebtables(E) iscsi_ibft(E) iscsi_boot_sysfs(E) ip6table_filter(E) ip6_tables(E) rfkill(E) iptable_filter(E) ip_tables(E) x_tables(E) bpfilter(E) nls_iso8859_1(E) nls_cp437(E) joydev(E) hid_logitech_hidpp(E) usblp(E) intel_rapl_msr(E) intel_rapl_common(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) irqbypass(E) crc32_pclmul(E) ghash_clmulni_intel(E) mei_hdcp(E) at24(E) regmap_i2c(E) aesni_intel(E) crypto_simd(E) cryptd(E) iTCO_wdt(E) intel_pmc_bxt(E) iTCO_vendor_support(E)
[ 2081.674279]  snd_hda_codec_realtek(E) snd_hda_codec_generic(E) ledtrig_audio(E) pcspkr(E) r8169(E) realtek(E) snd_hda_codec_hdmi(E) mdio_devres(E) libphy(E) thermal(E) snd_hda_intel(E) snd_intel_dspcfg(E) snd_intel_sdw_acpi(E) snd_hda_codec(E) snd_hda_core(E) snd_hwdep(E) snd_pcm(E) snd_timer(E) mei_me(E) i2c_i801(E) snd(E) lpc_ich(E) mei(E) i2c_smbus(E) intel_smartconnect(E) fan(E) mfd_core(E) soundcore(E) sch_fq_codel(E) nfsd(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) fuse(E) configfs(E) sunrpc(E) hid_logitech_dj(E) ums_realtek(E) uas(E) usb_storage(E) hid_generic(E) usbhid(E) nouveau(E) drm_ttm_helper(E) ttm(E) i2c_algo_bit(E) mxm_wmi(E) wmi(E) drm_kms_helper(E) syscopyarea(E) sysfillrect(E) sysimgblt(E) fb_sys_fops(E) xhci_pci(E) cec(E) xhci_pci_renesas(E) ehci_pci(E) ahci(E) rc_core(E) ehci_hcd(E) libahci(E) xhci_hcd(E) drm(E) libata(E) usbcore(E) video(E) button(E) sd_mod(E) t10_pi(E) vfat(E) fat(E) virtio_blk(E) virtio_mmio(E) ext4(E) crc32c_intel(E) crc16(E) mbcache(E)
[ 2081.674328]  jbd2(E) sg(E) dm_multipath(E) dm_mod(E) scsi_dh_rdac(E) scsi_dh_emc(E) scsi_dh_alua(E) scsi_mod(E) msr(E)
[ 2081.674335] Dumping ftrace buffer:
[ 2081.674340]    (ftrace buffer empty)