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Date: Thu, 30 Apr 2020 11:54:15 +0530
From: Allen <allen.pais@...cle.com>
To: netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...il.com>,
Florian Fainelli <f.fainelli@...il.com>
Subject: Net: [DSA]: dsa-loop kernel panic
Hi,
We ran into a kernel panic with dsa-loop.
Here are the details:
VM: aarch64 kvm running 5.7.0-rc3+
$ modprobe dsa-loop
[ 25.968427] dsa-loop fixed-0:1f: DSA mockup driver: 0x1f
[ 25.978156] libphy: dsa slave smi: probed
[ 25.979230] dsa-loop fixed-0:1f: nonfatal error -95 setting MTU on port 0
[ 25.980974] dsa-loop fixed-0:1f lan1 (uninitialized): PHY
[dsa-0.0:00] driver [Generic PHY] (irq=POLL)
[ 25.983855] dsa-loop fixed-0:1f: nonfatal error -95 setting MTU on port 1
[ 25.985523] dsa-loop fixed-0:1f lan2 (uninitialized): PHY
[dsa-0.0:01] driver [Generic PHY] (irq=POLL)
[ 25.988127] dsa-loop fixed-0:1f: nonfatal error -95 setting MTU on port 2
[ 25.989775] dsa-loop fixed-0:1f lan3 (uninitialized): PHY
[dsa-0.0:02] driver [Generic PHY] (irq=POLL)
[ 25.992651] dsa-loop fixed-0:1f: nonfatal error -95 setting MTU on port 3
[ 25.994472] dsa-loop fixed-0:1f lan4 (uninitialized): PHY
[dsa-0.0:03] driver [Generic PHY] (irq=POLL)
[ 25.997015] DSA: tree 0 setup
[root@...alhost ~]# [ 26.002672] dsa-loop fixed-0:1f lan1: configuring
for phy/gmii link mode
[ 26.008264] dsa-loop fixed-0:1f lan1: Link is Up - 100Mbps/Full -
flow control off
[ 26.010098] IPv6: ADDRCONF(NETDEV_CHANGE): lan1: link becomes ready
[ 26.014539] dsa-loop fixed-0:1f lan3: configuring for phy/gmii link mode
[ 26.021323] dsa-loop fixed-0:1f lan2: configuring for phy/gmii link mode
[ 26.023274] dsa-loop fixed-0:1f lan3: Link is Up - 100Mbps/Full -
flow control off
[ 26.028358] dsa-loop fixed-0:1f lan4: configuring for phy/gmii link mode
[ 26.036157] dsa-loop fixed-0:1f lan2: Link is Up - 100Mbps/Full -
flow control off
[ 26.037875] dsa-loop fixed-0:1f lan4: Link is Up - 100Mbps/Full -
flow control off
[ 26.039858] IPv6: ADDRCONF(NETDEV_CHANGE): lan3: link becomes ready
[ 26.041527] IPv6: ADDRCONF(NETDEV_CHANGE): lan2: link becomes ready
[ 26.043219] IPv6: ADDRCONF(NETDEV_CHANGE): lan4: link becomes ready
$ rmmod dsa-loop
[ 50.688935] Unable to handle kernel read from unreadable memory at
virtual address 0000000000000040
[ 50.690775] Mem abort info:
[ 50.691285] ESR = 0x96000005
[ 50.691831] EC = 0x25: DABT (current EL), IL = 32 bits
[ 50.693061] SET = 0, FnV = 0
[ 50.693799] EA = 0, S1PTW = 0
[ 50.694542] Data abort info:
[ 50.695093] ISV = 0, ISS = 0x00000005
[ 50.695841] CM = 0, WnR = 0
[ 50.696543] user pgtable: 64k pages, 48-bit VAs, pgdp=000000020dde7000
[ 50.697925] [0000000000000040] pgd=000000020bec0003,
pud=000000020bec0003, pmd=0000000212ab0003, pte=0000000000000000
[ 50.700057] Internal error: Oops: 96000005 [#1] SMP
p650M.e7s0s1a0g4e8 ]f rMoomd uslyseslo lgdin@...ocd alinh: osdst a_atlo
oAppr(- 2) 9 ip236t:1_r4:pf06il .te..r
_ t _kReEJrnECelT :Infnt_rerejnaecl t_eirprovr6: iOpotp_sR:E J9E6C0T0
0n0f0_5re j[e#c1t]_ iSpMvP4 xt
onntrack ebtable_nat ebtable_broute ip6table_nat ip6table_mangle
ip6table_security ip6table_raw iptable_nat nf_nat iptable_mangle
iptable_security iptable_raw nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4
ip_set ebtable_filter ebtables rfkill ip6table_filter ip6_tables
iptable_filter vfat fat aes_ce_blk crypto_simd cryptd aes_ce_cipher
crct10dif_ce ghash_ce sha2_ce sha256_arm64 sha1_ce virtio_rng button
qemu_fw_cfg ip_tables xfs libcrc32c virtio_net net_failover
virtio_console failover virtio_scsi virtio_pci
[ 50.715211] CPU: 3 PID: 1559 Comm: rmmod Not tainted 5.7.0-rc3+ #3
[ 50.716620] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0
02/06/2015
[ 50.718185] pstate: 60400005 (nZCv daif +PAN -UAO)
[ 50.719274] pc : __dev_set_rx_mode+0x48/0xa0
[ 50.720252] lr : dev_mc_unsync+0xbc/0xfc
[ 50.721129] sp : ffff800010f6f960
[ 50.721875] x29: ffff800010f6f960 x28: ffff0001c10d5d40
[ 50.723085] x27: 0000000000000000 x26: ffffa039806cfcd0
[ 50.724301] x25: ffffa03980f53000 x24: ffffa03980f53000
[ 50.725488] x23: 0000000000000001 x22: ffffa03980f53000
[ 50.726669] x21: ffffa03980137f1c x20: 0000000000000000
[ 50.727849] x19: ffff0001c11a2000 x18: 0000000000000000
[ 50.729046] x17: 0000000000000000 x16: ffffa0397fd53578
[ 50.730236] x15: 6e04191515120a09 x14: 0000000000000000
[ 50.731451] x13: ffff000000000000 x12: ffffffffffffffff
[ 50.732681] x11: 0000000000000030 x10: 0000000000001bd0
[ 50.733874] x9 : ffff800010f6f6d0 x8 : 0000000000000000
[ 50.735054] x7 : ffffffffffffffff x6 : 000000000000ffff
[ 50.736261] x5 : 0000000000000001 x4 : ffff0001c2e32f00
[ 50.737446] x3 : 0000000000000000 x2 : 0000000000000000
[ 50.738631] x1 : ffff0001c2e3bd00 x0 : 0000000000029820
[ 50.739815] Call trace:
[ 50.740385] __dev_set_rx_mode+0x48/0xa0
[ 50.741267] dev_mc_unsync+0xbc/0xfc
[ 50.742064] dsa_slave_close+0x34/0xb4
[ 50.742905] __dev_close_many+0xbc/0x13c
[ 50.743782] dev_close_many+0xb8/0x184
[ 50.744637] rollback_registered_many+0x160/0x558
[ 50.745691] rollback_registered+0x68/0xac
[ 50.746606] unregister_netdevice_queue+0x9c/0x128
[ 50.747673] unregister_netdev+0x28/0x38
[ 50.748564] dsa_slave_destroy+0x4c/0x74
[ 50.749447] dsa_port_teardown+0xac/0xb8
[ 50.750326] dsa_tree_teardown_switches+0x38/0x9c
[ 50.751372] dsa_unregister_switch+0x104/0x1c0
[ 50.752384] dsa_loop_drv_remove+0x24/0x54 [dsa_loop]
[ 50.753518] mdio_remove+0x2c/0x48
[ 50.754284] device_release_driver_internal+0xfc/0x1ac
[ 50.755428] driver_detach+0x6c/0xdc
[ 50.756244] bus_remove_driver+0x74/0xe8
[ 50.757120] driver_unregister+0x34/0x5c
[ 50.758039] mdio_driver_unregister+0x20/0x2c
[ 50.759026] dsa_loop_exit+0x1c/0xf670 [dsa_loop]
[ 50.760094] __arm64_sys_delete_module+0x18c/0x29c
[ 50.761177] el0_svc_common.constprop.3+0xdc/0x194
[ 50.762288] do_el0_svc+0x84/0xa0
[ 50.763029] el0_sync_handler+0x80/0x9c
[ 50.763888] el0_sync+0x164/0x180
[ 50.764654] Code: b9429275 35000175 3949f660 35000220 (f9402281)
[ 50.766046] ---[ end trace 9e9af4eb8dcf17ac ]---
[ 50.767088] Kernel panic - not syncing: Fatal exception in interrupt
[ 50.768527] SMP: stopping secondary CPUs
[ 50.769431] Kernel Offset: 0x20396f4a0000 from 0xffff800010000000
[ 50.770796] PHYS_OFFSET: 0xffffd52500000000
[ 50.771733] CPU features: 0x080002,20802008
[ 50.772620] Memory Limit: none
[ 50.773260] ---[ end Kernel panic - not syncing: Fatal exception in
interrupt ]---
I haven't had much luck trying to figure what exactly is causing the
panic. Will keep looking, any help here would be great.
Thanks,
- Allen
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