FYI, I picked this up again with Ubuntu 20.10 and still see the same
issue.
# lsb_release -d ; uname -srmo
Description: Ubuntu 20.10
Linux 5.8.0-43-generic x86_64 GNU/Linux
Dmesg output:
[Sun Feb 28 11:44:52 2021] NOHZ: local_softirq_pending 08
[Sun Feb 28 11:44:52 2021] NOHZ: local_softirq_pending 08
[Sun Feb 28 12:00:56 2021] INFO: task NetworkManager:1421 blocked for more than
120 seconds.
[Sun Feb 28 12:00:56 2021] Tainted: P W OE 5.8.0-43-generic
#49-Ubuntu
[Sun Feb 28 12:00:56 2021] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[Sun Feb 28 12:00:56 2021] NetworkManager D 0 1421 1 0x00000000
[Sun Feb 28 12:00:56 2021] Call Trace:
[Sun Feb 28 12:00:56 2021] __schedule+0x212/0x5d0
[Sun Feb 28 12:00:56 2021] schedule+0x55/0xc0
[Sun Feb 28 12:00:56 2021] schedule_preempt_disabled+0xe/0x10
[Sun Feb 28 12:00:56 2021] __mutex_lock.constprop.0+0x14a/0x490
[Sun Feb 28 12:00:56 2021] ? netlink_dump+0xc3/0x400
[Sun Feb 28 12:00:56 2021] __mutex_lock_slowpath+0x13/0x20
[Sun Feb 28 12:00:56 2021] mutex_lock+0x34/0x40
[Sun Feb 28 12:00:56 2021] rtnl_lock+0x15/0x20
[Sun Feb 28 12:00:56 2021] nl80211_dump_scan+0x34/0x160 [cfg80211]
[Sun Feb 28 12:00:56 2021] ? __alloc_skb+0xa4/0x200
[Sun Feb 28 12:00:56 2021] netlink_dump+0x18e/0x400
[Sun Feb 28 12:00:56 2021] __netlink_dump_start+0x20e/0x2f0
[Sun Feb 28 12:00:56 2021] genl_family_rcv_msg_dumpit+0x8f/0x110
[Sun Feb 28 12:00:56 2021] ? genl_rcv_msg+0xa0/0xa0
[Sun Feb 28 12:00:56 2021] ? nl80211_dump_survey+0x2e0/0x2e0 [cfg80211]
[Sun Feb 28 12:00:56 2021] ? genl_family_rcv_msg_dumpit+0x110/0x110
[Sun Feb 28 12:00:56 2021] genl_family_rcv_msg+0x1ef/0x290
[Sun Feb 28 12:00:56 2021] ? do_poll.constprop.0+0x287/0x3a0
[Sun Feb 28 12:00:56 2021] ? free_pcp_prepare+0x59/0x110
[Sun Feb 28 12:00:56 2021] ? genl_family_rcv_msg+0x290/0x290
[Sun Feb 28 12:00:56 2021] genl_rcv_msg+0x4c/0xa0
[Sun Feb 28 12:00:56 2021] ? genl_family_rcv_msg+0x290/0x290
[Sun Feb 28 12:00:56 2021] netlink_rcv_skb+0x4e/0x110
[Sun Feb 28 12:00:56 2021] genl_rcv+0x29/0x40
[Sun Feb 28 12:00:56 2021] netlink_unicast+0x218/0x330
[Sun Feb 28 12:00:56 2021] netlink_sendmsg+0x23b/0x460
[Sun Feb 28 12:00:56 2021] ? aa_sk_perm+0x43/0x1b0
[Sun Feb 28 12:00:56 2021] sock_sendmsg+0x65/0x70
[Sun Feb 28 12:00:56 2021] ____sys_sendmsg+0x257/0x2a0
[Sun Feb 28 12:00:56 2021] ? sendmsg_copy_msghdr+0x7e/0xa0
[Sun Feb 28 12:00:56 2021] ? get_order+0x20/0x20
[Sun Feb 28 12:00:56 2021] ___sys_sendmsg+0x82/0xc0
[Sun Feb 28 12:00:56 2021] ? get_order+0x20/0x20
[Sun Feb 28 12:00:56 2021] ? get_order+0x20/0x20
[Sun Feb 28 12:00:56 2021] ? get_order+0x20/0x20
[Sun Feb 28 12:00:56 2021] ? ep_poll+0x2ec/0x480
[Sun Feb 28 12:00:56 2021] ? __fget_light+0x32/0x80
[Sun Feb 28 12:00:56 2021] __sys_sendmsg+0x62/0xb0
[Sun Feb 28 12:00:56 2021] __x64_sys_sendmsg+0x1f/0x30
[Sun Feb 28 12:00:56 2021] do_syscall_64+0x49/0xc0
[Sun Feb 28 12:00:56 2021] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Sun Feb 28 12:00:56 2021] RIP: 0033:0x7fca1587b91d
[Sun Feb 28 12:00:56 2021] Code: Unable to access opcode bytes at RIP
0x7fca1587b8f3.
[Sun Feb 28 12:00:56 2021] RSP: 002b:00007ffcd45b2210 EFLAGS: 00000293
ORIG_RAX: 000000000000002e
[Sun Feb 28 12:00:56 2021] RAX: ffffffffffffffda RBX: 000055abfea2bc40 RCX:
00007fca1587b91d
[Sun Feb 28 12:00:56 2021] RDX: 0000000000000000 RSI: 00007ffcd45b2260 RDI:
000000000000000b
[Sun Feb 28 12:00:56 2021] RBP: 00007ffcd45b2260 R08: 0000000000000000 R09:
000055abfec2d3a0
[Sun Feb 28 12:00:56 2021] R10: 000055abfebc8ba0 R11: 0000000000000293 R12:
000055abfea2bc40
[Sun Feb 28 12:00:56 2021] R13: 000055abfea2bdc0 R14: 00007fca158e2f80 R15:
000055abfea2c340
If I try to run any other networking commands (like ip), they hang.
Here's the NetworkManager callstack:
# cat /proc/1421/stack
[<0>] rtnl_lock+0x15/0x20
[<0>] nl80211_dump_scan+0x34/0x160 [cfg80211]
[<0>] netlink_dump+0x18e/0x400
[<0>] __netlink_dump_start+0x20e/0x2f0
[<0>] genl_family_rcv_msg_dumpit+0x8f/0x110
[<0>] genl_family_rcv_msg+0x1ef/0x290
[<0>] genl_rcv_msg+0x4c/0xa0
[<0>] netlink_rcv_skb+0x4e/0x110
[<0>] genl_rcv+0x29/0x40
[<0>] netlink_unicast+0x218/0x330
[<0>] netlink_sendmsg+0x23b/0x460
[<0>] sock_sendmsg+0x65/0x70
[<0>] ____sys_sendmsg+0x257/0x2a0
[<0>] ___sys_sendmsg+0x82/0xc0
[<0>] __sys_sendmsg+0x62/0xb0
[<0>] __x64_sys_sendmsg+0x1f/0x30
[<0>] do_syscall_64+0x49/0xc0
[<0>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
** Changed in: linux (Ubuntu)
Status: Expired => Incomplete
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https://bugs.launchpad.net/bugs/1878321
Title:
TP-Link UE300 [2357:0601]: Kernel workqueue rtl_work_func_t [r8152]
gets stuck, preventing network connectivity: Bad RIP value
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