================================================
WARNING: lock held when returning to user space!
syzkaller #0 Not tainted
------------------------------------------------
dhcpcd/5799 is leaving the kernel with locks still held!
1 lock held by dhcpcd/5799:
 #0: ffffffff8e75e620 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240
------------[ cut here ]------------
Voluntary context switch within RCU read-side critical section!
WARNING: kernel/rcu/tree_plugin.h:332 at rcu_note_context_switch+0xcac/0xf40, CPU#1: dhcpcd/5799
Modules linked in:
CPU: 1 UID: 0 PID: 5799 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:rcu_note_context_switch+0xcac/0xf40
Code: 00 41 c6 45 00 00 48 8b 3d 51 39 66 0e 48 81 c4 b8 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 7b 60 ff ff 48 8d 3d 44 18 6a 0e <67> 48 0f b9 3a e9 1b f4 ff ff 90 0f 0b 90 45 84 e4 0f 84 ea f3 ff
RSP: 0000:ffffc9000612fbb0 EFLAGS: 00010002
RAX: 0000000000000000 RBX: ffff88816ac8d7c0 RCX: 0000000080000002
RDX: 0000000000000000 RSI: ffffffff8c27f8e0 RDI: ffffffff90157400
RBP: dffffc0000000000 R08: ffffffff9011e7b7 R09: 1ffffffff2023cf6
R10: dffffc0000000000 R11: fffffbfff2023cf7 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88823c63bd40 R15: ffff88816ac8dc84
FS:  00007f760087a740(0000) GS:ffff8882a9462000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557357bc77e8 CR3: 0000000171cda000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __schedule+0x304/0x52d0
 schedule+0x164/0x360
 irqentry_exit+0x155/0x620
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0033:0x55734e1fa5ee
Code: 47 10 00 00 00 00 48 c7 47 60 00 00 00 00 48 c7 47 68 00 00 00 00 48 8b 3b 48 85 ff 74 40 48 8b 07 48 8b 57 08 48 85 c0 74 06 <48> 89 50 08 eb 04 48 89 53 08 48 8b 57 08 48 89 02 e8 7c 9a ff ff
RSP: 002b:00007ffd810bed80 EFLAGS: 00010202
RAX: 0000557357bc77e0 RBX: 0000557357bc6dc0 RCX: 0000557357bd4fe0
RDX: 0000557357bc6dc0 RSI: 0000000000000000 RDI: 0000557357bd1280
RBP: 00007ffd810df1f8 R08: 0000000000000007 R09: fed5863560dea6bc
R10: 00007f7600a68088 R11: 0000000000000007 R12: 0000000000000000
R13: 0000557357bd51c0 R14: 00007ffd810df59c R15: 0000557357bd51f4
 </TASK>
