BUG: sleeping function called from invalid context at mm/vmalloc.c:3409
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 8172, name: dhcpcd
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
Preemption disabled at:
[<ffffffff8b91af20>] __schedule_loop kernel/sched/core.c:7042 [inline]
[<ffffffff8b91af20>] schedule+0xe0/0x3a0 kernel/sched/core.c:7058
CPU: 3 UID: 101 PID: 8172 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 __might_resched+0x3c0/0x5e0 kernel/sched/core.c:8957
 vfree+0x75/0xb50 mm/vmalloc.c:3409
 futex_hash_free+0x98/0xc0 kernel/futex/core.c:1742
 __mmdrop+0x33f/0x580 kernel/fork.c:692
 mmdrop include/linux/sched/mm.h:55 [inline]
 mmdrop_sched include/linux/sched/mm.h:83 [inline]
 mmdrop_lazy_tlb_sched include/linux/sched/mm.h:110 [inline]
 finish_task_switch.isra.0+0x7a4/0xc10 kernel/sched/core.c:5250
 context_switch kernel/sched/core.c:5360 [inline]
 __schedule+0x1198/0x5de0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:7058
 schedule_hrtimeout_range_clock+0x2dc/0x320 kernel/time/sleep_timeout.c:207
 poll_schedule_timeout.constprop.0+0xc4/0x1c0 fs/select.c:241
 do_poll fs/select.c:958 [inline]
 do_sys_poll+0xae8/0xdf0 fs/select.c:1009
 __do_sys_ppoll fs/select.c:1115 [inline]
 __se_sys_ppoll fs/select.c:1095 [inline]
 __x64_sys_ppoll+0x254/0x2d0 fs/select.c:1095
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7344076407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffcecd5eb70 EFLAGS: 00000202 ORIG_RAX: 000000000000010f
RAX: ffffffffffffffda RBX: 00007f7343fec740 RCX: 00007f7344076407
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000559d66b8b440
RBP: 00007ffcecd5eeb0 R08: 0000000000000008 R09: 0000000000000000
R10: 00007ffcecd5eeb0 R11: 0000000000000202 R12: 0000559d5773a5e0
R13: 0000559d66b7dd90 R14: 0000000000000000 R15: 00007ffcecd5ec60
 </TASK>