general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 27032 Comm: kworker/u4:1 Not tainted 5.8.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:__switch_to_asm+0x0/0x40 arch/x86/entry/entry_64.S:228
Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 0018:ffffc900041cf8c8 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff8880ae635e18 RCX: 0000000000000000
RDX: 1ffff11015cc6bc2 RSI: ffff88805d1f4340 RDI: ffff88804d520440
RBP: ffffc900041cf998 R08: 0000000000000001 R09: ffff88804d520d08
R10: fffffbfff155c591 R11: 0000000000000000 R12: ffff8880ae635e00
R13: ffff88804d520440 R14: ffff88805d1f4340 R15: ffff88804d520870
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc6f908db8 CR3: 000000005d1ce000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 context_switch kernel/sched/core.c:3430 [inline]
 __schedule+0x8e1/0x1eb0 kernel/sched/core.c:4155
 preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:4413
 idtentry_exit_cond_resched arch/x86/entry/common.c:621 [inline]
 idtentry_exit_cond_rcu+0xc0/0xf0 arch/x86/entry/common.c:668
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline]
RIP: 0010:lock_acquire+0x270/0xad0 kernel/locking/lockdep.c:4962
Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 f8 06 00 00 48 83 3d ed 0b 5b 08 00 0f 84 a6 05 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 10 48 c7
RSP: 0018:ffffc900041cfa98 EFLAGS: 00000286
RAX: 1ffffffff13696a8 RBX: ffff88804d520440 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: aeb7010df33ae164 RDI: 0000000000000286
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8c58ba27
R10: fffffbfff18b1744 R11: 0000000000000000 R12: 0000000000000002
R13: ffffffff89bbe640 R14: 0000000000000000 R15: ffff88804d520440
 rcu_lock_acquire include/linux/rcupdate.h:241 [inline]
 rcu_read_lock include/linux/rcupdate.h:634 [inline]
 batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:754 [inline]
 batadv_iv_ogm_schedule_buff+0x5d0/0x1410 net/batman-adv/bat_iv_ogm.c:825
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:869 [inline]
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:862 [inline]
 batadv_iv_send_outstanding_bat_ogm_packet+0x5c8/0x800 net/batman-adv/bat_iv_ogm.c:1722
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Modules linked in:
---[ end trace fb510923f6d46b75 ]---
RIP: 0010:__switch_to_asm+0x0/0x40 arch/x86/entry/entry_64.S:228
Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 0018:ffffc900041cf8c8 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff8880ae635e18 RCX: 0000000000000000
RDX: 1ffff11015cc6bc2 RSI: ffff88805d1f4340 RDI: ffff88804d520440
RBP: ffffc900041cf998 R08: 0000000000000001 R09: ffff88804d520d08
R10: fffffbfff155c591 R11: 0000000000000000 R12: ffff8880ae635e00
R13: ffff88804d520440 R14: ffff88805d1f4340 R15: ffff88804d520870
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc6f908db8 CR3: 000000005d1ce000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400