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: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__switch_to_asm+0x8/0x40 arch/x86/entry/entry_64.S:233
Code: 24 28 48 c7 84 c4 48 01 00 00 00 00 00 00 8b 44 24 3c 89 44 24 38 e9 2f fd ff ff cc cc cc cc cc cc cc 55 53 41 54 41 55 41 56 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 0018:ffffc90000cdf9c0 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff8880ae635e18 RCX: 0000000000000000
RDX: 1ffff11015cc6bc2 RSI: ffff88806051a580 RDI: ffff8880a95e01c0
RBP: ffffc90000cdfab8 R08: 0000000000000001 R09: ffff8880a95e0a88
R10: fffffbfff155cb69 R11: 0000000000000000 R12: ffff8880ae635e00
R13: ffff8880a95e01c0 R14: ffff88806051a580 R15: ffff8880a95e05f0
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005648057234e0 CR3: 0000000060522000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 context_switch kernel/sched/core.c:3453 [inline]
 __schedule+0x8e1/0x1eb0 kernel/sched/core.c:4178
 preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:4436
 idtentry_exit_cond_resched arch/x86/entry/common.c:663 [inline]
 idtentry_exit_cond_rcu+0xc0/0xf0 arch/x86/entry/common.c:710
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:587
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline]
RIP: 0010:lock_release+0x481/0x8d0 kernel/locking/lockdep.c:4980
Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 7f 03 00 00 48 83 3d 6b d7 5a 08 00 0f 84 a9 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c5 48 c7 45 00
RSP: 0018:ffffc90000cdfbb8 EFLAGS: 00000286
RAX: 1ffffffff1369c10 RBX: ffff8880a95e01c0 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff89bc11c0 RDI: 0000000000000286
RBP: 1ffff9200019bf79 R08: 0000000000000001 R09: ffff8880a95e0a88
R10: fffffbfff155cb69 R11: 0000000000000000 R12: 0000000000000002
R13: ffffffff87c9abc1 R14: 0000000000000003 R15: ffff8880a95e01c0
 rcu_lock_release include/linux/rcupdate.h:246 [inline]
 rcu_read_unlock include/linux/rcupdate.h:688 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:411 [inline]
 batadv_nc_worker+0x7a3/0xe50 net/batman-adv/network-coding.c:718
 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 ecdf0bee7319a3f5 ]---
RIP: 0010:__switch_to_asm+0x8/0x40 arch/x86/entry/entry_64.S:233
Code: 24 28 48 c7 84 c4 48 01 00 00 00 00 00 00 8b 44 24 3c 89 44 24 38 e9 2f fd ff ff cc cc cc cc cc cc cc 55 53 41 54 41 55 41 56 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 0018:ffffc90000cdf9c0 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff8880ae635e18 RCX: 0000000000000000
RDX: 1ffff11015cc6bc2 RSI: ffff88806051a580 RDI: ffff8880a95e01c0
RBP: ffffc90000cdfab8 R08: 0000000000000001 R09: ffff8880a95e0a88
R10: fffffbfff155cb69 R11: 0000000000000000 R12: ffff8880ae635e00
R13: ffff8880a95e01c0 R14: ffff88806051a580 R15: ffff8880a95e05f0
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005648057234e0 CR3: 0000000060522000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400