general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 11773 Comm: kworker/u4:10 Not tainted 5.14.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:dst_dev_put+0x1f/0x2a0 net/core/dst.c:156
Code: 1f 84 00 00 00 00 00 0f 1f 40 00 41 55 41 54 55 53 48 89 fb e8 62 61 5a fa 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 61 02 00 00 48 8d 7b 3a 4c 8b 23 48 b8 00 00 00
RSP: 0018:ffffc90000dc0d98 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000007 RCX: 0000000000000100
RDX: 0000000000000000 RSI: ffffffff871b265e RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88802c48c56b
R10: ffffffff87ad72b0 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000607f460354c0 R14: ffffffff8d6c3ce4 R15: 0000000000000007
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000036fae000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rt_fibinfo_free_cpus.part.0+0xf5/0x180 net/ipv4/fib_semantics.c:202
 rt_fibinfo_free_cpus net/ipv4/fib_semantics.c:194 [inline]
 fib_nh_common_release+0x10c/0x330 net/ipv4/fib_semantics.c:215
 fib6_info_destroy_rcu+0x187/0x210 net/ipv6/ip6_fib.c:175
 rcu_do_batch kernel/rcu/tree.c:2550 [inline]
 rcu_core+0x7ab/0x1380 kernel/rcu/tree.c:2785
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 do_softirq.part.0+0xde/0x130 kernel/softirq.c:459
 </IRQ>
 do_softirq kernel/softirq.c:451 [inline]
 __local_bh_enable_ip+0x102/0x120 kernel/softirq.c:383
 spin_unlock_bh include/linux/spinlock.h:399 [inline]
 batadv_nc_purge_paths+0x2a5/0x3a0 net/batman-adv/network-coding.c:467
 batadv_nc_worker+0x836/0xe50 net/batman-adv/network-coding.c:718
 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Modules linked in:
---[ end trace ba28caf76bc62075 ]---
RIP: 0010:dst_dev_put+0x1f/0x2a0 net/core/dst.c:156
Code: 1f 84 00 00 00 00 00 0f 1f 40 00 41 55 41 54 55 53 48 89 fb e8 62 61 5a fa 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 61 02 00 00 48 8d 7b 3a 4c 8b 23 48 b8 00 00 00
RSP: 0018:ffffc90000dc0d98 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000007 RCX: 0000000000000100
RDX: 0000000000000000 RSI: ffffffff871b265e RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88802c48c56b
R10: ffffffff87ad72b0 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000607f460354c0 R14: ffffffff8d6c3ce4 R15: 0000000000000007
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000036fae000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600