general protection fault, probably for non-canonical address 0xdffffc001fffffff: 0000 [#1] PREEMPT SMP KASAN KASAN: probably user-memory-access in range [0x00000000fffffff8-0x00000000ffffffff] CPU: 1 PID: 15408 Comm: kworker/u4:9 Not tainted 5.15.0-rc6-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/0x2b0 net/core/dst.c:154 Code: 0f 1f 84 00 00 00 00 00 0f 1f 00 41 55 41 54 55 53 48 89 fb e8 c2 47 54 fa 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 29 02 00 00 48 8d 7b 3a 4c 8b 23 48 b8 00 00 00 RSP: 0018:ffffc90000dc0d50 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: 00000000ffffffff RCX: 0000000000000100 RDX: 000000001fffffff RSI: ffffffff8722956e RDI: 00000000ffffffff RBP: 0000000000000000 R08: 0000000000000000 R09: ffff8880764885ab R10: ffffffff87b5d0a0 R11: 0000000000086089 R12: dffffc0000000000 R13: 0000607f4607bfa0 R14: ffffffff8d6e79a4 R15: 00000000ffffffff FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efc02f7a718 CR3: 00000000a4237000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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:213 fib_nh_release net/ipv4/fib_semantics.c:225 [inline] free_fib_info_rcu+0x24b/0x4e0 net/ipv4/fib_semantics.c:237 rcu_do_batch kernel/rcu/tree.c:2508 [inline] rcu_core+0x7ab/0x1470 kernel/rcu/tree.c:2743 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5593 Code: c2 a5 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc90004577ba0 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff920008aef76 RCX: 96ab8122bc4eac87 RDX: 1ffff1100f425143 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8fcff9e7 R10: fffffbfff1f9ff3c R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff8b981b20 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:267 [inline] rcu_read_lock include/linux/rcupdate.h:687 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:723 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: ---[ end trace ac287ef2bef421e8 ]--- RIP: 0010:dst_dev_put+0x1f/0x2b0 net/core/dst.c:154 ---------------- Code disassembly (best guess): 0: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 7: 00 8: 0f 1f 00 nopl (%rax) b: 41 55 push %r13 d: 41 54 push %r12 f: 55 push %rbp 10: 53 push %rbx 11: 48 89 fb mov %rdi,%rbx 14: e8 c2 47 54 fa callq 0xfa5447db 19: 48 89 da mov %rbx,%rdx 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 29 02 00 00 jne 0x25d 34: 48 8d 7b 3a lea 0x3a(%rbx),%rdi 38: 4c 8b 23 mov (%rbx),%r12 3b: 48 rex.W 3c: b8 .byte 0xb8 3d: 00 00 add %al,(%rax)