general protection fault, probably for non-canonical address 0xdffffc000000006a: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000350-0x0000000000000357]
CPU: 1 PID: 23 Comm: kworker/1:1 Not tainted 5.7.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events iterate_cleanup_work
RIP: 0010:rose_send_frame+0x1dd/0x2f0 net/rose/rose_link.c:101
Code: 48 c1 ea 03 80 3c 02 00 0f 85 06 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 8d bd 50 03 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ea 00 00 00 4c 8b bd 50 03 00 00 e9 77 fe ff ff
RSP: 0018:ffffc90000da8b00 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888215319400 RCX: ffffffff86fb1cc3
RDX: 000000000000006a RSI: ffffffff86fb1e32 RDI: 0000000000000350
RBP: 0000000000000000 R08: ffff8880a902e600 R09: ffffed101257761d
R10: ffff888092bbb0e3 R11: ffffed101257761c R12: ffff888215319400
R13: 0000000000000078 R14: ffff88805ffe1000 R15: 0000000000000010
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e924000 CR3: 0000000058145000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rose_transmit_clear_request+0x1de/0x290 net/rose/rose_link.c:255
 rose_rx_call_request+0x488/0x1960 net/rose/af_rose.c:996
 rose_loopback_timer+0x15d/0x470 net/rose/rose_loopback.c:100
 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x623/0x1600 kernel/time/timer.c:1786
 __do_softirq+0x26c/0x9f7 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x192/0x1d0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:546 [inline]
 smp_apic_timer_interrupt+0x19e/0x600 arch/x86/kernel/apic/apic.c:1140
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:102 [inline]
RIP: 0010:__local_bh_enable_ip+0x18d/0x270 kernel/softirq.c:196
Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 dd 00 00 00 48 83 3d 10 bb 4e 08 00 0f 84 8d 00 00 00 fb 66 0f 1f 44 00 00 <65> 8b 05 94 19 bc 7e 85 c0 74 7d 5b 5d 41 5c c3 80 3d 51 d7 3e 09
RSP: 0018:ffffc90000df7bb0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1329806 RBX: 0000000000000200 RCX: 1ffffffff186bda5
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff8880a902eec4
RBP: ffffffff865c0c2c R08: 0000000000000001 R09: fffffbfff185df6b
R10: ffffffff8c2efb57 R11: fffffbfff185df6a R12: ffff8880a902e600
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000000
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 get_next_corpse net/netfilter/nf_conntrack_core.c:2150 [inline]
 nf_ct_iterate_cleanup+0x212/0x4b0 net/netfilter/nf_conntrack_core.c:2173
 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2258 [inline]
 nf_ct_iterate_cleanup_net+0x113/0x170 net/netfilter/nf_conntrack_core.c:2243
 iterate_cleanup_work+0x45/0x126 net/netfilter/nf_nat_masquerade.c:216
 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268
 worker_thread+0x96/0xe20 kernel/workqueue.c:2414
 kthread+0x388/0x470 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 97a7f46b614acb25 ]---
RIP: 0010:rose_send_frame+0x1dd/0x2f0 net/rose/rose_link.c:101
Code: 48 c1 ea 03 80 3c 02 00 0f 85 06 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 8d bd 50 03 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ea 00 00 00 4c 8b bd 50 03 00 00 e9 77 fe ff ff
RSP: 0018:ffffc90000da8b00 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888215319400 RCX: ffffffff86fb1cc3
RDX: 000000000000006a RSI: ffffffff86fb1e32 RDI: 0000000000000350
RBP: 0000000000000000 R08: ffff8880a902e600 R09: ffffed101257761d
R10: ffff888092bbb0e3 R11: ffffed101257761c R12: ffff888215319400
R13: 0000000000000078 R14: ffff88805ffe1000 R15: 0000000000000010
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e924000 CR3: 0000000058145000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400