general protection fault, probably for non-canonical address 0xdffffc000000006a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000350-0x0000000000000357] CPU: 0 PID: 86 Comm: kworker/u4:3 Not tainted 5.6.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: krdsd rds_tcp_accept_worker 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:ffffc90000007b00 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a6c87400 RCX: ffffffff86eaabf3 RDX: 000000000000006a RSI: ffffffff86eaad62 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff8880a93aa380 R09: ffffed101219881d R10: ffffed101219881c R11: ffff888090cc40e3 R12: ffff8880a6c87400 R13: 0000000000000078 R14: ffff8880a072a900 R15: 0000000000000010 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff1f5b57e0 CR3: 000000005b829000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rose_transmit_clear_request+0x1de/0x290 net/rose/rose_link.c:255 rose_rx_call_request+0x488/0x1960 net/rose/af_rose.c:976 rose_loopback_timer+0x15d/0x470 net/rose/rose_loopback.c:100 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1405 expire_timers kernel/time/timer.c:1450 [inline] __run_timers kernel/time/timer.c:1774 [inline] __run_timers kernel/time/timer.c:1741 [inline] run_timer_softirq+0x623/0x1600 kernel/time/timer.c:1787 __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 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline] RIP: 0010:kfree+0x1fe/0x2b0 mm/slab.c:3758 Code: 75 6b 48 83 3d e2 da e4 07 00 0f 85 4e ff ff ff 0f 0b e8 65 a6 c8 ff 48 83 3d cd da e4 07 00 0f 84 b3 00 00 00 48 89 df 57 9d <0f> 1f 44 00 00 5b 5d 41 5c 41 5d c3 65 ff 05 17 6d 52 7e 48 8b 05 RSP: 0018:ffffc90000f77a40 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 0000000000000282 RCX: 1ffffffff186490f RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000282 RBP: ffff88809de73c40 R08: 0000000000000001 R09: fffffbfff18561ad R10: fffffbfff18561ac R11: ffffffff8c2b0d67 R12: ffff8880aa0001c0 R13: ffffffff834e8adb R14: ffff88809e6c2520 R15: ffff88809e6c2248 security_sk_free+0x3b/0x80 security/security.c:2125 sk_prot_free net/core/sock.c:1637 [inline] __sk_destruct+0x4a9/0x7c0 net/core/sock.c:1725 sk_destruct+0xc6/0x100 net/core/sock.c:1740 __sk_free+0xef/0x3d0 net/core/sock.c:1751 sk_free+0x78/0xa0 net/core/sock.c:1762 sock_put include/net/sock.h:1778 [inline] tcp_close+0xc06/0x1250 net/ipv4/tcp.c:2511 inet_release+0xe4/0x1f0 net/ipv4/af_inet.c:427 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:471 __sock_release+0x1d3/0x280 net/socket.c:605 rds_tcp_accept_one+0x582/0xb70 net/rds/tcp_listen.c:251 rds_tcp_accept_worker+0x50/0x80 net/rds/tcp.c:525 process_one_work+0x965/0x16a0 kernel/workqueue.c:2266 worker_thread+0x96/0xe20 kernel/workqueue.c:2412 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Modules linked in: ---[ end trace 5e4984e7b0b5930d ]--- 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:ffffc90000007b00 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a6c87400 RCX: ffffffff86eaabf3 RDX: 000000000000006a RSI: ffffffff86eaad62 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff8880a93aa380 R09: ffffed101219881d R10: ffffed101219881c R11: ffff888090cc40e3 R12: ffff8880a6c87400 R13: 0000000000000078 R14: ffff8880a072a900 R15: 0000000000000010 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff1f5b57e0 CR3: 000000005b829000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400