general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 PID: 8377 Comm: kworker/1:6 Not tainted 5.15.0-rc3-next-20210927-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events netlink_sock_destruct_work RIP: 0010:klist_iter_exit+0x21/0x80 lib/klist.c:313 Code: 66 0f 1f 84 00 00 00 00 00 41 54 55 53 48 89 fb e8 04 a8 84 fd 48 8d 6b 08 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 <80> 3c 02 00 75 40 4c 8b 63 08 4d 85 e4 74 2e e8 db a7 84 fd 31 f6 RSP: 0018:ffffc9000b8e7bf8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83f1999c RDI: 0000000000000000 RBP: 0000000000000008 R08: 0000000000000000 R09: ffffc9000b8e7b6f R10: fffff5200171cf6d R11: 0000000000000000 R12: ffff88806e824540 R13: 0000000000000000 R14: ffff88807b6c4e20 R15: ffff8880b9d39240 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0119b5010 CR3: 0000000039b1d000 CR4: 00000000003526e0 Call Trace: nfc_device_iter_exit net/nfc/nfc.h:121 [inline] nfc_genl_dump_devices_done+0x31/0x50 net/nfc/netlink.c:639 genl_lock_done+0x8d/0x100 net/netlink/genetlink.c:628 netlink_sock_destruct+0x96/0x2b0 net/netlink/af_netlink.c:398 __sk_destruct+0x4b/0x900 net/core/sock.c:1914 sk_destruct+0xbd/0xe0 net/core/sock.c:1958 __sk_free+0xef/0x3d0 net/core/sock.c:1969 sk_free+0x78/0xa0 net/core/sock.c:1980 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: ---[ end trace dbaea3ce2e0c860a ]--- RIP: 0010:klist_iter_exit+0x21/0x80 lib/klist.c:313 Code: 66 0f 1f 84 00 00 00 00 00 41 54 55 53 48 89 fb e8 04 a8 84 fd 48 8d 6b 08 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 <80> 3c 02 00 75 40 4c 8b 63 08 4d 85 e4 74 2e e8 db a7 84 fd 31 f6 RSP: 0018:ffffc9000b8e7bf8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83f1999c RDI: 0000000000000000 RBP: 0000000000000008 R08: 0000000000000000 R09: ffffc9000b8e7b6f R10: fffff5200171cf6d R11: 0000000000000000 R12: ffff88806e824540 R13: 0000000000000000 R14: ffff88807b6c4e20 R15: ffff8880b9d39240 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0119b5010 CR3: 0000000039b1d000 CR4: 00000000003526e0 ---------------- Code disassembly (best guess): 0: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 7: 00 00 9: 41 54 push %r12 b: 55 push %rbp c: 53 push %rbx d: 48 89 fb mov %rdi,%rbx 10: e8 04 a8 84 fd callq 0xfd84a819 15: 48 8d 6b 08 lea 0x8(%rbx),%rbp 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 ea mov %rbp,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 40 jne 0x70 30: 4c 8b 63 08 mov 0x8(%rbx),%r12 34: 4d 85 e4 test %r12,%r12 37: 74 2e je 0x67 39: e8 db a7 84 fd callq 0xfd84a819 3e: 31 f6 xor %esi,%esi