kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 9230 Comm: syz-executor088 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:nfc_alloc_send_skb+0x3a/0x190 net/nfc/core.c:729 Code: 54 41 89 d4 55 53 48 89 fb 48 8d ab 50 05 00 00 48 83 ec 08 e8 27 50 85 f9 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 14 01 00 00 48 8d bb 54 05 00 RSP: 0018:ffff8880af12f8f8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000082 RDX: 00000000000000aa RSI: ffffffff87dd3549 RDI: 0000000000000000 RBP: 0000000000000550 R08: ffff8880af12f9a8 R09: 000000000000087f R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000082 R14: ffff888092084e00 R15: ffff8880af12f9a8 FS: 00007f31ac806700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000300 CR3: 00000000b454d000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nfc_llcp_send_ui_frame+0x29c/0x400 net/nfc/llcp_commands.c:775 llcp_sock_sendmsg+0x2b0/0x3a0 net/nfc/llcp_sock.c:810 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x3b3/0x8e0 net/socket.c:2227 __sys_sendmmsg+0x195/0x470 net/socket.c:2322 __do_sys_sendmmsg net/socket.c:2351 [inline] __se_sys_sendmmsg net/socket.c:2348 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2348 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f31ac875e69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f31ac8062f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 000000000000003c RCX: 00007f31ac875e69 RDX: 0000000000000006 RSI: 0000000020004540 RDI: 0000000000000003 RBP: 00007f31ac8ff3f8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000040 R11: 0000000000000246 R12: 00007f31ac8ff3f0 R13: 93cb663f6753dadd R14: 4b973dfbaeacdab3 R15: f981dd66eb1318f7 Modules linked in: ---[ end trace 42d2ec2468a9950a ]--- RIP: 0010:nfc_alloc_send_skb+0x3a/0x190 net/nfc/core.c:729 Code: 54 41 89 d4 55 53 48 89 fb 48 8d ab 50 05 00 00 48 83 ec 08 e8 27 50 85 f9 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 14 01 00 00 48 8d bb 54 05 00 RSP: 0018:ffff8880af12f8f8 EFLAGS: 00010206 llcp: nfc_llcp_send_ui_frame: Could not allocate PDU (error=-512) RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000082 RDX: 00000000000000aa RSI: ffffffff87dd3549 RDI: 0000000000000000 RBP: 0000000000000550 R08: ffff8880af12f9a8 R09: 000000000000087f R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000082 R14: ffff888092084e00 R15: ffff8880af12f9a8 FS: 00007f31ac806700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffb5e935b8 CR3: 00000000b454d000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 54 push %rsp 1: 41 89 d4 mov %edx,%r12d 4: 55 push %rbp 5: 53 push %rbx 6: 48 89 fb mov %rdi,%rbx 9: 48 8d ab 50 05 00 00 lea 0x550(%rbx),%rbp 10: 48 83 ec 08 sub $0x8,%rsp 14: e8 27 50 85 f9 callq 0xf9855040 19: 48 89 ea mov %rbp,%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: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 08 je 0x3a 32: 3c 03 cmp $0x3,%al 34: 0f 8e 14 01 00 00 jle 0x14e 3a: 48 rex.W 3b: 8d .byte 0x8d 3c: bb .byte 0xbb 3d: 54 push %rsp 3e: 05 .byte 0x5