general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 0 PID: 29540 Comm: syz-executor.5 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:smc_tx_sendmsg+0x204/0x1ba0 net/smc/smc_tx.c:157 Code: 48 c1 ea 03 80 3c 02 00 0f 85 8b 17 00 00 49 8b 9d 08 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 20 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 8f 17 00 00 48 63 5b 20 4c 8b RSP: 0018:ffffc900017bf800 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900147ab000 RDX: 0000000000000004 RSI: ffffffff889cd6ae RDI: 0000000000000020 RBP: ffff888066038a00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff889cd6a1 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888066038a00 R14: ffffc900017bfd90 R15: ffff888066038a60 FS: 00007f6145f84700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002918708 CR3: 000000006878e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smc_sendmsg+0x274/0x5b0 net/smc/af_smc.c:2037 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x331/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmmsg+0x195/0x470 net/socket.c:2490 __do_sys_sendmmsg net/socket.c:2519 [inline] __se_sys_sendmmsg net/socket.c:2516 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2516 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6145f84188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000001 RSI: 0000000020003d80 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff4bcb1f8f R14: 00007f6145f84300 R15: 0000000000022000 Modules linked in: ---[ end trace 3bda72ea7f9d2df2 ]--- RIP: 0010:smc_tx_sendmsg+0x204/0x1ba0 net/smc/smc_tx.c:157 Code: 48 c1 ea 03 80 3c 02 00 0f 85 8b 17 00 00 49 8b 9d 08 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 20 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 8f 17 00 00 48 63 5b 20 4c 8b RSP: 0018:ffffc900017bf800 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900147ab000 RDX: 0000000000000004 RSI: ffffffff889cd6ae RDI: 0000000000000020 RBP: ffff888066038a00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff889cd6a1 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888066038a00 R14: ffffc900017bfd90 R15: ffff888066038a60 FS: 00007f6145f84700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f53406e4718 CR3: 000000006878e000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400