kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN CPU: 0 PID: 25432 Comm: syz-executor1 Not tainted 5.3.0-rc4+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__skb_unlink include/linux/skbuff.h:2006 [inline] RIP: 0010:skb_unlink+0xbb/0x160 net/core/skbuff.c:3159 Code: 00 00 49 8d 7d 08 4c 8b 63 08 48 ba 00 00 00 00 00 fc ff df 48 c7 43 08 00 00 00 00 48 89 f9 48 c7 03 00 00 00 00 48 c1 e9 03 <80> 3c 11 00 75 5b 4c 89 e1 4d 89 65 08 48 ba 00 00 00 00 00 fc ff RSP: 0018:ffff8881c77e7838 EFLAGS: 00010002 RAX: 0000000000000286 RBX: ffff8881bc157500 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000008 RBP: ffff8881c77e7860 R08: 0000000000000004 R09: ffffed1038efcef3 R10: ffffed1038efcef3 R11: 0000000000000003 R12: 0000000000000000 R13: 0000000000000000 R14: ffff8881c8ef6ea8 R15: 0000000000000000 FS: 00007f6ef2a28700(0000) GS:ffff8881db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000202bf000 CR3: 00000001c773a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_recvmsg+0x3a9/0x560 net/kcm/kcmsock.c:1157 sock_recvmsg_nosec net/socket.c:871 [inline] sock_recvmsg+0xf4/0x130 net/socket.c:889 ___sys_recvmsg+0x22f/0x590 net/socket.c:2480 do_recvmmsg+0x21d/0x670 net/socket.c:2601 __sys_recvmmsg+0x189/0x1c0 net/socket.c:2682 __do_sys_recvmmsg net/socket.c:2703 [inline] __se_sys_recvmmsg net/socket.c:2696 [inline] __x64_sys_recvmmsg+0xc0/0x160 net/socket.c:2696 do_syscall_64+0xd6/0x550 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b59 Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6ef2a27c68 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f6ef2a286d4 RCX: 0000000000455b59 RDX: 00000000040000f7 RSI: 00000000200002c0 RDI: 0000000000000006 RBP: 000000000072bea0 R08: 0000000020000200 R09: 0000000000000000 R10: 0000000000000060 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000574 R14: 00000000006fd380 R15: 0000000000000000 Modules linked in: ---[ end trace 7794fa67b12f8f4d ]--- RIP: 0010:__skb_unlink include/linux/skbuff.h:2006 [inline] RIP: 0010:skb_unlink+0xbb/0x160 net/core/skbuff.c:3159 Code: 00 00 49 8d 7d 08 4c 8b 63 08 48 ba 00 00 00 00 00 fc ff df 48 c7 43 08 00 00 00 00 48 89 f9 48 c7 03 00 00 00 00 48 c1 e9 03 <80> 3c 11 00 75 5b 4c 89 e1 4d 89 65 08 48 ba 00 00 00 00 00 fc ff RSP: 0018:ffff8881c77e7838 EFLAGS: 00010002 RAX: 0000000000000286 RBX: ffff8881bc157500 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000008 RBP: ffff8881c77e7860 R08: 0000000000000004 R09: ffffed1038efcef3 R10: ffffed1038efcef3 R11: 0000000000000003 R12: 0000000000000000 R13: 0000000000000000 R14: ffff8881c8ef6ea8 R15: 0000000000000000 FS: 00007f6ef2a28700(0000) GS:ffff8881db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000202bf000 CR3: 00000001c773a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400