general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf] CPU: 0 PID: 4538 Comm: syz.3.74 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:sk_psock_verdict_data_ready+0x143/0x1d0 net/core/skmsg.c:1251 Code: 24 50 48 c7 44 24 48 01 00 00 00 43 80 3c 2e 00 74 08 4c 89 ff e8 2d 16 c2 f9 41 bc c8 00 00 00 4d 03 27 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 0e 16 c2 f9 48 8b 7c 24 18 48 8d RSP: 0018:ffffc9000319f800 EFLAGS: 00010202 RAX: 0000000000000019 RBX: 1ffff92000633f04 RCX: 0000000000080000 RDX: ffffc90005069000 RSI: 000000000003fa0c RDI: 000000000003fa0d RBP: ffffc9000319f8d0 R08: ffffc9000319f85f R09: ffffc9000319f840 R10: dffffc0000000000 R11: fffff52000633f0c R12: 00000000000000c8 R13: dffffc0000000000 R14: 1ffff1100c028844 R15: ffff888060144220 FS: 00007f7ea8f7d6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32521ff8 CR3: 000000004b2ef000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: unix_stream_sendmsg+0x7d1/0xc90 net/unix/af_unix.c:2110 sock_sendmsg_nosec net/socket.c:706 [inline] __sock_sendmsg net/socket.c:718 [inline] ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2445 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2499 __sys_sendmsg net/socket.c:2528 [inline] __do_sys_sendmsg net/socket.c:2537 [inline] __se_sys_sendmsg+0x1af/0x290 net/socket.c:2535 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f7eaad23819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7ea8f7d028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f7eaaf9cfa0 RCX: 00007f7eaad23819 RDX: 0000000000000020 RSI: 0000200000000980 RDI: 0000000000000006 RBP: 00007f7eaadb9c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7eaaf9d038 R14: 00007f7eaaf9cfa0 R15: 00007ffc58e39f98 Modules linked in: ---[ end trace e73be2a91f08f79f ]--- RIP: 0010:sk_psock_verdict_data_ready+0x143/0x1d0 net/core/skmsg.c:1251 Code: 24 50 48 c7 44 24 48 01 00 00 00 43 80 3c 2e 00 74 08 4c 89 ff e8 2d 16 c2 f9 41 bc c8 00 00 00 4d 03 27 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 0e 16 c2 f9 48 8b 7c 24 18 48 8d RSP: 0018:ffffc9000319f800 EFLAGS: 00010202 RAX: 0000000000000019 RBX: 1ffff92000633f04 RCX: 0000000000080000 RDX: ffffc90005069000 RSI: 000000000003fa0c RDI: 000000000003fa0d RBP: ffffc9000319f8d0 R08: ffffc9000319f85f R09: ffffc9000319f840 R10: dffffc0000000000 R11: fffff52000633f0c R12: 00000000000000c8 R13: dffffc0000000000 R14: 1ffff1100c028844 R15: ffff888060144220 FS: 00007f7ea8f7d6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555560bae4e8 CR3: 000000004b2ef000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 24 50 and $0x50,%al 2: 48 c7 44 24 48 01 00 movq $0x1,0x48(%rsp) 9: 00 00 b: 43 80 3c 2e 00 cmpb $0x0,(%r14,%r13,1) 10: 74 08 je 0x1a 12: 4c 89 ff mov %r15,%rdi 15: e8 2d 16 c2 f9 call 0xf9c21647 1a: 41 bc c8 00 00 00 mov $0xc8,%r12d 20: 4d 03 27 add (%r15),%r12 23: 4c 89 e0 mov %r12,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 e7 mov %r12,%rdi 34: e8 0e 16 c2 f9 call 0xf9c21647 39: 48 8b 7c 24 18 mov 0x18(%rsp),%rdi 3e: 48 rex.W 3f: 8d .byte 0x8d