general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 3643 Comm: syz-executor134 Not tainted 6.1.0-rc5-syzkaller-00144-g84368d882b96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:_compound_head include/linux/page-flags.h:253 [inline] RIP: 0010:put_page include/linux/mm.h:1203 [inline] RIP: 0010:__skb_frag_unref include/linux/skbuff.h:3385 [inline] RIP: 0010:skb_release_data+0x449/0x870 net/core/skbuff.c:783 Code: e8 ac 9d 15 00 31 ff 41 89 c4 89 c6 e8 80 9b cd f9 45 84 e4 0f 85 4f ff ff ff e8 02 9f cd f9 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 0f 85 4a 03 00 00 48 8b 45 08 31 ff 49 89 c4 48 89 RSP: 0018:ffffc90003457660 EFLAGS: 00010202 RAX: 0000000000000001 RBX: ffff888073a981c0 RCX: 0000000000000000 RDX: ffff8880732100c0 RSI: ffffffff87b19d1e RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88807d139cf0 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f29acba6700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000064a110 CR3: 0000000021023000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_release_all net/core/skbuff.c:854 [inline] __kfree_skb net/core/skbuff.c:868 [inline] kfree_skb_reason+0x18a/0x4b0 net/core/skbuff.c:891 kfree_skb_list_reason+0x4b/0x70 net/core/skbuff.c:901 __dev_xmit_skb net/core/dev.c:3886 [inline] __dev_queue_xmit+0x23dd/0x3ba0 net/core/dev.c:4222 packet_snd net/packet/af_packet.c:3073 [inline] packet_sendmsg+0x3359/0x5510 net/packet/af_packet.c:3104 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2482 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2565 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f29acc15e39 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:00007f29acba62f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f29acc9f430 RCX: 00007f29acc15e39 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004 RBP: 00007f29acc6c1a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f29acc6c068 R13: 0000000020000358 R14: 7974742f7665642f R15: 00007f29acc9f438 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:_compound_head include/linux/page-flags.h:253 [inline] RIP: 0010:put_page include/linux/mm.h:1203 [inline] RIP: 0010:__skb_frag_unref include/linux/skbuff.h:3385 [inline] RIP: 0010:skb_release_data+0x449/0x870 net/core/skbuff.c:783 Code: e8 ac 9d 15 00 31 ff 41 89 c4 89 c6 e8 80 9b cd f9 45 84 e4 0f 85 4f ff ff ff e8 02 9f cd f9 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 0f 85 4a 03 00 00 48 8b 45 08 31 ff 49 89 c4 48 89 RSP: 0018:ffffc90003457660 EFLAGS: 00010202 RAX: 0000000000000001 RBX: ffff888073a981c0 RCX: 0000000000000000 RDX: ffff8880732100c0 RSI: ffffffff87b19d1e RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88807d139cf0 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f29acba6700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000064a110 CR3: 0000000021023000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e8 ac 9d 15 00 callq 0x159db1 5: 31 ff xor %edi,%edi 7: 41 89 c4 mov %eax,%r12d a: 89 c6 mov %eax,%esi c: e8 80 9b cd f9 callq 0xf9cd9b91 11: 45 84 e4 test %r12b,%r12b 14: 0f 85 4f ff ff ff jne 0xffffff69 1a: e8 02 9f cd f9 callq 0xf9cd9f21 1f: 48 8d 7d 08 lea 0x8(%rbp),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2f: 0f 85 4a 03 00 00 jne 0x37f 35: 48 8b 45 08 mov 0x8(%rbp),%rax 39: 31 ff xor %edi,%edi 3b: 49 89 c4 mov %rax,%r12 3e: 48 rex.W 3f: 89 .byte 0x89