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: 3611 Comm: syz-executor235 Not tainted 5.19.0-rc6-syzkaller-00269-g9bd572ec7a66 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 RIP: 0010:_compound_head include/linux/page-flags.h:272 [inline] RIP: 0010:put_page include/linux/mm.h:1225 [inline] RIP: 0010:__skb_frag_unref include/linux/skbuff.h:3487 [inline] RIP: 0010:skb_release_data+0x43a/0x810 net/core/skbuff.c:672 Code: e8 0b 3d 15 00 31 ff 41 89 c7 89 c6 e8 ff 09 2d fa 45 84 ff 0f 85 4f ff ff ff e8 f1 0d 2d fa 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 ee 02 00 00 48 8b 45 08 31 ff 49 89 c7 48 89 RSP: 0018:ffffc9000304f688 EFLAGS: 00010202 RAX: 0000000000000001 RBX: ffff888075a768c0 RCX: 0000000000000000 RDX: ffff888024ea0000 RSI: ffffffff874d5e2f RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8881482bb0f0 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007fd1ded89700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000560a2a1264e8 CR3: 000000001ce11000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_release_all net/core/skbuff.c:742 [inline] __kfree_skb net/core/skbuff.c:756 [inline] kfree_skb_reason.part.0+0xe2/0x320 net/core/skbuff.c:778 kfree_skb_reason include/linux/refcount.h:279 [inline] kfree_skb_list_reason+0xab/0x160 net/core/skbuff.c:788 __dev_xmit_skb net/core/dev.c:3886 [inline] __dev_queue_xmit+0x2250/0x3900 net/core/dev.c:4221 packet_snd net/packet/af_packet.c:3073 [inline] packet_sendmsg+0x21cb/0x5550 net/packet/af_packet.c:3104 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 ____sys_sendmsg+0x6eb/0x810 net/socket.c:2488 ___sys_sendmsg+0xf3/0x170 net/socket.c:2542 __sys_sendmsg net/socket.c:2571 [inline] __do_sys_sendmsg net/socket.c:2580 [inline] __se_sys_sendmsg net/socket.c:2578 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2578 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd1dedf8e39 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:00007fd1ded892f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fd1dee82430 RCX: 00007fd1dedf8e39 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004 RBP: 00007fd1dee4f1a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd1dee4f068 R13: 0000000020000358 R14: 7974742f7665642f R15: 00007fd1dee82438 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:_compound_head include/linux/page-flags.h:272 [inline] RIP: 0010:put_page include/linux/mm.h:1225 [inline] RIP: 0010:__skb_frag_unref include/linux/skbuff.h:3487 [inline] RIP: 0010:skb_release_data+0x43a/0x810 net/core/skbuff.c:672 Code: e8 0b 3d 15 00 31 ff 41 89 c7 89 c6 e8 ff 09 2d fa 45 84 ff 0f 85 4f ff ff ff e8 f1 0d 2d fa 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 ee 02 00 00 48 8b 45 08 31 ff 49 89 c7 48 89 RSP: 0018:ffffc9000304f688 EFLAGS: 00010202 RAX: 0000000000000001 RBX: ffff888075a768c0 RCX: 0000000000000000 RDX: ffff888024ea0000 RSI: ffffffff874d5e2f RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8881482bb0f0 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007fd1ded89700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000560a2a1264e8 CR3: 000000001ce11000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e8 0b 3d 15 00 callq 0x153d10 5: 31 ff xor %edi,%edi 7: 41 89 c7 mov %eax,%r15d a: 89 c6 mov %eax,%esi c: e8 ff 09 2d fa callq 0xfa2d0a10 11: 45 84 ff test %r15b,%r15b 14: 0f 85 4f ff ff ff jne 0xffffff69 1a: e8 f1 0d 2d fa callq 0xfa2d0e10 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 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 0f 85 ee 02 00 00 jne 0x323 35: 48 8b 45 08 mov 0x8(%rbp),%rax 39: 31 ff xor %edi,%edi 3b: 49 89 c7 mov %rax,%r15 3e: 48 rex.W 3f: 89 .byte 0x89