general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 2 PID: 6447 Comm: syz-executor.3 Not tainted 5.19.0-rc6-syzkaller-00115-g4a57a8400075 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 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 3b 3d 15 00 31 ff 41 89 c7 89 c6 e8 ef 0c 2d fa 45 84 ff 0f 85 4f ff ff ff e8 e1 10 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:ffffc9000d00f668 EFLAGS: 00010202 RAX: 0000000000000001 RBX: ffff888029953e00 RCX: ffffc90003473000 RDX: 0000000000040000 RSI: ffffffff874d59ff RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88802a723cf0 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802ca00000(0063) knlGS:00000000f7fa6b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000002eb29000 CR3: 000000004e044000 CR4: 0000000000150ee0 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+0xec/0x1b0 net/socket.c:2571 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7fab549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7fa65cc EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000300 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 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 3b 3d 15 00 31 ff 41 89 c7 89 c6 e8 ef 0c 2d fa 45 84 ff 0f 85 4f ff ff ff e8 e1 10 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:ffffc9000d00f668 EFLAGS: 00010202 RAX: 0000000000000001 RBX: ffff888029953e00 RCX: ffffc90003473000 RDX: 0000000000040000 RSI: ffffffff874d59ff RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88802a723cf0 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802ca00000(0063) knlGS:00000000f7fa6b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000002eb29000 CR3: 000000004e044000 CR4: 0000000000152ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e8 3b 3d 15 00 callq 0x153d40 5: 31 ff xor %edi,%edi 7: 41 89 c7 mov %eax,%r15d a: 89 c6 mov %eax,%esi c: e8 ef 0c 2d fa callq 0xfa2d0d00 11: 45 84 ff test %r15b,%r15b 14: 0f 85 4f ff ff ff jne 0xffffff69 1a: e8 e1 10 2d fa callq 0xfa2d1100 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