Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 UID: 0 PID: 7355 Comm: syz.3.448 Not tainted 6.11.0-rc6-syzkaller-00026-g88fac17500f4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:_compound_head include/linux/page-flags.h:240 [inline] RIP: 0010:put_page+0x23/0x260 include/linux/mm.h:1554 Code: 90 90 90 90 90 90 90 55 41 57 41 56 53 49 89 fe 48 bd 00 00 00 00 00 fc ff df e8 28 b5 1b f8 49 8d 5e 08 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 4f d7 7f f8 48 8b 1b 48 89 de 48 83 RSP: 0000:ffffc9000327ea48 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000040000 RDX: ffffc9000bb5a000 RSI: 0000000000015d21 RDI: 0000000000015d22 RBP: dffffc0000000000 R08: ffffffff89776b5d R09: 1ffff1100d828eec R10: dffffc0000000000 R11: ffffed100d828eed R12: 0000000000000009 R13: ffff88806c147742 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fbd9d6e86c0(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3220dff8 CR3: 0000000031668000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_page_unref include/linux/skbuff_ref.h:44 [inline] __skb_frag_unref include/linux/skbuff_ref.h:57 [inline] skb_release_data+0x467/0x880 net/core/skbuff.c:1117 skb_release_all net/core/skbuff.c:1188 [inline] __kfree_skb net/core/skbuff.c:1202 [inline] sk_skb_reason_drop+0x1a5/0x3d0 net/core/skbuff.c:1240 tcp_drop_reason net/ipv4/tcp_input.c:4901 [inline] tcp_data_queue+0xc96/0x76c0 net/ipv4/tcp_input.c:5298 tcp_rcv_state_process+0x17cc/0x4570 net/ipv4/tcp_input.c:6931 tcp_v4_do_rcv+0x77d/0xc70 net/ipv4/tcp_ipv4.c:1934 sk_backlog_rcv include/net/sock.h:1111 [inline] __release_sock+0x214/0x350 net/core/sock.c:3004 release_sock+0x61/0x1f0 net/core/sock.c:3558 __mptcp_close_ssk+0x6ad/0x1070 net/mptcp/protocol.c:2455 mptcp_pm_nl_rm_addr_or_subflow+0x4ea/0xbb0 net/mptcp/pm_netlink.c:867 mptcp_pm_nl_rm_subflow_received net/mptcp/pm_netlink.c:903 [inline] mptcp_nl_remove_id_zero_address net/mptcp/pm_netlink.c:1584 [inline] mptcp_pm_nl_del_addr_doit+0xa7d/0x1bc0 net/mptcp/pm_netlink.c:1615 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbd9c97cef9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbd9d6e8038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fbd9cb36208 RCX: 00007fbd9c97cef9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 000000000000000a RBP: 00007fbd9c9ef01e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fbd9cb36208 R15: 00007ffe305247e8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:_compound_head include/linux/page-flags.h:240 [inline] RIP: 0010:put_page+0x23/0x260 include/linux/mm.h:1554 Code: 90 90 90 90 90 90 90 55 41 57 41 56 53 49 89 fe 48 bd 00 00 00 00 00 fc ff df e8 28 b5 1b f8 49 8d 5e 08 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 4f d7 7f f8 48 8b 1b 48 89 de 48 83 RSP: 0000:ffffc9000327ea48 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000040000 RDX: ffffc9000bb5a000 RSI: 0000000000015d21 RDI: 0000000000015d22 RBP: dffffc0000000000 R08: ffffffff89776b5d R09: 1ffff1100d828eec R10: dffffc0000000000 R11: ffffed100d828eed R12: 0000000000000009 R13: ffff88806c147742 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fbd9d6e86c0(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055cec2047078 CR3: 0000000031668000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 55 push %rbp 8: 41 57 push %r15 a: 41 56 push %r14 c: 53 push %rbx d: 49 89 fe mov %rdi,%r14 10: 48 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%rbp 17: fc ff df 1a: e8 28 b5 1b f8 call 0xf81bb547 1f: 49 8d 5e 08 lea 0x8(%r14),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 4f d7 7f f8 call 0xf87fd787 38: 48 8b 1b mov (%rbx),%rbx 3b: 48 89 de mov %rbx,%rsi 3e: 48 rex.W 3f: 83 .byte 0x83