------------[ cut here ]------------ WARNING: CPU: 3 PID: 13235 at net/core/skbuff.c:5336 skb_try_coalesce+0x160a/0x1a10 net/core/skbuff.c:5336 Modules linked in: CPU: 3 PID: 13235 Comm: syz-executor.0 Not tainted 5.18.0-syzkaller-02752-gfdaf9a5840ac #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:skb_try_coalesce+0x160a/0x1a10 net/core/skbuff.c:5336 Code: 8b 44 24 40 48 85 c0 0f 84 7a f3 ff ff e8 6e 93 32 fa 48 8b 44 24 08 48 83 e8 01 48 89 44 24 68 e9 62 f3 ff ff e8 56 93 32 fa <0f> 0b e9 32 f5 ff ff e8 3a 1c 7e fa e9 37 f7 ff ff e8 40 93 32 fa RSP: 0018:ffffc90006d37268 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 000000000000009c RCX: ffffc90003553000 RDX: 0000000000040000 RSI: ffffffff8746ff7a RDI: 0000000000000003 RBP: ffff88801ec36b40 R08: 000000000000009c R09: 0000000000000000 R10: ffffffff8746f4aa R11: 0000000000000000 R12: ffff88801d9f5c68 R13: ffff88801bbebac0 R14: ffff88801bbec2c0 R15: 000000000000021c FS: 0000000000000000(0000) GS:ffff88802cc00000(0063) knlGS:00000000f7fb8b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020006000 CR3: 000000001bf56000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tcp_try_coalesce net/ipv4/tcp_input.c:4652 [inline] tcp_try_coalesce+0x393/0x920 net/ipv4/tcp_input.c:4631 tcp_queue_rcv+0x8a/0x6e0 net/ipv4/tcp_input.c:4923 tcp_data_queue+0x15bd/0x4c90 net/ipv4/tcp_input.c:5038 tcp_rcv_established+0x82d/0x2020 net/ipv4/tcp_input.c:5979 tcp_v4_do_rcv+0x66c/0x980 net/ipv4/tcp_ipv4.c:1660 sk_backlog_rcv include/net/sock.h:1051 [inline] __release_sock+0x134/0x3b0 net/core/sock.c:2794 release_sock+0x54/0x1b0 net/core/sock.c:3327 sk_wait_data+0x177/0x450 net/core/sock.c:2836 tcp_recvmsg_locked+0xe59/0x2020 net/ipv4/tcp.c:2461 tcp_recvmsg+0x131/0x6f0 net/ipv4/tcp.c:2576 inet_recvmsg+0x11b/0x5e0 net/ipv4/af_inet.c:850 sock_recvmsg_nosec net/socket.c:948 [inline] sock_recvmsg net/socket.c:966 [inline] sock_recvmsg net/socket.c:962 [inline] ____sys_recvmsg+0x2c7/0x600 net/socket.c:2664 ___sys_recvmsg+0x127/0x200 net/socket.c:2706 __sys_recvmsg+0xe9/0x1b0 net/socket.c:2736 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+0x53/0x62 RIP: 0023:0xf7fde549 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:00000000f7fb85cc EFLAGS: 00000296 ORIG_RAX: 0000000000000174 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000020001500 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi 4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d a: 10 06 adc %al,(%rsi) c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 10: 10 07 adc %al,(%rdi) 12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi 16: 10 08 adc %cl,(%rax) 18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1c: 00 00 add %al,(%rax) 1e: 00 00 add %al,(%rax) 20: 00 51 52 add %dl,0x52(%rcx) 23: 55 push %rbp 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 * 2a: 5d pop %rbp <-- trapping instruction 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 retq 2e: 90 nop 2f: 90 nop 30: 90 nop 31: 90 nop 32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi