divide error: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 PID: 22076 Comm: syz-executor.5 Not tainted 6.9.0-rc6-syzkaller-00022-g98369dccd2f8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:tcp_rcv_space_adjust+0x2df/0x890 net/ipv4/tcp_input.c:767 Code: e3 04 4c 01 eb 48 8b 44 24 38 0f b6 04 10 84 c0 49 89 d5 0f 85 a5 03 00 00 41 8b 8e c8 09 00 00 89 e8 29 c8 48 0f af c3 31 d2 <48> f7 f1 48 8d 1c 43 49 8d 96 76 08 00 00 48 89 d0 48 c1 e8 03 48 RSP: 0018:ffffc90003cdf3f0 EFLAGS: 00010246 RAX: f9b282e083fa9d20 RBX: 000000016595dfc8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000b2c2f1c4 R08: ffffffff89e535a4 R09: 1ffffffff25e6ab7 R10: dffffc0000000000 R11: ffffffff8135e920 R12: ffff888055661a30 R13: dffffc0000000000 R14: ffff888055661a00 R15: 1ffff1100aacc47a FS: 00007f0e9658f6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6c8d8d56c6 CR3: 0000000058332000 CR4: 0000000000350ef0 Call Trace: tcp_recvmsg_locked+0x106d/0x25a0 net/ipv4/tcp.c:2513 tcp_recvmsg+0x25d/0x920 net/ipv4/tcp.c:2578 inet6_recvmsg+0x16a/0x730 net/ipv6/af_inet6.c:680 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg+0x109/0x280 net/socket.c:1068 ____sys_recvmsg+0x1db/0x470 net/socket.c:2803 ___sys_recvmsg net/socket.c:2845 [inline] do_recvmmsg+0x474/0xae0 net/socket.c:2939 __sys_recvmmsg net/socket.c:3018 [inline] __do_sys_recvmmsg net/socket.c:3041 [inline] __se_sys_recvmmsg net/socket.c:3034 [inline] __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3034 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0e9587dea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0e9658f0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f0e959abf80 RCX: 00007f0e9587dea9 RDX: 0000000000000001 RSI: 0000000020000bc0 RDI: 0000000000000006 RBP: 00007f0e958ca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000122 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f0e959abf80 R15: 00007fffbe167b18 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:tcp_rcv_space_adjust+0x2df/0x890 net/ipv4/tcp_input.c:767 Code: e3 04 4c 01 eb 48 8b 44 24 38 0f b6 04 10 84 c0 49 89 d5 0f 85 a5 03 00 00 41 8b 8e c8 09 00 00 89 e8 29 c8 48 0f af c3 31 d2 <48> f7 f1 48 8d 1c 43 49 8d 96 76 08 00 00 48 89 d0 48 c1 e8 03 48 RSP: 0018:ffffc90003cdf3f0 EFLAGS: 00010246 RAX: f9b282e083fa9d20 RBX: 000000016595dfc8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000b2c2f1c4 R08: ffffffff89e535a4 R09: 1ffffffff25e6ab7 R10: dffffc0000000000 R11: ffffffff8135e920 R12: ffff888055661a30 R13: dffffc0000000000 R14: ffff888055661a00 R15: 1ffff1100aacc47a FS: 00007f0e9658f6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbf4cad66e4 CR3: 0000000058332000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: e3 04 jrcxz 0x6 2: 4c 01 eb add %r13,%rbx 5: 48 8b 44 24 38 mov 0x38(%rsp),%rax a: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax e: 84 c0 test %al,%al 10: 49 89 d5 mov %rdx,%r13 13: 0f 85 a5 03 00 00 jne 0x3be 19: 41 8b 8e c8 09 00 00 mov 0x9c8(%r14),%ecx 20: 89 e8 mov %ebp,%eax 22: 29 c8 sub %ecx,%eax 24: 48 0f af c3 imul %rbx,%rax 28: 31 d2 xor %edx,%edx * 2a: 48 f7 f1 div %rcx <-- trapping instruction 2d: 48 8d 1c 43 lea (%rbx,%rax,2),%rbx 31: 49 8d 96 76 08 00 00 lea 0x876(%r14),%rdx 38: 48 89 d0 mov %rdx,%rax 3b: 48 c1 e8 03 shr $0x3,%rax 3f: 48 rex.W