divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 2689 Comm: syz-executor.2 Not tainted 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__tcp_select_window+0x56d/0xad0 net/ipv4/tcp_output.c:3015 Code: 44 89 ff e8 d5 cd f0 f9 45 39 e7 0f 8d 20 ff ff ff e8 f7 c7 f0 f9 44 89 e3 e9 13 ff ff ff e8 ea c7 f0 f9 44 89 e0 44 89 e3 99 7c 24 04 29 d3 e9 fc fe ff ff e8 d3 c7 f0 f9 41 f7 dc bf 1f 00 RSP: 0018:ffffc9000314fac0 EFLAGS: 00010216 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000d7bc000 RDX: 0000000000000000 RSI: ffffffff87832e76 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff87832e14 R11: 0000000000000000 R12: 0000000000000000 R13: 1ffff92000629f5c R14: 0000000000000000 R15: 0000000000000000 FS: 00007f83e5085700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000052f950 CR3: 0000000012246000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tcp_select_window net/ipv4/tcp_output.c:264 [inline] __tcp_transmit_skb+0xa82/0x38f0 net/ipv4/tcp_output.c:1351 tcp_transmit_skb net/ipv4/tcp_output.c:1423 [inline] tcp_send_active_reset+0x475/0x8e0 net/ipv4/tcp_output.c:3449 tcp_disconnect+0x15a9/0x1e60 net/ipv4/tcp.c:2955 inet_shutdown+0x260/0x430 net/ipv4/af_inet.c:905 __sys_shutdown_sock net/socket.c:2189 [inline] __sys_shutdown_sock net/socket.c:2183 [inline] __sys_shutdown+0xf1/0x1b0 net/socket.c:2201 __do_sys_shutdown net/socket.c:2209 [inline] __se_sys_shutdown net/socket.c:2207 [inline] __x64_sys_shutdown+0x50/0x70 net/socket.c:2207 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x466459 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f83e5085188 EFLAGS: 00000246 ORIG_RAX: 0000000000000030 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffc496ec59f R14: 00007f83e5085300 R15: 0000000000022000 Modules linked in: ---[ end trace acc940f00ccdcd04 ]--- RIP: 0010:__tcp_select_window+0x56d/0xad0 net/ipv4/tcp_output.c:3015 Code: 44 89 ff e8 d5 cd f0 f9 45 39 e7 0f 8d 20 ff ff ff e8 f7 c7 f0 f9 44 89 e3 e9 13 ff ff ff e8 ea c7 f0 f9 44 89 e0 44 89 e3 99 7c 24 04 29 d3 e9 fc fe ff ff e8 d3 c7 f0 f9 41 f7 dc bf 1f 00 RSP: 0018:ffffc9000314fac0 EFLAGS: 00010216 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000d7bc000 RDX: 0000000000000000 RSI: ffffffff87832e76 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff87832e14 R11: 0000000000000000 R12: 0000000000000000 R13: 1ffff92000629f5c R14: 0000000000000000 R15: 0000000000000000 FS: 00007f83e5085700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5218b2a000 CR3: 0000000012246000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400