bisecting fixing commit since 75acfdb6fd922598a408a0d864486aeb167c1a97 building syzkaller on 6acc789ad3f6c04319764f414ebb1a08e6145332 testing commit 75acfdb6fd922598a408a0d864486aeb167c1a97 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 8d9695d825d8edfa3456b891165fd5d5a480955c0b2e28851dc414080478d9e1 all runs: crashed: WARNING in tcp_enter_loss testing current HEAD 3e732ebf7316ac83e8562db7e64cc68aec390a18 testing commit 3e732ebf7316ac83e8562db7e64cc68aec390a18 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 3eeb2d08e2cd3f83c067acac9c7a735b3dbf43d13d4965eb7ffef2d9d487f4a0 all runs: crashed: WARNING in tcp_enter_loss revisions tested: 2, total time: 19m26.24863153s (build: 12m3.930536574s, test: 6m35.003958048s) the crash still happens on HEAD commit msg: Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost crash: WARNING in tcp_enter_loss ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4655 at net/ipv4/tcp_input.c:2131 tcp_enter_loss+0xc68/0x1070 net/ipv4/tcp_input.c:2164 Modules linked in: CPU: 1 PID: 4655 Comm: syz-executor148 Not tainted 5.18.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:tcp_timeout_mark_lost net/ipv4/tcp_input.c:2131 [inline] RIP: 0010:tcp_enter_loss+0xc68/0x1070 net/ipv4/tcp_input.c:2143 Code: 46 ae 58 09 00 00 41 89 ae 58 09 00 00 e9 17 fc ff ff 49 8d 86 d8 0a 00 00 48 89 44 24 28 49 8d ae 74 08 00 00 e9 df f7 ff ff <0f> 0b e9 a5 f6 ff ff 48 8b 7c 24 28 e8 27 63 92 fa e9 ab fc ff ff RSP: 0018:ffffc900052df9f0 EFLAGS: 00010212 RAX: 0000000000000009 RBX: 0000000000000011 RCX: 0000000000000000 RDX: 0000000000000009 RSI: ffff888077544a00 RDI: ffff888077544008 RBP: ffff888018703400 R08: 0000000000000000 R09: ffff888022af6c67 R10: ffffed100455ed8c R11: ffff888018703400 R12: 0000000000000000 R13: ffff888022af7544 R14: ffff888022af6c00 R15: 0000000000000008 FS: 00007f7f9bd53700(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000021000000 CR3: 000000001c71f000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tcp_retransmit_timer+0x2082/0x3110 net/ipv4/tcp_timer.c:505 tcp_write_timer_handler+0x4d5/0x970 net/ipv4/tcp_timer.c:622 tcp_release_cb+0x1a2/0x270 net/ipv4/tcp_output.c:1106 release_sock+0xa0/0x170 net/core/sock.c:3333 do_tcp_setsockopt net/ipv4/tcp.c:3686 [inline] tcp_setsockopt+0x55b/0x1f80 net/ipv4/tcp.c:3698 __sys_setsockopt+0x198/0x4f0 net/socket.c:2180 __do_sys_setsockopt net/socket.c:2191 [inline] __se_sys_setsockopt net/socket.c:2188 [inline] __x64_sys_setsockopt+0xb5/0x150 net/socket.c:2188 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f7f9ba52079 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 15 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7f9bd532f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f7f9baf0030 RCX: 00007f7f9ba52079 RDX: 0000000000000016 RSI: 0000000000000006 RDI: 0000000000000003 RBP: 00007f7f9baf003c R08: 000000002000019f R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00007f7f9baa87d4 R13: 00007f7f9baa8570 R14: 0000000020000640 R15: 00007f7f9baf0038