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 6bfb56e93bcef41859c2d5ab234ffd80b691be35 testing commit 6bfb56e93bcef41859c2d5ab234ffd80b691be35 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: cb0637a9b3f4fc52726714e90bccb83f6821b2da680777d5a23f98627ba8c9a3 run #0: crashed: WARNING in tcp_enter_loss run #1: crashed: WARNING in tcp_enter_loss run #2: crashed: WARNING in tcp_enter_loss run #3: crashed: WARNING in tcp_enter_loss run #4: crashed: WARNING in tcp_enter_loss run #5: boot failed: INFO: task hung in add_early_randomness run #6: boot failed: INFO: task hung in add_early_randomness run #7: boot failed: INFO: task hung in add_early_randomness run #8: boot failed: INFO: task hung in add_early_randomness run #9: boot failed: INFO: task hung in add_early_randomness revisions tested: 2, total time: 27m10.22068282s (build: 13m4.075088319s, test: 13m21.123524626s) the crash still happens on HEAD commit msg: cert host tools: Stop complaining about deprecated OpenSSL functions crash: WARNING in tcp_enter_loss ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4083 at net/ipv4/tcp_input.c:2131 tcp_enter_loss+0xbe6/0x1080 net/ipv4/tcp_input.c:2164 Modules linked in: CPU: 1 PID: 4083 Comm: syz-executor.0 Not tainted 5.19.0-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+0xbe6/0x1080 net/ipv4/tcp_input.c:2143 Code: b6 04 02 84 c0 74 08 3c 03 0f 8e c7 01 00 00 41 39 9e 58 09 00 00 41 0f 46 9e 58 09 00 00 41 89 9e 58 09 00 00 e9 63 fc ff ff <0f> 0b e9 24 f7 ff ff 48 89 df e8 5b e2 8b fa e9 9b f6 ff ff 48 89 RSP: 0018:ffffc90002d6fa00 EFLAGS: 00010212 RAX: 0000000000000008 RBX: ffff88807af50944 RCX: 0000000000000007 RDX: 0000000000000009 RSI: 0000000000000009 RDI: ffff88802386ca08 RBP: 0000000000000011 R08: 0000000000000000 R09: ffff88807af50067 R10: ffffed100f5ea00c R11: ffff88802386d680 R12: 0000000000000000 R13: ffff88807af509d8 R14: ffff88807af50000 R15: 0000000000000000 FS: 00007f4721be8700(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000021000000 CR3: 0000000079169000 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:1109 release_sock+0xa0/0x170 net/core/sock.c:3410 do_tcp_setsockopt net/ipv4/tcp.c:3665 [inline] tcp_setsockopt+0x55b/0x1f80 net/ipv4/tcp.c:3677 __sys_setsockopt+0x198/0x4f0 net/socket.c:2259 __do_sys_setsockopt net/socket.c:2270 [inline] __se_sys_setsockopt net/socket.c:2267 [inline] __x64_sys_setsockopt+0xb5/0x150 net/socket.c:2267 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+0x46/0xb0 RIP: 0033:0x7f4720a88e99 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:00007f4721be8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f4720b9c030 RCX: 00007f4720a88e99 RDX: 0000000000000016 RSI: 0000000000000006 RDI: 0000000000000003 RBP: 00007f4720ae2ff1 R08: 000000002000019f R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f47210cfb1f R14: 00007f4721be8300 R15: 0000000000022000