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: a8d7b3bd207a1ca2264a52c2d614f0dad26688aeceb7ffef63e3ee1421f77c8b all runs: crashed: WARNING in tcp_enter_loss testing current HEAD 72a8e05d4f66b5af7854df4490e3135168694b6b testing commit 72a8e05d4f66b5af7854df4490e3135168694b6b compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: ae586e84875bbe8868328d218b3caa2faca19232a1ec6918bfc4489adac5b708 all runs: crashed: WARNING in tcp_enter_loss revisions tested: 2, total time: 23m32.331514393s (build: 12m52.84739816s, test: 9m44.814980659s) the crash still happens on HEAD commit msg: Merge tag 'ovl-fixes-5.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs crash: WARNING in tcp_enter_loss ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4077 at net/ipv4/tcp_input.c:2131 tcp_enter_loss+0xbe6/0x1080 net/ipv4/tcp_input.c:2164 Modules linked in: CPU: 0 PID: 4077 Comm: syz-executor.0 Not tainted 5.19.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 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 40 09 00 00 41 0f 46 9e 40 09 00 00 41 89 9e 40 09 00 00 e9 63 fc ff ff <0f> 0b e9 24 f7 ff ff 48 89 df e8 bb c2 8b fa e9 9b f6 ff ff 48 89 RSP: 0018:ffffc90002cffa00 EFLAGS: 00010212 RAX: 0000000000000008 RBX: ffff888023f9952c RCX: 0000000000000007 RDX: 0000000000000009 RSI: 0000000000000009 RDI: ffff888078488288 RBP: 0000000000000011 R08: 0000000000000000 R09: ffff888023f98c67 R10: ffffed10047f318c R11: ffff88802529c780 R12: 0000000000000000 R13: ffff888023f995c0 R14: ffff888023f98c00 R15: 0000000000000000 FS: 00007fb8af7fe700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000021000000 CR3: 000000001de13000 CR4: 00000000003506f0 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:2254 __do_sys_setsockopt net/socket.c:2265 [inline] __se_sys_setsockopt net/socket.c:2262 [inline] __x64_sys_setsockopt+0xb5/0x150 net/socket.c:2262 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+0x63/0xcd RIP: 0033:0x7fb8b0088e99 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:00007fb8af7fe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fb8b019c030 RCX: 00007fb8b0088e99 RDX: 0000000000000016 RSI: 0000000000000006 RDI: 0000000000000003 RBP: 00007fb8b00e2ff1 R08: 000000002000019f R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb8b06cfb1f R14: 00007fb8af7fe300 R15: 0000000000022000