linux-kernel - Re: [syzbot] [net?] WARNING in inet_csk_get

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Date: Sun, 26 May 2024 17:19:02 -0700
From: syzbot <syzbot+2459c1b9fcd39be822b1@...kaller.appspotmail.com>
To: hdanton@...a.com, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [net?] WARNING in inet_csk_get_port (3)

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in inet_csk_get_port

------------[ cut here ]------------
WARNING: CPU: 1 PID: 5606 at net/ipv4/inet_connection_sock.c:595 inet_csk_get_port+0xfae/0x2520 net/ipv4/inet_connection_sock.c:595
Modules linked in:
CPU: 1 PID: 5606 Comm: syz-executor.4 Not tainted 6.9.0-rc4-syzkaller-00266-g977b1ef51866-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:inet_csk_get_port+0xfae/0x2520 net/ipv4/inet_connection_sock.c:595
Code: 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 63 13 00 00 48 8b 83 40 06 00 00 48 89 44 24 20 e9 95 f2 ff ff e8 93 13 4b f8 90 <0f> 0b 90 e9 10 f9 ff ff e8 85 13 4b f8 49 8d 7f 48 e8 5c c5 5d 00
RSP: 0018:ffffc9000388fd38 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88805c420698 RCX: ffffffff89429509
RDX: ffff88802b24bc00 RSI: ffffffff8942aebd RDI: ffff88805c4206a0
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000004e20
R13: ffff888025057000 R14: ffff88805c420000 R15: ffff88802b92d800
FS:  00007f9e62e756c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f86bdade048 CR3: 000000002c8ba000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inet_csk_listen_start+0x15e/0x390 net/ipv4/inet_connection_sock.c:1281
 inet_dccp_listen+0x1c5/0x220 net/dccp/proto.c:951
 __sys_listen+0x19b/0x280 net/socket.c:1881
 __do_sys_listen net/socket.c:1890 [inline]
 __se_sys_listen net/socket.c:1888 [inline]
 __x64_sys_listen+0x53/0x80 net/socket.c:1888
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9e6207dea9
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:00007f9e62e750c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000032
RAX: ffffffffffffffda RBX: 00007f9e621abf80 RCX: 00007f9e6207dea9
RDX: 0000000000000000 RSI: 0000000020000005 RDI: 0000000000000003
RBP: 00007f9e620ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f9e621abf80 R15: 00007ffc65e51748
 </TASK>


Tested on:

commit:         977b1ef5 Merge tag 'block-6.9-20240420' of git://git.k..
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=106b1344980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=85dbe39cf8e4f599
dashboard link: https://syzkaller.appspot.com/bug?extid=2459c1b9fcd39be822b1
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=15314d92980000