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

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Message-ID: <0000000000009ccb26062057bb9a@google.com>
Date: Fri, 23 Aug 2024 04:04:02 -0700
From: syzbot <syzbot+8dbe3133b840c470da0e@...kaller.appspotmail.com>
To: hdanton@...a.com, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bpf?] [net?] WARNING in sock_map_close (2)

Hello,

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

------------[ cut here ]------------
WARNING: CPU: 0 PID: 6140 at net/core/sock_map.c:1699 sock_map_close+0x399/0x3d0 net/core/sock_map.c:1699
Modules linked in:
CPU: 0 UID: 0 PID: 6140 Comm: syz.0.15 Not tainted 6.11.0-rc3-syzkaller-00508-gd785ed945de6-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:sock_map_close+0x399/0x3d0 net/core/sock_map.c:1699
Code: 48 89 df e8 29 a4 5a f8 4c 8b 23 eb 05 e8 cf 5e f3 f7 e8 ba ea ff ff 4c 89 ef e8 c2 e1 da ff e9 47 ff ff ff e8 b8 5e f3 f7 90 <0f> 0b 90 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc
RSP: 0018:ffffc90003447cb0 EFLAGS: 00010293
RAX: ffffffff89a02ab8 RBX: ffffffff95312d30 RCX: ffff88802a959e00
RDX: 0000000000000000 RSI: ffffffff8c0ad560 RDI: ffffffff8c606900
RBP: 0000000000000000 R08: ffffffff937328e7 R09: 1ffffffff26e651c
R10: dffffc0000000000 R11: fffffbfff26e651d R12: ffffffff89a02720
R13: ffff88802026b000 R14: dffffc0000000000 R15: ffffffff89a02751
FS:  00005555867fa500(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000440 CR3: 000000004646a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inet_release+0x17d/0x200 net/ipv4/af_inet.c:437
 __sock_release net/socket.c:659 [inline]
 sock_close+0xbc/0x240 net/socket.c:1421
 __fput+0x24a/0x8a0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:228
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f75df579e79
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff8db960f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000001cc78 RCX: 00007f75df579e79
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fff8db961c8 R08: 0000000000000001 R09: 00007fff8db963df
R10: 00007f75df400000 R11: 0000000000000246 R12: 0000000000000032
R13: 00007fff8db961f0 R14: 00007fff8db96210 R15: ffffffffffffffff
 </TASK>


Tested on:

commit:         d785ed94 net: wwan: t7xx: PCIe reset rescan
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git
console output: https://syzkaller.appspot.com/x/log.txt?x=1046b239980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7229118d88b4a71b
dashboard link: https://syzkaller.appspot.com/bug?extid=8dbe3133b840c470da0e
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=10236b91980000