WARNING in remove_proc_entry (2)

Status: auto-closed as invalid on 2020/01/15 15:54
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+46d1fec9e51890edb1a6@syzkaller.appspotmail.com
First crash: 2815d, last: 2515d
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
Reminder: 99 open syzbot bugs in net subsystem 14 (14) 2019/07/31 15:13
Reminder: 94 open syzbot bugs in net subsystem 1 (1) 2019/06/25 05:48
WARNING in remove_proc_entry (2) 0 (1) 2018/11/21 17:52
▶ ▼ Similar bugs (10)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in remove_proc_entry (7) nfs -1 syz 682 422d 546d 28/29 fixed on 2025/06/10 16:19
linux-5.15 WARNING in remove_proc_entry origin:upstream -1 syz, C inconclusive 229 659d 693d 0/3 auto-obsoleted due to no activity on 2024/12/25 11:45
upstream WARNING in remove_proc_entry (8) net nfs -1 syz 76 369d 419d 29/29 fixed on 2025/09/04 16:57
linux-6.1 WARNING in remove_proc_entry -1 145 659d 693d 0/3 auto-obsoleted due to no activity on 2024/12/25 12:24
upstream WARNING in remove_proc_entry (5) scsi -1 syz, C 158 1238d 1280d 22/29 fixed on 2023/06/08 14:41
upstream WARNING in remove_proc_entry (4) net -1 1 1711d 1711d 0/29 closed as invalid on 2021/12/14 20:02
linux-4.19 WARNING in remove_proc_entry -1 syz, C error 4 1356d 1378d 0/1 upstream: reported C repro on 2022/10/28 02:13
upstream WARNING in remove_proc_entry netfilter -1 1 2936d 2936d 0/29 closed as invalid on 2018/09/05 12:51
upstream WARNING in remove_proc_entry (3) nfs net -1 1 1850d 1845d 0/29 auto-closed as invalid on 2021/11/10 16:53
upstream WARNING in remove_proc_entry (6) can -1 syz, C done 377 671d 701d 28/29 fixed on 2024/10/22 11:57

Sample crash report:
device bond_slave_1 left promiscuous mode
bond0 (unregistering): (slave batadv0): Releasing backup interface
device batadv0 left promiscuous mode
bond0 (unregistering): Released all slaves
------------[ cut here ]------------
remove_proc_entry: removing non-empty directory 'net/bonding', leaking at least 'bond0'
WARNING: CPU: 0 PID: 19827 at fs/proc/generic.c:682 remove_proc_entry+0x367/0x410 fs/proc/generic.c:682
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 19827 Comm: kworker/u4:0 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2dc/0x755 kernel/panic.c:219
 __warn.cold+0x20/0x4c kernel/panic.c:576
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:remove_proc_entry+0x367/0x410 fs/proc/generic.c:682
Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4c 49 8b 95 d0 00 00 00 48 c7 c6 40 11 99 87 48 c7 c7 c0 10 99 87 e8 f1 ca 6a ff <0f> 0b e9 4b fe ff ff e8 bd ab d3 ff e9 b5 fd ff ff e8 73 ac d3 ff
RSP: 0018:ffff888096ad7a80 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 1ffff11012d5af52 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815c6326 RDI: ffffed1012d5af42
RBP: ffff888096ad7b30 R08: ffff88809af44100 R09: ffffed1015d060d1
R10: ffffed1015d060d0 R11: ffff8880ae830687 R12: ffff8880611fd540
R13: ffff888087f73700 R14: ffff8880611fd5f0 R15: ffff88808f2a14b8
 bond_destroy_proc_dir+0x87/0xdd drivers/net/bonding/bond_procfs.c:309
 bond_net_exit+0x2be/0x430 drivers/net/bonding/bond_main.c:4867
 ops_exit_list.isra.0+0xaa/0x150 net/core/net_namespace.c:172
 cleanup_net+0x4e2/0xa60 net/core/net_namespace.c:594
 process_one_work+0x9af/0x1740 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/09/17 15:53 upstream ad062195731b 13dcda9b .config console log report ci-upstream-kasan-gce
2019/04/24 18:06 upstream ba25b50d582f 8e3c52b1 .config console log report ci-upstream-kasan-gce-root
2019/03/16 09:12 upstream 6c83d0d5eb62 bab43553 .config console log report ci-upstream-kasan-gce
2018/11/21 14:54 upstream c8ce94b8fe53 5d9a3924 .config console log report ci-upstream-kasan-gce
2018/12/07 05:12 net-next-old fdb8b298676a dcf836b1 .config console log report ci-upstream-net-kasan-gce
2019/02/11 00:17 linux-next a46228f6598a b4f792e4 .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.