syzbot


WARNING in remove_proc_entry (7)

Status: upstream: reported syz repro on 2025/02/06 08:38
Subsystems: nfs net
[Documentation on labels]
Reported-by: syzbot+e34ad04f27991521104c@syzkaller.appspotmail.com
First crash: 1d15h, last: 2h49m
Discussions (2)
Title Replies (including bot) Last reply
[syzbot] [nfs?] [net?] WARNING in remove_proc_entry (7) 2 (3) 2025/02/07 03:47
[PATCH] nfsd: don't ignore the return code of svc_proc_register() 5 (5) 2025/02/06 18:41
Similar bugs (9)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in remove_proc_entry origin:upstream C inconclusive 229 114d 148d 0/3 auto-obsoleted due to no activity on 2024/12/25 11:45
linux-6.1 WARNING in remove_proc_entry 145 114d 148d 0/3 auto-obsoleted due to no activity on 2024/12/25 12:24
upstream WARNING in remove_proc_entry (5) scsi C 158 693d 735d 22/28 fixed on 2023/06/08 14:41
upstream WARNING in remove_proc_entry (4) net 1 1166d 1166d 0/28 closed as invalid on 2021/12/14 20:02
linux-4.19 WARNING in remove_proc_entry C error 4 812d 833d 0/1 upstream: reported C repro on 2022/10/28 02:13
upstream WARNING in remove_proc_entry netfilter 1 2391d 2391d 0/28 closed as invalid on 2018/09/05 12:51
upstream WARNING in remove_proc_entry (3) nfs net 1 1305d 1301d 0/28 auto-closed as invalid on 2021/11/10 16:53
upstream WARNING in remove_proc_entry (2) net 6 1970d 2270d 0/28 auto-closed as invalid on 2020/01/15 15:54
upstream WARNING in remove_proc_entry (6) can C done 377 126d 156d 28/28 fixed on 2024/10/22 11:57

Sample crash report:
------------[ cut here ]------------
name 'nfsd'
WARNING: CPU: 0 PID: 6074 at fs/proc/generic.c:713 remove_proc_entry+0x268/0x470 fs/proc/generic.c:713
Modules linked in:
CPU: 0 UID: 0 PID: 6074 Comm: syz.2.18 Not tainted 6.14.0-rc1-syzkaller-00081-gbb066fe812d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:remove_proc_entry+0x268/0x470 fs/proc/generic.c:713
Code: 08 eb a2 e8 1a 9c 62 ff 48 c7 c7 20 7e 41 8e e8 4e d4 f2 08 e8 09 9c 62 ff 90 48 c7 c7 c0 db 81 8b 4c 89 e6 e8 29 76 23 ff 90 <0f> 0b 90 90 e9 72 ff ff ff e8 ea 9b 62 ff 49 8d be 98 00 00 00 48
RSP: 0018:ffffc90003087b90 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 1ffff92000610f74 RCX: ffffffff8179c889
RDX: ffff8880272cda00 RSI: ffffffff8179c896 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff8b8f7460
R13: dffffc0000000000 R14: ffff888034873000 R15: fffffbfff1cb7dc4
FS:  00007fc5883f96c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa09f1fdf98 CR3: 0000000078050000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nfsd_net_exit+0x27/0x50 fs/nfsd/nfsctl.c:2259
 ops_exit_list+0xb0/0x180 net/core/net_namespace.c:172
 setup_net+0x4fe/0x860 net/core/net_namespace.c:394
 copy_net_ns+0x2b4/0x6c0 net/core/net_namespace.c:516
 create_new_namespaces+0x3ea/0xad0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xc0/0x1f0 kernel/nsproxy.c:228
 ksys_unshare+0x45d/0xa40 kernel/fork.c:3342
 __do_sys_unshare kernel/fork.c:3413 [inline]
 __se_sys_unshare kernel/fork.c:3411 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:3411
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc58858cde9
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:00007fc5883f9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007fc5887a5fa0 RCX: 00007fc58858cde9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000080
RBP: 00007fc58860e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc5887a5fa0 R15: 00007ffdd9164708
 </TASK>

Crashes (22):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/07 16:13 upstream bb066fe812d6 a4f327c2 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/07 15:35 upstream bb066fe812d6 a4f327c2 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/07 15:02 upstream bb066fe812d6 a4f327c2 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/07 07:56 upstream bb066fe812d6 53657d1b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/07 06:25 upstream bb066fe812d6 53657d1b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/06 11:40 upstream 92514ef226f5 1e1faf27 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/06 09:06 upstream 92514ef226f5 577d049b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/06 08:22 upstream 92514ef226f5 577d049b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/07 14:29 upstream bb066fe812d6 a4f327c2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/07 14:26 upstream bb066fe812d6 a4f327c2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/07 14:26 upstream bb066fe812d6 a4f327c2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/07 09:19 upstream bb066fe812d6 53657d1b .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/07 06:16 upstream bb066fe812d6 53657d1b .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/07 05:47 upstream bb066fe812d6 53657d1b .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/06 10:36 upstream 92514ef226f5 1e1faf27 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/06 09:05 upstream 92514ef226f5 577d049b .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/06 03:28 upstream 92514ef226f5 577d049b .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/06 03:24 upstream 92514ef226f5 577d049b .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/06 03:21 upstream 92514ef226f5 577d049b .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/06 03:15 upstream 92514ef226f5 577d049b .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/06 03:14 upstream 92514ef226f5 577d049b .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/06 03:12 upstream 92514ef226f5 577d049b .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
* Struck through repros no longer work on HEAD.