syzbot


WARNING in remove_proc_entry (7)

Status: upstream: reported syz repro on 2025/02/06 08:38
Subsystems: nfs
[Documentation on labels]
Reported-by: syzbot+e34ad04f27991521104c@syzkaller.appspotmail.com
Fix commit: 930b64ca0c51 nfsd: don't ignore the return code of svc_proc_register()
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 95d, last: 2h50m
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 207d 241d 0/3 auto-obsoleted due to no activity on 2024/12/25 11:45
linux-6.1 WARNING in remove_proc_entry 145 207d 241d 0/3 auto-obsoleted due to no activity on 2024/12/25 12:24
upstream WARNING in remove_proc_entry (5) scsi C 158 786d 828d 22/28 fixed on 2023/06/08 14:41
upstream WARNING in remove_proc_entry (4) net 1 1259d 1259d 0/28 closed as invalid on 2021/12/14 20:02
linux-4.19 WARNING in remove_proc_entry C error 4 905d 927d 0/1 upstream: reported C repro on 2022/10/28 02:13
upstream WARNING in remove_proc_entry netfilter 1 2484d 2484d 0/28 closed as invalid on 2018/09/05 12:51
upstream WARNING in remove_proc_entry (3) nfs net 1 1398d 1394d 0/28 auto-closed as invalid on 2021/11/10 16:53
upstream WARNING in remove_proc_entry (2) net 6 2063d 2363d 0/28 auto-closed as invalid on 2020/01/15 15:54
upstream WARNING in remove_proc_entry (6) can C done 377 220d 249d 28/28 fixed on 2024/10/22 11:57

Sample crash report:
------------[ cut here ]------------
remove_proc_entry: removing non-empty directory 'net/rpc', leaking at least 'nfs'
WARNING: CPU: 0 PID: 6032 at fs/proc/generic.c:727 remove_proc_entry+0x45e/0x530 fs/proc/generic.c:727
Modules linked in:

CPU: 0 UID: 0 PID: 6032 Comm: syz.0.16 Not tainted 6.15.0-rc4-syzkaller-00052-g4f79eaa2ceac #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:remove_proc_entry+0x45e/0x530 fs/proc/generic.c:727
Code: 3c 02 00 0f 85 85 00 00 00 48 8b 93 d8 00 00 00 4d 89 f0 4c 89 e9 48 c7 c6 c0 6b a2 8b 48 c7 c7 e0 6a a2 8b e8 83 f7 1f ff 90 <0f> 0b 90 90 e9 5f fe ff ff e8 64 16 60 ff 90 48 b8 00 00 00 00 00
RSP: 0018:ffffc900031a7b70 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff88807f98a780 RCX: ffffffff817a8f78
RDX: ffff8880269d5a00 RSI: ffffffff817a8f85 RDI: 0000000000000001
RBP: ffff88807d761480 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88807d7613c0
R13: ffff88807d7614a4 R14: ffff88807d761c24 R15: dffffc0000000000
FS:  00007f2d555c96c0(0000) GS:ffff8881249ed000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f67837ddd58 CR3: 0000000079178000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 sunrpc_exit_net+0x46/0x90 net/sunrpc/sunrpc_syms.c:76
 ops_exit_list+0xb0/0x180 net/core/net_namespace.c:172
 setup_net+0x4e8/0x850 net/core/net_namespace.c:396
 copy_net_ns+0x2a6/0x5f0 net/core/net_namespace.c:518
 create_new_namespaces+0x3ea/0xad0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xc0/0x1f0 kernel/nsproxy.c:228
 ksys_unshare+0x45b/0xa40 kernel/fork.c:3375
 __do_sys_unshare kernel/fork.c:3446 [inline]
 __se_sys_unshare kernel/fork.c:3444 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:3444
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2d5478e969
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:00007f2d555c9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f2d549b6080 RCX: 00007f2d5478e969
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000080
RBP: 00007f2d54810ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2d549b6080 R15: 00007fff2084ba88
 </TASK>

Crashes (593):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/01 17:49 upstream 4f79eaa2ceac 51b137cd .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/20 21:55 upstream 5fc319360819 62330552 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/11 05:31 upstream febbc555cf0f 43f51a00 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/10 03:08 upstream 69b54314c975 ef44b750 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/09 01:30 upstream 8f6629c004b1 ef44b750 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/02/07 21:33 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 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
2025/05/12 01:35 upstream cd802e7e5f1e 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/11 20:54 upstream cd802e7e5f1e 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/11 12:38 upstream 3ce9925823c7 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/11 02:13 upstream 3ce9925823c7 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/10 19:44 upstream 1a33418a69cc 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/10 12:34 upstream 1a33418a69cc 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/09 10:13 upstream 9c69f8884904 43803998 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/08 18:46 upstream 2c89c1b655c0 bb813bcc .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/08 14:39 upstream d76bb1ebb558 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/08 08:22 upstream d76bb1ebb558 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/08 03:48 upstream 707df3375124 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/08 02:46 upstream 707df3375124 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/06 23:04 upstream 0d8d44db295c 350f4ffc .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/05 05:18 upstream 92a09c47464d b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/04 22:34 upstream e8ab83e34bdc b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/04 18:38 upstream e8ab83e34bdc b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/03 23:43 upstream 95d3481af6dc b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/03 21:09 upstream 95d3481af6dc b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/03 18:22 upstream 95d3481af6dc b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/03 16:32 upstream 95d3481af6dc b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/02 08:17 upstream ebd297a2affa 51b137cd .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/02 02:47 upstream 4f79eaa2ceac 51b137cd .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/01 22:55 upstream 4f79eaa2ceac 51b137cd .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/01 20:05 upstream 4f79eaa2ceac 51b137cd .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/01 10:16 upstream 7a13c14ee59d ce7952f4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/01 02:46 upstream 7a13c14ee59d ce7952f4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/05/01 00:38 upstream b6ea1680d0ac 937aafd7 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/30 17:45 upstream b6ea1680d0ac 937aafd7 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/28 16:33 upstream b4432656b36e c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/28 05:19 upstream b4432656b36e c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/27 21:41 upstream 5bc1018675ec c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/27 18:10 upstream 5bc1018675ec c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/26 20:30 upstream f1a3944c860b c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/26 02:46 upstream c3137514f1f1 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/26 01:44 upstream c3137514f1f1 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/25 18:17 upstream 02ddfb981de8 dea5c7e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/25 07:36 upstream e72e9e693307 e3715315 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/25 04:56 upstream e72e9e693307 e3715315 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/24 04:32 upstream a79be02bba5c 9882047a .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/23 06:46 upstream bc3372351d0c 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/23 01:23 upstream bc3372351d0c 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/22 18:14 upstream a33b5a08cbbd 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/22 11:26 upstream a33b5a08cbbd 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/21 09:46 upstream 9d7a0577c9db 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/21 09:45 upstream 9d7a0577c9db 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/20 00:04 upstream 8560697b23dc 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/19 16:43 upstream 8560697b23dc 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/19 08:32 upstream 3088d26962e8 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/19 06:46 upstream 3088d26962e8 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/04/18 22:17 upstream fc96b232f8e7 2a20f901 .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.