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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: nfsd: don't ignore the return code of svc_proc_register()
Patched on: [ci-upstream-linux-next-kasan-gce-root], missing 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-qemu2-riscv64 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-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb]
First crash: 50d, last: 16h58m
▶ ▼ 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 162d 196d 0/3 auto-obsoleted due to no activity on 2024/12/25 11:45
linux-6.1 WARNING in remove_proc_entry 145 162d 196d 0/3 auto-obsoleted due to no activity on 2024/12/25 12:24
upstream WARNING in remove_proc_entry (5) scsi C 158 741d 783d 22/28 fixed on 2023/06/08 14:41
upstream WARNING in remove_proc_entry (4) net 1 1214d 1214d 0/28 closed as invalid on 2021/12/14 20:02
linux-4.19 WARNING in remove_proc_entry C error 4 860d 882d 0/1 upstream: reported C repro on 2022/10/28 02:13
upstream WARNING in remove_proc_entry netfilter 1 2439d 2439d 0/28 closed as invalid on 2018/09/05 12:51
upstream WARNING in remove_proc_entry (3) nfs net 1 1353d 1349d 0/28 auto-closed as invalid on 2021/11/10 16:53
upstream WARNING in remove_proc_entry (2) net 6 2018d 2318d 0/28 auto-closed as invalid on 2020/01/15 15:54
upstream WARNING in remove_proc_entry (6) can C done 377 175d 204d 28/28 fixed on 2024/10/22 11:57

Sample crash report:
name 'nfsd'
WARNING: CPU: 0 PID: 52 at fs/proc/generic.c:721 remove_proc_entry+0x1d1/0x540 fs/proc/generic.c:721
Modules linked in:
CPU: 0 UID: 0 PID: 52 Comm: kworker/u8:3 Not tainted 6.14.0-rc7-syzkaller-00137-g5fc319360819 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: netns cleanup_net
RIP: 0010:remove_proc_entry+0x1d1/0x540 fs/proc/generic.c:721
Code: ff e8 33 d8 62 ff 48 c7 c7 80 94 41 8e e8 37 e3 00 09 e8 22 d8 62 ff 90 48 8b 74 24 18 48 c7 c7 c0 f9 81 8b e8 90 06 23 ff 90 <0f> 0b 90 90 e9 fa 00 00 00 e8 01 d8 62 ff 4d 85 e4 74 c4 e8 f7 d7
RSP: 0018:ffffc90000bd7a60 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff817a2269
RDX: ffff8881422c3c00 RSI: ffffffff817a2276 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88802db983c0
R13: 0000000000000004 R14: ffffffff8b8fa7a0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c008d48000 CR3: 0000000028194000 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
 cleanup_net+0x5c6/0xb30 net/core/net_namespace.c:652
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3400
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Crashes (389):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2025/03/27 10:28 upstream 1e1ba8d23dae 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/27 05:09 upstream 1e1ba8d23dae 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/27 03:30 upstream 1e1ba8d23dae 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/26 22:30 upstream 2df0c02dab82 19e40f48 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/26 06:53 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/26 01:16 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/25 20:44 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/24 21:37 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/24 17:06 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/24 13:35 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/24 01:55 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/24 00:12 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/23 17:49 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/23 07:13 upstream 183601b78a9b 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/23 03:19 upstream 183601b78a9b 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/22 23:27 upstream 183601b78a9b c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/22 11:07 upstream 88d324e69ea9 c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/22 09:35 upstream 88d324e69ea9 c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/22 09:09 upstream 88d324e69ea9 c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/22 06:17 upstream d07de43e3f05 c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/21 19:55 upstream d07de43e3f05 c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/21 13:23 upstream b3ee1e460951 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/21 09:51 upstream b3ee1e460951 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/21 08:29 upstream b3ee1e460951 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/21 02:37 upstream 5fc319360819 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/21 00:13 upstream 5fc319360819 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/20 19:02 upstream 5fc319360819 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/20 13:33 upstream a7f2e10ecd8f 9209bc22 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/20 06:22 upstream a7f2e10ecd8f 9209bc22 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/19 22:12 upstream a7f2e10ecd8f 3b7445cf .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/19 10:41 upstream 81e4f8d68c66 8d0a2921 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/19 07:54 upstream 81e4f8d68c66 8d0a2921 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/19 06:16 upstream 81e4f8d68c66 8d0a2921 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/18 18:33 upstream 76b6905c11fd 22a6c2b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/17 15:53 upstream 4701f33a1070 948c34e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/17 10:24 upstream 4701f33a1070 948c34e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/17 08:43 upstream 4701f33a1070 948c34e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/16 11:07 upstream eb88e6bfbc0a e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/16 08:44 upstream eb88e6bfbc0a e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/16 01:55 upstream eb88e6bfbc0a e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/15 22:22 upstream 3571e8b091f4 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/15 16:41 upstream 3571e8b091f4 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/15 00:18 upstream 83158b21ae9a e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/14 22:56 upstream 83158b21ae9a e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/14 16:11 upstream e3a854b577cb e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in remove_proc_entry
2025/03/14 15:01 upstream e3a854b577cb e2826670 .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.