From: syzbot <syzbot+a4cc4ac22daa4a71b87c@xxxxxxxxxxxxxxxxxxxxxxxxx> Date: Thu, 12 Jun 2025 14:08:31 -0700 > Hello, > > syzbot found the following issue on: > > HEAD commit: 2c4a1f3fe03e Merge tag 'bpf-fixes' of git://git.kernel.org.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=1432610c580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=c4c8362784bb7796 > dashboard link: https://syzkaller.appspot.com/bug?extid=a4cc4ac22daa4a71b87c > compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1126ed70580000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/cd1ec81a3ab8/disk-2c4a1f3f.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/992d9b6a25bf/vmlinux-2c4a1f3f.xz > kernel image: https://storage.googleapis.com/syzbot-assets/85a9bf583faa/bzImage-2c4a1f3f.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+a4cc4ac22daa4a71b87c@xxxxxxxxxxxxxxxxxxxxxxxxx > > WARNING: CPU: 0 PID: 6182 at fs/proc/generic.c:727 remove_proc_entry+0x45e/0x530 fs/proc/generic.c:727 > Modules linked in: > CPU: 0 UID: 0 PID: 6182 Comm: syz.1.75 Not tainted 6.16.0-rc1-syzkaller-00010-g2c4a1f3fe03e #0 PREEMPT(full) > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 > 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 40 ba a2 8b 48 c7 c7 60 b9 a2 8b e8 33 81 1d ff 90 <0f> 0b 90 90 e9 5f fe ff ff e8 04 69 5e ff 90 48 b8 00 00 00 00 00 > RSP: 0018:ffffc90003e5fb08 EFLAGS: 00010282 > RAX: 0000000000000000 RBX: ffff88804e6568c0 RCX: ffffffff817a92c8 > RDX: ffff88803046da00 RSI: ffffffff817a92d5 RDI: 0000000000000001 > RBP: ffff8880353bde80 R08: 0000000000000001 R09: 0000000000000000 > R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880353bddc0 > R13: ffff8880353bdea4 R14: ffff88802556cae4 R15: dffffc0000000000 > FS: 0000555562486500(0000) GS:ffff888124962000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000c0024fb070 CR3: 000000006b39a000 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 net/core/net_namespace.c:200 [inline] > ops_undo_list+0x2eb/0xab0 net/core/net_namespace.c:253 > setup_net+0x2e1/0x510 net/core/net_namespace.c:457 > copy_net_ns+0x2a6/0x5f0 net/core/net_namespace.c:574 > create_new_namespaces+0x3ea/0xa90 kernel/nsproxy.c:110 > unshare_nsproxy_namespaces+0xc0/0x1f0 kernel/nsproxy.c:218 > ksys_unshare+0x45b/0xa40 kernel/fork.c:3121 > __do_sys_unshare kernel/fork.c:3192 [inline] > __se_sys_unshare kernel/fork.c:3190 [inline] > __x64_sys_unshare+0x31/0x40 kernel/fork.c:3190 > do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f239858e929 > 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:00007ffd08ac9b18 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 > RAX: ffffffffffffffda RBX: 00007f23987b5fa0 RCX: 00007f239858e929 > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000080 > RBP: 00007f2398610b39 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 00007f23987b5fa0 R14: 00007f23987b5fa0 R15: 0000000000000001 > </TASK> > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want syzbot to run the reproducer, reply with: > #syz test: git://repo/address.git branch-or-commit-hash > If you attach or paste a git patch, syzbot will apply it before testing. #syz test diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 8ab7868807a7..19277e050c09 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -2589,15 +2589,26 @@ EXPORT_SYMBOL_GPL(nfs_net_id); static int nfs_net_init(struct net *net) { struct nfs_net *nn = net_generic(net, nfs_net_id); + int err; nfs_clients_init(net); if (!rpc_proc_register(net, &nn->rpcstats)) { - nfs_clients_exit(net); - return -ENOMEM; + goto err_proc_rpc; + err = -ENOMEM; } - return nfs_fs_proc_net_init(net); + err = nfs_fs_proc_net_init(net); + if (err) + goto err_proc_nfs; + + return 0; + +err_proc_nfs: + rpc_proc_unregister(net, "nfs"); +err_proc_rpc: + nfs_clients_exit(net); + return err; } static void nfs_net_exit(struct net *net)
