From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- fs/nfs/nfs4sysctl.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 fs/nfs/nfs4sysctl.c (limited to 'fs/nfs/nfs4sysctl.c') diff --git a/fs/nfs/nfs4sysctl.c b/fs/nfs/nfs4sysctl.c new file mode 100644 index 000000000..d1a92d8f8 --- /dev/null +++ b/fs/nfs/nfs4sysctl.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * linux/fs/nfs/nfs4sysctl.c + * + * Sysctl interface to NFS v4 parameters + * + * Copyright (c) 2006 Trond Myklebust + */ +#include +#include + +#include "nfs4_fs.h" +#include "nfs4idmap.h" +#include "callback.h" + +static const int nfs_set_port_min; +static const int nfs_set_port_max = 65535; +static struct ctl_table_header *nfs4_callback_sysctl_table; + +static const struct ctl_table nfs4_cb_sysctls[] = { + { + .procname = "nfs_callback_tcpport", + .data = &nfs_callback_set_tcpport, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = (int *)&nfs_set_port_min, + .extra2 = (int *)&nfs_set_port_max, + }, + { + .procname = "idmap_cache_timeout", + .data = &nfs_idmap_cache_timeout, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec, + }, +}; + +int nfs4_register_sysctl(void) +{ + nfs4_callback_sysctl_table = register_sysctl("fs/nfs", + nfs4_cb_sysctls); + if (nfs4_callback_sysctl_table == NULL) + return -ENOMEM; + return 0; +} + +void nfs4_unregister_sysctl(void) +{ + unregister_sysctl_table(nfs4_callback_sysctl_table); + nfs4_callback_sysctl_table = NULL; +} -- cgit v1.3.1