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/proc/fd.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 fs/proc/fd.h (limited to 'fs/proc/fd.h') diff --git a/fs/proc/fd.h b/fs/proc/fd.h new file mode 100644 index 000000000..7e7265f7e --- /dev/null +++ b/fs/proc/fd.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __PROCFS_FD_H__ +#define __PROCFS_FD_H__ + +#include + +extern const struct file_operations proc_fd_operations; +extern const struct inode_operations proc_fd_inode_operations; + +extern const struct file_operations proc_fdinfo_operations; +extern const struct inode_operations proc_fdinfo_inode_operations; + +extern int proc_fd_permission(struct mnt_idmap *idmap, + struct inode *inode, int mask); + +static inline unsigned int proc_fd(struct inode *inode) +{ + return PROC_I(inode)->fd; +} + +#endif /* __PROCFS_FD_H__ */ -- cgit v1.3.1