Add bpf_getxattr

index 0210f85131b3..ebd361c2e351 100644
@@ -5172,6 +5172,13 @@ union bpf_attr {
  * 	Return
  * 		Map value associated to *key* on *cpu*, or **NULL** if no entry
  * 		was found or *cpu* is invalid.
+ *
+ * long bpf_getxattr(struct user_namespace *mnt_userns, struct dentry *dentry, const char *name, void *value, u64 value_size)
+ *	Description
+ *		Get the *value* of the xattr with the given *name*
+ *		where *value_size* is the size of the *value* buffer.
+ *	Return
+ *		The number of bytes copied into *value*.
  */
 #define __BPF_FUNC_MAPPER(FN)		\
 	FN(unspec),			\

@@ -5370,6 +5377,7 @@ union bpf_attr {
 	FN(ima_file_hash),		\
 	FN(kptr_xchg),			\
 	FN(map_lookup_percpu_elem),     \
+	FN(getxattr),			\
 	/* */
 
 /* integer value in 'imm' field of BPF_CALL instruction selects which helper

index 7141ca8a1c2d..185adbb9b1b6 100644
@@ -20,6 +20,7 @@
 #include <linux/fprobe.h>
 #include <linux/bsearch.h>
 #include <linux/sort.h>
+#include <linux/xattr.h>
 
 #include <net/bpf_sk_storage.h>
 

@@ -1181,6 +1182,29 @@ static const struct bpf_func_proto bpf_get_func_arg_cnt_proto = {
 	.arg1_type	= ARG_PTR_TO_CTX,
 };
 
+BPF_CALL_5(bpf_getxattr, struct user_namespace *, mnt_userns, struct dentry *,
+	   dentry, void *, name, void *, value, size_t, value_size)
+{
+	return vfs_getxattr(mnt_userns, dentry, name, value, value_size);
+}
+
+BTF_ID_LIST(bpf_getxattr_btf_ids)
+BTF_ID(struct, user_namespace)
+BTF_ID(struct, dentry)
+
+static const struct bpf_func_proto bpf_getxattr_proto = {
+	.func = bpf_getxattr,
+	.gpl_only = false,
+	.ret_type = RET_INTEGER,
+	.arg1_type = ARG_PTR_TO_BTF_ID,
+	.arg1_btf_id = &bpf_getxattr_btf_ids[0],
+	.arg2_type = ARG_PTR_TO_BTF_ID,
+	.arg2_btf_id = &bpf_getxattr_btf_ids[1],
+	.arg3_type = ARG_PTR_TO_CONST_STR,
+	.arg4_type = ARG_PTR_TO_UNINIT_MEM,
+	.arg5_type = ARG_CONST_SIZE,
+};
+
 static const struct bpf_func_proto *
 bpf_tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 {

@@ -1304,6 +1328,8 @@ bpf_tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 		return &bpf_find_vma_proto;
 	case BPF_FUNC_trace_vprintk:
 		return bpf_get_trace_vprintk_proto();
+	case BPF_FUNC_getxattr:
+		return prog->aux->sleepable ? &bpf_getxattr_proto : NULL;
 	default:
 		return bpf_base_func_proto(func_id);
 	}

index 0210f85131b3..ebd361c2e351 100644
@@ -5172,6 +5172,13 @@ union bpf_attr {
  * 	Return
  * 		Map value associated to *key* on *cpu*, or **NULL** if no entry
  * 		was found or *cpu* is invalid.
+ *
+ * long bpf_getxattr(struct user_namespace *mnt_userns, struct dentry *dentry, const char *name, void *value, u64 value_size)
+ *	Description
+ *		Get the *value* of the xattr with the given *name*
+ *		where *value_size* is the size of the *value* buffer.
+ *	Return
+ *		The number of bytes copied into *value*.
  */
 #define __BPF_FUNC_MAPPER(FN)		\
 	FN(unspec),			\

@@ -5370,6 +5377,7 @@ union bpf_attr {
 	FN(ima_file_hash),		\
 	FN(kptr_xchg),			\
 	FN(map_lookup_percpu_elem),     \
+	FN(getxattr),			\
 	/* */
 
 /* integer value in 'imm' field of BPF_CALL instruction selects which helper

new file mode 100644
index 000000000000..442b6c1aed0e
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Copyright 2022 Google LLC.
+ */
+
+#include <test_progs.h>
+#include <sys/xattr.h>
+#include "xattr.skel.h"
+
+#define XATTR_NAME "security.bpf"
+#define XATTR_VALUE "test_progs"
+
+static unsigned int duration;
+
+void test_xattr(void)
+{
+	struct xattr *skel = NULL;
+	char tmp_dir_path[] = "/tmp/xattrXXXXXX";
+	char tmp_exec_path[64];
+	char cmd[256];
+	int err;
+
+	if (CHECK(!mkdtemp(tmp_dir_path), "mkdtemp",
+		  "unable to create tmpdir: %d\n", errno))
+		goto close_prog;
+
+	snprintf(tmp_exec_path, sizeof(tmp_exec_path), "%s/copy_of_ls",
+		 tmp_dir_path);
+	snprintf(cmd, sizeof(cmd), "cp /bin/ls %s", tmp_exec_path);
+	if (CHECK_FAIL(system(cmd)))
+		goto close_prog_rmdir;
+
+	if (CHECK(setxattr(tmp_exec_path, XATTR_NAME, XATTR_VALUE,
+			   sizeof(XATTR_VALUE), 0),
+		  "setxattr", "unable to setxattr: %d", errno))
+		goto close_prog_rmdir;
+
+	skel = xattr__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel_load"))
+		goto close_prog_rmdir;
+
+	err = xattr__attach(skel);
+	if (!ASSERT_OK(err, "xattr__attach failed"))
+		goto close_prog_rmdir;
+
+	snprintf(cmd, sizeof(cmd), "%s -l", tmp_exec_path);
+	if (CHECK_FAIL(system(cmd)))
+		goto close_prog_rmdir;
+
+	ASSERT_EQ(skel->bss->result, 1, "xattr result");
+
+close_prog_rmdir:
+	snprintf(cmd, sizeof(cmd), "rm -rf %s", tmp_dir_path);
+	system(cmd);
+close_prog:
+	xattr__destroy(skel);
+}

new file mode 100644
index 000000000000..3bf6966a7900
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Copyright 2022 Google LLC.
+ */
+
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+char _license[] SEC("license") = "GPL";
+
+#define XATTR_NAME "security.bpf"
+#define XATTR_VALUE "test_progs"
+
+__u64 result = 0;
+
+SEC("lsm.s/bprm_committed_creds")
+void BPF_PROG(bprm_cc, struct linux_binprm *bprm)
+{
+	struct task_struct *current = bpf_get_current_task_btf();
+	char dir_xattr_value[64];
+	int xattr_sz;
+
+	xattr_sz = bpf_getxattr(bprm->file->f_path.mnt->mnt_userns,
+				bprm->file->f_path.dentry, XATTR_NAME,
+				dir_xattr_value, 64);
+
+	if (xattr_sz <= 0)
+		return;
+
+	if (!bpf_strncmp(dir_xattr_value, sizeof(XATTR_VALUE), XATTR_VALUE))
+		result = 1;
+}