disable pwm7

hc

2024-05-10 23fa18eaa71266feff7ba8d83022d9e1cc83c65a

 kernel/fs/binfmt_misc.c
..
..
@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
1
2
 /*
2
3
  * binfmt_misc.c
3
4
  *
..
..
@@ -22,6 +23,7 @@
22
23
 #include <linux/pagemap.h>
23
24
 #include <linux/namei.h>
24
25
 #include <linux/mount.h>
26
+#include <linux/fs_context.h>
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27
 #include <linux/syscalls.h>
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28
 #include <linux/fs.h>
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29
 #include <linux/uaccess.h>
..
..
@@ -42,10 +44,10 @@
42
44
 static int enabled = 1;
43
45
 
44
46
 enum {Enabled, Magic};
45
-#define MISC_FMT_PRESERVE_ARGV0 (1 << 31)
46
-#define MISC_FMT_OPEN_BINARY (1 << 30)
47
-#define MISC_FMT_CREDENTIALS (1 << 29)
48
-#define MISC_FMT_OPEN_FILE (1 << 28)
47
+#define MISC_FMT_PRESERVE_ARGV0 (1UL << 31)
48
+#define MISC_FMT_OPEN_BINARY (1UL << 30)
49
+#define MISC_FMT_CREDENTIALS (1UL << 29)
50
+#define MISC_FMT_OPEN_FILE (1UL << 28)
49
51
 
50
52
 typedef struct {
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53
 	struct list_head list;
..
..
@@ -132,7 +134,6 @@
132
134
 	Node *fmt;
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 	struct file *interp_file = NULL;
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 	int retval;
135
-	int fd_binary = -1;
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137
 
137
138
 	retval = -ENOEXEC;
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139
 	if (!enabled)
..
..
@@ -158,51 +159,25 @@
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159
 			goto ret;
159
160
 	}
160
161
 
161
-	if (fmt->flags & MISC_FMT_OPEN_BINARY) {
162
+	if (fmt->flags & MISC_FMT_OPEN_BINARY)
163
+		bprm->have_execfd = 1;
162
164
 
163
-		/* if the binary should be opened on behalf of the
164
-		 * interpreter than keep it open and assign descriptor
165
-		 * to it
166
-		 */
167
-		fd_binary = get_unused_fd_flags(0);
168
-		if (fd_binary < 0) {
169
-			retval = fd_binary;
170
-			goto ret;
171
-		}
172
-		fd_install(fd_binary, bprm->file);
173
-
174
-		/* if the binary is not readable than enforce mm->dumpable=0
175
-		   regardless of the interpreter's permissions */
176
-		would_dump(bprm, bprm->file);
177
-
178
-		allow_write_access(bprm->file);
179
-		bprm->file = NULL;
180
-
181
-		/* mark the bprm that fd should be passed to interp */
182
-		bprm->interp_flags |= BINPRM_FLAGS_EXECFD;
183
-		bprm->interp_data = fd_binary;
184
-
185
-	} else {
186
-		allow_write_access(bprm->file);
187
-		fput(bprm->file);
188
-		bprm->file = NULL;
189
-	}
190
165
 	/* make argv[1] be the path to the binary */
191
-	retval = copy_strings_kernel(1, &bprm->interp, bprm);
166
+	retval = copy_string_kernel(bprm->interp, bprm);
192
167
 	if (retval < 0)
193
-		goto error;
168
+		goto ret;
194
169
 	bprm->argc++;
195
170
 
196
171
 	/* add the interp as argv[0] */
197
-	retval = copy_strings_kernel(1, &fmt->interpreter, bprm);
172
+	retval = copy_string_kernel(fmt->interpreter, bprm);
198
173
 	if (retval < 0)
199
-		goto error;
174
+		goto ret;
200
175
 	bprm->argc++;
201
176
 
202
177
 	/* Update interp in case binfmt_script needs it. */
203
178
 	retval = bprm_change_interp(fmt->interpreter, bprm);
204
179
 	if (retval < 0)
205
-		goto error;
180
+		goto ret;
206
181
 
207
182
 	if (fmt->flags & MISC_FMT_OPEN_FILE) {
208
183
 		interp_file = file_clone_open(fmt->interp_file);
..
..
@@ -213,38 +188,16 @@
213
188
 	}
214
189
 	retval = PTR_ERR(interp_file);
215
190
 	if (IS_ERR(interp_file))
216
-		goto error;
191
+		goto ret;
217
192
 
218
-	bprm->file = interp_file;
219
-	if (fmt->flags & MISC_FMT_CREDENTIALS) {
220
-		loff_t pos = 0;
193
+	bprm->interpreter = interp_file;
194
+	if (fmt->flags & MISC_FMT_CREDENTIALS)
195
+		bprm->execfd_creds = 1;
221
196
 
222
-		/*
223
-		 * No need to call prepare_binprm(), it's already been
224
-		 * done.  bprm->buf is stale, update from interp_file.
225
-		 */
226
-		memset(bprm->buf, 0, BINPRM_BUF_SIZE);
227
-		retval = kernel_read(bprm->file, bprm->buf, BINPRM_BUF_SIZE,
228
-				&pos);
229
-	} else
230
-		retval = prepare_binprm(bprm);
231
-
232
-	if (retval < 0)
233
-		goto error;
234
-
235
-	retval = search_binary_handler(bprm);
236
-	if (retval < 0)
237
-		goto error;
238
-
197
+	retval = 0;
239
198
 ret:
240
199
 	dput(fmt->dentry);
241
200
 	return retval;
242
-error:
243
-	if (fd_binary > 0)
244
-		ksys_close(fd_binary);
245
-	bprm->interp_flags = 0;
246
-	bprm->interp_data = 0;
247
-	goto ret;
248
201
 }
249
202
 
250
203
 /* Command parsers */
..
..
@@ -819,7 +772,7 @@
819
772
 	.evict_inode	= bm_evict_inode,
820
773
 };
821
774
 
822
-static int bm_fill_super(struct super_block *sb, void *data, int silent)
775
+static int bm_fill_super(struct super_block *sb, struct fs_context *fc)
823
776
 {
824
777
 	int err;
825
778
 	static const struct tree_descr bm_files[] = {
..
..
@@ -834,10 +787,19 @@
834
787
 	return err;
835
788
 }
836
789
 
837
-static struct dentry *bm_mount(struct file_system_type *fs_type,
838
-	int flags, const char *dev_name, void *data)
790
+static int bm_get_tree(struct fs_context *fc)
839
791
 {
840
-	return mount_single(fs_type, flags, data, bm_fill_super);
792
+	return get_tree_single(fc, bm_fill_super);
793
+}
794
+
795
+static const struct fs_context_operations bm_context_ops = {
796
+	.get_tree	= bm_get_tree,
797
+};
798
+
799
+static int bm_init_fs_context(struct fs_context *fc)
800
+{
801
+	fc->ops = &bm_context_ops;
802
+	return 0;
841
803
 }
842
804
 
843
805
 static struct linux_binfmt misc_format = {
..
..
@@ -848,7 +810,7 @@
848
810
 static struct file_system_type bm_fs_type = {
849
811
 	.owner		= THIS_MODULE,
850
812
 	.name		= "binfmt_misc",
851
-	.mount		= bm_mount,
813
+	.init_fs_context = bm_init_fs_context,
852
814
 	.kill_sb	= kill_litter_super,
853
815
 };
854
816
 MODULE_ALIAS_FS("binfmt_misc");
..
..
@@ -870,3 +832,4 @@
870
832
 core_initcall(init_misc_binfmt);
871
833
 module_exit(exit_misc_binfmt);
872
834
 MODULE_LICENSE("GPL");
835
+MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);