add wifi6 8852be driver

hc

2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da

 kernel/fs/binfmt_flat.c
..
..
@@ -42,6 +42,11 @@
42
42
 #include <asm/unaligned.h>
43
43
 #include <asm/cacheflush.h>
44
44
 #include <asm/page.h>
45
+#include <asm/flat.h>
46
+
47
+#ifndef flat_get_relocate_addr
48
+#define flat_get_relocate_addr(rel)	(rel)
49
+#endif
45
50
 
46
51
 /****************************************************************************/
47
52
 
..
..
@@ -62,6 +67,12 @@
62
67
 
63
68
 #define RELOC_FAILED 0xff00ff01		/* Relocation incorrect somewhere */
64
69
 #define UNLOADED_LIB 0x7ff000ff		/* Placeholder for unused library */
70
+
71
+#ifdef CONFIG_BINFMT_SHARED_FLAT
72
+#define	MAX_SHARED_LIBS			(4)
73
+#else
74
+#define	MAX_SHARED_LIBS			(1)
75
+#endif
65
76
 
66
77
 struct lib_info {
67
78
 	struct {
..
..
@@ -120,41 +131,47 @@
120
131
 
121
132
 	sp -= bprm->envc + 1;
122
133
 	sp -= bprm->argc + 1;
123
-	sp -= flat_argvp_envp_on_stack() ? 2 : 0;
134
+	if (IS_ENABLED(CONFIG_BINFMT_FLAT_ARGVP_ENVP_ON_STACK))
135
+		sp -= 2; /* argvp + envp */
124
136
 	sp -= 1;  /* &argc */
125
137
 
126
138
 	current->mm->start_stack = (unsigned long)sp & -FLAT_STACK_ALIGN;
127
139
 	sp = (unsigned long __user *)current->mm->start_stack;
128
140
 
129
-	__put_user(bprm->argc, sp++);
130
-	if (flat_argvp_envp_on_stack()) {
141
+	if (put_user(bprm->argc, sp++))
142
+		return -EFAULT;
143
+	if (IS_ENABLED(CONFIG_BINFMT_FLAT_ARGVP_ENVP_ON_STACK)) {
131
144
 		unsigned long argv, envp;
132
145
 		argv = (unsigned long)(sp + 2);
133
146
 		envp = (unsigned long)(sp + 2 + bprm->argc + 1);
134
-		__put_user(argv, sp++);
135
-		__put_user(envp, sp++);
147
+		if (put_user(argv, sp++) || put_user(envp, sp++))
148
+			return -EFAULT;
136
149
 	}
137
150
 
138
151
 	current->mm->arg_start = (unsigned long)p;
139
152
 	for (i = bprm->argc; i > 0; i--) {
140
-		__put_user((unsigned long)p, sp++);
153
+		if (put_user((unsigned long)p, sp++))
154
+			return -EFAULT;
141
155
 		len = strnlen_user(p, MAX_ARG_STRLEN);
142
156
 		if (!len || len > MAX_ARG_STRLEN)
143
157
 			return -EINVAL;
144
158
 		p += len;
145
159
 	}
146
-	__put_user(0, sp++);
160
+	if (put_user(0, sp++))
161
+		return -EFAULT;
147
162
 	current->mm->arg_end = (unsigned long)p;
148
163
 
149
164
 	current->mm->env_start = (unsigned long) p;
150
165
 	for (i = bprm->envc; i > 0; i--) {
151
-		__put_user((unsigned long)p, sp++);
166
+		if (put_user((unsigned long)p, sp++))
167
+			return -EFAULT;
152
168
 		len = strnlen_user(p, MAX_ARG_STRLEN);
153
169
 		if (!len || len > MAX_ARG_STRLEN)
154
170
 			return -EINVAL;
155
171
 		p += len;
156
172
 	}
157
-	__put_user(0, sp++);
173
+	if (put_user(0, sp++))
174
+		return -EFAULT;
158
175
 	current->mm->env_end = (unsigned long)p;
159
176
 
160
177
 	return 0;
..
..
@@ -345,7 +362,7 @@
345
362
 	start_code = p->lib_list[id].start_code;
346
363
 	text_len = p->lib_list[id].text_len;
347
364
 
348
-	if (!flat_reloc_valid(r, start_brk - start_data + text_len)) {
365
+	if (r > start_brk - start_data + text_len) {
349
366
 		pr_err("reloc outside program 0x%lx (0 - 0x%lx/0x%lx)",
350
367
 		       r, start_brk-start_data+text_len, text_len);
351
368
 		goto failed;
..
..
@@ -368,6 +385,7 @@
368
385
 
369
386
 /****************************************************************************/
370
387
 
388
+#ifdef CONFIG_BINFMT_FLAT_OLD
371
389
 static void old_reloc(unsigned long rl)
372
390
 {
373
391
 	static const char *segment[] = { "TEXT", "DATA", "BSS", "*UNKNOWN*" };
..
..
@@ -405,8 +423,33 @@
405
423
 
406
424
 	pr_debug("Relocation became %lx\n", val);
407
425
 }
426
+#endif /* CONFIG_BINFMT_FLAT_OLD */
408
427
 
409
428
 /****************************************************************************/
429
+
430
+static inline u32 __user *skip_got_header(u32 __user *rp)
431
+{
432
+	if (IS_ENABLED(CONFIG_RISCV)) {
433
+		/*
434
+		 * RISC-V has a 16 byte GOT PLT header for elf64-riscv
435
+		 * and 8 byte GOT PLT header for elf32-riscv.
436
+		 * Skip the whole GOT PLT header, since it is reserved
437
+		 * for the dynamic linker (ld.so).
438
+		 */
439
+		u32 rp_val0, rp_val1;
440
+
441
+		if (get_user(rp_val0, rp))
442
+			return rp;
443
+		if (get_user(rp_val1, rp + 1))
444
+			return rp;
445
+
446
+		if (rp_val0 == 0xffffffff && rp_val1 == 0xffffffff)
447
+			rp += 4;
448
+		else if (rp_val0 == 0xffffffff)
449
+			rp += 2;
450
+	}
451
+	return rp;
452
+}
410
453
 
411
454
 static int load_flat_file(struct linux_binprm *bprm,
412
455
 		struct lib_info *libinfo, int id, unsigned long *extra_stack)
..
..
@@ -415,8 +458,8 @@
415
458
 	unsigned long textpos, datapos, realdatastart;
416
459
 	u32 text_len, data_len, bss_len, stack_len, full_data, flags;
417
460
 	unsigned long len, memp, memp_size, extra, rlim;
418
-	u32 __user *reloc, *rp;
419
-	struct inode *inode;
461
+	__be32 __user *reloc;
462
+	u32 __user *rp;
420
463
 	int i, rev, relocs;
421
464
 	loff_t fpos;
422
465
 	unsigned long start_code, end_code;
..
..
@@ -424,7 +467,6 @@
424
467
 	int ret;
425
468
 
426
469
 	hdr = ((struct flat_hdr *) bprm->buf);		/* exec-header */
427
-	inode = file_inode(bprm->file);
428
470
 
429
471
 	text_len  = ntohl(hdr->data_start);
430
472
 	data_len  = ntohl(hdr->data_end) - ntohl(hdr->data_start);
..
..
@@ -454,6 +496,7 @@
454
496
 	if (flags & FLAT_FLAG_KTRACE)
455
497
 		pr_info("Loading file: %s\n", bprm->filename);
456
498
 
499
+#ifdef CONFIG_BINFMT_FLAT_OLD
457
500
 	if (rev != FLAT_VERSION && rev != OLD_FLAT_VERSION) {
458
501
 		pr_err("bad flat file version 0x%x (supported 0x%lx and 0x%lx)\n",
459
502
 		       rev, FLAT_VERSION, OLD_FLAT_VERSION);
..
..
@@ -470,6 +513,23 @@
470
513
 	}
471
514
 
472
515
 	/*
516
+	 * fix up the flags for the older format,  there were all kinds
517
+	 * of endian hacks,  this only works for the simple cases
518
+	 */
519
+	if (rev == OLD_FLAT_VERSION &&
520
+	   (flags || IS_ENABLED(CONFIG_BINFMT_FLAT_OLD_ALWAYS_RAM)))
521
+		flags = FLAT_FLAG_RAM;
522
+
523
+#else /* CONFIG_BINFMT_FLAT_OLD */
524
+	if (rev != FLAT_VERSION) {
525
+		pr_err("bad flat file version 0x%x (supported 0x%lx)\n",
526
+		       rev, FLAT_VERSION);
527
+		ret = -ENOEXEC;
528
+		goto err;
529
+	}
530
+#endif /* !CONFIG_BINFMT_FLAT_OLD */
531
+
532
+	/*
473
533
 	 * Make sure the header params are sane.
474
534
 	 * 28 bits (256 MB) is way more than reasonable in this case.
475
535
 	 * If some top bits are set we have probable binary corruption.
..
..
@@ -479,13 +539,6 @@
479
539
 		ret = -ENOEXEC;
480
540
 		goto err;
481
541
 	}
482
-
483
-	/*
484
-	 * fix up the flags for the older format,  there were all kinds
485
-	 * of endian hacks,  this only works for the simple cases
486
-	 */
487
-	if (rev == OLD_FLAT_VERSION && flat_old_ram_flag(flags))
488
-		flags = FLAT_FLAG_RAM;
489
542
 
490
543
 #ifndef CONFIG_BINFMT_ZFLAT
491
544
 	if (flags & (FLAT_FLAG_GZIP|FLAT_FLAG_GZDATA)) {
..
..
@@ -510,7 +563,7 @@
510
563
 
511
564
 	/* Flush all traces of the currently running executable */
512
565
 	if (id == 0) {
513
-		ret = flush_old_exec(bprm);
566
+		ret = begin_new_exec(bprm);
514
567
 		if (ret)
515
568
 			goto err;
516
569
 
..
..
@@ -587,7 +640,7 @@
587
640
 			goto err;
588
641
 		}
589
642
 
590
-		reloc = (u32 __user *)
643
+		reloc = (__be32 __user *)
591
644
 			(datapos + (ntohl(hdr->reloc_start) - text_len));
592
645
 		memp = realdatastart;
593
646
 		memp_size = len;
..
..
@@ -612,7 +665,7 @@
612
665
 				MAX_SHARED_LIBS * sizeof(u32),
613
666
 				FLAT_DATA_ALIGN);
614
667
 
615
-		reloc = (u32 __user *)
668
+		reloc = (__be32 __user *)
616
669
 			(datapos + (ntohl(hdr->reloc_start) - text_len));
617
670
 		memp = textpos;
618
671
 		memp_size = len;
..
..
@@ -745,7 +798,8 @@
745
798
 	 * image.
746
799
 	 */
747
800
 	if (flags & FLAT_FLAG_GOTPIC) {
748
-		for (rp = (u32 __user *)datapos; ; rp++) {
801
+		rp = skip_got_header((u32 __user *) datapos);
802
+		for (; ; rp++) {
749
803
 			u32 addr, rp_val;
750
804
 			if (get_user(rp_val, rp))
751
805
 				return -EFAULT;
..
..
@@ -775,20 +829,18 @@
775
829
 	 * __start to address 4 so that is okay).
776
830
 	 */
777
831
 	if (rev > OLD_FLAT_VERSION) {
778
-		u32 __maybe_unused persistent = 0;
779
832
 		for (i = 0; i < relocs; i++) {
780
833
 			u32 addr, relval;
834
+			__be32 tmp;
781
835
 
782
836
 			/*
783
837
 			 * Get the address of the pointer to be
784
838
 			 * relocated (of course, the address has to be
785
839
 			 * relocated first).
786
840
 			 */
787
-			if (get_user(relval, reloc + i))
841
+			if (get_user(tmp, reloc + i))
788
842
 				return -EFAULT;
789
-			relval = ntohl(relval);
790
-			if (flat_set_persistent(relval, &persistent))
791
-				continue;
843
+			relval = ntohl(tmp);
792
844
 			addr = flat_get_relocate_addr(relval);
793
845
 			rp = (u32 __user *)calc_reloc(addr, libinfo, id, 1);
794
846
 			if (rp == (u32 __user *)RELOC_FAILED) {
..
..
@@ -797,8 +849,7 @@
797
849
 			}
798
850
 
799
851
 			/* Get the pointer's value.  */
800
-			ret = flat_get_addr_from_rp(rp, relval, flags,
801
-							&addr, &persistent);
852
+			ret = flat_get_addr_from_rp(rp, relval, flags, &addr);
802
853
 			if (unlikely(ret))
803
854
 				goto err;
804
855
 
..
..
@@ -807,8 +858,13 @@
807
858
 				 * Do the relocation.  PIC relocs in the data section are
808
859
 				 * already in target order
809
860
 				 */
810
-				if ((flags & FLAT_FLAG_GOTPIC) == 0)
811
-					addr = ntohl(addr);
861
+				if ((flags & FLAT_FLAG_GOTPIC) == 0) {
862
+					/*
863
+					 * Meh, the same value can have a different
864
+					 * byte order based on a flag..
865
+					 */
866
+					addr = ntohl((__force __be32)addr);
867
+				}
812
868
 				addr = calc_reloc(addr, libinfo, id, 0);
813
869
 				if (addr == RELOC_FAILED) {
814
870
 					ret = -ENOEXEC;
..
..
@@ -821,17 +877,18 @@
821
877
 					goto err;
822
878
 			}
823
879
 		}
880
+#ifdef CONFIG_BINFMT_FLAT_OLD
824
881
 	} else {
825
882
 		for (i = 0; i < relocs; i++) {
826
-			u32 relval;
883
+			__be32 relval;
827
884
 			if (get_user(relval, reloc + i))
828
885
 				return -EFAULT;
829
-			relval = ntohl(relval);
830
-			old_reloc(relval);
886
+			old_reloc(ntohl(relval));
831
887
 		}
888
+#endif /* CONFIG_BINFMT_FLAT_OLD */
832
889
 	}
833
890
 
834
-	flush_icache_range(start_code, end_code);
891
+	flush_icache_user_range(start_code, end_code);
835
892
 
836
893
 	/* zero the BSS,  BRK and stack areas */
837
894
 	if (clear_user((void __user *)(datapos + data_len), bss_len +
..
..
@@ -940,8 +997,6 @@
940
997
 		}
941
998
 	}
942
999
 
943
-	install_exec_creds(bprm);
944
-
945
1000
 	set_binfmt(&flat_format);
946
1001
 
947
1002
 #ifdef CONFIG_MMU
..
..
@@ -975,7 +1030,8 @@
975
1030
 			unsigned long __user *sp;
976
1031
 			current->mm->start_stack -= sizeof(unsigned long);
977
1032
 			sp = (unsigned long __user *)current->mm->start_stack;
978
-			__put_user(start_addr, sp);
1033
+			if (put_user(start_addr, sp))
1034
+				return -EFAULT;
979
1035
 			start_addr = libinfo.lib_list[i].entry;
980
1036
 		}
981
1037
 	}