I decided to run Coverity part-way through the merge window this time
and here's what's been found so far.
----- Forwarded message from scan-ad...@coverity.com -----
Date: Mon, 18 Jan 2021 17:53:19 +0000 (UTC)
From: scan-ad...@coverity.com
To: tom.r...@gmail.com
Subject: New Defects reported by Coverity Scan for Das U-Boot
Hi,
Please find the latest report on new defect(s) introduced to Das U-Boot found
with Coverity Scan.
23 new defect(s) introduced to Das U-Boot found with Coverity Scan.
2 defect(s), reported by Coverity Scan earlier, were marked fixed in the recent
build analyzed by Coverity Scan.
New defect(s) Reported-by: Coverity Scan
Showing 20 of 23 defect(s)
** CID 316365: Memory - corruptions (STRING_OVERFLOW)
/tools/sunxi_egon.c: 96 in egon_set_header()
________________________________________________________________________________________________________
*** CID 316365: Memory - corruptions (STRING_OVERFLOW)
/tools/sunxi_egon.c: 96 in egon_set_header()
90
91 /* If an image name has been provided, use it as the DT name. */
92 if (params->imagename && params->imagename[0]) {
93 if (strlen(params->imagename) > sizeof(header->string_pool) - 1)
94 printf("WARNING: DT name too long for SPL header!\n");
95 else {
CID 316365: Memory - corruptions (STRING_OVERFLOW)
You might overrun the 13-character destination string "header->string_pool" by writing
51 characters from "params->imagename".
96 strcpy((char *)header->string_pool, params->imagename);
97 value = offsetof(struct boot_file_head, string_pool);
98 header->dt_name_offset = cpu_to_le32(value);
99 header->spl_signature[3] = SPL_DT_HEADER_VERSION;
100 }
101 }
** CID 316364: Null pointer dereferences (FORWARD_NULL)
/cmd/efidebug.c: 202 in do_efi_capsule_res()
________________________________________________________________________________________________________
*** CID 316364: Null pointer dereferences (FORWARD_NULL)
/cmd/efidebug.c: 202 in do_efi_capsule_res()
196 printf("Failed to get %ls\n", var_name16);
197
198 return CMD_RET_FAILURE;
199 }
200 }
201
CID 316364: Null pointer dereferences (FORWARD_NULL)
Dereferencing null pointer "result".
202 printf("Result total size: 0x%x\n",
result->variable_total_size);
203 printf("Capsule guid: %pUl\n", &result->capsule_guid);
204 printf("Time processed: %04d-%02d-%02d %02d:%02d:%02d\n",
205 result->capsule_processed.year,
result->capsule_processed.month,
206 result->capsule_processed.day,
result->capsule_processed.hour,
207 result->capsule_processed.minute,
** CID 316363: Null pointer dereferences (REVERSE_INULL)
/lib/efi_loader/efi_boottime.c: 1993 in efi_load_image_from_path()
________________________________________________________________________________________________________
*** CID 316363: Null pointer dereferences (REVERSE_INULL)
/lib/efi_loader/efi_boottime.c: 1993 in efi_load_image_from_path()
1987 ret = EFI_CALL(load_file_protocol->load_file(
1988 load_file_protocol, dp,
boot_policy,
1989 &buffer_size, (void
*)(uintptr_t)addr));
1990 if (ret != EFI_SUCCESS)
1991 efi_free_pages(addr, pages);
1992 out:
CID 316363: Null pointer dereferences (REVERSE_INULL)
Null-checking "load_file_protocol" suggests that it may be null, but it
has already been dereferenced on all paths leading to the check.
1993 if (load_file_protocol)
1994 EFI_CALL(efi_close_protocol(device,
1995
&efi_guid_load_file2_protocol,
1996 efi_root, NULL));
1997 if (ret == EFI_SUCCESS) {
1998 *buffer = (void *)(uintptr_t)addr;
** CID 316362: Error handling issues (CHECKED_RETURN)
/fs/fat/fat_write.c: 422 in fill_dir_slot()
________________________________________________________________________________________________________
*** CID 316362: Error handling issues (CHECKED_RETURN)
/fs/fat/fat_write.c: 422 in fill_dir_slot()
416 while (counter >= 1) {
417 memcpy(itr->dent, slotptr, sizeof(dir_slot));
418 slotptr--;
419 counter--;
420
421 if (itr->remaining == 0)
CID 316362: Error handling issues (CHECKED_RETURN)
Calling "flush_dir" without checking return value (as is done elsewhere 5
out of 6 times).
422 flush_dir(itr);
423
424 next_dent(itr);
425 if (!itr->dent)
426 return -EIO;
427 }
** CID 316361: Code maintainability issues (SIZEOF_MISMATCH)
/lib/efi_loader/efi_capsule.c: 767 in efi_capsule_scan_dir()
________________________________________________________________________________________________________
*** CID 316361: Code maintainability issues (SIZEOF_MISMATCH)
/lib/efi_loader/efi_capsule.c: 767 in efi_capsule_scan_dir()
761
762 ret = EFI_CALL((*dirh->setpos)(dirh, 0));
763 if (ret != EFI_SUCCESS)
764 goto err;
765
766 /* make a list */
CID 316361: Code maintainability issues (SIZEOF_MISMATCH)
Passing argument "count * 8UL /* sizeof (*files) */" to function "dlmalloc" and then casting the return
value to "u16 **" is suspicious. In this particular case "sizeof (u16 **)" happens to be equal to
"sizeof (u16 *)", but this is not a portable assumption.
767 tmp_files = malloc(count * sizeof(*files));
768 if (!tmp_files) {
769 ret = EFI_OUT_OF_RESOURCES;
770 goto err;
771 }
772
** CID 316360: Uninitialized variables (UNINIT)
/tools/mkeficapsule.c: 298 in create_fwbin()
________________________________________________________________________________________________________
*** CID 316360: Uninitialized variables (UNINIT)
/tools/mkeficapsule.c: 298 in create_fwbin()
292 goto err_3;
293 }
294
295 capsule.version = 0x00000001;
296 capsule.embedded_driver_count = 0;
297 capsule.payload_item_count = 1;
CID 316360: Uninitialized variables (UNINIT)
Using uninitialized value "capsule". Field "capsule.item_offset_list" is
uninitialized when calling "fwrite".
298 size = fwrite(&capsule, 1, sizeof(capsule), f);
299 if (size < (sizeof(capsule))) {
300 printf("write failed (%lx)\n", size);
301 goto err_3;
302 }
303 offset = sizeof(capsule) + sizeof(u64);
** CID 316359: Null pointer dereferences (FORWARD_NULL)
________________________________________________________________________________________________________
*** CID 316359: Null pointer dereferences (FORWARD_NULL)
/lib/efi_loader/efi_capsule.c: 380 in efi_capsule_update_firmware()
374 ret = EFI_UNSUPPORTED;
375 goto out;
376 }
377
378 /* find a device for update firmware */
379 /* TODO: should we pass index as well, or nothing but
type? */
CID 316359: Null pointer dereferences (FORWARD_NULL)
Passing null pointer "handles" to "efi_fmp_find", which dereferences it.
380 fmp = efi_fmp_find(&image->update_image_type_id,
381 image->update_hardware_instance,
382 handles, no_handles);
383 if (!fmp) {
384 log_err("EFI Capsule: driver not found for firmware
type: %pUl, hardware instance: %lld\n",
385 &image->update_image_type_id,
** CID 316358: Memory - illegal accesses (BUFFER_SIZE_WARNING)
/drivers/net/sandbox-raw.c: 163 in sb_eth_raw_of_to_plat()
________________________________________________________________________________________________________
*** CID 316358: Memory - illegal accesses (BUFFER_SIZE_WARNING)
/drivers/net/sandbox-raw.c: 163 in sb_eth_raw_of_to_plat()
157 int ret;
158
159 pdata->iobase = dev_read_addr(dev);
160
161 ifname = dev_read_string(dev, "host-raw-interface");
162 if (ifname) {
CID 316358: Memory - illegal accesses (BUFFER_SIZE_WARNING)
Calling "strncpy" with a maximum size argument of 16 bytes on destination array
"priv->host_ifname" of size 16 bytes might leave the destination string unterminated.
163 strncpy(priv->host_ifname, ifname, IFNAMSIZ);
164 printf(": Using %s from DT\n", priv->host_ifname);
165 }
166 if (dev_read_u32(dev, "host-raw-interface-idx",
167 &priv->host_ifindex) < 0) {
168 priv->host_ifindex = 0;
** CID 316357: Memory - corruptions (BUFFER_SIZE)
/fs/fat/fat_write.c: 1154 in fill_dentry()
________________________________________________________________________________________________________
*** CID 316357: Memory - corruptions (BUFFER_SIZE)
/fs/fat/fat_write.c: 1154 in fill_dentry()
1148
1149 set_start_cluster(mydata, dentptr, start_cluster);
1150 dentptr->size = cpu_to_le32(size);
1151
1152 dentptr->attr = attr;
1153
CID 316357: Memory - corruptions (BUFFER_SIZE)
You might overrun the 8 byte destination string "dentptr->name" by writing the
maximum 11 bytes from "shortname".
1154 memcpy(dentptr->name, shortname, SHORT_NAME_SIZE);
1155 }
1156
1157 /**
1158 * find_directory_entry() - find a directory entry by filename
1159 *
** CID 316356: Resource leaks (RESOURCE_LEAK)
/tools/mkeficapsule.c: 225 in add_public_key()
________________________________________________________________________________________________________
*** CID 316356: Resource leaks (RESOURCE_LEAK)
/tools/mkeficapsule.c: 225 in add_public_key()
219 if (ret < 0) {
220 fprintf(stderr, "%s: Unable to add public key to the
FDT\n",
221 __func__);
222 goto err;
223 }
224
CID 316356: Resource leaks (RESOURCE_LEAK)
Handle variable "srcfd" going out of scope leaks the handle.
225 return 0;
226
227 err:
228 if (sptr)
229 munmap(sptr, src_size);
230
** CID 316355: Null pointer dereferences (FORWARD_NULL)
/lib/efi_loader/efi_capsule.c: 848 in efi_capsule_read_file()
________________________________________________________________________________________________________
*** CID 316355: Null pointer dereferences (FORWARD_NULL)
/lib/efi_loader/efi_capsule.c: 848 in efi_capsule_read_file()
842 }
843 ret = EFI_CALL((*fh->getinfo)(fh, &efi_file_info_guid,
844 &size, file_info));
845 }
846 if (ret != EFI_SUCCESS)
847 goto err;
CID 316355: Null pointer dereferences (FORWARD_NULL)
Dereferencing null pointer "file_info".
848 size = file_info->file_size;
849 free(file_info);
850 buf = malloc(size);
851 if (!buf) {
852 ret = EFI_OUT_OF_RESOURCES;
853 goto err;
** CID 316354: Uninitialized variables (UNINIT)
/tools/mkeficapsule.c: 318 in create_fwbin()
________________________________________________________________________________________________________
*** CID 316354: Uninitialized variables (UNINIT)
/tools/mkeficapsule.c: 318 in create_fwbin()
312 image.update_image_index = index;
313 image.update_image_size = bin_stat.st_size;
314 image.update_vendor_code_size = 0; /* none */
315 image.update_hardware_instance = instance;
316 image.image_capsule_support = 0;
317
CID 316354: Uninitialized variables (UNINIT)
Using uninitialized value "image". Field "image.reserved" is uninitialized when
calling "fwrite".
318 size = fwrite(&image, 1, sizeof(image), f);
319 if (size < sizeof(image)) {
320 printf("write failed (%lx)\n", size);
321 goto err_3;
322 }
323 size = fread(data, 1, bin_stat.st_size, g);
** CID 316353: Resource leaks (RESOURCE_LEAK)
/tools/mkeficapsule.c: 225 in add_public_key()
________________________________________________________________________________________________________
*** CID 316353: Resource leaks (RESOURCE_LEAK)
/tools/mkeficapsule.c: 225 in add_public_key()
219 if (ret < 0) {
220 fprintf(stderr, "%s: Unable to add public key to the
FDT\n",
221 __func__);
222 goto err;
223 }
224
CID 316353: Resource leaks (RESOURCE_LEAK)
Variable "sptr" going out of scope leaks the storage it points to.
225 return 0;
226
227 err:
228 if (sptr)
229 munmap(sptr, src_size);
230
** CID 316352: Security best practices violations (STRING_OVERFLOW)
/drivers/dfu/dfu.c: 490 in dfu_fill_entity()
________________________________________________________________________________________________________
*** CID 316352: Security best practices violations (STRING_OVERFLOW)
/drivers/dfu/dfu.c: 490 in dfu_fill_entity()
484 char *interface, char *devstr)
485 {
486 char *st;
487
488 debug("%s: %s interface: %s dev: %s\n", __func__, s, interface,
devstr);
489 st = strsep(&s, " ");
CID 316352: Security best practices violations (STRING_OVERFLOW)
You might overrun the 32-character fixed-size string "dfu->name" by copying
"st" without checking the length.
490 strcpy(dfu->name, st);
491
492 dfu->alt = alt;
493 dfu->max_buf_size = 0;
494 dfu->free_entity = NULL;
495
** CID 316351: Error handling issues (CHECKED_RETURN)
/drivers/video/pwm_backlight.c: 230 in pwm_backlight_of_to_plat()
________________________________________________________________________________________________________
*** CID 316351: Error handling issues (CHECKED_RETURN)
/drivers/video/pwm_backlight.c: 230 in pwm_backlight_of_to_plat()
224 cell = dev_read_prop(dev, "brightness-levels", &len);
225 count = len / sizeof(u32);
226 if (cell && count > index) {
227 priv->levels = malloc(len);
228 if (!priv->levels)
229 return log_ret(-ENOMEM);
CID 316351: Error handling issues (CHECKED_RETURN)
Calling "dev_read_u32_array" without checking return value (as is done
elsewhere 8 out of 9 times).
230 dev_read_u32_array(dev, "brightness-levels",
priv->levels,
231 count);
232 priv->num_levels = count;
233 priv->default_level = priv->levels[index];
234 priv->max_level = priv->levels[count - 1];
235 } else {
** CID 316350: Memory - corruptions (OVERRUN)
/fs/fat/fat_write.c: 1154 in fill_dentry()
________________________________________________________________________________________________________
*** CID 316350: Memory - corruptions (OVERRUN)
/fs/fat/fat_write.c: 1154 in fill_dentry()
1148
1149 set_start_cluster(mydata, dentptr, start_cluster);
1150 dentptr->size = cpu_to_le32(size);
1151
1152 dentptr->attr = attr;
1153
CID 316350: Memory - corruptions (OVERRUN)
Overrunning array "dentptr->name" of 8 bytes by passing it to a function which
accesses it at byte offset 10 using argument "11UL". [Note: The source code implementation
of the function has been overridden by a builtin model.]
1154 memcpy(dentptr->name, shortname, SHORT_NAME_SIZE);
1155 }
1156
1157 /**
1158 * find_directory_entry() - find a directory entry by filename
1159 *
** CID 316349: Resource leaks (RESOURCE_LEAK)
/tools/mkeficapsule.c: 225 in add_public_key()
________________________________________________________________________________________________________
*** CID 316349: Resource leaks (RESOURCE_LEAK)
/tools/mkeficapsule.c: 225 in add_public_key()
219 if (ret < 0) {
220 fprintf(stderr, "%s: Unable to add public key to the
FDT\n",
221 __func__);
222 goto err;
223 }
224
CID 316349: Resource leaks (RESOURCE_LEAK)
Handle variable "destfd" going out of scope leaks the handle.
225 return 0;
226
227 err:
228 if (sptr)
229 munmap(sptr, src_size);
230
** CID 316348: Memory - corruptions (OVERRUN)
/fs/fat/fat_write.c: 188 in set_name()
________________________________________________________________________________________________________
*** CID 316348: Memory - corruptions (OVERRUN)
/fs/fat/fat_write.c: 188 in set_name()
182 /* Each long name directory entry takes 13 characters.
*/
183 ret = (strlen(filename) + 25) / 13;
184 goto out;
185 }
186 return -EIO;
187 out:
CID 316348: Memory - corruptions (OVERRUN)
Overrunning array "dirent.name" of 8 bytes by passing it to a function which
accesses it at byte offset 10 using argument "11UL". [Note: The source code
implementation of the function has been overridden by a builtin model.]
188 memcpy(shortname, dirent.name, SHORT_NAME_SIZE);
189 return ret;
190 }
191
192 static int total_sector;
193 static int disk_write(__u32 block, __u32 nr_blocks, void *buf)
** CID 316347: Null pointer dereferences (FORWARD_NULL)
/cmd/sandbox/exception.c: 16 in do_sigsegv()
________________________________________________________________________________________________________
*** CID 316347: Null pointer dereferences (FORWARD_NULL)
/cmd/sandbox/exception.c: 16 in do_sigsegv()
10
11 static int do_sigsegv(struct cmd_tbl *cmdtp, int flag, int argc,
12 char *const argv[])
13 {
14 u8 *ptr = NULL;
15
CID 316347: Null pointer dereferences (FORWARD_NULL)
Dereferencing null pointer "ptr".
16 *ptr = 0;
17 return CMD_RET_FAILURE;
18 }
19
20 static int do_undefined(struct cmd_tbl *cmdtp, int flag, int argc,
21 char *const argv[])
** CID 316346: Control flow issues (UNREACHABLE)
/test/cmd/setexpr.c: 275 in setexpr_test_backref()
________________________________________________________________________________________________________
*** CID 316346: Control flow issues (UNREACHABLE)
/test/cmd/setexpr.c: 275 in setexpr_test_backref()
269 "us \\1 \\2 \\3!", true));
270 ut_asserteq_str("us this is surely! a test is it? yes us this is
indeed! a test",
271 buf);
272
273 /* The following checks fail at present due to a bug in setexpr
*/
274 return 0;
CID 316346: Control flow issues (UNREACHABLE)
This code cannot be reached: "i = 256;".
275 for (i = BUF_SIZE; i < 0x1000; i++) {
276 ut_assertf(buf[i] == (char)i,
277 "buf byte at %x should be %02x, got %02x)\n",
278 i, i & 0xff, (u8)buf[i]);
279 ut_assertf(nbuf[i] == (char)i,
280 "nbuf byte at %x should be %02x, got
%02x)\n",
________________________________________________________________________________________________________
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----- End forwarded message -----
