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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2021-08-15 22:05:40 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2021-08-15 22:34:15 +0200
commit43248f33b6c1e123d43bb93f2cdac5e5e6b1d9aa (patch)
tree83c858a6bda75616947f76ab33b3a342d8efc46a
parent2d73cdd49c5371dc4b7980f70b066edb412b91b3 (diff)
Fix explicit NULL derference for the extract-one example
On the 1.1.x branch, the upstream "allow delete if NULL" patch is not applied, so this needs an explcit fix. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
-rw-r--r--extras/extract_one.c39
1 files changed, 23 insertions, 16 deletions
diff --git a/extras/extract_one.c b/extras/extract_one.c
index fcd8124..4f5b547 100644
--- a/extras/extract_one.c
+++ b/extras/extract_one.c
@@ -52,7 +52,7 @@ int main(int argc, char **argv)
ret = sqfs_super_read(&super, file);
if (ret) {
fprintf(stderr, "%s: error reading super block.\n", argv[1]);
- goto out;
+ goto out_file;
}
sqfs_compressor_config_init(&cfg, super.compression_id,
@@ -62,62 +62,62 @@ int main(int argc, char **argv)
ret = sqfs_compressor_create(&cfg, &cmp);
if (ret != 0) {
fprintf(stderr, "%s: error creating compressor: %d.\n", argv[1], ret);
- goto out;
+ goto out_file;
}
if (!(super.flags & SQFS_FLAG_NO_XATTRS)) {
xattr = sqfs_xattr_reader_create(0);
if (xattr == NULL) {
fprintf(stderr, "%s: error creating xattr reader: %d.\n", argv[1], SQFS_ERROR_ALLOC);
- goto out;
+ goto out_cmp;
}
ret = sqfs_xattr_reader_load(xattr, &super, file, cmp);
if (ret) {
fprintf(stderr, "%s: error loading xattr reader: %d.\n", argv[1], ret);
- goto out;
+ goto out_xattr;
}
}
idtbl = sqfs_id_table_create(0);
if (idtbl == NULL) {
fprintf(stderr, "%s: error creating ID table: %d.\n", argv[1], ret);
- goto out;
+ goto out_xattr;
}
ret = sqfs_id_table_read(idtbl, file, &super, cmp);
if (ret) {
fprintf(stderr, "%s: error loading ID table: %d.\n", argv[1], ret);
- goto out;
+ goto out_idtbl;
}
dirrd = sqfs_dir_reader_create(&super, cmp, file, 0);
if (dirrd == NULL) {
fprintf(stderr, "%s: error creating dir reader: %d.\n", argv[1], SQFS_ERROR_ALLOC);
- goto out;
+ goto out_idtbl;
}
data = sqfs_data_reader_create(file, super.block_size, cmp, 0);
if (data == NULL) {
fprintf(stderr, "%s: error creating data reader: %d.\n", argv[1], SQFS_ERROR_ALLOC);
- goto out;
+ goto out_dirrd;
}
ret = sqfs_data_reader_load_fragment_table(data, &super);
if (ret) {
fprintf(stderr, "%s: error loading fragment table: %d.\n", argv[1], ret);
- goto out;
+ goto out_data;
}
ret = sqfs_dir_reader_get_full_hierarchy(dirrd, idtbl, argv[2], 0, &n);
if (ret) {
fprintf(stderr, "%s: error reading filesystem hierarchy: %d.\n", argv[1], ret);
- goto out;
+ goto out_data;
}
if (!S_ISREG(n->inode->base.mode)) {
fprintf(stderr, "/%s is not a file\n", argv[2]);
- goto out;
+ goto out_tree;
}
sqfs_inode_get_file_size(n->inode, &file_size);
@@ -125,7 +125,7 @@ int main(int argc, char **argv)
output = p = malloc(file_size);
if (output == NULL) {
fprintf(stderr, "malloc failed: %d\n", errno);
- goto out;
+ goto out_tree;
}
for (size_t i = 0; i < sqfs_inode_get_file_block_count(n->inode); ++i) {
@@ -135,7 +135,7 @@ int main(int argc, char **argv)
ret = sqfs_data_reader_get_block(data, n->inode, i, &chunk_size, &chunk);
if (ret) {
fprintf(stderr, "reading data block: %d\n", ret);
- goto out;
+ goto out_tree;
}
memcpy(p, chunk, chunk_size);
@@ -152,7 +152,7 @@ int main(int argc, char **argv)
ret = sqfs_data_reader_get_fragment(data, n->inode, &chunk_size, &chunk);
if (ret) {
fprintf(stderr, "reading fragment block: %d\n", ret);
- goto out;
+ goto out_tree;
}
memcpy(p, chunk, chunk_size);
@@ -163,13 +163,20 @@ int main(int argc, char **argv)
fprintf(stdout, "%s\n", (char *)output);
status = EXIT_SUCCESS;
-out:
+out_tree:
sqfs_dir_tree_destroy(n);
+out_data:
sqfs_destroy(data);
+out_dirrd:
sqfs_destroy(dirrd);
+out_idtbl:
sqfs_destroy(idtbl);
- sqfs_destroy(xattr);
+out_xattr:
+ if (xattr != NULL)
+ sqfs_destroy(xattr);
+out_cmp:
sqfs_destroy(cmp);
+out_file:
sqfs_destroy(file);
free(output);