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fs/squashfs: sqfs_frag_lookup: simplify error handling

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For consistency with other functions.

Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
This commit is contained in:
Richard Genoud 2020-11-03 12:11:15 +01:00 committed by Tom Rini
parent 555459e793
commit c9b8e86f8b
1 changed files with 16 additions and 12 deletions
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28
fs/squashfs/sqfs.c
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@ -106,6 +106,10 @@ static int sqfs_frag_lookup(u32 inode_fragment_index,
int block, offset, ret; int block, offset, ret;
u16 header; u16 header;
metadata_buffer = NULL;
entries = NULL;
table = NULL;
if (inode_fragment_index >= get_unaligned_le32(&sblk->fragments)) if (inode_fragment_index >= get_unaligned_le32(&sblk->fragments))
return -EINVAL; return -EINVAL;
@ -117,12 +121,14 @@ static int sqfs_frag_lookup(u32 inode_fragment_index,
/* Allocate a proper sized buffer to store the fragment index table */ /* Allocate a proper sized buffer to store the fragment index table */
table = malloc_cache_aligned(n_blks * ctxt.cur_dev->blksz); table = malloc_cache_aligned(n_blks * ctxt.cur_dev->blksz);
if (!table) if (!table) {
return -ENOMEM; ret = -ENOMEM;
goto out;
}
if (sqfs_disk_read(start, n_blks, table) < 0) { if (sqfs_disk_read(start, n_blks, table) < 0) {
free(table); ret = -EINVAL;
return -EINVAL; goto out;
} }
block = SQFS_FRAGMENT_INDEX(inode_fragment_index); block = SQFS_FRAGMENT_INDEX(inode_fragment_index);
@ -142,12 +148,12 @@ static int sqfs_frag_lookup(u32 inode_fragment_index,
metadata_buffer = malloc_cache_aligned(n_blks * ctxt.cur_dev->blksz); metadata_buffer = malloc_cache_aligned(n_blks * ctxt.cur_dev->blksz);
if (!metadata_buffer) { if (!metadata_buffer) {
ret = -ENOMEM; ret = -ENOMEM;
goto free_table; goto out;
} }
if (sqfs_disk_read(start, n_blks, metadata_buffer) < 0) { if (sqfs_disk_read(start, n_blks, metadata_buffer) < 0) {
ret = -EINVAL; ret = -EINVAL;
goto free_buffer; goto out;
} }
/* Every metadata block starts with a 16-bit header */ /* Every metadata block starts with a 16-bit header */
@ -156,13 +162,13 @@ static int sqfs_frag_lookup(u32 inode_fragment_index,
if (!metadata || !header) { if (!metadata || !header) {
ret = -ENOMEM; ret = -ENOMEM;
goto free_buffer; goto out;
} }
entries = malloc(SQFS_METADATA_BLOCK_SIZE); entries = malloc(SQFS_METADATA_BLOCK_SIZE);
if (!entries) { if (!entries) {
ret = -ENOMEM; ret = -ENOMEM;
goto free_buffer; goto out;
} }
if (SQFS_COMPRESSED_METADATA(header)) { if (SQFS_COMPRESSED_METADATA(header)) {
@ -172,7 +178,7 @@ static int sqfs_frag_lookup(u32 inode_fragment_index,
src_len); src_len);
if (ret) { if (ret) {
ret = -EINVAL; ret = -EINVAL;
goto free_entries; goto out;
} }
} else { } else {
memcpy(entries, metadata, SQFS_METADATA_SIZE(header)); memcpy(entries, metadata, SQFS_METADATA_SIZE(header));
@ -181,11 +187,9 @@ static int sqfs_frag_lookup(u32 inode_fragment_index,
*e = entries[offset]; *e = entries[offset];
ret = SQFS_COMPRESSED_BLOCK(e->size); ret = SQFS_COMPRESSED_BLOCK(e->size);
free_entries: out:
free(entries); free(entries);
free_buffer:
free(metadata_buffer); free(metadata_buffer);
free_table:
free(table); free(table);
return ret; return ret;