Btrfs: check return value of bio_alloc() properly
bio_alloc() has the possibility of returning NULL. So, it is necessary to check the return value. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -405,6 +405,7 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
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bio_put(bio);
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bio = compressed_bio_alloc(bdev, first_byte, GFP_NOFS);
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BUG_ON(!bio);
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bio->bi_private = cb;
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bio->bi_end_io = end_compressed_bio_write;
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bio_add_page(bio, page, PAGE_CACHE_SIZE, 0);
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@ -687,6 +688,7 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
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comp_bio = compressed_bio_alloc(bdev, cur_disk_byte,
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GFP_NOFS);
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BUG_ON(!comp_bio);
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comp_bio->bi_private = cb;
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comp_bio->bi_end_io = end_compressed_bio_read;
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@ -2180,6 +2180,10 @@ static int bio_readpage_error(struct bio *failed_bio, struct page *page,
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}
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bio = bio_alloc(GFP_NOFS, 1);
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if (!bio) {
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free_io_failure(inode, failrec, 0);
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return -EIO;
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}
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bio->bi_private = state;
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bio->bi_end_io = failed_bio->bi_end_io;
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bio->bi_sector = failrec->logical >> 9;
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@ -1044,6 +1044,8 @@ static int scrub_recheck_block(struct btrfs_fs_info *fs_info,
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BUG_ON(!page->page);
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bio = bio_alloc(GFP_NOFS, 1);
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if (!bio)
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return -EIO;
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bio->bi_bdev = page->bdev;
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bio->bi_sector = page->physical >> 9;
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bio->bi_end_io = scrub_complete_bio_end_io;
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@ -1172,6 +1174,8 @@ static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad,
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DECLARE_COMPLETION_ONSTACK(complete);
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bio = bio_alloc(GFP_NOFS, 1);
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if (!bio)
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return -EIO;
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bio->bi_bdev = page_bad->bdev;
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bio->bi_sector = page_bad->physical >> 9;
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bio->bi_end_io = scrub_complete_bio_end_io;
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