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Merge tag 'fs_for_v5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

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Pull ext2 and reiserfs updates from Jan Kara:
 "A fix for ext2 handling of a corrupted fs image and cleanups in ext2
  and reiserfs"

* tag 'fs_for_v5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  ext2: Add more validity checks for inode counts
  fs/reiserfs/inode: remove dead code in _get_block_create_0()
  fs/ext2: replace ternary operator with min_t()
This commit is contained in:
Linus Torvalds 2022-08-01 08:48:37 -07:00
parent eb43bbac4c fa78f33693
commit af07685b9c
2 changed files with 14 additions and 16 deletions
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18
fs/ext2/super.c
View file

@ -1059,9 +1059,10 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_frags_per_group);
goto failed_mount;
}
if (sbi->s_inodes_per_group > sb->s_blocksize * 8) {
if (sbi->s_inodes_per_group < sbi->s_inodes_per_block ||
sbi->s_inodes_per_group > sb->s_blocksize * 8) {
ext2_msg(sb, KERN_ERR,
"error: #inodes per group too big: %lu",
"error: invalid #inodes per group: %lu",
sbi->s_inodes_per_group);
goto failed_mount;
}
@ -1071,6 +1072,13 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
le32_to_cpu(es->s_first_data_block) - 1)
/ EXT2_BLOCKS_PER_GROUP(sb)) + 1;
if ((u64)sbi->s_groups_count * sbi->s_inodes_per_group !=
le32_to_cpu(es->s_inodes_count)) {
ext2_msg(sb, KERN_ERR, "error: invalid #inodes: %u vs computed %llu",
le32_to_cpu(es->s_inodes_count),
(u64)sbi->s_groups_count * sbi->s_inodes_per_group);
goto failed_mount;
}
db_count = (sbi->s_groups_count + EXT2_DESC_PER_BLOCK(sb) - 1) /
EXT2_DESC_PER_BLOCK(sb);
sbi->s_group_desc = kmalloc_array(db_count,
@ -1490,8 +1498,7 @@ static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data,
len = i_size-off;
toread = len;
while (toread > 0) {
tocopy = sb->s_blocksize - offset < toread ?
sb->s_blocksize - offset : toread;
tocopy = min_t(size_t, sb->s_blocksize - offset, toread);
tmp_bh.b_state = 0;
tmp_bh.b_size = sb->s_blocksize;
@ -1529,8 +1536,7 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type,
struct buffer_head *bh;
while (towrite > 0) {
tocopy = sb->s_blocksize - offset < towrite ?
sb->s_blocksize - offset : towrite;
tocopy = min_t(size_t, sb->s_blocksize - offset, towrite);
tmp_bh.b_state = 0;
tmp_bh.b_size = sb->s_blocksize;

12
fs/reiserfs/inode.c
View file

@ -290,7 +290,7 @@ static int _get_block_create_0(struct inode *inode, sector_t block,
struct buffer_head *bh;
struct item_head *ih, tmp_ih;
b_blocknr_t blocknr;
char *p = NULL;
char *p;
int chars;
int ret;
int result;
@ -305,8 +305,6 @@ static int _get_block_create_0(struct inode *inode, sector_t block,
result = search_for_position_by_key(inode->i_sb, &key, &path);
if (result != POSITION_FOUND) {
pathrelse(&path);
if (p)
kunmap(bh_result->b_page);
if (result == IO_ERROR)
return -EIO;
/*
@ -352,8 +350,6 @@ static int _get_block_create_0(struct inode *inode, sector_t block,
}
pathrelse(&path);
if (p)
kunmap(bh_result->b_page);
return ret;
}
/* requested data are in direct item(s) */
@ -363,8 +359,6 @@ static int _get_block_create_0(struct inode *inode, sector_t block,
* when it is stored in direct item(s)
*/
pathrelse(&path);
if (p)
kunmap(bh_result->b_page);
return -ENOENT;
}
@ -396,9 +390,7 @@ static int _get_block_create_0(struct inode *inode, sector_t block,
* sure we need to. But, this means the item might move if
* kmap schedules
*/
if (!p)
p = (char *)kmap(bh_result->b_page);
p = (char *)kmap(bh_result->b_page);
p += offset;
memset(p, 0, inode->i_sb->s_blocksize);
do {