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udf: Return -ENOMEM when allocation fails in udf_get_filename()

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Return -ENOMEM when allocation fails in udf_get_filename(). Update
udf_pc_to_char(), udf_readdir(), and udf_find_entry() to handle the
error appropriately. This allows us to pass appropriate error to
userspace instead of corrupting symlink contents by omitting some path
elements.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Fabian Frederick 2015-04-08 21:23:51 +02:00 • committed by Jan Kara
parent c0655fe9b0
commit 5ceb8b554d
4 changed files with 12 additions and 7 deletions
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12
fs/udf/unicode.c
View file

@ -338,15 +338,17 @@ int udf_get_filename(struct super_block *sb, uint8_t *sname, int slen,
uint8_t *dname, int dlen)
{
struct ustr *filename, *unifilename;
int len = 0;
int ret = 0;
filename = kmalloc(sizeof(struct ustr), GFP_NOFS);
if (!filename)
return 0;
return -ENOMEM;
unifilename = kmalloc(sizeof(struct ustr), GFP_NOFS);
if (!unifilename)
if (!unifilename) {
ret = -ENOMEM;
goto out1;
}
if (udf_build_ustr_exact(unifilename, sname, slen))
goto out2;
@ -367,14 +369,14 @@ int udf_get_filename(struct super_block *sb, uint8_t *sname, int slen,
} else
goto out2;
len = udf_translate_to_linux(dname, dlen,
ret = udf_translate_to_linux(dname, dlen,
filename->u_name, filename->u_len,
unifilename->u_name, unifilename->u_len);
out2:
kfree(unifilename);
out1:
kfree(filename);
return len;
return ret;
}
int udf_put_filename(struct super_block *sb, const uint8_t *sname,