diff options
| author | Fabian Frederick <fabf@skynet.be> | 2015-04-08 21:23:51 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2015-05-18 11:23:03 +0200 |
| commit | 5ceb8b554dcaaf6844415cd2616ce2e0132530fa (patch) | |
| tree | c80877de890e6f3ab8d47aae705d39401031efb8 | |
| parent | c0655fe9b0901a968800f56687be3c62b4cce5d2 (diff) | |
| download | linux-5ceb8b554dcaaf6844415cd2616ce2e0132530fa.tar.bz2 | |
udf: Return -ENOMEM when allocation fails in udf_get_filename()
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>
| -rw-r--r-- | fs/udf/dir.c | 2 | ||||
| -rw-r--r-- | fs/udf/namei.c | 2 | ||||
| -rw-r--r-- | fs/udf/symlink.c | 3 | ||||
| -rw-r--r-- | fs/udf/unicode.c | 12 |
4 files changed, 12 insertions, 7 deletions
diff --git a/fs/udf/dir.c b/fs/udf/dir.c index 541a12b5792d..fcf227eb2c51 100644 --- a/fs/udf/dir.c +++ b/fs/udf/dir.c @@ -168,7 +168,7 @@ static int udf_readdir(struct file *file, struct dir_context *ctx) } flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN); - if (!flen) + if (flen <= 0) continue; tloc = lelb_to_cpu(cfi.icb.extLocation); diff --git a/fs/udf/namei.c b/fs/udf/namei.c index 5c03f0dfb98b..51b1c31b55c8 100644 --- a/fs/udf/namei.c +++ b/fs/udf/namei.c @@ -234,7 +234,7 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir, continue; flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN); - if (flen && udf_match(flen, fname, child->len, child->name)) + if (flen > 0 && udf_match(flen, fname, child->len, child->name)) goto out_ok; } diff --git a/fs/udf/symlink.c b/fs/udf/symlink.c index 8dfbc4025e2f..862535b3ba58 100644 --- a/fs/udf/symlink.c +++ b/fs/udf/symlink.c @@ -82,6 +82,9 @@ static int udf_pc_to_char(struct super_block *sb, unsigned char *from, comp_len = udf_get_filename(sb, pc->componentIdent, pc->lengthComponentIdent, p, tolen); + if (comp_len < 0) + return comp_len; + p += comp_len; tolen -= comp_len; if (tolen == 0) diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c index b84fee372734..4911c1d84882 100644 --- a/fs/udf/unicode.c +++ b/fs/udf/unicode.c @@ -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, |