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Description for this pull request:

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- fix overflow issue at sector calculation.
   - fix wrong hint_stat initialization.
   - fix wrong size update of stream entry.
   - fix endianness of upname in name_hash computation.
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Merge tag 'exfat-for-5.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat into master

Pull exfat fixes from Namjae Jeon:

 - fix overflow issue at sector calculation

 - fix wrong hint_stat initialization

 - fix wrong size update of stream entry

 - fix endianness of upname in name_hash computation

* tag 'exfat-for-5.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat:
  exfat: fix name_hash computation on big endian systems
  exfat: fix wrong size update of stream entry by typo
  exfat: fix wrong hint_stat initialization in exfat_find_dir_entry()
  exfat: fix overflow issue in exfat_cluster_to_sector()
This commit is contained in:
Linus Torvalds 2020-07-22 11:30:07 -07:00
commit 071fb1bcd7
4 changed files with 7 additions and 7 deletions
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2
fs/exfat/dir.c
View File

@ -1112,7 +1112,7 @@ found:
ret = exfat_get_next_cluster(sb, &clu.dir);
}
if (ret || clu.dir != EXFAT_EOF_CLUSTER) {
if (ret || clu.dir == EXFAT_EOF_CLUSTER) {
/* just initialized hint_stat */
hint_stat->clu = p_dir->dir;
hint_stat->eidx = 0;

2
fs/exfat/exfat_fs.h
View File

@ -371,7 +371,7 @@ static inline bool exfat_is_last_sector_in_cluster(struct exfat_sb_info *sbi,
static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi,
unsigned int clus)
{
return ((clus - EXFAT_RESERVED_CLUSTERS) << sbi->sect_per_clus_bits) +
return ((sector_t)(clus - EXFAT_RESERVED_CLUSTERS) << sbi->sect_per_clus_bits) +
sbi->data_start_sector;
}

2
fs/exfat/file.c
View File

@ -176,7 +176,7 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
ep2->dentry.stream.size = 0;
} else {
ep2->dentry.stream.valid_size = cpu_to_le64(new_size);
ep2->dentry.stream.size = ep->dentry.stream.valid_size;
ep2->dentry.stream.size = ep2->dentry.stream.valid_size;
}
if (new_size == 0) {

8
fs/exfat/nls.c
View File

@ -495,7 +495,7 @@ static int exfat_utf8_to_utf16(struct super_block *sb,
struct exfat_uni_name *p_uniname, int *p_lossy)
{
int i, unilen, lossy = NLS_NAME_NO_LOSSY;
unsigned short upname[MAX_NAME_LENGTH + 1];
__le16 upname[MAX_NAME_LENGTH + 1];
unsigned short *uniname = p_uniname->name;
WARN_ON(!len);
@ -519,7 +519,7 @@ static int exfat_utf8_to_utf16(struct super_block *sb,
exfat_wstrchr(bad_uni_chars, *uniname))
lossy |= NLS_NAME_LOSSY;
upname[i] = exfat_toupper(sb, *uniname);
upname[i] = cpu_to_le16(exfat_toupper(sb, *uniname));
uniname++;
}
@ -597,7 +597,7 @@ static int exfat_nls_to_ucs2(struct super_block *sb,
struct exfat_uni_name *p_uniname, int *p_lossy)
{
int i = 0, unilen = 0, lossy = NLS_NAME_NO_LOSSY;
unsigned short upname[MAX_NAME_LENGTH + 1];
__le16 upname[MAX_NAME_LENGTH + 1];
unsigned short *uniname = p_uniname->name;
struct nls_table *nls = EXFAT_SB(sb)->nls_io;
@ -611,7 +611,7 @@ static int exfat_nls_to_ucs2(struct super_block *sb,
exfat_wstrchr(bad_uni_chars, *uniname))
lossy |= NLS_NAME_LOSSY;
upname[unilen] = exfat_toupper(sb, *uniname);
upname[unilen] = cpu_to_le16(exfat_toupper(sb, *uniname));
uniname++;
unilen++;
}