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Subject[PATCH v2] hfsplus: Fix bug causing custom uid and gid being unable to be assigned with mount
Date
From: Aditya Garg <gargaditya08@live.com>

Despite specifying UID and GID in mount command, the specified UID and GID
were not being assigned. This patch fixes this issue.

Cc: stable@vger.kernel.org
Signed-off-by: Aditya Garg <gargaditya08@live.com>
---
fs/hfsplus/hfsplus_fs.h | 2 ++
fs/hfsplus/inode.c | 4 ++--
fs/hfsplus/options.c | 4 ++++
3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index a5db2e3b2..6aa919e59 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -198,6 +198,8 @@ struct hfsplus_sb_info {
#define HFSPLUS_SB_HFSX 3
#define HFSPLUS_SB_CASEFOLD 4
#define HFSPLUS_SB_NOBARRIER 5
+#define HFSPLUS_SB_UID 6
+#define HFSPLUS_SB_GID 7

static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
{
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index aeab83ed1..b675581aa 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -192,11 +192,11 @@ static void hfsplus_get_perms(struct inode *inode,
mode = be16_to_cpu(perms->mode);

i_uid_write(inode, be32_to_cpu(perms->owner));
- if (!i_uid_read(inode) && !mode)
+ if ((test_bit(HFSPLUS_SB_UID, &sbi->flags)) || (!i_uid_read(inode) && !mode))
inode->i_uid = sbi->uid;

i_gid_write(inode, be32_to_cpu(perms->group));
- if (!i_gid_read(inode) && !mode)
+ if ((test_bit(HFSPLUS_SB_GID, &sbi->flags)) || (!i_gid_read(inode) && !mode))
inode->i_gid = sbi->gid;

if (dir) {
diff --git a/fs/hfsplus/options.c b/fs/hfsplus/options.c
index 047e05c57..c94a58762 100644
--- a/fs/hfsplus/options.c
+++ b/fs/hfsplus/options.c
@@ -140,6 +140,8 @@ int hfsplus_parse_options(char *input, struct hfsplus_sb_info *sbi)
if (!uid_valid(sbi->uid)) {
pr_err("invalid uid specified\n");
return 0;
+ } else {
+ set_bit(HFSPLUS_SB_UID, &sbi->flags);
}
break;
case opt_gid:
@@ -151,6 +153,8 @@ int hfsplus_parse_options(char *input, struct hfsplus_sb_info *sbi)
if (!gid_valid(sbi->gid)) {
pr_err("invalid gid specified\n");
return 0;
+ } else {
+ set_bit(HFSPLUS_SB_GID, &sbi->flags);
}
break;
case opt_part:
--
2.38.1
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