From: BingJing Chang <bingjingc@xxxxxxxxxxxx>
If uid or gid of mount options is larger than INT_MAX, udf_fill_super will
return -EINVAL.
The problem can be encountered by a domain user or reproduced via:
mount -o loop,uid=2147483648 something-in-udf-format.iso /mnt
This can be fixed as commit 233a01fa9c4c ("fuse: handle large user and
group ID").
Reviewed-by: Robbie Ko <robbieko@xxxxxxxxxxxx>
Reviewed-by: Chung-Chiang Cheng <cccheng@xxxxxxxxxxxx>
Reviewed-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: BingJing Chang <bingjingc@xxxxxxxxxxxx>
---
fs/udf/super.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/udf/super.c b/fs/udf/super.c
index d0df217..2f83c12 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -459,6 +459,7 @@ static int udf_parse_options(char *options, struct udf_options *uopt,
{
char *p;
int option;
+ unsigned int uv;
uopt->novrs = 0;
uopt->session = 0xFFFFFFFF;
@@ -508,17 +509,17 @@ static int udf_parse_options(char *options, struct udf_options *uopt,
uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
break;
case Opt_gid:
- if (match_int(args, &option))
+ if (match_uint(args, &uv))
return 0;
- uopt->gid = make_kgid(current_user_ns(), option);
+ uopt->gid = make_kgid(current_user_ns(), uv);
if (!gid_valid(uopt->gid))
return 0;
uopt->flags |= (1 << UDF_FLAG_GID_SET);
break;
case Opt_uid:
- if (match_int(args, &option))
+ if (match_uint(args, &uv))
return 0;
- uopt->uid = make_kuid(current_user_ns(), option);
+ uopt->uid = make_kuid(current_user_ns(), uv);
if (!uid_valid(uopt->uid))
return 0;
uopt->flags |= (1 << UDF_FLAG_UID_SET);
--
2.7.4
