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isofs: handle large user and group ID 

If uid or gid of mount options is larger than INT_MAX, isofs_fill_super
will return -EINVAL.

The problem can be encountered by a domain user or reproduced via:
mount -o loop,uid=2147483648 ubuntu-16.04.6-server-amd64.iso /mnt

This can be fixed as commit 233a01fa9c ("fuse: handle large user and
group ID").

Link: https://lore.kernel.org/r/20210129045315.10375-1-bingjingc@synology.com
Reviewed-by: Robbie Ko <robbieko@synology.com>
Reviewed-by: Chung-Chiang Cheng <cccheng@synology.com>
Signed-off-by: BingJing Chang <bingjingc@synology.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
BingJing Chang 2021-01-29 12:53:15 +08:00 committed by Jan Kara
parent 01531ac354
commit a0b3cb71a1
1 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
fs/isofs/inode.c
View File

@ -339,6 +339,7 @@ static int parse_options(char *options, struct iso9660_options *popt)
{
char *p;
int option;
unsigned int uv;
popt->map = 'n';
popt->rock = 1;
@ -434,17 +435,17 @@ static int parse_options(char *options, struct iso9660_options *popt)
case Opt_ignore:
break;
case Opt_uid:
if (match_int(&args[0], &option))
if (match_uint(&args[0], &uv))
return 0;
popt->uid = make_kuid(current_user_ns(), option);
popt->uid = make_kuid(current_user_ns(), uv);
if (!uid_valid(popt->uid))
return 0;
popt->uid_set = 1;
break;
case Opt_gid:
if (match_int(&args[0], &option))
if (match_uint(&args[0], &uv))
return 0;
popt->gid = make_kgid(current_user_ns(), option);
popt->gid = make_kgid(current_user_ns(), uv);
if (!gid_valid(popt->gid))
return 0;
popt->gid_set = 1;