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udf: handle large user and group ID 

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 233a01fa9c ("fuse: handle large user and
group ID").

Link: https://lore.kernel.org/r/20210129045502.10546-1-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 12:55:02 +08:00 committed by Jan Kara
parent a0b3cb71a1
commit 3a9a3aa805
1 changed files with 5 additions and 4 deletions
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9
fs/udf/super.c
View File

@ -459,6 +459,7 @@ static int udf_parse_options(char *options, struct udf_options *uopt,
{ {
char *p; char *p;
int option; int option;
unsigned int uv;
uopt->novrs = 0; uopt->novrs = 0;
uopt->session = 0xFFFFFFFF; 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); uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
break; break;
case Opt_gid: case Opt_gid:
if (match_int(args, &option)) if (match_uint(args, &uv))
return 0; return 0;
uopt->gid = make_kgid(current_user_ns(), option); uopt->gid = make_kgid(current_user_ns(), uv);
if (!gid_valid(uopt->gid)) if (!gid_valid(uopt->gid))
return 0; return 0;
uopt->flags |= (1 << UDF_FLAG_GID_SET); uopt->flags |= (1 << UDF_FLAG_GID_SET);
break; break;
case Opt_uid: case Opt_uid:
if (match_int(args, &option)) if (match_uint(args, &uv))
return 0; return 0;
uopt->uid = make_kuid(current_user_ns(), option); uopt->uid = make_kuid(current_user_ns(), uv);
if (!uid_valid(uopt->uid)) if (!uid_valid(uopt->uid))
return 0; return 0;
uopt->flags |= (1 << UDF_FLAG_UID_SET); uopt->flags |= (1 << UDF_FLAG_UID_SET);