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| author |   Miklos Szeredi <mszeredi@redhat.com> | 2016-10-03 11:06:05 +0200 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2016-10-03 11:06:05 +0200 |
| commit | 63401ccdb2ca08ae76909f6588a3f3348bc3555d (patch) | |
| tree | c11152318b15a203e49d4b8d6aacea3d9548f166 /fs/fuse | |
| parent | fuse: remove duplicate cs->offset assignment (diff) | |
| download | linux-dev-63401ccdb2ca08ae76909f6588a3f3348bc3555d.tar.xz linux-dev-63401ccdb2ca08ae76909f6588a3f3348bc3555d.zip | |
fuse: limit xattr returned size
Don't let userspace filesystem give bogus values for the size of xattr and
xattr list.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/fuse')
| -rw-r--r-- | fs/fuse/xattr.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/fuse/xattr.c b/fs/fuse/xattr.c index 04b097f29d8a..3caac46b08b0 100644 --- a/fs/fuse/xattr.c +++ b/fs/fuse/xattr.c @@ -79,7 +79,7 @@ ssize_t fuse_getxattr(struct inode *inode, const char *name, void *value, } ret = fuse_simple_request(fc, &args); if (!ret && !size) - ret = outarg.size; + ret = min_t(ssize_t, outarg.size, XATTR_SIZE_MAX); if (ret == -ENOSYS) { fc->no_getxattr = 1; ret = -EOPNOTSUPP; @@ -138,7 +138,7 @@ ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size) } ret = fuse_simple_request(fc, &args); if (!ret && !size) - ret = outarg.size; + ret = min_t(ssize_t, outarg.size, XATTR_LIST_MAX); if (ret > 0 && size) ret = fuse_verify_xattr_list(list, ret); if (ret == -ENOSYS) { |