xiaoxiang781216 commented on code in PR #19162:
URL: https://github.com/apache/nuttx/pull/19162#discussion_r3430331684
##########
fs/inode/fs_inode.c:
##########
@@ -244,16 +272,29 @@ int inode_checkperm(FAR struct inode *inode, int oflags)
return -EACCES;
}
-#if defined(CONFIG_PSEUDOFS_ATTRIBUTES) && defined(CONFIG_SCHED_USER_IDENTITY)
+#ifdef CONFIG_FS_PERMISSION
if (INODE_IS_MOUNTPT(inode))
{
return OK;
}
+ /* /etc/passwd and /etc/group must be world-readable so that getpwnam()
+ * and getgrnam() work after a non-root setuid(). Encrypted passwords
+ * live in the passwd file; secrecy is provided by hashing, not file
+ * permissions.
+ */
+
+ if ((oflags & O_RDOK) != 0 &&
+ (strcmp(inode->i_name, "passwd") == 0 ||
+ strcmp(inode->i_name, "group") == 0))
+ {
+ return OK;
+ }
+
return _inode_checkmode(inode, amode);
Review Comment:
ditto
##########
fs/inode/fs_inode.c:
##########
Review Comment:
call fs_checkmode
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