pussuw commented on code in PR #16361:
URL: https://github.com/apache/nuttx/pull/16361#discussion_r2099903455
##########
fs/vfs/fs_dup.c:
##########
@@ -65,29 +65,32 @@ int file_dup(FAR struct file *filep, int minfd, int flags)
uint8_t f_tag_fdcheck; /* File owner fdcheck tag, init to 0 */
#endif
- fd2 = file_allocate(g_root_inode, 0, 0, NULL, minfd, true);
+ /* Pass the close on exec flag to file_allocate */
+
+ fd2 = file_allocate(g_root_inode, flags, 0, NULL, minfd, true);
if (fd2 < 0)
{
return fd2;
}
ret = fs_getfilep(fd2, &filep2);
#ifdef CONFIG_FDSAN
- f_tag_fdsan = filep2->f_tag_fdsan;
+ f_tag_fdsan = nx_fcntl(fd2, NX_GETTAG_FDSAN, 0);
Review Comment:
fdcheck seems to work much like fdsan, it encodes some information to the
user fd and decodes the actual fd from the user fd when the kernel needs it.
There seem to be many hidden paths that don't do fdcheck_restore which is
causing crashes for me.
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