Al Viro 1171ceccab protect the fetch of ->fd[fd] in do_dup2() from mispredictions
commit 8aa37bde1a7b645816cda8b80df4753ecf172bf1 upstream.

both callers have verified that fd is not greater than ->max_fds;
however, misprediction might end up with
        tofree = fdt->fd[fd];
being speculatively executed.  That's wrong for the same reasons
why it's wrong in close_fd()/file_close_fd_locked(); the same
solution applies - array_index_nospec(fd, fdt->max_fds) could differ
from fd only in case of speculative execution on mispredicted path.

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-11 12:57:58 +02:00
..
2024-05-29 09:25:15 -07:00
2024-07-02 21:23:00 +02:00
2024-01-11 20:11:35 -08:00
2024-05-13 14:14:05 -07:00
2024-05-21 09:51:42 -07:00
2024-08-03 09:00:45 +02:00
2024-03-27 13:17:15 +01:00
2024-04-23 13:27:43 +02:00
2024-03-12 20:03:34 -07:00
2024-05-02 20:35:57 +02:00
2023-10-30 19:28:19 -10:00
2024-05-21 09:51:42 -07:00
2024-05-23 12:04:36 -07:00
2024-04-25 20:56:20 -07:00
2024-07-11 09:03:28 -07:00
2024-05-10 08:26:31 +02:00
2024-03-12 20:03:34 -07:00
2024-03-15 09:00:09 -07:00
2024-05-02 20:35:57 +02:00
2024-04-17 13:49:44 +02:00
2024-03-11 10:21:06 -07:00
2024-03-13 12:53:53 -07:00
2024-07-01 09:22:08 -07:00
2024-02-02 13:11:49 +01:00
2024-03-12 20:03:34 -07:00
2024-05-02 16:28:20 +02:00
2024-05-24 13:34:07 +02:00
2024-03-26 09:01:18 +01:00
2024-04-10 16:23:02 -06:00
2024-02-15 23:43:47 -05:00