diff options
| author | Ning Qiang <sohu0106@126.com> | 2022-07-13 23:37:34 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-11 12:48:41 +0200 |
| commit | 599f4c7b5dec1de6a1a2c4ddbd568da3dd4028e5 (patch) | |
| tree | f566924c395d165292667001457cf99623519338 | |
| parent | 56d3612583e993bdd0e4b71e16e906ba460c4042 (diff) | |
macintosh/adb: fix oob read in do_adb_query() function
commit fd97e4ad6d3b0c9fce3bca8ea8e6969d9ce7423b upstream.
In do_adb_query() function of drivers/macintosh/adb.c, req->data is copied
form userland. The parameter "req->data[2]" is missing check, the array
size of adb_handler[] is 16, so adb_handler[req->data[2]].original_address and
adb_handler[req->data[2]].handler_id will lead to oob read.
Cc: stable <stable@kernel.org>
Signed-off-by: Ning Qiang <sohu0106@126.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220713153734.2248-1-sohu0106@126.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/macintosh/adb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c index 76e98f0f7a3e..2f1952fd3a45 100644 --- a/drivers/macintosh/adb.c +++ b/drivers/macintosh/adb.c @@ -645,7 +645,7 @@ do_adb_query(struct adb_request *req) switch(req->data[1]) { case ADB_QUERY_GETDEVINFO: - if (req->nbytes < 3) + if (req->nbytes < 3 || req->data[2] >= 16) break; mutex_lock(&adb_handler_mutex); req->reply[0] = adb_handler[req->data[2]].original_address; |