mirror of
https://github.com/torvalds/linux.git
synced 2026-09-25 21:21:09 -04:00
Phong Tran
f90bf1ece4
syzboot reported that https://syzkaller.appspot.com/bug?extid=fd2bd7df88c606eea4ef There is not consitency parameter in cluste_id_get/put calling. In case of getting the id with result is failure, the wusbhc->cluster_id will not be updated and this can not be used for wusb_cluster_id_put(). Tested report https://groups.google.com/d/msg/syzkaller-bugs/0znZopp3-9k/oxOrhLkLEgAJ Reproduce and gdb got the details: 139 addr = wusb_cluster_id_get(); (gdb) n 140 if (addr == 0) (gdb) print addr $1 = 254 '\376' (gdb) n 142 result = __hwahc_set_cluster_id(hwahc, addr); (gdb) print result $2 = -71 (gdb) break wusb_cluster_id_put Breakpoint 3 at 0xffffffff836e3f20: file drivers/usb/wusbcore/wusbhc.c, line 384. (gdb) s Thread 2 hit Breakpoint 3, wusb_cluster_id_put (id=0 '\000') at drivers/usb/wusbcore/wusbhc.c:384 384 id = 0xff - id; (gdb) n 385 BUG_ON(id >= CLUSTER_IDS); (gdb) print id $3 = 255 '\377' Reported-by: [email protected] Signed-off-by: Phong Tran <[email protected]> Cc: stable <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.