Larry Finger <Larry.Finger@xxxxxxxxxxxx> writes: > Kernels built with CONFIG_KASAN=y report the following BUG for rtl8192cu > and rtl8192c-common: > > ================================================================== > BUG: KASAN: slab-out-of-bounds in rtl92c_dm_bt_coexist+0x858/0x1e40 > [rtl8192c_common] at addr ffff8801c90edb08 > Read of size 1 by task kworker/0:1/38 > page:ffffea0007243800 count:1 mapcount:0 mapping: (null) > index:0x0 compound_mapcount: 0 > flags: 0x8000000000004000(head) > page dumped because: kasan: bad access detected > CPU: 0 PID: 38 Comm: kworker/0:1 Not tainted 4.9.7-gentoo #3 > Hardware name: Gigabyte Technology Co., Ltd. To be filled by > O.E.M./Z77-DS3H, BIOS F11a 11/13/2013 > Workqueue: rtl92c_usb rtl_watchdog_wq_callback [rtlwifi] > 0000000000000000 ffffffff829eea33 ffff8801d7f0fa30 ffff8801c90edb08 > ffffffff824c0f09 ffff8801d4abee80 0000000000000004 0000000000000297 > ffffffffc070b57c ffff8801c7aa7c48 ffff880100000004 ffffffff000003e8 > Call Trace: > [<ffffffff829eea33>] ? dump_stack+0x5c/0x79 > [<ffffffff824c0f09>] ? kasan_report_error+0x4b9/0x4e0 > [<ffffffffc070b57c>] ? _usb_read_sync+0x15c/0x280 [rtl_usb] > [<ffffffff824c0f75>] ? __asan_report_load1_noabort+0x45/0x50 > [<ffffffffc06d7a88>] ? rtl92c_dm_bt_coexist+0x858/0x1e40 [rtl8192c_common] > [<ffffffffc06d7a88>] ? rtl92c_dm_bt_coexist+0x858/0x1e40 [rtl8192c_common] > [<ffffffffc06d0cbe>] ? rtl92c_dm_rf_saving+0x96e/0x1330 [rtl8192c_common] > ... > > The problem is due to rtl8192ce and rtl8192cu sharing routines, and having > different layouts of struct rtl_pci_priv, which is used by rtl8192ce, and > struct rtl_usb_priv, which is used by rtl8192cu. The problem was resolved > by placing the struct bt_coexist_info at the head of each of those private > areas. > > Reported-and-tested-by: Dmitry Osipenko <digetx@xxxxxxxxx> > Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx> > Cc: Stable <stable@xxxxxxxxxxxxxxx> # 4.0+ > Cc: Dmitry Osipenko <digetx@xxxxxxxxx> Patchwork incorrectly parsed this mail, my guess is because of the long '========' line: https://patchwork.kernel.org/patch/9556171/ So I applied this manually to wireless-drivers-next: 6773386f977c rtlwifi: rtl8192c-common: Fix "BUG: KASAN: Thanks. -- Kalle Valo
