diff options
| author |   Wang Cheng <wanngchenng@gmail.com> | 2022-05-16 17:22:41 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-19 17:44:25 +0200 |
| commit | 0458e5428e5e959d201a40ffe71d762a79ecedc4 (patch) | |
| tree | f4ba84eb036503f4d7bf4ba206b12af893918ffe /drivers/staging/rtl8712/usb_intf.c | |
| parent | staging: rtl8712: fix uninit-value in usb_read8() and friends (diff) | |
| download | linux-dev-0458e5428e5e959d201a40ffe71d762a79ecedc4.tar.xz linux-dev-0458e5428e5e959d201a40ffe71d762a79ecedc4.zip | |
staging: rtl8712: fix uninit-value in r871xu_drv_init()
When 'tmpU1b' returns from r8712_read8(padapter, EE_9346CR) is 0,
'mac[6]' will not be initialized.
BUG: KMSAN: uninit-value in r871xu_drv_init+0x2d54/0x3070 drivers/staging/rtl8712/usb_intf.c:541
r871xu_drv_init+0x2d54/0x3070 drivers/staging/rtl8712/usb_intf.c:541
usb_probe_interface+0xf19/0x1600 drivers/usb/core/driver.c:396
really_probe+0x653/0x14b0 drivers/base/dd.c:596
__driver_probe_device+0x3e9/0x530 drivers/base/dd.c:752
driver_probe_device drivers/base/dd.c:782 [inline]
__device_attach_driver+0x79f/0x1120 drivers/base/dd.c:899
bus_for_each_drv+0x2d6/0x3f0 drivers/base/bus.c:427
__device_attach+0x593/0x8e0 drivers/base/dd.c:970
device_initial_probe+0x4a/0x60 drivers/base/dd.c:1017
bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487
device_add+0x1fff/0x26e0 drivers/base/core.c:3405
usb_set_configuration+0x37e9/0x3ed0 drivers/usb/core/message.c:2170
usb_generic_driver_probe+0x13c/0x300 drivers/usb/core/generic.c:238
usb_probe_device+0x309/0x570 drivers/usb/core/driver.c:293
really_probe+0x653/0x14b0 drivers/base/dd.c:596
__driver_probe_device+0x3e9/0x530 drivers/base/dd.c:752
driver_probe_device drivers/base/dd.c:782 [inline]
__device_attach_driver+0x79f/0x1120 drivers/base/dd.c:899
bus_for_each_drv+0x2d6/0x3f0 drivers/base/bus.c:427
__device_attach+0x593/0x8e0 drivers/base/dd.c:970
device_initial_probe+0x4a/0x60 drivers/base/dd.c:1017
bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487
device_add+0x1fff/0x26e0 drivers/base/core.c:3405
usb_new_device+0x1b8e/0x2950 drivers/usb/core/hub.c:2566
hub_port_connect drivers/usb/core/hub.c:5358 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5502 [inline]
port_event drivers/usb/core/hub.c:5660 [inline]
hub_event+0x58e3/0x89e0 drivers/usb/core/hub.c:5742
process_one_work+0xdb6/0x1820 kernel/workqueue.c:2307
worker_thread+0x10b3/0x21e0 kernel/workqueue.c:2454
kthread+0x3c7/0x500 kernel/kthread.c:377
ret_from_fork+0x1f/0x30
Local variable mac created at:
r871xu_drv_init+0x1771/0x3070 drivers/staging/rtl8712/usb_intf.c:394
usb_probe_interface+0xf19/0x1600 drivers/usb/core/driver.c:396
KMSAN: uninit-value in r871xu_drv_init
https://syzkaller.appspot.com/bug?id=3cd92b1d85428b128503bfa7a250294c9ae00bd8
Reported-by: <syzbot+6f5ecd144854c0d8580b@syzkaller.appspotmail.com>
Tested-by: <syzbot+6f5ecd144854c0d8580b@syzkaller.appspotmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Wang Cheng <wanngchenng@gmail.com>
Link: https://lore.kernel.org/r/14c3886173dfa4597f0704547c414cfdbcd11d16.1652618244.git.wanngchenng@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/staging/rtl8712/usb_intf.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/staging/rtl8712/usb_intf.c b/drivers/staging/rtl8712/usb_intf.c index 8cbd419dd868..37364d3101e2 100644 --- a/drivers/staging/rtl8712/usb_intf.c +++ b/drivers/staging/rtl8712/usb_intf.c @@ -536,13 +536,13 @@ static int r871xu_drv_init(struct usb_interface *pusb_intf, } else { AutoloadFail = false; } - if (((mac[0] == 0xff) && (mac[1] == 0xff) && + if ((!AutoloadFail) || + ((mac[0] == 0xff) && (mac[1] == 0xff) && (mac[2] == 0xff) && (mac[3] == 0xff) && (mac[4] == 0xff) && (mac[5] == 0xff)) || ((mac[0] == 0x00) && (mac[1] == 0x00) && (mac[2] == 0x00) && (mac[3] == 0x00) && - (mac[4] == 0x00) && (mac[5] == 0x00)) || - (!AutoloadFail)) { + (mac[4] == 0x00) && (mac[5] == 0x00))) { mac[0] = 0x00; mac[1] = 0xe0; mac[2] = 0x4c; |