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authorBjørn Mork <bjorn@mork.no>2019-06-24 18:45:11 +0200
committerDavid S. Miller <davem@davemloft.net>2019-06-24 10:07:12 -0700
commit904d88d743b0c94092c5117955eab695df8109e8 (patch)
tree2918cbe3bf85603967f3447546f7430067a76915 /drivers/net
parent4f07b80c973348a99b5d2a32476a2e7877e94a05 (diff)
downloadlinux-904d88d743b0c94092c5117955eab695df8109e8.tar.bz2
qmi_wwan: Fix out-of-bounds read
The syzbot reported Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xca/0x13e lib/dump_stack.c:113 print_address_description+0x67/0x231 mm/kasan/report.c:188 __kasan_report.cold+0x1a/0x32 mm/kasan/report.c:317 kasan_report+0xe/0x20 mm/kasan/common.c:614 qmi_wwan_probe+0x342/0x360 drivers/net/usb/qmi_wwan.c:1417 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 really_probe+0x281/0x660 drivers/base/dd.c:509 driver_probe_device+0x104/0x210 drivers/base/dd.c:670 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777 bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454 Caused by too many confusing indirections and casts. id->driver_info is a pointer stored in a long. We want the pointer here, not the address of it. Thanks-to: Hillf Danton <hdanton@sina.com> Reported-by: syzbot+b68605d7fadd21510de1@syzkaller.appspotmail.com Cc: Kristian Evensen <kristian.evensen@gmail.com> Fixes: e4bf63482c30 ("qmi_wwan: Add quirk for Quectel dynamic config") Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/usb/qmi_wwan.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
index d080f8048e52..8b4ad10cf940 100644
--- a/drivers/net/usb/qmi_wwan.c
+++ b/drivers/net/usb/qmi_wwan.c
@@ -1482,7 +1482,7 @@ static int qmi_wwan_probe(struct usb_interface *intf,
* different. Ignore the current interface if the number of endpoints
* equals the number for the diag interface (two).
*/
- info = (void *)&id->driver_info;
+ info = (void *)id->driver_info;
if (info->data & QMI_WWAN_QUIRK_QUECTEL_DYNCFG) {
if (desc->bNumEndpoints == 2)