WARNING in cxacru_cm/usb_submit_urb

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: d6ff8147 usb: gadget: add raw-gadget interface
git tree: https://github.com/google/kasan.git usb-fuzzer
console output: https://syzkaller.appspot.com/x/log.txt?x=10c21731e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=90a3d9bed5648419
dashboard link: https://syzkaller.appspot.com/bug?extid=00c18ee8497dd3be6ade
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16942bb5e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14b4aa2de00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+00c18e...@syzkaller.appspotmail.com

usb 1-1: New USB device found, idVendor=0572, idProduct=cb00, bcdDevice=41.00
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
usb 1-1: string descriptor 0 read error: -71
------------[ cut here ]------------
usb 1-1: BOGUS urb xfer, pipe 1 != type 3
WARNING: CPU: 0 PID: 102 at drivers/usb/core/urb.c:478 usb_submit_urb+0x1188/0x1460 drivers/usb/core/urb.c:478
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 102 Comm: kworker/0:2 Not tainted 5.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0xef/0x16e lib/dump_stack.c:118
panic+0x2aa/0x6e1 kernel/panic.c:221
__warn.cold+0x2f/0x30 kernel/panic.c:582
report_bug+0x27b/0x2f0 lib/bug.c:195
fixup_bug arch/x86/kernel/traps.c:174 [inline]
fixup_bug arch/x86/kernel/traps.c:169 [inline]
do_error_trap+0x12b/0x1e0 arch/x86/kernel/traps.c:267
do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:usb_submit_urb+0x1188/0x1460 drivers/usb/core/urb.c:478
Code: 4d 85 ed 74 46 e8 18 ce dd fd 4c 89 f7 e8 d0 5c 17 ff 41 89 d8 44 89 e1 4c 89 ea 48 89 c6 48 c7 c7 e0 e7 3b 86 e8 a0 5f b2 fd <0f> 0b e9 20 f4 ff ff e8 ec cd dd fd 0f 1f 44 00 00 e8 e2 cd dd fd
RSP: 0018:ffff8881d4f56fb8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff812977dd RDI: ffffed103a9eade9
RBP: ffff8881d4fa9750 R08: ffff8881d6c14980 R09: ffffed103b646248
R10: ffffed103b646247 R11: ffff8881db23123f R12: 0000000000000001
R13: ffff8881cf17d948 R14: ffff8881c44cd0a0 R15: ffff8881d4fa9200
cxacru_cm+0x3c2/0x8f0 drivers/usb/atm/cxacru.c:650
cxacru_card_status+0x22/0xe0 drivers/usb/atm/cxacru.c:761
cxacru_bind+0x7ab/0x119d drivers/usb/atm/cxacru.c:1213
usbatm_usb_probe+0x2d7/0x1958 drivers/usb/atm/usbatm.c:1053
cxacru_usb_probe+0xdf/0x1e0 drivers/usb/atm/cxacru.c:1367
usb_probe_interface+0x310/0x800 drivers/usb/core/driver.c:374
really_probe+0x290/0xac0 drivers/base/dd.c:551
driver_probe_device+0x223/0x350 drivers/base/dd.c:724
__device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831
bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
__device_attach+0x217/0x390 drivers/base/dd.c:897
bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
device_add+0x1459/0x1bf0 drivers/base/core.c:2487
usb_set_configuration+0xe47/0x17d0 drivers/usb/core/message.c:2023
usb_generic_driver_probe+0x9d/0xe0 drivers/usb/core/generic.c:241
usb_probe_device+0xd9/0x230 drivers/usb/core/driver.c:272
really_probe+0x290/0xac0 drivers/base/dd.c:551
driver_probe_device+0x223/0x350 drivers/base/dd.c:724
__device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831
bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
__device_attach+0x217/0x390 drivers/base/dd.c:897
bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
device_add+0x1459/0x1bf0 drivers/base/core.c:2487
usb_new_device.cold+0x540/0xcd0 drivers/usb/core/hub.c:2544
hub_port_connect drivers/usb/core/hub.c:5191 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5331 [inline]
port_event drivers/usb/core/hub.c:5477 [inline]
hub_event+0x21cb/0x4300 drivers/usb/core/hub.c:5559
process_one_work+0x94b/0x1620 kernel/workqueue.c:2264
worker_thread+0x96/0xe20 kernel/workqueue.c:2410
kthread+0x318/0x420 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches

[Nikita Zhandarovich]

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
---
drivers/usb/atm/cxacru.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/atm/cxacru.c b/drivers/usb/atm/cxacru.c
index 4ce7cba2b48a..8a8e94a601c6 100644
--- a/drivers/usb/atm/cxacru.c
+++ b/drivers/usb/atm/cxacru.c
@@ -1131,7 +1131,8 @@ static int cxacru_bind(struct usbatm_data *usbatm_instance,
struct cxacru_data *instance;
struct usb_device *usb_dev = interface_to_usbdev(intf);
struct usb_host_endpoint *cmd_ep = usb_dev->ep_in[CXACRU_EP_CMD];
- int ret;
+ struct usb_endpoint_descriptor *in, *out;
+ int ret = -1;

/* instance init */
instance = kzalloc(sizeof(*instance), GFP_KERNEL);
@@ -1177,6 +1178,19 @@ static int cxacru_bind(struct usbatm_data *usbatm_instance,
goto fail;
}

+ if (usb_endpoint_xfer_int(&cmd_ep->desc))
+ ret = usb_find_common_endpoints(intf->cur_altsetting,
+ NULL, NULL, &in, &out);
+ else
+ ret = usb_find_common_endpoints(intf->cur_altsetting,
+ &in, &out, NULL, NULL);
+
+ if (ret) {
+ usb_dbg(usbatm_instance, "cxacru_bind: interface has incorrect endpoints\n");
+ ret = -ENODEV;
+ goto fail;
+ }
+
if ((cmd_ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
== USB_ENDPOINT_XFER_INT) {
usb_fill_int_urb(instance->rcv_urb,

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: syzbot+00c18e...@syzkaller.appspotmail.com

Tested on:

commit: 2bfcfd58 Merge tag 'pmdomain-v6.10-rc1' of git://git.k..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=1453713a980000
kernel config: https://syzkaller.appspot.com/x/.config?x=6205b72d5900b927
dashboard link: https://syzkaller.appspot.com/bug?extid=00c18ee8497dd3be6ade
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=12e6e572980000

Note: testing is done by a robot and is best-effort only.

[Nikita Zhandarovich]

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
---

drivers/usb/atm/cxacru.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/drivers/usb/atm/cxacru.c b/drivers/usb/atm/cxacru.c
index 4ce7cba2b48a..8f3b9a0a38e1 100644
--- a/drivers/usb/atm/cxacru.c
+++ b/drivers/usb/atm/cxacru.c
@@ -1131,6 +1131,7 @@ static int cxacru_bind(struct usbatm_data *usbatm_instance,

struct cxacru_data *instance;
struct usb_device *usb_dev = interface_to_usbdev(intf);
struct usb_host_endpoint *cmd_ep = usb_dev->ep_in[CXACRU_EP_CMD];

+ struct usb_endpoint_descriptor *in, *out;

int ret;

/* instance init */

@@ -1177,6 +1178,19 @@ static int cxacru_bind(struct usbatm_data *usbatm_instance,
goto fail;
}

+ if (usb_endpoint_xfer_int(&cmd_ep->desc))
+ ret = usb_find_common_endpoints(intf->cur_altsetting,
+ NULL, NULL, &in, &out);
+ else
+ ret = usb_find_common_endpoints(intf->cur_altsetting,
+ &in, &out, NULL, NULL);
+
+ if (ret) {

+ usb_err(usbatm_instance, "cxacru_bind: interface has incorrect endpoints\n");

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: syzbot+00c18e...@syzkaller.appspotmail.com

Tested on:

commit: 771ed661 Merge tag 'clk-fixes-for-linus' of git://git...

git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

console output: https://syzkaller.appspot.com/x/log.txt?x=14a0c3fc980000
kernel config: https://syzkaller.appspot.com/x/.config?x=67ede96756900c7c

dashboard link: https://syzkaller.appspot.com/bug?extid=00c18ee8497dd3be6ade
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

patch: https://syzkaller.appspot.com/x/patch.diff?x=1371f0ca980000