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In the Linux kernel, the following vulnerability has been resolved:
usb: atm: cxacru: fix a flaw in existing endpoint checks
Syzbot once again identified a flaw in usb endpoint checking, see [1].
This time the issue stems from a commit authored by me (2eabb655a968
("usb: atm: cxacru: fix endpoint checking in cxacru_bind()")).
While using usb_find_common_endpoints() may usually be enough to
discard devices with wrong endpoints, in this case one needs more
than just finding and identifying the sufficient number of endpoints
of correct types - one needs to check the endpoint's address as well.
Since cxacru_bind() fills URBs with CXACRU_EP_CMD address in mind,
switch the endpoint verification approach to usb_check_XXX_endpoints()
instead to fix incomplete ep testing.
[1] Syzbot report:
usb 5-1: BOGUS urb xfer, pipe 3 != type 1
WARNING: CPU: 0 PID: 1378 at drivers/usb/core/urb.c:504 usb_submit_urb+0xc4e/0x18c0 drivers/usb/core/urb.c:503
...
RIP: 0010:usb_submit_urb+0xc4e/0x18c0 drivers/usb/core/urb.c:503
...
Call Trace:
<TASK>
cxacru_cm+0x3c8/0xe50 drivers/usb/atm/cxacru.c:649
cxacru_card_status drivers/usb/atm/cxacru.c:760 [inline]
cxacru_bind+0xcf9/0x1150 drivers/usb/atm/cxacru.c:1223
usbatm_usb_probe+0x314/0x1d30 drivers/usb/atm/usbatm.c:1058
cxacru_usb_probe+0x184/0x220 drivers/usb/atm/cxacru.c:1377
usb_probe_interface+0x641/0xbb0 drivers/usb/core/driver.c:396
really_probe+0x2b9/0xad0 drivers/base/dd.c:658
__driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
driver_probe_device+0x50/0x430 drivers/base/dd.c:830
...
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Reference |
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https://git.kernel.org/stable/c/197e78076c5ecd895f109158c4ea2954b9919af6
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Reference |
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https://git.kernel.org/stable/c/319529e0356bd904528c64647725a2272d297c83
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Reference |
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https://git.kernel.org/stable/c/903b80c21458bb1e34c3a78c5fdc553821e357f8
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Reference |
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https://git.kernel.org/stable/c/a0475a885d69849b1ade38add6d64338dfa83a8f
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Reference |
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https://git.kernel.org/stable/c/bf4409f84023b52b5e9b36c0a071a121eee42138
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Reference |
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https://git.kernel.org/stable/c/c90aad369899a607cfbc002bebeafd51e31900cd
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Reference |
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https://git.kernel.org/stable/c/cfc295f7cccf66cbd5123416bcf1bee2e1bd37de
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Reference |
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https://git.kernel.org/stable/c/dcd592ab9dd8a2bfc36e75583b9006db2a77ec24
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