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e6eb815bec
commit 2bbcaaee1fcbd83272e29f31e2bb7e70d8c49e05 upstream. In ath9k_hif_usb_rx_cb interface number is assumed to be 0. usb_ifnum_to_if(urb->dev, 0) But it isn't always true. The case reported by syzbot: https://lore.kernel.org/linux-usb/000000000000666c9c05a1c05d12@google.com usb 2-1: new high-speed USB device number 2 using dummy_hcd usb 2-1: config 1 has an invalid interface number: 2 but max is 0 usb 2-1: config 1 has no interface number 0 usb 2-1: New USB device found, idVendor=0cf3, idProduct=9271, bcdDevice= 1.08 usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 general protection fault, probably for non-canonical address 0xdffffc0000000015: 0000 [#1] SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000a8-0x00000000000000af] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc5-syzkaller #0 Call Trace __usb_hcd_giveback_urb+0x29a/0x550 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1716 dummy_timer+0x1258/0x32ae drivers/usb/gadget/udc/dummy_hcd.c:1966 call_timer_fn+0x195/0x6f0 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x5f9/0x1500 kernel/time/timer.c:1786 __do_softirq+0x21e/0x950 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x178/0x1a0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x141/0x540 arch/x86/kernel/apic/apic.c:1146 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 Reported-and-tested-by: syzbot+40d5d2e8a4680952f042@syzkaller.appspotmail.com Signed-off-by: Qiujun Huang <hqjagain@gmail.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/20200404041838.10426-6-hqjagain@gmail.com Cc: Viktor Jägersküpper <viktor_jaegerskuepper@freenet.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.