https://github.com/torvalds/linux
Revision a4b98a7512f18534ce33a7e98e49115af59ffa00 authored by Vamsi Krishna Samavedam on 30 November 2020, 20:34:53 UTC, committed by Greg Kroah-Hartman on 04 December 2020, 15:09:10 UTC
The function may be unbound causing the ffs_ep and its descriptors
to be freed while userspace is in the middle of an ioctl requesting
the same descriptors. Avoid dangling pointer reference by first
making a local copy of desctiptors before releasing the spinlock.
Fixes: c559a3534109 ("usb: gadget: f_fs: add ioctl returning ep descriptor")
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Vamsi Krishna Samavedam <vskrishn@codeaurora.org>
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20201130203453.28154-1-jackp@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 parent 45c5775
Tip revision: a4b98a7512f18534ce33a7e98e49115af59ffa00 authored by Vamsi Krishna Samavedam on 30 November 2020, 20:34:53 UTC
usb: gadget: f_fs: Use local copy of descriptors for userspace copy
usb: gadget: f_fs: Use local copy of descriptors for userspace copy
Tip revision: a4b98a7
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
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| usr | ||
| virt | ||
| .clang-format | -rw-r--r-- | 16.3 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 71 bytes |
| .gitattributes | -rw-r--r-- | 62 bytes |
| .gitignore | -rw-r--r-- | 1.8 KB |
| .mailmap | -rw-r--r-- | 17.7 KB |
| COPYING | -rw-r--r-- | 496 bytes |
| CREDITS | -rw-r--r-- | 98.0 KB |
| Kbuild | -rw-r--r-- | 1.3 KB |
| Kconfig | -rw-r--r-- | 555 bytes |
| MAINTAINERS | -rw-r--r-- | 562.3 KB |
| Makefile | -rw-r--r-- | 62.6 KB |
| README | -rw-r--r-- | 727 bytes |
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