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bd771cf5c4
Zheyu Ma reported this crash in the sm712fb driver when reading three bytes from the framebuffer: BUG: unable to handle page fault for address: ffffc90001ffffff RIP: 0010:smtcfb_read+0x230/0x3e0 Call Trace: vfs_read+0x198/0xa00 ? do_sys_openat2+0x27d/0x350 ? __fget_light+0x54/0x340 ksys_read+0xce/0x190 do_syscall_64+0x43/0x90 Fix it by removing the open-coded endianess fixup-code and by moving the pointer post decrement out the fb_readl() function. Reported-by: Zheyu Ma <zheyuma97@gmail.com> Signed-off-by: Helge Deller <deller@gmx.de> Tested-by: Zheyu Ma <zheyuma97@gmail.com> Cc: stable@vger.kernel.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.