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13876f2a08
When the driver fails at ieee80211_alloc_hw() at the probe time, the driver will free the 'hw' which is not allocated, causing a bug. The following log can reveal it: [ 15.981294] BUG: KASAN: user-memory-access in mutex_is_locked+0xe/0x40 [ 15.981558] Read of size 8 at addr 0000000000001ab0 by task modprobe/373 [ 15.982583] Call Trace: [ 15.984282] ieee80211_free_hw+0x22/0x390 [ 15.984446] rtl8xxxu_probe+0x3a1/0xab30 [rtl8xxxu] Fix the bug by changing the order of the error handling. Signed-off-by: Zheyu Ma <zheyuma97@gmail.com> Signed-off-by: Kalle Valo <kvalo@kernel.org> Link: https://lore.kernel.org/r/20220716130444.2950690-1-zheyuma97@gmail.com
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.