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Daniel Scheller
1502efd2d5
Brought to attention by Matthias Schwarzott <zzam@gentoo.org> by fixing possible use-after-free faults in some demod drivers: In ddb_input_detach(), the i2c_client is unregistered and removed before dvb frontends are unregistered and detached. While no use-after-free issue was observed so far, there is another issue with this: dvb->attached keeps track of the state of the input/output registration, and the i2c_client unregistration takes place only if everything was successful (dvb->attached == 0x31). If for some reason an error occurred during the frontend setup, that value stays at 0x20. In the following error handling and cleanup, ddb_input_detach() will skip down to that state, leaving the i2c_client registered, causing refcount issues. Fix this by moving the i2c_client deregistration down to case 0x20. Cc: Matthias Schwarzott <zzam@gentoo.org> Signed-off-by: Daniel Scheller <d.scheller@gmx.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.