63045bfd3c
Commit2c865a8a28("netfilter: nf_tables: add rule blob layout") never initialized the new 'data_size' variable. I'm not sure how it ever worked, but it might have worked almost by accident - gcc seems to occasionally miss these kinds of 'variable used uninitialized' situations, but I've seen it do so because it ended up zero-initializing them due to some other simplification. But clang is very unhappy about it all, and correctly reports net/netfilter/nf_tables_api.c:8278:4: error: variable 'data_size' is uninitialized when used here [-Werror,-Wuninitialized] data_size += sizeof(*prule) + rule->dlen; ^~~~~~~~~ net/netfilter/nf_tables_api.c:8263:30: note: initialize the variable 'data_size' to silence this warning unsigned int size, data_size; ^ = 0 1 error generated. and this fix just initializes 'data_size' to zero before the loop. Fixes:2c865a8a28("netfilter: nf_tables: add rule blob layout") Cc: Pablo Neira Ayuso <pablo@netfilter.org> Cc: Jakub Kicinski <kuba@kernel.org> Cc: David Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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.