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8420f71943
The change moving addr_lsb into the _sigfault union failed to take into account that _sigfault._addr_bnd._lower being a pointer forced the entire union to have pointer alignment. The fix for _sigfault._addr_bnd._lower having pointer alignment failed to take into account that m68k has a pointer alignment less than the size of a pointer. So simply making the padding members pointers changed the location of later members in the structure. Fix this by directly computing the needed size of the padding members, and making the padding members char arrays of the needed size. AKA if __alignof__(void *) is 1 sizeof(short) otherwise __alignof__(void *). Which should be exactly the same rules the compiler whould have used when computing the padding. I have tested this change by adding BUILD_BUG_ONs to m68k to verify the offset of every member of struct siginfo, and with those testing that the offsets of the fields in struct siginfo is the same before I changed the generic _sigfault member and after the correction to the _sigfault member. I have also verified that the x86 with it's own BUILD_BUG_ONs to verify the offsets of the siginfo members also compiles cleanly. Cc: stable@vger.kernel.org Reported-by: Eugene Syromiatnikov <esyr@redhat.com> Fixes: |
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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.