From: Jungseung Lee Date: Wed, 10 Dec 2014 23:52:16 +0000 (-0800) Subject: fs/binfmt_elf.c: fix internal inconsistency relating to vma dump size X-Git-Tag: omap-for-v3.20/drop-legacy-3517~139^2~66 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=52f5592e549c013feb9bb71cab3e6fd624633577;p=pandora-kernel.git fs/binfmt_elf.c: fix internal inconsistency relating to vma dump size vma_dump_size() has been used several times on actual dumper and it is supposed to return the same value for the same vma. But vma_dump_size() could return different values for same vma. The known problem case is concurrent shared memory removal. If a vma is used for a shared memory and that shared memory is removed between writing program header and dumping vma memory, this will result in a dump file which is internally consistent. To fix the problem, we set baseline to get dump size and store the size into vma_filesz and always use the same vma dump size which is stored in vma_filsz. The consistnecy with reality is not actually guranteed, but it's tolerable since that is fully consistent with base line. Signed-off-by: Jungseung Lee Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed