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author | Jungseung Lee <js07.lee@gmail.com> | 2014-12-10 15:52:16 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-10 17:41:12 -0800 |
commit | 52f5592e549c013feb9bb71cab3e6fd624633577 (patch) | |
tree | 55bdcdd7e82121f8c8e071562917ce9dbc964efe /include/trace | |
parent | f7e1ad1a1e23af97419cd8d5adff67fedf7cf169 (diff) | |
download | linux-52f5592e549c013feb9bb71cab3e6fd624633577.tar.bz2 |
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 <js07.lee@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/trace')
0 files changed, 0 insertions, 0 deletions