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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2018-02-07 02:39:13 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-02-07 05:32:45 +0300 |
| commit | 60c9d92f887f4606d363fece7a36c92664dc64c6 (patch) | |
| tree | 781eee237ca913cbb4e1b80d20c87226ee48f5b5 /fs/block_dev.c | |
| parent | 2d453e3b41c80d1a2c02b02d672f5dcd73f95a12 (diff) | |
| download | linux-60c9d92f887f4606d363fece7a36c92664dc64c6.tar.xz | |
elf: fix NT_FILE integer overflow
If vm.max_map_count bumped above 2^26 (67+ mil) and system has enough RAM
to allocate all the VMAs (~12.8 GB on Fedora 27 with 200-byte VMAs), then
it should be possible to overflow 32-bit "size", pass paranoia check,
allocate very little vmalloc space and oops while writing into vmalloc
guard page...
But I didn't test this, only coredump of regular process.
Link: http://lkml.kernel.org/r/20180112203427.GA9109@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/block_dev.c')
0 files changed, 0 insertions, 0 deletions