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| author | Sidhartha Kumar <sidhartha.kumar@oracle.com> | 2022-04-21 16:35:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-04-21 20:01:10 -0700 |
| commit | 18d609daa546c919fd36b62a7b510c18de4b4af8 (patch) | |
| tree | d76cd1b8ae8a66653554e9b1b82e001e5d49eadd /tools/kvm/kvm_stat | |
| parent | 9c85a9bae267f6b5e5e374d0d023bbbe9db096d3 (diff) | |
| download | linux-18d609daa546c919fd36b62a7b510c18de4b4af8.tar.bz2 | |
selftest/vm: verify remap destination address in mremap_test
Because mremap does not have a MAP_FIXED_NOREPLACE flag, it can destroy
existing mappings. This causes a segfault when regions such as text are
remapped and the permissions are changed.
Verify the requested mremap destination address does not overlap any
existing mappings by using mmap's MAP_FIXED_NOREPLACE flag. Keep
incrementing the destination address until a valid mapping is found or
fail the current test once the max address is reached.
Link: https://lkml.kernel.org/r/20220420215721.4868-2-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/kvm/kvm_stat')
0 files changed, 0 insertions, 0 deletions