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| author | Yinghai Lu <yinghai@kernel.org> | 2010-03-01 18:48:52 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-03-01 23:23:02 -0800 |
| commit | dce46a04d55d6358d2d4ab44a4946a19f9425fe2 (patch) | |
| tree | 37436a42293f4a47a1fb989007531123baedefa5 /kernel/early_res.c | |
| parent | 81d0d950e5037a26b71e568ff235ff9e998f4ab3 (diff) | |
| download | linux-dce46a04d55d6358d2d4ab44a4946a19f9425fe2.tar.gz linux-dce46a04d55d6358d2d4ab44a4946a19f9425fe2.tar.bz2 linux-dce46a04d55d6358d2d4ab44a4946a19f9425fe2.zip | |
early_res: Need to save the allocation name in drop_range_partial()
During free_early_partial(), reserve_early_without_check() could end
extending the early_res area from __check_and_double_early_res(); as a
result, the location of the name for the current reservation could
change.
Therefore, we need to save a local copy of the name.
[ hpa: rewrote comment and checkin description ]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <4B8C7C94.7070000@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'kernel/early_res.c')
| -rw-r--r-- | kernel/early_res.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/kernel/early_res.c b/kernel/early_res.c index 9ab11cd84853..3cb2c661bb78 100644 --- a/kernel/early_res.c +++ b/kernel/early_res.c @@ -79,9 +79,19 @@ static void __init drop_range_partial(int i, u64 start, u64 end) /* make head segment */ early_res[i].end = common_start; if (old_end > common_end) { + char name[15]; + + /* + * Save a local copy of the name, since the + * early_res array could get resized inside + * reserve_early_without_check() -> + * __check_and_double_early_res(), which would + * make the current name pointer invalid. + */ + strncpy(name, early_res[i].name, + sizeof(early_res[i].name) - 1); /* add another for left over on tail */ - reserve_early_without_check(common_end, old_end, - early_res[i].name); + reserve_early_without_check(common_end, old_end, name); } return; } else { |