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05 April 2024, 19:05:47 UTC
Revision e79ce9832316e09529b212a21278d68240ccbf1f authored by Liu Yuntao on 26 February 2022, 03:11:02 UTC, committed by Linus Torvalds on 26 February 2022, 17:51:17 UTC 
hugetlbfs: fix a truncation issue in hugepages parameter
 
When we specify a large number for node in hugepages parameter, it may
be parsed to another number due to truncation in this statement:

	node = tmp;

For example, add following parameter in command line:

	hugepagesz=1G hugepages=4294967297:5

and kernel will allocate 5 hugepages for node 1 instead of ignoring it.

I move the validation check earlier to fix this issue, and slightly
simplifies the condition here.

Link: https://lkml.kernel.org/r/20220209134018.8242-1-liuyuntao10@huawei.com
Fixes: b5389086ad7be0 ("hugetlbfs: extend the definition of hugepages parameter to support node allocation")
Signed-off-by: Liu Yuntao <liuyuntao10@huawei.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 70effdc
History
Tip revision: e79ce9832316e09529b212a21278d68240ccbf1f authored by Liu Yuntao on 26 February 2022, 03:11:02 UTC
hugetlbfs: fix a truncation issue in hugepages parameter
Tip revision: e79ce98
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