在 2021/12/2 上午11:26, Andrew Morton 写道:
>> Delete the WARN_ON() and return NULL directly for oversized parameter
>> in kvmalloc() calls.
>> Also add unlikely().
>>
>> Fixes: 7661809d493b ("mm: don't allow oversized kvmalloc() calls")
>> Signed-off-by: Bixuan Cui<cuibixuan@linux.alibaba.com>
>> ---
>> There are a lot of oversize warnings and patches about kvmalloc() calls
>> recently. Maybe these warnings are not very necessary.
> Or maybe they are.  Please let's take a look at these warnings, one at
> a time.  If a large number of them are bogus then sure, let's disable
> the runtime test.  But perhaps it's the case that calling code has
> genuine issues and should be repaired.
Such as：

https://syzkaller.appspot.com/bug?id=24452f89446639c901ac07379ccc702808471e8e

https://syzkaller.appspot.com/bug?id=f7c5a86e747f9b7ce333e7295875cd4ede2c7a0d

https://syzkaller.appspot.com/bug?id=8f306f3db150657a1f6bbe1927467084531602c7

https://syzkaller.appspot.com/bug?id=6f30adb592d476978777a1125d1f680edfc23e00

https://syzkaller.appspot.com/bug?id=4c9ab8c7d0f8b551950db06559dc9cde4119ac83