Unverified Commit ffbead4e authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!333 Fix PASID use-after-free issue 

Merge Pull Request from: @x56Jason 
 
This PR is to backport upstream fix for a PASID use-after-free issue that are missed in previous backporting.

## Intel-Kernel issue
#I67QJ2


## Test
Kernel build and boot

## Known Issue
N/A

## Default Config Change
N/A 
 
Link:https://gitee.com/openeuler/kernel/pulls/333

 
Reviewed-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parents 28cb7442 c4eff06f

kernel/fork.c

+1 −1
Original line number Diff line number Diff line
@@ -688,6 +688,7 @@ void __mmdrop(struct mm_struct *mm) 
	mmu_notifier_subscriptions_destroy(mm);

	check_mm(mm);

	put_user_ns(mm->user_ns);

	mm_pasid_drop(mm);

	free_mm(mm);

}

EXPORT_SYMBOL_GPL(__mmdrop);
@@ -1137,7 +1138,6 @@ static inline void __mmput(struct mm_struct *mm) 
	}

	if (mm->binfmt)

		module_put(mm->binfmt->module);

	mm_pasid_drop(mm);

	mmdrop(mm);

}