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(parent: 5a7ad11) | patch
iommu/amd: Fix incorrect error handling in amd_iommu_bind_pasid()
authorPan Bian <bianpan2016@163.com>
Sun, 23 Apr 2017 10:23:21 +0000 (18:23 +0800)
committerJoerg Roedel <jroedel@suse.de>
Mon, 24 Apr 2017 10:33:34 +0000 (12:33 +0200)
commit73dbd4a4230216b6a5540a362edceae0c9b4876b
tree1af257e9a90628ab2e0e97ba87cbe342764fc455tree | snapshot (tar.gz zip)
parent5a7ad1146caa895ad718a534399e38bd2ba721b7commit | diff
iommu/amd: Fix incorrect error handling in amd_iommu_bind_pasid()

In function amd_iommu_bind_pasid(), the control flow jumps
to label out_free when pasid_state->mm and mm is NULL. And
mmput(mm) is called.  In function mmput(mm), mm is
referenced without validation. This will result in a NULL
dereference bug. This patch fixes the bug.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Fixes: f0aac63b873b ('iommu/amd: Don't hold a reference to mm_struct')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
drivers/iommu/amd_iommu_v2.c diff | blob | blame | history