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author | Pan Bian <bianpan2016@163.com> | 2017-04-23 10:23:21 (GMT) |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-05 12:40:30 (GMT) |
commit | 0e55856b8f2918f3a6b8caf3c72867ee88f816dd (patch) | |
tree | 6de1b89b34b1de032f1a27609b0e293c48f909ac /arch/arm/kvm/guest.c | |
parent | f0c31c674abdf563d2ad5d9ecfcad8d237f939f0 (diff) | |
download | linux-0e55856b8f2918f3a6b8caf3c72867ee88f816dd.tar.xz |
iommu/amd: Fix incorrect error handling in amd_iommu_bind_pasid()
commit 73dbd4a4230216b6a5540a362edceae0c9b4876b upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm/kvm/guest.c')
0 files changed, 0 insertions, 0 deletions