From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Pan Bian <bianpan2016@163.com>,
Joerg Roedel <jroedel@suse.de>
Subject: [PATCH 3.18 33/36] iommu/amd: Fix incorrect error handling in amd_iommu_bind_pasid()
Date: Mon, 3 Jul 2017 15:34:30 +0200 [thread overview]
Message-ID: <20170703133257.596104592@linuxfoundation.org> (raw)
In-Reply-To: <20170703133256.260692013@linuxfoundation.org>
3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Pan Bian <bianpan2016@163.com>
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>
---
drivers/iommu/amd_iommu_v2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/iommu/amd_iommu_v2.c
+++ b/drivers/iommu/amd_iommu_v2.c
@@ -701,9 +701,9 @@ out_clear_state:
out_unregister:
mmu_notifier_unregister(&pasid_state->mn, mm);
+ mmput(mm);
out_free:
- mmput(mm);
free_pasid_state(pasid_state);
out:
next prev parent reply other threads:[~2017-07-03 13:36 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-03 13:33 [PATCH 3.18 00/36] 3.18.60-stable review Greg Kroah-Hartman
2017-07-03 13:33 ` [PATCH 3.18 01/36] xhci: fix deadlock at host remove by running watchdog correctly Greg Kroah-Hartman
2017-07-03 13:33 ` [PATCH 3.18 02/36] ipv6: release dst on error in ip6_dst_lookup_tail Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 03/36] netfilter: xt_TCPMSS: add more sanity tests on tcph->doff Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 04/36] netfilter: synproxy: fix conntrackd interaction Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 05/36] net: dont call strlen on non-terminated string in dev_set_alias() Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 06/36] decnet: dn_rtmsg: Improve input length sanitization in dnrmg_receive_user_skb Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 07/36] Fix an intermittent pr_emerg warning about lo becoming free Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 08/36] net: caif: Fix a sleep-in-atomic bug in cfpkt_create_pfx Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 09/36] igmp: acquire pmc lock for ip_mc_clear_src() Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 10/36] igmp: add a missing spin_lock_init() Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 11/36] ipv6: fix calling in6_ifa_hold incorrectly for dad work Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 12/36] decnet: always not take dst->__refcnt when inserting dst into hash table Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 13/36] net: 8021q: Fix one possible panic caused by BUG_ON in free_netdev Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 14/36] NFSv4: fix a reference leak caused WARNING messages Greg Kroah-Hartman
2017-07-03 14:33 ` Trond Myklebust
2017-07-03 15:02 ` gregkh
2017-07-03 13:34 ` [PATCH 3.18 15/36] arm64: cpuinfo: Missing NULL terminator in compat_hwcap_str Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 16/36] MIPS: Avoid accidental raw backtrace Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 17/36] MIPS: pm-cps: Drop manual cache-line alignment of ready_count Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 18/36] MIPS: Fix IRQ tracing & lockdep when rescheduling Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 19/36] ALSA: hda - set input_path bitmap to zero after moving it to new place Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 20/36] drm/vmwgfx: Free hash table allocated by cmdbuf managed res mgr Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 21/36] usb: gadget: f_fs: Fix possibe deadlock Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 22/36] sysctl: enable strict writes Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 23/36] mm: numa: avoid waiting on freed migrated pages Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 25/36] net: korina: Fix NAPI versus resources freeing Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 27/36] xfrm: fix stack access out of bounds with CONFIG_XFRM_SUB_POLICY Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 28/36] xfrm: NULL dereference on allocation failure Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 29/36] xfrm: Oops on error in pfkey_msg2xfrm_state() Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 30/36] watchdog: bcm281xx: Fix use of uninitialized spinlock Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 31/36] ARM: 8685/1: ensure memblock-limit is pmd-aligned Greg Kroah-Hartman
2017-07-03 13:34 ` [PATCH 3.18 32/36] iommu/vt-d: Dont over-free page table directories Greg Kroah-Hartman
2017-07-03 13:34 ` Greg Kroah-Hartman [this message]
2017-07-03 13:34 ` [PATCH 3.18 34/36] cpufreq: s3c2416: double free on driver init error path Greg Kroah-Hartman
2017-07-03 19:34 ` [PATCH 3.18 00/36] 3.18.60-stable review Guenter Roeck
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