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CVE-2014-8159 infiniband: uverbs: unprotected physical memory access (rhbz 1181166 1200950)

This commit is contained in:
Josh Boyer 2015-03-12 08:47:38 -04:00
parent ac03c510f0
commit 32dcd3a968
2 changed files with 56 additions and 0 deletions
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47
IB-core-Prevent-integer-overflow-in-ib_umem_get-addr.patch Normal file
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@ -0,0 +1,47 @@
From: Shachar Raindel <raindel@mellanox.com>
Date: Sun, 4 Jan 2015 18:30:32 +0200
Subject: [PATCH] IB/core: Prevent integer overflow in ib_umem_get address
arithmetic
Properly verify that the resulting page aligned end address is larger
than both the start address and the length of the memory area
requested.
Both the start and length arguments for ib_umem_get are controlled by
the user. A misbehaving user can provide values which will cause an
integer overflow when calculating the page aligned end address.
This overflow can cause also miscalculation of the number of pages
mapped, and additional logic issues.
Issue: 470602
Change-Id: Iee88441db454af291fc5a376009d840603398d23
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
---
drivers/infiniband/core/umem.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
index aec7a6aa2951..8c014b5dab4c 100644
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -99,6 +99,14 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
if (dmasync)
dma_set_attr(DMA_ATTR_WRITE_BARRIER, &attrs);
+ /*
+ * If the combination of the addr and size requested for this memory
+ * region causes an integer overflow, return error.
+ */
+ if ((PAGE_ALIGN(addr + size) <= size) ||
+ (PAGE_ALIGN(addr + size) <= addr))
+ return ERR_PTR(-EINVAL);
+
if (!can_do_mlock())
return ERR_PTR(-EPERM);
--
2.1.0

9
kernel.spec
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@ -654,6 +654,9 @@ Patch26164: Revert-Input-synaptics-use-dmax-in-input_mt_assign_s.patch
#CVE-2015-2150 rhbz 1196266 1200397
Patch26165: xen-pciback-limit-guest-control-of-command-register.patch
#CVE-2014-8159 rhbz 1181166 1200950
Patch26167: IB-core-Prevent-integer-overflow-in-ib_umem_get-addr.patch
# git clone ssh://git.fedorahosted.org/git/kernel-arm64.git, git diff master...devel
Patch30000: kernel-arm64.patch
@ -1412,6 +1415,9 @@ ApplyPatch Revert-Input-synaptics-use-dmax-in-input_mt_assign_s.patch
#CVE-2015-2150 rhbz 1196266 1200397
ApplyPatch xen-pciback-limit-guest-control-of-command-register.patch
#CVE-2014-8159 rhbz 1181166 1200950
ApplyPatch IB-core-Prevent-integer-overflow-in-ib_umem_get-addr.patch
%if 0%{?aarch64patches}
ApplyPatch kernel-arm64.patch
%ifnarch aarch64 # this is stupid, but i want to notice before secondary koji does.
@ -2269,6 +2275,9 @@ fi
#
#
%changelog
* Thu Mar 12 2015 Josh Boyer <jwboyer@fedoraproject.org>
- CVE-2014-8159 infiniband: uverbs: unprotected physical memory access (rhbz 1181166 1200950)
* Wed Mar 11 2015 Josh Boyer <jwboyer@fedoraproject.org> - 4.0.0-0.rc3.git1.1
- Linux v4.0-rc3-111-gaffb8172de39
- CVE-2015-2150 xen: NMIs triggerable by guests (rhbz 1196266 1200397)