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87997aaa1b
linux/drivers/iommu
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Ohad Ben-Cohen 87997aaa1b iommu/omap: fix NULL pointer dereference 
Fix this:

root@omap4430-panda:~# cat /debug/iommu/ducati/mem
[   62.725708] Unable to handle kernel NULL pointer dereference at virtual addre
ss 0000001c
[   62.725708] pgd = e6240000
[   62.737091] [0000001c] *pgd=a7168831, *pte=00000000, *ppte=00000000
[   62.743682] Internal error: Oops: 17 [#1] SMP
[   62.743682] Modules linked in: omap_iommu_debug omap_iovmm virtio_rpmsg_bus o
map_remoteproc remoteproc virtio_ring virtio mailbox_mach mailbox
[   62.743682] CPU: 0    Not tainted  (3.3.0-rc1-00265-g382f84e-dirty #682)
[   62.743682] PC is at debug_read_mem+0x5c/0xac [omap_iommu_debug]
[   62.743682] LR is at 0x1004
[   62.777832] pc : [<bf033178>]    lr : [<00001004>]    psr: 60000013
[   62.777832] sp : e72c7f40  ip : c0763c00  fp : 00000001
[   62.777832] r10: 00000000  r9 : 00000000  r8 : e72c7f80
[   62.777832] r7 : e6ffdc08  r6 : bed1ac78  r5 : 00001000  r4 : e7276000
[   62.777832] r3 : e60f3460  r2 : 00000000  r1 : e60f38c0  r0 : 00000000
[   62.777832] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[   62.816375] Control: 10c53c7d  Table: a624004a  DAC: 00000015
[   62.816375] Process cat (pid: 1176, stack limit = 0xe72c62f8)
[   62.828369] Stack: (0xe72c7f40 to 0xe72c8000)
...
[   62.884185] [<bf033178>] (debug_read_mem+0x5c/0xac [omap_iommu_debug]) from [<c010e354>] (vfs_read+0xac/0x130)
[   62.884185] [<c010e354>] (vfs_read+0xac/0x130) from [<c010e4a8>] (sys_read+0x40/0x70)
[   62.884185] [<c010e4a8>] (sys_read+0x40/0x70) from [<c0014a00>] (ret_fast_syscall+0x0/0x3c)

Fix also its 'echo bla > /debug/iommu/ducati/mem' Oops sibling, too.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Hiroshi Doyu <hdoyu@nvidia.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Joerg Roedel <Joerg.Roedel@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-02-24 14:10:54 +01:00
..
amd_iommu_init.c iommu/amd: Set IOTLB invalidation timeout 2011-12-22 14:56:56 +01:00
amd_iommu_proto.h iommu/amd: Add function to get IOMMUv2 domain for pdev 2011-12-12 15:19:05 +01:00
amd_iommu_types.h iommu/amd: Set IOTLB invalidation timeout 2011-12-22 14:56:56 +01:00
amd_iommu_v2.c iommu/amd: Add invalidate-context call-back 2011-12-15 11:15:39 +01:00
amd_iommu.c iommu/amd: Work around broken IVRS tables 2012-01-23 14:05:23 +01:00
dmar.c
intel-iommu.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu 2012-01-10 11:08:21 -08:00
intr_remapping.c intr_remapping: Fix section mismatch in ir_dev_scope_init() 2011-12-05 18:22:53 +01:00
intr_remapping.h
iommu.c Merge branches 'iommu/page-sizes' and 'iommu/group-id' into next 2012-01-09 13:06:28 +01:00
iova.c
Kconfig iommu/amd: Implement notifiers for IOMMUv2 2011-12-14 12:09:17 +01:00
Makefile iommu/amd: Add driver stub for AMD IOMMUv2 support 2011-12-12 15:19:07 +01:00
msm_iommu_dev.c
msm_iommu.c iommu/msm: Fix error handling in msm_iommu_unmap() 2012-01-30 12:53:14 +01:00
omap-iommu-debug.c iommu/omap: fix NULL pointer dereference 2012-02-24 14:10:54 +01:00
omap-iommu.c Merge branches 'iommu/fixes', 'arm/omap' and 'x86/amd' into next 2012-01-09 13:04:05 +01:00
omap-iovmm.c Merge branches 'iommu/fixes', 'arm/omap' and 'x86/amd' into next 2012-01-09 13:04:05 +01:00