[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-commits] [qemu/qemu] 58e746: softmmu/physmem: Simplify flatview_wr
|
From: |
Peter Maydell |
|
Subject: |
[Qemu-commits] [qemu/qemu] 58e746: softmmu/physmem: Simplify flatview_write and addre... |
|
Date: |
Tue, 22 Mar 2022 15:58:24 -0700 |
Branch: refs/heads/master
Home: https://github.com/qemu/qemu
Commit: 58e74682baf4e1ad26b064d8c02e5bc99c75c5d9
https://github.com/qemu/qemu/commit/58e74682baf4e1ad26b064d8c02e5bc99c75c5d9
Author: Philippe Mathieu-Daudé <philmd@redhat.com>
Date: 2022-03-21 (Mon, 21 Mar 2022)
Changed paths:
M softmmu/physmem.c
Log Message:
-----------
softmmu/physmem: Simplify flatview_write and address_space_access_valid
Remove unuseful local 'result' variables.
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211215182421.418374-3-philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Commit: 3ab6fdc91b72e156da22848f0003ff4225690ced
https://github.com/qemu/qemu/commit/3ab6fdc91b72e156da22848f0003ff4225690ced
Author: Philippe Mathieu-Daudé <philmd@redhat.com>
Date: 2022-03-21 (Mon, 21 Mar 2022)
Changed paths:
M include/exec/memattrs.h
M softmmu/physmem.c
Log Message:
-----------
softmmu/physmem: Introduce MemTxAttrs::memory field and MEMTX_ACCESS_ERROR
Add the 'memory' bit to the memory attributes to restrict bus
controller accesses to memories.
Introduce flatview_access_allowed() to check bus permission
before running any bus transaction.
Have read/write accessors return MEMTX_ACCESS_ERROR if an access is
restricted.
There is no change for the default case where 'memory' is not set.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211215182421.418374-4-philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
[thuth: Replaced MEMTX_BUS_ERROR with MEMTX_ACCESS_ERROR, remove "inline"]
Signed-off-by: Thomas Huth <thuth@redhat.com>
Commit: be5a8cf347d0c47ee3e933dde075526fd8bd5c40
https://github.com/qemu/qemu/commit/be5a8cf347d0c47ee3e933dde075526fd8bd5c40
Author: Philippe Mathieu-Daudé <philmd@redhat.com>
Date: 2022-03-21 (Mon, 21 Mar 2022)
Changed paths:
M hw/audio/intel-hda.c
Log Message:
-----------
hw/audio/intel-hda: Do not ignore DMA overrun errors
Per the "High Definition Audio Specification" manual (rev. 1.0a),
section "3.3.30 Offset 5Dh: RIRBSTS - RIRB Status":
Response Overrun Interrupt Status (RIRBOIS):
Hardware sets this bit to a 1 when an overrun occurs in the RIRB.
An interrupt may be generated if the Response Overrun Interrupt
Control bit is set.
This bit will be set if the RIRB DMA engine is not able to write
the incoming responses to memory before additional incoming
responses overrun the internal FIFO.
When hardware detects an overrun, it will drop the responses which
overrun the buffer and set the RIRBOIS status bit to indicate the
error condition. Optionally, if the RIRBOIC is set, the hardware
will also generate an error to alert software to the problem.
QEMU emulates the DMA engine with the stl_le_pci_dma() calls. This
function returns a MemTxResult indicating whether the DMA access
was successful.
Handle any MemTxResult error as "DMA engine is not able to write the
incoming responses to memory" and raise the Overrun Interrupt flag
when this case occurs.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211218160912.1591633-2-philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Commit: 79fa99831debc9782087e834382c577215f2f511
https://github.com/qemu/qemu/commit/79fa99831debc9782087e834382c577215f2f511
Author: Philippe Mathieu-Daudé <philmd@redhat.com>
Date: 2022-03-21 (Mon, 21 Mar 2022)
Changed paths:
M hw/audio/intel-hda.c
Log Message:
-----------
hw/audio/intel-hda: Restrict DMA engine to memories (not MMIO devices)
Issue #542 reports a reentrancy problem when the DMA engine accesses
the HDA controller I/O registers. Fix by restricting the DMA engine
to memories regions (forbidding MMIO devices such the HDA controller).
Reported-by: OSS-Fuzz (Issue 28435)
Reported-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/542
CVE: CVE-2021-3611
Message-Id: <20211218160912.1591633-3-philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Commit: 19a5452723b51af74489d6cfa481b9d45d0b565a
https://github.com/qemu/qemu/commit/19a5452723b51af74489d6cfa481b9d45d0b565a
Author: Philippe Mathieu-Daudé <philmd@redhat.com>
Date: 2022-03-21 (Mon, 21 Mar 2022)
Changed paths:
M tests/qtest/intel-hda-test.c
Log Message:
-----------
tests/qtest/intel-hda-test: Add reproducer for issue #542
Include the qtest reproducer provided by Alexander Bulekov
in https://gitlab.com/qemu-project/qemu/-/issues/542.
Without the previous commit, we get:
$ make check-qtest-i386
...
Running test tests/qtest/intel-hda-test
AddressSanitizer:DEADLYSIGNAL
=================================================================
==1580408==ERROR: AddressSanitizer: stack-overflow on address 0x7ffc3d566fe0
#0 0x63d297cf in address_space_translate_internal softmmu/physmem.c:356
#1 0x63d27260 in flatview_do_translate softmmu/physmem.c:499:15
#2 0x63d27af5 in flatview_translate softmmu/physmem.c:565:15
#3 0x63d4ce84 in flatview_write softmmu/physmem.c:2850:10
#4 0x63d4cb18 in address_space_write softmmu/physmem.c:2950:18
#5 0x63d4d387 in address_space_rw softmmu/physmem.c:2960:16
#6 0x62ae12f2 in dma_memory_rw_relaxed include/sysemu/dma.h:89:12
#7 0x62ae104a in dma_memory_rw include/sysemu/dma.h:132:12
#8 0x62ae6157 in dma_memory_write include/sysemu/dma.h:173:12
#9 0x62ae5ec0 in stl_le_dma include/sysemu/dma.h:275:1
#10 0x62ae5ba2 in stl_le_pci_dma include/hw/pci/pci.h:871:1
#11 0x62ad59a6 in intel_hda_response hw/audio/intel-hda.c:372:12
#12 0x62ad2afb in hda_codec_response hw/audio/intel-hda.c:107:5
#13 0x62aec4e1 in hda_audio_command hw/audio/hda-codec.c:655:5
#14 0x62ae05d9 in intel_hda_send_command hw/audio/intel-hda.c:307:5
#15 0x62adff54 in intel_hda_corb_run hw/audio/intel-hda.c:342:9
#16 0x62adc13b in intel_hda_set_corb_wp hw/audio/intel-hda.c:548:5
#17 0x62ae5942 in intel_hda_reg_write hw/audio/intel-hda.c:977:9
#18 0x62ada10a in intel_hda_mmio_write hw/audio/intel-hda.c:1054:5
#19 0x63d8f383 in memory_region_write_accessor softmmu/memory.c:492:5
#20 0x63d8ecc1 in access_with_adjusted_size softmmu/memory.c:554:18
#21 0x63d8d5d6 in memory_region_dispatch_write softmmu/memory.c:1504:16
#22 0x63d5e85e in flatview_write_continue softmmu/physmem.c:2812:23
#23 0x63d4d05b in flatview_write softmmu/physmem.c:2854:12
#24 0x63d4cb18 in address_space_write softmmu/physmem.c:2950:18
#25 0x63d4d387 in address_space_rw softmmu/physmem.c:2960:16
#26 0x62ae12f2 in dma_memory_rw_relaxed include/sysemu/dma.h:89:12
#27 0x62ae104a in dma_memory_rw include/sysemu/dma.h:132:12
#28 0x62ae6157 in dma_memory_write include/sysemu/dma.h:173:12
#29 0x62ae5ec0 in stl_le_dma include/sysemu/dma.h:275:1
#30 0x62ae5ba2 in stl_le_pci_dma include/hw/pci/pci.h:871:1
#31 0x62ad59a6 in intel_hda_response hw/audio/intel-hda.c:372:12
#32 0x62ad2afb in hda_codec_response hw/audio/intel-hda.c:107:5
#33 0x62aec4e1 in hda_audio_command hw/audio/hda-codec.c:655:5
#34 0x62ae05d9 in intel_hda_send_command hw/audio/intel-hda.c:307:5
#35 0x62adff54 in intel_hda_corb_run hw/audio/intel-hda.c:342:9
#36 0x62adc13b in intel_hda_set_corb_wp hw/audio/intel-hda.c:548:5
#37 0x62ae5942 in intel_hda_reg_write hw/audio/intel-hda.c:977:9
#38 0x62ada10a in intel_hda_mmio_write hw/audio/intel-hda.c:1054:5
#39 0x63d8f383 in memory_region_write_accessor softmmu/memory.c:492:5
#40 0x63d8ecc1 in access_with_adjusted_size softmmu/memory.c:554:18
#41 0x63d8d5d6 in memory_region_dispatch_write softmmu/memory.c:1504:16
#42 0x63d5e85e in flatview_write_continue softmmu/physmem.c:2812:23
#43 0x63d4d05b in flatview_write softmmu/physmem.c:2854:12
#44 0x63d4cb18 in address_space_write softmmu/physmem.c:2950:18
#45 0x63d4d387 in address_space_rw softmmu/physmem.c:2960:16
#46 0x62ae12f2 in dma_memory_rw_relaxed include/sysemu/dma.h:89:12
#47 0x62ae104a in dma_memory_rw include/sysemu/dma.h:132:12
#48 0x62ae6157 in dma_memory_write include/sysemu/dma.h:173:12
...
SUMMARY: AddressSanitizer: stack-overflow softmmu/physmem.c:356 in
address_space_translate_internal
==1580408==ABORTING
Broken pipe
Aborted (core dumped)
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20211218160912.1591633-4-philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Commit: 78e619cbd5d5a30f0a849c183391b8f87f8099e6
https://github.com/qemu/qemu/commit/78e619cbd5d5a30f0a849c183391b8f87f8099e6
Author: Philippe Mathieu-Daudé <f4bug@amsat.org>
Date: 2022-03-21 (Mon, 21 Mar 2022)
Changed paths:
M hw/sd/sdhci.c
Log Message:
-----------
hw/sd/sdhci: Honor failed DMA transactions
DMA transactions might fail. The DMA API returns a MemTxResult,
indicating such failures. Do not ignore it. On failure, raise
the ADMA error flag and eventually triggering an IRQ (see spec
chapter 1.13.5: "ADMA2 States").
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20211215205656.488940-2-philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Commit: 799f7f0104a3f2e0fea06ee7b31a1c293cd7c948
https://github.com/qemu/qemu/commit/799f7f0104a3f2e0fea06ee7b31a1c293cd7c948
Author: Philippe Mathieu-Daudé <f4bug@amsat.org>
Date: 2022-03-21 (Mon, 21 Mar 2022)
Changed paths:
M hw/sd/sdhci.c
Log Message:
-----------
hw/sd/sdhci: Prohibit DMA accesses to devices
The issue reported by OSS-Fuzz produces the following backtrace:
==447470==ERROR: AddressSanitizer: heap-buffer-overflow
READ of size 1 at 0x61500002a080 thread T0
#0 0x71766d47 in sdhci_read_dataport hw/sd/sdhci.c:474:18
#1 0x7175f139 in sdhci_read hw/sd/sdhci.c:1022:19
#2 0x721b937b in memory_region_read_accessor softmmu/memory.c:440:11
#3 0x72171e51 in access_with_adjusted_size softmmu/memory.c:554:18
#4 0x7216f47c in memory_region_dispatch_read1 softmmu/memory.c:1424:16
#5 0x7216ebb9 in memory_region_dispatch_read softmmu/memory.c:1452:9
#6 0x7212db5d in flatview_read_continue softmmu/physmem.c:2879:23
#7 0x7212f958 in flatview_read softmmu/physmem.c:2921:12
#8 0x7212f418 in address_space_read_full softmmu/physmem.c:2934:18
#9 0x721305a9 in address_space_rw softmmu/physmem.c:2962:16
#10 0x7175a392 in dma_memory_rw_relaxed include/sysemu/dma.h:89:12
#11 0x7175a0ea in dma_memory_rw include/sysemu/dma.h:132:12
#12 0x71759684 in dma_memory_read include/sysemu/dma.h:152:12
#13 0x7175518c in sdhci_do_adma hw/sd/sdhci.c:823:27
#14 0x7174bf69 in sdhci_data_transfer hw/sd/sdhci.c:935:13
#15 0x7176aaa7 in sdhci_send_command hw/sd/sdhci.c:376:9
#16 0x717629ee in sdhci_write hw/sd/sdhci.c:1212:9
#17 0x72172513 in memory_region_write_accessor softmmu/memory.c:492:5
#18 0x72171e51 in access_with_adjusted_size softmmu/memory.c:554:18
#19 0x72170766 in memory_region_dispatch_write softmmu/memory.c:1504:16
#20 0x721419ee in flatview_write_continue softmmu/physmem.c:2812:23
#21 0x721301eb in flatview_write softmmu/physmem.c:2854:12
#22 0x7212fca8 in address_space_write softmmu/physmem.c:2950:18
#23 0x721d9a53 in qtest_process_command softmmu/qtest.c:727:9
A DMA descriptor is previously filled in RAM. An I/O access to the
device (frames #22 to #16) start the DMA engine (frame #13). The
engine fetch the descriptor and execute the request, which itself
accesses the SDHCI I/O registers (frame #1 and #0), triggering a
re-entrancy issue.
Fix by prohibit transactions from the DMA to devices. The DMA engine
is thus restricted to memories.
Reported-by: OSS-Fuzz (Issue 36391)
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/451
Message-Id: <20211215205656.488940-3-philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Commit: 27801168ecbb34b987d2e92a12369367bf9ac2bf
https://github.com/qemu/qemu/commit/27801168ecbb34b987d2e92a12369367bf9ac2bf
Author: Philippe Mathieu-Daudé <philmd@redhat.com>
Date: 2022-03-21 (Mon, 21 Mar 2022)
Changed paths:
M tests/qtest/fuzz-sdcard-test.c
Log Message:
-----------
tests/qtest/fuzz-sdcard-test: Add reproducer for OSS-Fuzz (Issue 29225)
Include the qtest reproducer provided by Alexander Bulekov
in https://gitlab.com/qemu-project/qemu/-/issues/451. Without
the previous commit, we get:
$ make check-qtest-i386
...
Running test qtest-i386/fuzz-sdcard-test
==447470==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x61500002a080 at pc 0x564c71766d48 bp 0x7ffc126c62b0 sp 0x7ffc126c62a8
READ of size 1 at 0x61500002a080 thread T0
#0 0x564c71766d47 in sdhci_read_dataport hw/sd/sdhci.c:474:18
#1 0x564c7175f139 in sdhci_read hw/sd/sdhci.c:1022:19
#2 0x564c721b937b in memory_region_read_accessor softmmu/memory.c:440:11
#3 0x564c72171e51 in access_with_adjusted_size softmmu/memory.c:554:18
#4 0x564c7216f47c in memory_region_dispatch_read1 softmmu/memory.c:1424:16
#5 0x564c7216ebb9 in memory_region_dispatch_read softmmu/memory.c:1452:9
#6 0x564c7212db5d in flatview_read_continue softmmu/physmem.c:2879:23
#7 0x564c7212f958 in flatview_read softmmu/physmem.c:2921:12
#8 0x564c7212f418 in address_space_read_full softmmu/physmem.c:2934:18
#9 0x564c721305a9 in address_space_rw softmmu/physmem.c:2962:16
#10 0x564c7175a392 in dma_memory_rw_relaxed include/sysemu/dma.h:89:12
#11 0x564c7175a0ea in dma_memory_rw include/sysemu/dma.h:132:12
#12 0x564c71759684 in dma_memory_read include/sysemu/dma.h:152:12
#13 0x564c7175518c in sdhci_do_adma hw/sd/sdhci.c:823:27
#14 0x564c7174bf69 in sdhci_data_transfer hw/sd/sdhci.c:935:13
#15 0x564c7176aaa7 in sdhci_send_command hw/sd/sdhci.c:376:9
#16 0x564c717629ee in sdhci_write hw/sd/sdhci.c:1212:9
#17 0x564c72172513 in memory_region_write_accessor softmmu/memory.c:492:5
#18 0x564c72171e51 in access_with_adjusted_size softmmu/memory.c:554:18
#19 0x564c72170766 in memory_region_dispatch_write
softmmu/memory.c:1504:16
#20 0x564c721419ee in flatview_write_continue softmmu/physmem.c:2812:23
#21 0x564c721301eb in flatview_write softmmu/physmem.c:2854:12
#22 0x564c7212fca8 in address_space_write softmmu/physmem.c:2950:18
#23 0x564c721d9a53 in qtest_process_command softmmu/qtest.c:727:9
0x61500002a080 is located 0 bytes to the right of 512-byte region
[0x615000029e80,0x61500002a080)
allocated by thread T0 here:
#0 0x564c708e1737 in __interceptor_calloc (qemu-system-i386+0x1e6a737)
#1 0x7ff05567b5e0 in g_malloc0 (/lib64/libglib-2.0.so.0+0x5a5e0)
#2 0x564c71774adb in sdhci_pci_realize hw/sd/sdhci-pci.c:36:5
SUMMARY: AddressSanitizer: heap-buffer-overflow hw/sd/sdhci.c:474:18 in
sdhci_read_dataport
Shadow bytes around the buggy address:
0x0c2a7fffd3c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c2a7fffd3d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c2a7fffd3e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c2a7fffd3f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c2a7fffd400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c2a7fffd410:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c2a7fffd420: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c2a7fffd430: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c2a7fffd440: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c2a7fffd450: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c2a7fffd460: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Heap left redzone: fa
Freed heap region: fd
==447470==ABORTING
Broken pipe
ERROR qtest-i386/fuzz-sdcard-test - too few tests run (expected 3, got 2)
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20211215205656.488940-4-philmd@redhat.com>
[thuth: Replaced "-m 4G" with "-m 512M"]
Signed-off-by: Thomas Huth <thuth@redhat.com>
Commit: b7a3a705b644495b7b578e94e0e9dedf93c4f661
https://github.com/qemu/qemu/commit/b7a3a705b644495b7b578e94e0e9dedf93c4f661
Author: Peter Maydell <peter.maydell@linaro.org>
Date: 2022-03-22 (Tue, 22 Mar 2022)
Changed paths:
M hw/audio/intel-hda.c
M hw/sd/sdhci.c
M include/exec/memattrs.h
M softmmu/physmem.c
M tests/qtest/fuzz-sdcard-test.c
M tests/qtest/intel-hda-test.c
Log Message:
-----------
Merge tag 'pull-request-2022-03-21' of https://gitlab.com/thuth/qemu into
staging
* Fix stack-overflow due to recursive DMA in intel-hda (CVE-2021-3611)
* Fix heap overflow due to recursive DMA in sdhci code
# gpg: Signature made Mon 21 Mar 2022 16:14:36 GMT
# gpg: using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg: issuer "thuth@redhat.com"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg: aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg: aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg: aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3 EAB9 2ED9 D774 FE70 2DB5
* tag 'pull-request-2022-03-21' of https://gitlab.com/thuth/qemu:
tests/qtest/fuzz-sdcard-test: Add reproducer for OSS-Fuzz (Issue 29225)
hw/sd/sdhci: Prohibit DMA accesses to devices
hw/sd/sdhci: Honor failed DMA transactions
tests/qtest/intel-hda-test: Add reproducer for issue #542
hw/audio/intel-hda: Restrict DMA engine to memories (not MMIO devices)
hw/audio/intel-hda: Do not ignore DMA overrun errors
softmmu/physmem: Introduce MemTxAttrs::memory field and MEMTX_ACCESS_ERROR
softmmu/physmem: Simplify flatview_write and address_space_access_valid
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Compare: https://github.com/qemu/qemu/compare/04ddcda6a238...b7a3a705b644