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Read-only file system on disk.1 #14

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cutesmilee opened this issue May 26, 2021 · 0 comments
Closed

Read-only file system on disk.1 #14

cutesmilee opened this issue May 26, 2021 · 0 comments

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@cutesmilee
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cutesmilee commented May 26, 2021 •
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I think the problem is pretty simple to fix, but the command I typed (copy and pasted from the wiki) seems to be correct, but after I've mounted disk.1 (aka. /Volumes/AzulSeed18A5351d.N104N841DeveloperOS), it says that it's read-only, and I can't do anything on the disk.
I'm on a clear install of Big Sur 11.3.1, so it shouldn't be the problem.

example of the issue:
/System/Volumes/Data/SWE/macOS/BuildRoots/2288acc43c/Library/Caches/com.apple.xbs/Sources/AppleFSCompression_executables/AppleFSCompression-125/Libraries/CompressData/CompressData.c:211: chflags /Volumes/AzulSeed18A5351d.N104N841DeveloperOS/System/Library/AccessibilityBundles/SoundsAndHapticsSettings.axbundle/es_419.lproj/Accessibility.strings: Read-only file system (this happens when running sudo afscexpand /Volumes/AzulSeed18A5351d.N104N841DeveloperOS, but also trying to write something into the disk fails obv)
shannon2893 pushed a commit to shannon2893/qemu-t8030 that referenced this issue Jul 25, 2022
@philmd @huth
tests/qtest/intel-hda-test: Add reproducer for issue #542
19a5452 
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
      TrungNguyen1909#1 0x63d27260 in flatview_do_translate softmmu/physmem.c:499:15
      TrungNguyen1909#2 0x63d27af5 in flatview_translate softmmu/physmem.c:565:15
      TrungNguyen1909#3 0x63d4ce84 in flatview_write softmmu/physmem.c:2850:10
      TrungNguyen1909#4 0x63d4cb18 in address_space_write softmmu/physmem.c:2950:18
      TrungNguyen1909#5 0x63d4d387 in address_space_rw softmmu/physmem.c:2960:16
      TrungNguyen1909#6 0x62ae12f2 in dma_memory_rw_relaxed include/sysemu/dma.h:89:12
      TrungNguyen1909#7 0x62ae104a in dma_memory_rw include/sysemu/dma.h:132:12
      TrungNguyen1909#8 0x62ae6157 in dma_memory_write include/sysemu/dma.h:173:12
      TrungNguyen1909#9 0x62ae5ec0 in stl_le_dma include/sysemu/dma.h:275:1
      TrungNguyen1909#10 0x62ae5ba2 in stl_le_pci_dma include/hw/pci/pci.h:871:1
      TrungNguyen1909#11 0x62ad59a6 in intel_hda_response hw/audio/intel-hda.c:372:12
      TrungNguyen1909#12 0x62ad2afb in hda_codec_response hw/audio/intel-hda.c:107:5
      TrungNguyen1909#13 0x62aec4e1 in hda_audio_command hw/audio/hda-codec.c:655:5
      TrungNguyen1909#14 0x62ae05d9 in intel_hda_send_command hw/audio/intel-hda.c:307:5
      TrungNguyen1909#15 0x62adff54 in intel_hda_corb_run hw/audio/intel-hda.c:342:9
      TrungNguyen1909#16 0x62adc13b in intel_hda_set_corb_wp hw/audio/intel-hda.c:548:5
      TrungNguyen1909#17 0x62ae5942 in intel_hda_reg_write hw/audio/intel-hda.c:977:9
      TrungNguyen1909#18 0x62ada10a in intel_hda_mmio_write hw/audio/intel-hda.c:1054:5
      TrungNguyen1909#19 0x63d8f383 in memory_region_write_accessor softmmu/memory.c:492:5
      TrungNguyen1909#20 0x63d8ecc1 in access_with_adjusted_size softmmu/memory.c:554:18
      TrungNguyen1909#21 0x63d8d5d6 in memory_region_dispatch_write softmmu/memory.c:1504:16
      TrungNguyen1909#22 0x63d5e85e in flatview_write_continue softmmu/physmem.c:2812:23
      TrungNguyen1909#23 0x63d4d05b in flatview_write softmmu/physmem.c:2854:12
      TrungNguyen1909#24 0x63d4cb18 in address_space_write softmmu/physmem.c:2950:18
      TrungNguyen1909#25 0x63d4d387 in address_space_rw softmmu/physmem.c:2960:16
      TrungNguyen1909#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
      TrungNguyen1909#28 0x62ae6157 in dma_memory_write include/sysemu/dma.h:173:12
      TrungNguyen1909#29 0x62ae5ec0 in stl_le_dma include/sysemu/dma.h:275:1
      TrungNguyen1909#30 0x62ae5ba2 in stl_le_pci_dma include/hw/pci/pci.h:871:1
      TrungNguyen1909#31 0x62ad59a6 in intel_hda_response hw/audio/intel-hda.c:372:12
      TrungNguyen1909#32 0x62ad2afb in hda_codec_response hw/audio/intel-hda.c:107:5
      TrungNguyen1909#33 0x62aec4e1 in hda_audio_command hw/audio/hda-codec.c:655:5
      TrungNguyen1909#34 0x62ae05d9 in intel_hda_send_command hw/audio/intel-hda.c:307:5
      TrungNguyen1909#35 0x62adff54 in intel_hda_corb_run hw/audio/intel-hda.c:342:9
      TrungNguyen1909#36 0x62adc13b in intel_hda_set_corb_wp hw/audio/intel-hda.c:548:5
      TrungNguyen1909#37 0x62ae5942 in intel_hda_reg_write hw/audio/intel-hda.c:977:9
      TrungNguyen1909#38 0x62ada10a in intel_hda_mmio_write hw/audio/intel-hda.c:1054:5
      TrungNguyen1909#39 0x63d8f383 in memory_region_write_accessor softmmu/memory.c:492:5
      TrungNguyen1909#40 0x63d8ecc1 in access_with_adjusted_size softmmu/memory.c:554:18
      TrungNguyen1909#41 0x63d8d5d6 in memory_region_dispatch_write softmmu/memory.c:1504:16
      TrungNguyen1909#42 0x63d5e85e in flatview_write_continue softmmu/physmem.c:2812:23
      TrungNguyen1909#43 0x63d4d05b in flatview_write softmmu/physmem.c:2854:12
      TrungNguyen1909#44 0x63d4cb18 in address_space_write softmmu/physmem.c:2950:18
      TrungNguyen1909#45 0x63d4d387 in address_space_rw softmmu/physmem.c:2960:16
      TrungNguyen1909#46 0x62ae12f2 in dma_memory_rw_relaxed include/sysemu/dma.h:89:12
      TrungNguyen1909#47 0x62ae104a in dma_memory_rw include/sysemu/dma.h:132:12
      TrungNguyen1909#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>
shannon2893 pushed a commit to shannon2893/qemu-t8030 that referenced this issue Jul 25, 2022
@philmd @huth
hw/sd/sdhci: Prohibit DMA accesses to devices
799f7f0 
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
      TrungNguyen1909#1 0x7175f139 in sdhci_read hw/sd/sdhci.c:1022:19
      TrungNguyen1909#2 0x721b937b in memory_region_read_accessor softmmu/memory.c:440:11
      TrungNguyen1909#3 0x72171e51 in access_with_adjusted_size softmmu/memory.c:554:18
      TrungNguyen1909#4 0x7216f47c in memory_region_dispatch_read1 softmmu/memory.c:1424:16
      TrungNguyen1909#5 0x7216ebb9 in memory_region_dispatch_read softmmu/memory.c:1452:9
      TrungNguyen1909#6 0x7212db5d in flatview_read_continue softmmu/physmem.c:2879:23
      TrungNguyen1909#7 0x7212f958 in flatview_read softmmu/physmem.c:2921:12
      TrungNguyen1909#8 0x7212f418 in address_space_read_full softmmu/physmem.c:2934:18
      TrungNguyen1909#9 0x721305a9 in address_space_rw softmmu/physmem.c:2962:16
      TrungNguyen1909#10 0x7175a392 in dma_memory_rw_relaxed include/sysemu/dma.h:89:12
      TrungNguyen1909#11 0x7175a0ea in dma_memory_rw include/sysemu/dma.h:132:12
      TrungNguyen1909#12 0x71759684 in dma_memory_read include/sysemu/dma.h:152:12
      TrungNguyen1909#13 0x7175518c in sdhci_do_adma hw/sd/sdhci.c:823:27
      TrungNguyen1909#14 0x7174bf69 in sdhci_data_transfer hw/sd/sdhci.c:935:13
      TrungNguyen1909#15 0x7176aaa7 in sdhci_send_command hw/sd/sdhci.c:376:9
      TrungNguyen1909#16 0x717629ee in sdhci_write hw/sd/sdhci.c:1212:9
      TrungNguyen1909#17 0x72172513 in memory_region_write_accessor softmmu/memory.c:492:5
      TrungNguyen1909#18 0x72171e51 in access_with_adjusted_size softmmu/memory.c:554:18
      TrungNguyen1909#19 0x72170766 in memory_region_dispatch_write softmmu/memory.c:1504:16
      TrungNguyen1909#20 0x721419ee in flatview_write_continue softmmu/physmem.c:2812:23
      TrungNguyen1909#21 0x721301eb in flatview_write softmmu/physmem.c:2854:12
      TrungNguyen1909#22 0x7212fca8 in address_space_write softmmu/physmem.c:2950:18
      TrungNguyen1909#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 TrungNguyen1909#22 to TrungNguyen1909#16) start the DMA engine (frame TrungNguyen1909#13). The
engine fetch the descriptor and execute the request, which itself
accesses the SDHCI I/O registers (frame TrungNguyen1909#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>
shannon2893 pushed a commit to shannon2893/qemu-t8030 that referenced this issue Jul 25, 2022
@philmd @huth
tests/qtest/fuzz-sdcard-test: Add reproducer for OSS-Fuzz (Issue 29225)
2780116 
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
      TrungNguyen1909#1 0x564c7175f139 in sdhci_read hw/sd/sdhci.c:1022:19
      TrungNguyen1909#2 0x564c721b937b in memory_region_read_accessor softmmu/memory.c:440:11
      TrungNguyen1909#3 0x564c72171e51 in access_with_adjusted_size softmmu/memory.c:554:18
      TrungNguyen1909#4 0x564c7216f47c in memory_region_dispatch_read1 softmmu/memory.c:1424:16
      TrungNguyen1909#5 0x564c7216ebb9 in memory_region_dispatch_read softmmu/memory.c:1452:9
      TrungNguyen1909#6 0x564c7212db5d in flatview_read_continue softmmu/physmem.c:2879:23
      TrungNguyen1909#7 0x564c7212f958 in flatview_read softmmu/physmem.c:2921:12
      TrungNguyen1909#8 0x564c7212f418 in address_space_read_full softmmu/physmem.c:2934:18
      TrungNguyen1909#9 0x564c721305a9 in address_space_rw softmmu/physmem.c:2962:16
      TrungNguyen1909#10 0x564c7175a392 in dma_memory_rw_relaxed include/sysemu/dma.h:89:12
      TrungNguyen1909#11 0x564c7175a0ea in dma_memory_rw include/sysemu/dma.h:132:12
      TrungNguyen1909#12 0x564c71759684 in dma_memory_read include/sysemu/dma.h:152:12
      TrungNguyen1909#13 0x564c7175518c in sdhci_do_adma hw/sd/sdhci.c:823:27
      TrungNguyen1909#14 0x564c7174bf69 in sdhci_data_transfer hw/sd/sdhci.c:935:13
      TrungNguyen1909#15 0x564c7176aaa7 in sdhci_send_command hw/sd/sdhci.c:376:9
      TrungNguyen1909#16 0x564c717629ee in sdhci_write hw/sd/sdhci.c:1212:9
      TrungNguyen1909#17 0x564c72172513 in memory_region_write_accessor softmmu/memory.c:492:5
      TrungNguyen1909#18 0x564c72171e51 in access_with_adjusted_size softmmu/memory.c:554:18
      TrungNguyen1909#19 0x564c72170766 in memory_region_dispatch_write softmmu/memory.c:1504:16
      TrungNguyen1909#20 0x564c721419ee in flatview_write_continue softmmu/physmem.c:2812:23
      TrungNguyen1909#21 0x564c721301eb in flatview_write softmmu/physmem.c:2854:12
      TrungNguyen1909#22 0x564c7212fca8 in address_space_write softmmu/physmem.c:2950:18
      TrungNguyen1909#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)
      TrungNguyen1909#1 0x7ff05567b5e0 in g_malloc0 (/lib64/libglib-2.0.so.0+0x5a5e0)
      TrungNguyen1909#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>
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@TrungNguyen1909 @cutesmilee