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| author | Bjorn Helgaas <bjorn.helgaas@hp.com> | 2006-02-17 13:59:50 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-17 14:09:22 -0800 |
| commit | 35b73ceb9a7d10c81bd9e79e8485f7079ef2b40e (patch) | |
| tree | c09177d88d8cbef4c753744c72053a0bd8f35fef /drivers/acpi | |
| parent | 636f13c174dd7c84a437d3c3e8fa66f03f7fda63 (diff) | |
| download | kernel_samsung_espresso10-35b73ceb9a7d10c81bd9e79e8485f7079ef2b40e.zip kernel_samsung_espresso10-35b73ceb9a7d10c81bd9e79e8485f7079ef2b40e.tar.gz kernel_samsung_espresso10-35b73ceb9a7d10c81bd9e79e8485f7079ef2b40e.tar.bz2 | |
[PATCH] ACPI: fix vendor resource length computation
acpi_rs_get_list_length() needs to account for all the vendor-defined data
bytes. Failing to include these causes buffers to be sized too small,
which causes slab corruption when we later convert AML to resources and run
off the end of the buffer.
This causes slab corruption on machines that use ACPI vendor-defined
resources. All HP ia64 machines do, and I'm told that some NEC machines
may as well.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: "Brown, Len" <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/resources/rscalc.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/acpi/resources/rscalc.c b/drivers/acpi/resources/rscalc.c index 7d6481d..4038dbf 100644 --- a/drivers/acpi/resources/rscalc.c +++ b/drivers/acpi/resources/rscalc.c @@ -391,8 +391,7 @@ acpi_rs_get_list_length(u8 * aml_buffer, * Ensure a 32-bit boundary for the structure */ extra_struct_bytes = - ACPI_ROUND_UP_to_32_bITS(resource_length) - - resource_length; + ACPI_ROUND_UP_to_32_bITS(resource_length); break; case ACPI_RESOURCE_NAME_END_TAG: @@ -408,8 +407,7 @@ acpi_rs_get_list_length(u8 * aml_buffer, * Add vendor data and ensure a 32-bit boundary for the structure */ extra_struct_bytes = - ACPI_ROUND_UP_to_32_bITS(resource_length) - - resource_length; + ACPI_ROUND_UP_to_32_bITS(resource_length); break; case ACPI_RESOURCE_NAME_ADDRESS32: |