mm/sw_tags: add config for no longer checking for tags 0#14114
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xiaoxiang781216 merged 1 commit intoapache:masterfrom Oct 12, 2024
W-M-R:swtags
Merged
mm/sw_tags: add config for no longer checking for tags 0#14114xiaoxiang781216 merged 1 commit intoapache:masterfrom W-M-R:swtags
xiaoxiang781216 merged 1 commit intoapache:masterfrom
W-M-R:swtags
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Area: Memory Management
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#define kasan_random_tag() (1 + rand() % ((1 << (64 - KASAN_TAG_SHIFT)) - 1)) ： This macro will only generate values from 1-255, not 0 or 256 |
acassis
approved these changes
Oct 11, 2024
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let's ignore macOS ci temp break. |
xiaoxiang781216
approved these changes
Oct 11, 2024
1. When dynamically loading, the read-only data of arm64 architecture is accessed through PC offset. When opening the tag kasan, because the PC value does not have a tag, accessing the read-only data will be detected with a tag mismatch error. 2. uninitial heap use 0xff poison, initial heap use 1-254 unpoison. Signed-off-by: wangmingrong1 <wangmingrong1@xiaomi.com>
xiaoxiang781216
approved these changes
Oct 12, 2024
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Summary
When dynamically loading, the read-only data of arm64 architecture is accessed through PC offset. When opening the tag kasan, because the PC value does not have a tag, accessing the read-only data will be detected with a tag mismatch error.
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Testing
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