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Fix null pointer crashes causing seed node crash-loops (v5.8.1)

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Guard pindexBest and pprev dereferences that segfault during IBD
block serving when chain state is incomplete:
- kernel.cpp: CheckStakeKernelHash null pindexBest during PoS validation
- main.cpp: InvalidChainFound null pprev/pindexBest on rejected blocks
- main.cpp: SetBestChain null pprev in trust calculation
- main.cpp: ProcessBlock orphan handler null pindexBest

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Sami Ahmed
2026-04-17 00:55:48 -07:00
parent a0e8e74d0d
commit cd7b68f7cb
4 changed files with 18 additions and 12 deletions
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src/clientversion.h
+1 -1
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@@ -8,7 +8,7 @@
// These need to be macros, as version.cpp's and triangles-qt.rc's voodoo requires it
#define CLIENT_VERSION_MAJOR 5
#define CLIENT_VERSION_MINOR 8
#define CLIENT_VERSION_REVISION 0
#define CLIENT_VERSION_REVISION 1
#define CLIENT_VERSION_BUILD 0
// Converts the parameter X to a string after macro replacement on X has been performed.