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Ensure ulStackSize is not overflow

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Natchanon Nuntanirund 2024-07-29 20:55:57 +07:00 committed by GitHub
parent fffed5e809
commit 2f1de70776
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1 changed files with 3 additions and 1 deletions
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4
portable/ThirdParty/GCC/Posix/port.c vendored
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@ -169,7 +169,9 @@ StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
pxEndOfStack = ( StackType_t * ) mach_vm_round_page( pxEndOfStack );
#endif
ulStackSize = ( size_t ) ( pxTopOfStack + 1 - pxEndOfStack ) * sizeof( *pxTopOfStack );
/* Ensure ulStackSize is not overflow */
ulStackSize = ( pxTopOfStack + 1 > pxEndOfStack ) ? ( pxTopOfStack + 1 - pxEndOfStack ) : ( pxEndOfStack - pxTopOfStack + 1);
ulStackSize = ( size_t ) ( ulStackSize ) * sizeof( *pxTopOfStack );
#ifdef __APPLE__
ulStackSize = mach_vm_trunc_page( ulStackSize );