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Detect Mach_header.sizeofcmds==0

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https://github.com/upx/upx/issues/448
	modified:   p_mach.cpp
This commit is contained in:
John Reiser 2021-01-17 17:09:35 -08:00 committed by Markus F.X.J. Oberhumer
parent c9fe84c9aa
commit 80de11bc5b
1 changed files with 3 additions and 2 deletions
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5
src/p_mach.cpp
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@ -1811,8 +1811,9 @@ bool PackMachBase<T>::canPack()
char buf[32]; snprintf(buf, sizeof(buf), "bad sizeofcmds %d", sz_mhcmds); char buf[32]; snprintf(buf, sizeof(buf), "bad sizeofcmds %d", sz_mhcmds);
throwCantPack(buf); throwCantPack(buf);
} }
if (16384 < sz_mhcmds) { // somewhat arbitrary, but amd64-darwin.macho-upxmain.c if (!sz_mhcmds
throwCantPack("16384 < Mach_header.sizeofcmds"); || 16384 < sz_mhcmds) { // somewhat arbitrary, but amd64-darwin.macho-upxmain.c
throwCantPack("16384 < Mach_header.sizeofcmds (or ==0)");
} }
rawmseg_buf.alloc(sz_mhcmds); rawmseg_buf.alloc(sz_mhcmds);
rawmseg = (Mach_segment_command *)(void *)rawmseg_buf; rawmseg = (Mach_segment_command *)(void *)rawmseg_buf;