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| author | Richard Henderson <richard.henderson@linaro.org> | 2023-03-06 01:26:29 +0300 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-03-28 15:23:10 -0700 |
| commit | 95059f9c313a7fbd7f22e4cdc1977c0393addc7b (patch) | |
| tree | 5cbda761db3d946f2dafca04afaab139077596dd /bsd-user/mmap.c | |
| parent | a3a67f54f0b4ec98ff2380a792e5bfeebc47d554 (diff) | |
| download | focaccia-qemu-95059f9c313a7fbd7f22e4cdc1977c0393addc7b.tar.gz focaccia-qemu-95059f9c313a7fbd7f22e4cdc1977c0393addc7b.zip | |
include/exec: Change reserved_va semantics to last byte
Change the semantics to be the last byte of the guest va, rather than the following byte. This avoids some overflow conditions. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'bsd-user/mmap.c')
| -rw-r--r-- | bsd-user/mmap.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/bsd-user/mmap.c b/bsd-user/mmap.c index 696057551a..565b9f97ed 100644 --- a/bsd-user/mmap.c +++ b/bsd-user/mmap.c @@ -234,7 +234,7 @@ static abi_ulong mmap_find_vma_reserved(abi_ulong start, abi_ulong size, size = HOST_PAGE_ALIGN(size) + alignment; end_addr = start + size; if (end_addr > reserved_va) { - end_addr = reserved_va; + end_addr = reserved_va + 1; } addr = end_addr - qemu_host_page_size; @@ -243,7 +243,7 @@ static abi_ulong mmap_find_vma_reserved(abi_ulong start, abi_ulong size, if (looped) { return (abi_ulong)-1; } - end_addr = reserved_va; + end_addr = reserved_va + 1; addr = end_addr - qemu_host_page_size; looped = 1; continue; |