This typo meant that calls to `mremap` which shrink a mapping by some N bytes would, when the virtual address space was pre-reserved (e.g. 32-bit guest on 64-bit host), unmap the N bytes following the *original* mapping.
Signed-off-by: Matthew Lugg <[email protected]> --- linux-user/mmap.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) No changes from last revision, just rebased. diff --git a/linux-user/mmap.c b/linux-user/mmap.c index 423c77856a..ef3833a2bb 100644 --- a/linux-user/mmap.c +++ b/linux-user/mmap.c @@ -1171,7 +1171,8 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, errno = ENOMEM; host_addr = MAP_FAILED; } else if (reserved_va && old_size > new_size) { - mmap_reserve_or_unmap(old_addr + old_size, + /* Re-reserve pages we just shrunk out of the mapping */ + mmap_reserve_or_unmap(old_addr + new_size, old_size - new_size); } } -- 2.51.2
