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8315739: Missing null check in os::vm_min_address

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Reviewed-by: dholmes, jvernee
This commit is contained in:
Daniel Jeliński 2023-09-21 12:43:53 +00:00
parent 8cbe42b94a
commit 349723cb8d
1 changed files with 6 additions and 3 deletions
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9
src/hotspot/os/linux/os_linux.cpp
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@ -4254,9 +4254,12 @@ size_t os::vm_min_address() {
static size_t value = 0;
if (value == 0) {
assert(is_aligned(_vm_min_address_default, os::vm_allocation_granularity()), "Sanity");
FILE* f = fopen("/proc/sys/vm/mmap_min_addr", "r");
if (fscanf(f, "%zu", &value) != 1) {
value = _vm_min_address_default;
FILE* f = os::fopen("/proc/sys/vm/mmap_min_addr", "r");
if (f != nullptr) {
if (fscanf(f, "%zu", &value) != 1) {
value = _vm_min_address_default;
}
fclose(f);
}
value = MAX2(_vm_min_address_default, value);
}