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[9.18] fix: usr: Properly calculate the amount of system memory

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On 32 bit machines isc_meminfo_totalphys could return an incorrect value.

Closes #4799

Backport of MR !9132

Merge branch 'backport-4799-cid-498034-overflowed-return-value-integer_overflow-9.18' into 'bind-9.18'

See merge request isc-projects/bind9!9200
This commit is contained in:
Mark Andrews
2024-07-31 08:50:00 +00:00
parent 541726871d 2994d6d700
commit 9faf355a5c
1 changed files with 2 additions and 2 deletions
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4
lib/isc/meminfo.c
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@@ -40,11 +40,11 @@ isc_meminfo_totalphys(void) {
long pages = sysconf(_SC_PHYS_PAGES);
long pagesize = sysconf(_SC_PAGESIZE);
if (pages == -1 || pagesize == -1) {
if (pages < 0 || pagesize < 0) {
return (0);
}
return ((size_t)pages * pagesize);
return ((uint64_t)pages * pagesize);
#endif /* if defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE) */
return (0);
}