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8329961: Buffer overflow in os::Linux::kernel_version

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Reviewed-by: rehn, stuefe
This commit is contained in:
Johan Sjölen 2024-04-10 15:16:25 +00:00
parent 9731b1c8b0
commit 279ed0ddd5
1 changed files with 3 additions and 10 deletions
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13
src/hotspot/os/linux/os_linux.cpp
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@ -377,16 +377,9 @@ void os::Linux::kernel_version(long* major, long* minor) {
log_warning(os)("uname(2) failed to get kernel version: %s", os::errno_name(ret));
return;
}
char* walker = buffer.release;
long* set_v = major;
while (*minor == -1 && walker != nullptr) {
if (isdigit(walker[0])) {
*set_v = strtol(walker, &walker, 10);
set_v = minor;
} else {
++walker;
}
int nr_matched = sscanf(buffer.release, "%ld.%ld", major, minor);
if (nr_matched != 2) {
log_warning(os)("Parsing kernel version failed, expected 2 version numbers, only matched %d", nr_matched);
}
}