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Kernel: Properly lock Process protected data in the prctl syscall

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Liav A 2022-12-25 12:11:27 +02:00 • committed by Linus Groh
parent 727218ff4a
commit bedd90b1f0
3 changed files with 12 additions and 16 deletions
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20
Kernel/Syscalls/prctl.cpp
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@ -12,14 +12,18 @@ namespace Kernel {
ErrorOr<FlatPtr> Process::sys$prctl(int option, FlatPtr arg1, [[maybe_unused]] FlatPtr arg2)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
switch (option) {
case PR_GET_DUMPABLE:
return is_dumpable();
case PR_SET_DUMPABLE:
set_dumpable(arg1);
return 0;
}
return EINVAL;
return with_mutable_protected_data([&](auto& protected_data) -> ErrorOr<FlatPtr> {
switch (option) {
case PR_GET_DUMPABLE:
return protected_data.dumpable;
case PR_SET_DUMPABLE:
if (arg1 != 0 && arg1 != 1)
return EINVAL;
protected_data.dumpable = arg1;
return 0;
}
return EINVAL;
});
}
}