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Kernel: Move process coredump metadata modification to the prctl syscall

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Liav A 2023-03-01 21:28:51 +02:00 • committed by Andreas Kling
parent 822164a686
commit be1d7c325a
8 changed files with 17 additions and 38 deletions
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1
Kernel/API/Syscall.h
View file

@ -155,7 +155,6 @@ enum class NeedsBigProcessLock {
S(scheduler_set_parameters, NeedsBigProcessLock::No) \
S(sendfd, NeedsBigProcessLock::No) \
S(sendmsg, NeedsBigProcessLock::Yes) \
S(set_coredump_metadata, NeedsBigProcessLock::No) \
S(set_mmap_name, NeedsBigProcessLock::Yes) \
S(set_process_name, NeedsBigProcessLock::No) \
S(set_thread_name, NeedsBigProcessLock::No) \

1
Kernel/API/prctl_numbers.h
View file

@ -10,3 +10,4 @@
#define PR_GET_DUMPABLE 2
#define PR_SET_NO_NEW_SYSCALL_REGION_ANNOTATIONS 3
#define PR_GET_NO_NEW_SYSCALL_REGION_ANNOTATIONS 4
#define PR_SET_COREDUMP_METADATA_VALUE 5

1
Kernel/Process.h
View file

@ -439,7 +439,6 @@ public:
ErrorOr<FlatPtr> sys$disown(ProcessID);
ErrorOr<FlatPtr> sys$allocate_tls(Userspace<char const*> initial_data, size_t);
ErrorOr<FlatPtr> sys$prctl(int option, FlatPtr arg1, FlatPtr arg2);
ErrorOr<FlatPtr> sys$set_coredump_metadata(Userspace<Syscall::SC_set_coredump_metadata_params const*>);
ErrorOr<FlatPtr> sys$anon_create(size_t, int options);
ErrorOr<FlatPtr> sys$statvfs(Userspace<Syscall::SC_statvfs_params const*> user_params);
ErrorOr<FlatPtr> sys$fstatvfs(int fd, statvfs* buf);

15
Kernel/Syscalls/prctl.cpp
View file

@ -25,7 +25,7 @@ ErrorOr<FlatPtr> Process::sys$prctl(int option, FlatPtr arg1, [[maybe_unused]] F
return address_space().with([&](auto& space) -> ErrorOr<FlatPtr> {
return space->enforces_syscall_regions();
});
case PR_SET_NO_NEW_SYSCALL_REGION_ANNOTATIONS:
case PR_SET_NO_NEW_SYSCALL_REGION_ANNOTATIONS: {
if (arg1 != 0 && arg1 != 1)
return EINVAL;
bool prohibit_new_annotated_syscall_regions = (arg1 == 1);
@ -38,6 +38,19 @@ ErrorOr<FlatPtr> Process::sys$prctl(int option, FlatPtr arg1, [[maybe_unused]] F
});
return 0;
}
case PR_SET_COREDUMP_METADATA_VALUE: {
auto params = TRY(copy_typed_from_user<Syscall::SC_set_coredump_metadata_params>(arg1));
if (params.key.length == 0 || params.key.length > 16 * KiB)
return EINVAL;
if (params.value.length > 16 * KiB)
return EINVAL;
auto key = TRY(try_copy_kstring_from_user(params.key));
auto value = TRY(try_copy_kstring_from_user(params.value));
TRY(set_coredump_property(move(key), move(value)));
return 0;
}
}
return EINVAL;
});
}

15
Kernel/Syscalls/process.cpp
View file

@ -52,19 +52,4 @@ ErrorOr<FlatPtr> Process::sys$set_process_name(Userspace<char const*> user_name,
return 0;
}
ErrorOr<FlatPtr> Process::sys$set_coredump_metadata(Userspace<Syscall::SC_set_coredump_metadata_params const*> user_params)
{
VERIFY_NO_PROCESS_BIG_LOCK(this);
auto params = TRY(copy_typed_from_user(user_params));
if (params.key.length == 0 || params.key.length > 16 * KiB)
return EINVAL;
if (params.value.length > 16 * KiB)
return EINVAL;
auto key = TRY(try_copy_kstring_from_user(params.key));
auto value = TRY(try_copy_kstring_from_user(params.value));
TRY(set_coredump_property(move(key), move(value)));
return 0;
}
}