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Kernel+LibC+LibCore: Pass fcntl extra argument as pointer-sized variable

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The extra argument to fcntl is a pointer in the case of F_GETLK/F_SETLK
and we were pulling out a u32, leading to pointer truncation on x86_64.
Among other things, this fixes Assistant on x86_64 :^)
This commit is contained in:
gggggg-gggggg 2022-07-03 01:02:45 +02:00 • committed by Andreas Kling
parent 656528f483
commit d728017578
4 changed files with 4 additions and 4 deletions
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2
Kernel/Process.h
View file

@ -349,7 +349,7 @@ public:
ErrorOr<FlatPtr> sys$setresgid(GroupID, GroupID, GroupID);
ErrorOr<FlatPtr> sys$alarm(unsigned seconds);
ErrorOr<FlatPtr> sys$access(Userspace<char const*> pathname, size_t path_length, int mode);
ErrorOr<FlatPtr> sys$fcntl(int fd, int cmd, u32 extra_arg);
ErrorOr<FlatPtr> sys$fcntl(int fd, int cmd, uintptr_t extra_arg);
ErrorOr<FlatPtr> sys$ioctl(int fd, unsigned request, FlatPtr arg);
ErrorOr<FlatPtr> sys$mkdir(Userspace<char const*> pathname, size_t path_length, mode_t mode);
ErrorOr<FlatPtr> sys$times(Userspace<tms*>);

2
Kernel/Syscalls/fcntl.cpp
View file

@ -10,7 +10,7 @@
namespace Kernel {
ErrorOr<FlatPtr> Process::sys$fcntl(int fd, int cmd, u32 arg)
ErrorOr<FlatPtr> Process::sys$fcntl(int fd, int cmd, uintptr_t arg)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
TRY(require_promise(Pledge::stdio));

2
Userland/Libraries/LibC/fcntl.cpp
View file

@ -19,7 +19,7 @@ int fcntl(int fd, int cmd, ...)
{
va_list ap;
va_start(ap, cmd);
u32 extra_arg = va_arg(ap, u32);
uintptr_t extra_arg = va_arg(ap, uintptr_t);
int rc = syscall(SC_fcntl, fd, cmd, extra_arg);
va_end(ap);
__RETURN_WITH_ERRNO(rc, rc, -1);

2
Userland/Libraries/LibCore/System.cpp
View file

@ -248,7 +248,7 @@ ErrorOr<int> fcntl(int fd, int command, ...)
{
va_list ap;
va_start(ap, command);
u32 extra_arg = va_arg(ap, u32);
uintptr_t extra_arg = va_arg(ap, uintptr_t);
int rc = ::fcntl(fd, command, extra_arg);
va_end(ap);
if (rc < 0)