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Kernel: Remove SmapDisablers in stat() and lstat()

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This commit is contained in:
Andreas Kling 2020-01-06 12:13:48 +01:00
parent 08cfcb888c
commit 1226fec19e
Notes: sideshowbarker 2024-07-19 10:18:38 +09:00
1 changed files with 16 additions and 8 deletions
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24
Kernel/Process.cpp
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@ -1508,9 +1508,9 @@ int Process::sys$fstat(int fd, stat* statbuf)
return description->fstat(*statbuf);
}
int Process::sys$lstat(const char* user_path, size_t path_length, stat* statbuf)
int Process::sys$lstat(const char* user_path, size_t path_length, stat* user_statbuf)
{
if (!validate_write_typed(statbuf))
if (!validate_write_typed(user_statbuf))
return -EFAULT;
auto path = get_syscall_path_argument(user_path, path_length);
if (path.is_error())
@ -1518,13 +1518,17 @@ int Process::sys$lstat(const char* user_path, size_t path_length, stat* statbuf)
auto metadata_or_error = VFS::the().lookup_metadata(path.value(), current_directory(), O_NOFOLLOW_NOERROR);
if (metadata_or_error.is_error())
return metadata_or_error.error();
SmapDisabler disabler;
return metadata_or_error.value().stat(*statbuf);
stat statbuf;
auto result = metadata_or_error.value().stat(statbuf);
if (result.is_error())
return result;
copy_to_user(user_statbuf, &statbuf, sizeof(statbuf));
return 0;
}
int Process::sys$stat(const char* user_path, size_t path_length, stat* statbuf)
int Process::sys$stat(const char* user_path, size_t path_length, stat* user_statbuf)
{
if (!validate_write_typed(statbuf))
if (!validate_write_typed(user_statbuf))
return -EFAULT;
auto path = get_syscall_path_argument(user_path, path_length);
if (path.is_error())
@ -1532,8 +1536,12 @@ int Process::sys$stat(const char* user_path, size_t path_length, stat* statbuf)
auto metadata_or_error = VFS::the().lookup_metadata(path.value(), current_directory());
if (metadata_or_error.is_error())
return metadata_or_error.error();
SmapDisabler disabler;
return metadata_or_error.value().stat(*statbuf);
stat statbuf;
auto result = metadata_or_error.value().stat(statbuf);
if (result.is_error())
return result;
copy_to_user(user_statbuf, &statbuf, sizeof(statbuf));
return 0;
}
int Process::sys$readlink(const char* path, char* buffer, ssize_t size)