Operation not permitted ?

[orangeC23]

Steps to reproduce

(1)The c file is :

#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/uio.h>
#include <sys/stat.h>

int main() {
    const char* file_name = "Data/hello.txt";
    int open_style= O_RDONLY;
    int fd = get_fd(file_name, open_style);
    fd_preadPGADzrDXHK(fd);
    snapshot(fd);
    return 0;
}

int fd_preadPGADzrDXHK (int fd){
    int buffer_size = 0;
    int start_value = 0;
    off_t offset_value = 17;
    return fd_pread(fd, buffer_size, start_value, offset_value);
}

int get_fd(const char* file_name, int open_style){
    int fd = open(file_name, open_style);
    if (fd == -1) {
        perror("Failed to open the file");
        return 1;
    }

    return fd;
}

int fd_pread(int fd, int buffer_size, int start_value, off_t offset_value) {
    printf("Enter fd_pread\n");
    
    char buffer1[buffer_size];

    struct iovec iov[1];
    iov[0].iov_base = buffer1;
    iov[0].iov_len = sizeof(buffer1);

    off_t new_offset = offset_value; 
    
    if (lseek(fd, new_offset, SEEK_SET) == -1) {
        perror("Error setting new offset");
        close(fd);
        return 1;
    }

    off_t current_offset = lseek(fd, 0, SEEK_CUR);
    if (current_offset == -1) {
        perror("Error getting current offset");
    }
    printf("Current offset: %lld\\n", (long long)current_offset);

    ssize_t bytes_read = preadv(fd, iov, 1, start_value);
    if (bytes_read == -1) {
        perror("Error reading the file");
        close(fd);
        return 1;
    }

    printf("Read %zd bytes:\\n", bytes_read);
    printf("Buffer 1: %.*s\\n", (int)iov[0].iov_len, (char*)iov[0].iov_base);

    printf("Leave fd_pread\n");
    return fd;
}

int snapshot(int myfd){   
    printf("Enter snapshot\n");
    
    struct stat file_info;
    if (fstat(myfd, &file_info) == -1) {
        perror("Error getting file attributes");
        close(myfd);
        return 1;
    }

    printf("File Size: %lld bytes \n", (long long)file_info.st_size);
    printf("File Permissions: %o \n", file_info.st_mode & ~S_IFMT); 
    printf("File Owner UID: %d \n", file_info.st_uid);
    printf("File Group GID: %d \n", file_info.st_gid); 
    
    off_t cur_offset = lseek(myfd, 0, SEEK_CUR);
    if (cur_offset == -1) {
        perror("Error getting current offset");
    }
    printf("Current offset: %lld \n", (long long)cur_offset);

    if (close(myfd) == -1) {
        perror("Error closing file");
        return 1;
    }

    printf("Leave snapshot\n");
}

(2) compile the c file into wasm: ./wasi-sdk-16.0/bin/clang --target=wasm32-unkown-wasi --sysroot=./wasi-sdk-16.0/share/wasi-sysroot test.c -o test.wasm
(3)exeute open.wasm
wasmer run --dir=./Data test.wasm
The permission of Data/hello.txt is 0500 or 0400, user1 create the Data/hello.txt file and user1 execute the Wasm file.

Expected behavior

wasmtime, wazero, wamr print:

Enter fd_pread
Current offset: 17\nRead 0 bytes:\nBuffer 1: \nLeave fd_pread
Enter snapshot
File Size: 30 bytes 
File Permissions: 0 
File Owner UID: 0 
File Group GID: 0 
Current offset: 17 
Leave snapshot

And ubuntu(compile the cfile directly into native code through gcc) prints:

Enter fd_pread
Current offset: 17\nRead 0 bytes:\nBuffer 1: \nLeave fd_pread
Enter snapshot
File Size: 30 bytes 
File Permissions: 500 
File Owner UID: 1002 
File Group GID: 1002 
Current offset: 17 
Leave snapshot

Actual behavior

wasmer prints:

Failed to open the file: Operation not permitted
Enter fd_pread
Error setting new offset: Permission denied
Error getting file attributes: Bad file descriptor

version

wasmer 4.2.2

ubuntu 20.04

[Arshia001]

Probably related to #4257, #4259 and #4270.