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kernel/fs: Add some missing descriptor open_mode checks.

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This commit is contained in:
Augustin Cavalier
2025-09-04 12:48:04 -04:00
parent 5b41bc0066
commit 01f5b3146f
2 changed files with 11 additions and 2 deletions
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src/system/kernel/fs/vfs.cpp
+4
View File
@@ -4117,6 +4117,8 @@ read_file_io_vec_pages(int fd, const file_io_vec* fileVecs, size_t fileVecCount,
FileDescriptorPutter descriptor(get_fd_and_vnode(fd, &vnode, true));
if (!descriptor.IsSet())
return B_FILE_ERROR;
if ((descriptor->open_mode & O_RWMASK) == O_WRONLY)
return B_FILE_ERROR;
status_t status = common_file_io_vec_pages(vnode, descriptor->cookie,
fileVecs, fileVecCount, vecs, vecCount, _vecIndex, _vecOffset, _bytes,
@@ -4135,6 +4137,8 @@ write_file_io_vec_pages(int fd, const file_io_vec* fileVecs, size_t fileVecCount
FileDescriptorPutter descriptor(get_fd_and_vnode(fd, &vnode, true));
if (!descriptor.IsSet())
return B_FILE_ERROR;
if ((descriptor->open_mode & O_RWMASK) == O_RDONLY)
return B_FILE_ERROR;
status_t status = common_file_io_vec_pages(vnode, descriptor->cookie,
fileVecs, fileVecCount, vecs, vecCount, _vecIndex, _vecOffset, _bytes,
src/system/kernel/fs/vfs_request_io.cpp
+7 -2
View File
@@ -504,6 +504,13 @@ do_iterative_fd_io(int fd, io_request* request, iterative_io_get_vecs getVecs,
struct vnode* vnode;
file_descriptor* descriptor = get_fd_and_vnode(fd, &vnode, true);
FileDescriptorPutter descriptorPutter(descriptor);
if (descriptor != NULL && (request->IsWrite()
? (descriptor->open_mode & O_RWMASK) == O_RDONLY
: (descriptor->open_mode & O_RWMASK) == O_WRONLY)) {
descriptor = NULL;
}
if (descriptor == NULL) {
if (finished != NULL)
finished(cookie, request, B_FILE_ERROR, true, 0);
@@ -511,8 +518,6 @@ do_iterative_fd_io(int fd, io_request* request, iterative_io_get_vecs getVecs,
return B_FILE_ERROR;
}
FileDescriptorPutter descriptorPutter(descriptor);
if (!HAS_FS_CALL(vnode, io)) {
// no io() call -- fall back to synchronous I/O
return do_synchronous_iterative_vnode_io(vnode, descriptor->cookie,