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Revert "net/socket: convert sock_map_fd() to FD_ADD()" 

This reverts commit 245f0d1c62.

When allocating a file sock_alloc_file() consumes the socket reference
unconditionally which isn't correctly handled in the conversion. This
can be fixed by massaging this appropriately but this is best left for
next cycle.

Reported-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/CADvbK_ewub4ZZK-tZg8GBQbDFHWhd9a48C+AFXZ93pMsssCrUg@mail.gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-12-05 13:50:31 +01:00
parent b6cb3ccef6
commit afb9917d9b
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1 changed files with 14 additions and 5 deletions
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17
net/socket.c
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@ -503,14 +503,23 @@ EXPORT_SYMBOL(sock_alloc_file);
static int sock_map_fd(struct socket *sock, int flags)
{
int fd;
fd = FD_ADD(flags, sock_alloc_file(sock, flags, NULL));
if (fd < 0)
struct file *newfile;
int fd = get_unused_fd_flags(flags);
if (unlikely(fd < 0)) {
sock_release(sock);
return fd;
}
newfile = sock_alloc_file(sock, flags, NULL);
if (!IS_ERR(newfile)) {
fd_install(fd, newfile);
return fd;
}
put_unused_fd(fd);
return PTR_ERR(newfile);
}
/**
* sock_from_file - Return the &socket bounded to @file.
* @file: file