fergalmoran/ladybird
1
0
Fork 0
mirror of https://github.com/fergalmoran/ladybird.git synced 2025-12-22 09:19:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

Kernel: Don't try to copy empty Vector in sys$recvmsg

Browse Source 
If there's no fds to copy in a message with proper space for an
SCM_RIGHTS set of cmsg headers, then don't try to copy them.

This avoids a Kernel panic when recvmsg-ing, as copy_to_user(p, 0, 0)
hits a VERIFY.
This commit is contained in:
Andrew Kaster
2024-04-17 18:09:21 -06:00
committed by Tim Flynn
parent 3568215790
commit a65c385057
1 changed files with 2 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
Kernel/Syscalls/socket.cpp
View File

@@ -322,6 +322,7 @@ ErrorOr<FlatPtr> Process::sys$recvmsg(int sockfd, Userspace<struct msghdr*> user
m_fds.with_exclusive([&](auto& fds) { fds[fd_allocation.fd].set(*description, 0); }); m_fds.with_exclusive([&](auto& fds) { fds[fd_allocation.fd].set(*description, 0); });
fdnums.append(fd_allocation.fd); fdnums.append(fd_allocation.fd);
} }
if (!fdnums.is_empty())
TRY(try_add_cmsg(SOL_SOCKET, SCM_RIGHTS, fdnums.data(), fdnums.size() * sizeof(int))); TRY(try_add_cmsg(SOL_SOCKET, SCM_RIGHTS, fdnums.data(), fdnums.size() * sizeof(int)));
} }