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Add NULL check for cmsg in receive_fd to prevent segfault

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This commit is contained in:
Antonio SJ Musumeci 2026-03-10 10:58:01 -05:00
parent b768ba8ce1
commit cc67e791bf
1 changed files with 14 additions and 5 deletions
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19
vendored/libfuse/lib/mount_generic.c
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@ -259,11 +259,20 @@ static int receive_fd(int fd)
}
cmsg = CMSG_FIRSTHDR(&msg);
if (cmsg->cmsg_type != SCM_RIGHTS) {
fprintf(stderr, "got control message of unknown type %d\n",
cmsg->cmsg_type);
return -1;
}
if(!cmsg)
{
fprintf(stderr,"no control message received or not enough buf space\n");
return -1;
}
if(cmsg->cmsg_type != SCM_RIGHTS)
{
fprintf(stderr,
"got control message of unknown type %d\n",
cmsg->cmsg_type);
return -1;
}
return *(int*)CMSG_DATA(cmsg);
}