On 10/28/25 17:20, Peter Maydell wrote:
If you pass sendto() a NULL buffer, this is usually an error
(causing an EFAULT return); however if you pass a 0 length then
we should not try to validate the buffer provided. Instead we
skip the copying of the user data and possible processing
through fd_trans_target_to_host_data, and call the host syscall
with NULL, 0.
(unlock_user() permits a NULL buffer pointer for "do nothing"
so we don't need to special case the unlock code.)
Cc: [email protected]
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/3102
Signed-off-by: Peter Maydell <[email protected]>
Reviewed-by: Michael Tokarev <[email protected]>
I wanted to fix that for quite some time.. :)
Thanks,
/mjt
