On 3/4/20 2:44 PM, Paolo Bonzini wrote:
On 04/03/20 14:12, Philippe Mathieu-Daudé wrote:
hw/scsi/spapr_vscsi.c:69:29: error: field 'iu' with variable sized type
'union viosrp_iu' not at the end of a struct or class is a GNU extension
[-Werror,-Wgnu-variable-sized-type-not-at-end]
union viosrp_iu iu;
^
Yay we found a bug! Thanks Gustavo :)
union srp_iu {
struct srp_login_req login_req;
struct srp_login_rsp login_rsp;
struct srp_login_rej login_rej;
struct srp_i_logout i_logout;
struct srp_t_logout t_logout;
struct srp_tsk_mgmt tsk_mgmt;
struct srp_cmd cmd;
struct srp_rsp rsp;
uint8_t reserved[SRP_MAX_IU_LEN];
};
It's variable-sized but it's okay as long as the total size doesn't
exceed SRP_MAX_IU_LEN. So it's not a bug, but I agree it's a time bomb.
Moving the field last should work, but it would still be quite
dangerous code.
Yeah I reached the same conclusion.
I'll send a fix for the dangerous code.
Do you want to drop this series, or only the change in 'struct srp_rsp'
(or in all hw/scsi/srp.h). Actually I guess it makes sense I move the
'hw/scsi/srp.h' changes with the series cleaning dangerous code.
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