Commit d1ad09db authored by Committed by James BottomleyBrowse files
[SCSI] zfcp: fix use after free bug.
zfcp_erp_strategy_check_fsfreq() checks if it is safe to access the fsf_req associated with the erp_action that gets passed. To test if it is safe it accesses the fsf_req in order to get its index into the hash list. This is broken since the fsf_req might be freed already and the read index has no meaning. It could lead to memory corruption. Fix this by introducing a new zfcp_reqlist_find_safe() method which just checks if addresses are equal. This is slower, but only gets called in case of error recovery. Signed-off-by: Heiko Carstens <email@example.com> Signed-off-by: Martin Schwidefsky <firstname.lastname@example.org> Signed-off-by: Christof Schmitt <email@example.com> Signed-off-by: Martin Peschke <firstname.lastname@example.org> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>