From 1283c0d1a32bb924324481586b5d6e8e76f676ba Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Wed, 29 Sep 2021 21:04:20 -0500 Subject: scsi: target: Fix alua_tg_pt_gps_count tracking We can't free the tg_pt_gp in core_alua_set_tg_pt_gp_id() because it's still accessed via configfs. Its release must go through the normal configfs/refcount process. The max alua_tg_pt_gps_count check should probably have been done in core_alua_allocate_tg_pt_gp(), but with the current code userspace could have created 0x0000ffff + 1 groups, but only set the id for 0x0000ffff. Then it could have deleted a group with an ID set, and then set the ID for that extra group and it would work ok. It's unlikely, but just in case this patch continues to allow that type of behavior, and just fixes the kfree() while in use bug. Link: https://lore.kernel.org/r/20210930020422.92578-4-michael.christie@oracle.com Signed-off-by: Mike Christie Signed-off-by: Martin K. Petersen --- drivers/target/target_core_alua.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/target/target_core_alua.c') diff --git a/drivers/target/target_core_alua.c b/drivers/target/target_core_alua.c index cb1de1ecaaa6..bd0f2ce011dd 100644 --- a/drivers/target/target_core_alua.c +++ b/drivers/target/target_core_alua.c @@ -1674,7 +1674,6 @@ int core_alua_set_tg_pt_gp_id( pr_err("Maximum ALUA alua_tg_pt_gps_count:" " 0x0000ffff reached\n"); spin_unlock(&dev->t10_alua.tg_pt_gps_lock); - kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); return -ENOSPC; } again: -- cgit