diff options
| author | Maurizio Lombardi <mlombard@redhat.com> | 2023-04-07 15:00:33 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-04-11 20:49:43 -0400 |
| commit | a0fde512f7030e7fbdd5f0d8d70908d37389aae2 (patch) | |
| tree | 1bee7647a4b17b30f047158d562fc596d0ff2111 /drivers/target | |
| parent | dc70c9615c067dbc34a1af736477f7d2b7f75319 (diff) | |
| download | linux-a0fde512f7030e7fbdd5f0d8d70908d37389aae2.tar.gz | |
scsi: target: core: Fix invalid memory access
nr_attrs should start counting from zero, otherwise we will end up
dereferencing an invalid memory address.
$ targetcli /loopback create
general protection fault
RIP: 0010:configfs_create_file+0x12/0x70
Call Trace:
<TASK>
configfs_attach_item.part.0+0x5f/0x150
configfs_attach_group.isra.0+0x49/0x120
configfs_mkdir+0x24f/0x4d0
vfs_mkdir+0x192/0x240
do_mkdirat+0x131/0x160
__x64_sys_mkdir+0x48/0x70
do_syscall_64+0x5c/0x90
Fixes: 31177b74790c ("scsi: target: core: Add RTPI attribute for target port")
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Link: https://lore.kernel.org/r/20230407130033.556644-1-mlombard@redhat.com
Acked-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_fabric_configfs.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c index 0ce47e21e0c8d9..b7c637644cd48d 100644 --- a/drivers/target/target_core_fabric_configfs.c +++ b/drivers/target/target_core_fabric_configfs.c @@ -885,7 +885,7 @@ target_fabric_setup_tpg_base_cit(struct target_fabric_configfs *tf) { struct config_item_type *cit = &tf->tf_tpg_base_cit; struct configfs_attribute **attrs = NULL; - size_t nr_attrs = 1; + size_t nr_attrs = 0; int i = 0; if (tf->tf_ops->tfc_tpg_base_attrs) @@ -895,8 +895,8 @@ target_fabric_setup_tpg_base_cit(struct target_fabric_configfs *tf) if (tf->tf_ops->fabric_enable_tpg) nr_attrs++; - if (nr_attrs == 0) - goto done; + /* + 1 for target_fabric_tpg_base_attr_rtpi */ + nr_attrs++; /* + 1 for final NULL in the array */ attrs = kcalloc(nr_attrs + 1, sizeof(*attrs), GFP_KERNEL); @@ -912,7 +912,6 @@ target_fabric_setup_tpg_base_cit(struct target_fabric_configfs *tf) attrs[i++] = &target_fabric_tpg_base_attr_rtpi; -done: cit->ct_item_ops = &target_fabric_tpg_base_item_ops; cit->ct_attrs = attrs; cit->ct_owner = tf->tf_ops->module; |