drivers/block/drbd/drbd_state.c:1629:3: warning: cast from 'int (*)(struct sk_buff *, unsigned int, struct drbd_resource_state_change *, enum drbd_notification_type)' to 'typeof (last_func)' (aka 'int (*)(struct sk_buff *, unsigned int, void *, enum drbd_...
From: kernel test robot
Date: Sun Nov 05 2023 - 22:37:55 EST
Hi Lv,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 77fa2fbe87fc605c4bfa87dff87be9bfded0e9a3
commit: aadb22ba2f656581b2f733deb3a467c48cc618f6 drbd: Fix five use after free bugs in get_initial_state
date: 1 year, 7 months ago
config: x86_64-randconfig-012-20230909 (https://download.01.org/0day-ci/archive/20231106/202311061159.cpOTZn3O-lkp@xxxxxxxxx/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231106/202311061159.cpOTZn3O-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311061159.cpOTZn3O-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
>> drivers/block/drbd/drbd_state.c:1629:3: warning: cast from 'int (*)(struct sk_buff *, unsigned int, struct drbd_resource_state_change *, enum drbd_notification_type)' to 'typeof (last_func)' (aka 'int (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)') converts to incompatible function type [-Wcast-function-type-strict]
REMEMBER_STATE_CHANGE(notify_resource_state_change,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/block/drbd/drbd_state.c:1616:17: note: expanded from macro 'REMEMBER_STATE_CHANGE'
last_func = (typeof(last_func))func; \
^~~~~~~~~~~~~~~~~~~~~~~
>> drivers/block/drbd/drbd_state.c:1638:4: warning: cast from 'int (*)(struct sk_buff *, unsigned int, struct drbd_connection_state_change *, enum drbd_notification_type)' to 'typeof (last_func)' (aka 'int (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)') converts to incompatible function type [-Wcast-function-type-strict]
REMEMBER_STATE_CHANGE(notify_connection_state_change,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/block/drbd/drbd_state.c:1616:17: note: expanded from macro 'REMEMBER_STATE_CHANGE'
last_func = (typeof(last_func))func; \
^~~~~~~~~~~~~~~~~~~~~~~
>> drivers/block/drbd/drbd_state.c:1647:4: warning: cast from 'int (*)(struct sk_buff *, unsigned int, struct drbd_device_state_change *, enum drbd_notification_type)' to 'typeof (last_func)' (aka 'int (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)') converts to incompatible function type [-Wcast-function-type-strict]
REMEMBER_STATE_CHANGE(notify_device_state_change,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/block/drbd/drbd_state.c:1616:17: note: expanded from macro 'REMEMBER_STATE_CHANGE'
last_func = (typeof(last_func))func; \
^~~~~~~~~~~~~~~~~~~~~~~
>> drivers/block/drbd/drbd_state.c:1661:4: warning: cast from 'int (*)(struct sk_buff *, unsigned int, struct drbd_peer_device_state_change *, enum drbd_notification_type)' to 'typeof (last_func)' (aka 'int (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)') converts to incompatible function type [-Wcast-function-type-strict]
REMEMBER_STATE_CHANGE(notify_peer_device_state_change,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/block/drbd/drbd_state.c:1616:17: note: expanded from macro 'REMEMBER_STATE_CHANGE'
last_func = (typeof(last_func))func; \
^~~~~~~~~~~~~~~~~~~~~~~
4 warnings generated.
vim +1629 drivers/block/drbd/drbd_state.c
a29728463b254c Andreas Gruenbacher 2014-07-31 1599
a29728463b254c Andreas Gruenbacher 2014-07-31 1600 static void broadcast_state_change(struct drbd_state_change *state_change)
a29728463b254c Andreas Gruenbacher 2014-07-31 1601 {
a29728463b254c Andreas Gruenbacher 2014-07-31 1602 struct drbd_resource_state_change *resource_state_change = &state_change->resource[0];
a29728463b254c Andreas Gruenbacher 2014-07-31 1603 bool resource_state_has_changed;
a29728463b254c Andreas Gruenbacher 2014-07-31 1604 unsigned int n_device, n_connection, n_peer_device, n_peer_devices;
aadb22ba2f6565 Lv Yunlong 2022-04-06 1605 int (*last_func)(struct sk_buff *, unsigned int, void *,
a29728463b254c Andreas Gruenbacher 2014-07-31 1606 enum drbd_notification_type) = NULL;
805cdb8bc6da87 Kees Cook 2020-06-03 1607 void *last_arg = NULL;
a29728463b254c Andreas Gruenbacher 2014-07-31 1608
a29728463b254c Andreas Gruenbacher 2014-07-31 1609 #define HAS_CHANGED(state) ((state)[OLD] != (state)[NEW])
a29728463b254c Andreas Gruenbacher 2014-07-31 1610 #define FINAL_STATE_CHANGE(type) \
a29728463b254c Andreas Gruenbacher 2014-07-31 1611 ({ if (last_func) \
a29728463b254c Andreas Gruenbacher 2014-07-31 1612 last_func(NULL, 0, last_arg, type); \
a29728463b254c Andreas Gruenbacher 2014-07-31 1613 })
a29728463b254c Andreas Gruenbacher 2014-07-31 1614 #define REMEMBER_STATE_CHANGE(func, arg, type) \
a29728463b254c Andreas Gruenbacher 2014-07-31 1615 ({ FINAL_STATE_CHANGE(type | NOTIFY_CONTINUES); \
a29728463b254c Andreas Gruenbacher 2014-07-31 @1616 last_func = (typeof(last_func))func; \
a29728463b254c Andreas Gruenbacher 2014-07-31 1617 last_arg = arg; \
a29728463b254c Andreas Gruenbacher 2014-07-31 1618 })
a29728463b254c Andreas Gruenbacher 2014-07-31 1619
a29728463b254c Andreas Gruenbacher 2014-07-31 1620 mutex_lock(¬ification_mutex);
a29728463b254c Andreas Gruenbacher 2014-07-31 1621
a29728463b254c Andreas Gruenbacher 2014-07-31 1622 resource_state_has_changed =
a29728463b254c Andreas Gruenbacher 2014-07-31 1623 HAS_CHANGED(resource_state_change->role) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1624 HAS_CHANGED(resource_state_change->susp) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1625 HAS_CHANGED(resource_state_change->susp_nod) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1626 HAS_CHANGED(resource_state_change->susp_fen);
a29728463b254c Andreas Gruenbacher 2014-07-31 1627
a29728463b254c Andreas Gruenbacher 2014-07-31 1628 if (resource_state_has_changed)
a29728463b254c Andreas Gruenbacher 2014-07-31 @1629 REMEMBER_STATE_CHANGE(notify_resource_state_change,
a29728463b254c Andreas Gruenbacher 2014-07-31 1630 resource_state_change, NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1631
a29728463b254c Andreas Gruenbacher 2014-07-31 1632 for (n_connection = 0; n_connection < state_change->n_connections; n_connection++) {
a29728463b254c Andreas Gruenbacher 2014-07-31 1633 struct drbd_connection_state_change *connection_state_change =
a29728463b254c Andreas Gruenbacher 2014-07-31 1634 &state_change->connections[n_connection];
a29728463b254c Andreas Gruenbacher 2014-07-31 1635
a29728463b254c Andreas Gruenbacher 2014-07-31 1636 if (HAS_CHANGED(connection_state_change->peer_role) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1637 HAS_CHANGED(connection_state_change->cstate))
a29728463b254c Andreas Gruenbacher 2014-07-31 @1638 REMEMBER_STATE_CHANGE(notify_connection_state_change,
a29728463b254c Andreas Gruenbacher 2014-07-31 1639 connection_state_change, NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1640 }
a29728463b254c Andreas Gruenbacher 2014-07-31 1641
a29728463b254c Andreas Gruenbacher 2014-07-31 1642 for (n_device = 0; n_device < state_change->n_devices; n_device++) {
a29728463b254c Andreas Gruenbacher 2014-07-31 1643 struct drbd_device_state_change *device_state_change =
a29728463b254c Andreas Gruenbacher 2014-07-31 1644 &state_change->devices[n_device];
a29728463b254c Andreas Gruenbacher 2014-07-31 1645
a29728463b254c Andreas Gruenbacher 2014-07-31 1646 if (HAS_CHANGED(device_state_change->disk_state))
a29728463b254c Andreas Gruenbacher 2014-07-31 @1647 REMEMBER_STATE_CHANGE(notify_device_state_change,
a29728463b254c Andreas Gruenbacher 2014-07-31 1648 device_state_change, NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1649 }
a29728463b254c Andreas Gruenbacher 2014-07-31 1650
a29728463b254c Andreas Gruenbacher 2014-07-31 1651 n_peer_devices = state_change->n_devices * state_change->n_connections;
a29728463b254c Andreas Gruenbacher 2014-07-31 1652 for (n_peer_device = 0; n_peer_device < n_peer_devices; n_peer_device++) {
a29728463b254c Andreas Gruenbacher 2014-07-31 1653 struct drbd_peer_device_state_change *p =
a29728463b254c Andreas Gruenbacher 2014-07-31 1654 &state_change->peer_devices[n_peer_device];
a29728463b254c Andreas Gruenbacher 2014-07-31 1655
a29728463b254c Andreas Gruenbacher 2014-07-31 1656 if (HAS_CHANGED(p->disk_state) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1657 HAS_CHANGED(p->repl_state) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1658 HAS_CHANGED(p->resync_susp_user) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1659 HAS_CHANGED(p->resync_susp_peer) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1660 HAS_CHANGED(p->resync_susp_dependency))
a29728463b254c Andreas Gruenbacher 2014-07-31 @1661 REMEMBER_STATE_CHANGE(notify_peer_device_state_change,
a29728463b254c Andreas Gruenbacher 2014-07-31 1662 p, NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1663 }
a29728463b254c Andreas Gruenbacher 2014-07-31 1664
a29728463b254c Andreas Gruenbacher 2014-07-31 1665 FINAL_STATE_CHANGE(NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1666 mutex_unlock(¬ification_mutex);
a29728463b254c Andreas Gruenbacher 2014-07-31 1667
:::::: The code at line 1629 was first introduced by commit
:::::: a29728463b254ce81ecefdf20c1a02e01d9361da drbd: Backport the "events2" command
:::::: TO: Andreas Gruenbacher <agruen@xxxxxxxxxx>
:::::: CC: Jens Axboe <axboe@xxxxxx>
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