diff options
| author | Johan Hovold <johan@kernel.org> | 2018-06-12 14:43:35 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2018-06-18 13:26:05 +0200 |
| commit | 6c974d4dfafe5e9ee754f2a6fba0eb1864f1649e (patch) | |
| tree | 11dc79e35c192a794f6e36e996651f727e5507d0 /drivers | |
| parent | 4708aa85d50cc6e962dfa8acf5ad4e0d290a21db (diff) | |
| download | linux-6c974d4dfafe5e9ee754f2a6fba0eb1864f1649e.tar.bz2 | |
EDAC, i7core: Fix memleaks and use-after-free on probe and remove
Make sure to free and deregister the addrmatch and chancounts devices
allocated during probe in all error paths. Also fix use-after-free in a
probe error path and in the remove success path where the devices were
being put before before deregistration.
Signed-off-by: Johan Hovold <johan@kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: linux-edac <linux-edac@vger.kernel.org>
Fixes: 356f0a30860d ("i7core_edac: change the mem allocation scheme to make Documentation/kobject.txt happy")
Link: http://lkml.kernel.org/r/20180612124335.6420-2-johan@kernel.org
Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/edac/i7core_edac.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c index 8ed4dd9c571b..8e120bf60624 100644 --- a/drivers/edac/i7core_edac.c +++ b/drivers/edac/i7core_edac.c @@ -1177,15 +1177,14 @@ static int i7core_create_sysfs_devices(struct mem_ctl_info *mci) rc = device_add(pvt->addrmatch_dev); if (rc < 0) - return rc; + goto err_put_addrmatch; if (!pvt->is_registered) { pvt->chancounts_dev = kzalloc(sizeof(*pvt->chancounts_dev), GFP_KERNEL); if (!pvt->chancounts_dev) { - put_device(pvt->addrmatch_dev); - device_del(pvt->addrmatch_dev); - return -ENOMEM; + rc = -ENOMEM; + goto err_del_addrmatch; } pvt->chancounts_dev->type = &all_channel_counts_type; @@ -1199,9 +1198,18 @@ static int i7core_create_sysfs_devices(struct mem_ctl_info *mci) rc = device_add(pvt->chancounts_dev); if (rc < 0) - return rc; + goto err_put_chancounts; } return 0; + +err_put_chancounts: + put_device(pvt->chancounts_dev); +err_del_addrmatch: + device_del(pvt->addrmatch_dev); +err_put_addrmatch: + put_device(pvt->addrmatch_dev); + + return rc; } static void i7core_delete_sysfs_devices(struct mem_ctl_info *mci) @@ -1211,11 +1219,11 @@ static void i7core_delete_sysfs_devices(struct mem_ctl_info *mci) edac_dbg(1, "\n"); if (!pvt->is_registered) { - put_device(pvt->chancounts_dev); device_del(pvt->chancounts_dev); + put_device(pvt->chancounts_dev); } - put_device(pvt->addrmatch_dev); device_del(pvt->addrmatch_dev); + put_device(pvt->addrmatch_dev); } /**************************************************************************** |