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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2009-09-11 10:28:24 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-09-11 10:29:39 +0200 |
| commit | ab6aae09024be1b039df441fa1b64dbe092d0acb (patch) | |
| tree | 92f2d8612665b7c8257c48b61de7bce850012556 /drivers/s390/cio | |
| parent | [S390] cio: fix use after free in s390 debug feature (diff) | |
| download | linux-ab6aae09024be1b039df441fa1b64dbe092d0acb.tar.xz linux-ab6aae09024be1b039df441fa1b64dbe092d0acb.zip | |
[S390] cio: fix memleak in subchannel validation
When scanning for new subchannels we have a code path where we allocate
memory for a struct subchannel, set the device name (which is dynamically
allocated now) and do a check if the underlying device is blacklisted - if
so we free the subchannel structure.
Since we have not set up refcounting at this stage, the device name's memory
is lost. Fix this by moving the dev_set_name after the blacklist test.
Note: With this patch the init_name for the console subchannel becomes
virtually obsolete.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio')
| -rw-r--r-- | drivers/s390/cio/cio.c | 5 | ||||
| -rw-r--r-- | drivers/s390/cio/css.c | 5 |
2 files changed, 5 insertions, 5 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index 390b4e96fd0d..fe18ef691bb7 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -564,11 +564,6 @@ int cio_validate_subchannel(struct subchannel *sch, struct subchannel_id schid) goto out; } mutex_init(&sch->reg_mutex); - /* Set a name for the subchannel */ - if (cio_is_console(schid)) - sch->dev.init_name = cio_get_console_sch_name(schid); - else - dev_set_name(&sch->dev, "0.%x.%04x", schid.ssid, schid.sch_no); /* * The first subchannel that is not-operational (ccode==3) diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index 40d4b3093b71..0dc6f6d26287 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -183,6 +183,11 @@ static int css_sch_device_register(struct subchannel *sch) int ret; mutex_lock(&sch->reg_mutex); + if (cio_is_console(sch->schid)) + sch->dev.init_name = cio_get_console_sch_name(sch->schid); + else + dev_set_name(&sch->dev, "0.%x.%04x", sch->schid.ssid, + sch->schid.sch_no); ret = device_register(&sch->dev); mutex_unlock(&sch->reg_mutex); return ret; |