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| author |   Sebastian Ott <sebott@linux.vnet.ibm.com> | 2010-10-25 16:10:46 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-10-25 16:10:20 +0200 |
| commit | 26cffecf84c8cb33787dd13a72bd2124d107d413 (patch) | |
| tree | aa50aaad1c06c9a3adb5d5bc15066f6167c2851d /drivers/s390 | |
| parent | [S390] kvm: Fix badness at include/asm/mmu_context.h:83 (diff) | |
| download | linux-dev-26cffecf84c8cb33787dd13a72bd2124d107d413.tar.xz linux-dev-26cffecf84c8cb33787dd13a72bd2124d107d413.zip | |
[S390] dasd: fix use after free in dbf
Writing to /proc/dasd/statistics while the debug level of the
generic dasd debug entry is set to DBF_DEBUG will lead to an
use after free when accessing the debug entry later.
Since for the format string "%s" in the s390 dbf only a pointer
to the string is stored in the debug feature and the buffer used
here is freed afterwards.
To fix this just remove the debug message.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/block/dasd_proc.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c index 2eb025592809..c4a6a31bd9cd 100644 --- a/drivers/s390/block/dasd_proc.c +++ b/drivers/s390/block/dasd_proc.c @@ -251,7 +251,6 @@ static ssize_t dasd_stats_proc_write(struct file *file, buffer = dasd_get_user_string(user_buf, user_len); if (IS_ERR(buffer)) return PTR_ERR(buffer); - DBF_EVENT(DBF_DEBUG, "/proc/dasd/statictics: '%s'\n", buffer); /* check for valid verbs */ str = skip_spaces(buffer); |