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authorSebastian Ott <sebott@linux.vnet.ibm.com>2010-10-25 16:10:46 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-10-25 16:10:20 +0200
commit26cffecf84c8cb33787dd13a72bd2124d107d413 (patch)
treeaa50aaad1c06c9a3adb5d5bc15066f6167c2851d /drivers/s390/block
parente05ef9bdb899e2f3798be74691842fc597d8ce60 (diff)
downloadblackbird-op-linux-26cffecf84c8cb33787dd13a72bd2124d107d413.tar.gz
blackbird-op-linux-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/block')
-rw-r--r--drivers/s390/block/dasd_proc.c1
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);
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