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authorDan Rosenberg <drosenberg@vsecurity.com>2011-03-23 10:53:41 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2011-04-14 16:53:39 -0700
commit0042e3362775373d95cc198100cc4e31ce09e9cc (patch)
treeb8da4dcd3d8f0ddc3ce5dbbdacfa664ef09bb82d /sound/oss/dev_table.h
parentd343ebc44f5ae510e97c9e9f0f915a1e987f10d3 (diff)
downloadlinux-linaro-stable-0042e3362775373d95cc198100cc4e31ce09e9cc.tar.gz
sound/oss: remove offset from load_patch callbacks
commit b769f49463711205d57286e64cf535ed4daf59e9 upstream. Was: [PATCH] sound/oss/midi_synth: prevent underflow, use of uninitialized value, and signedness issue The offset passed to midi_synth_load_patch() can be essentially arbitrary. If it's greater than the header length, this will result in a copy_from_user(dst, src, negative_val). While this will just return -EFAULT on x86, on other architectures this may cause memory corruption. Additionally, the length field of the sysex_info structure may not be initialized prior to its use. Finally, a signed comparison may result in an unintentionally large loop. On suggestion by Takashi Iwai, version two removes the offset argument from the load_patch callbacks entirely, which also resolves similar issues in opl3. Compile tested only. v3 adjusts comments and hopefully gets copy offsets right. Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'sound/oss/dev_table.h')
-rw-r--r--sound/oss/dev_table.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/oss/dev_table.h b/sound/oss/dev_table.h
index b7617bee6388..0199a317c5a9 100644
--- a/sound/oss/dev_table.h
+++ b/sound/oss/dev_table.h
@@ -271,7 +271,7 @@ struct synth_operations
void (*reset) (int dev);
void (*hw_control) (int dev, unsigned char *event);
int (*load_patch) (int dev, int format, const char __user *addr,
- int offs, int count, int pmgr_flag);
+ int count, int pmgr_flag);
void (*aftertouch) (int dev, int voice, int pressure);
void (*controller) (int dev, int voice, int ctrl_num, int value);
void (*panning) (int dev, int voice, int value);