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authorStefan Richter <stefanr@s5r6.in-berlin.de>2008-05-01 10:43:04 +0200
committerStefan Richter <stefanr@s5r6.in-berlin.de>2008-05-01 19:55:23 +0200
commit07c7224cf74c3977c69c7c9a0b0fba264f2df36a (patch)
tree5631421f793e43e990820f33bdf6eb981f586792 /drivers/ieee1394
parente38649702ea64fdbbab3dd459bf8558142dd3bc4 (diff)
downloadblackbird-op-linux-07c7224cf74c3977c69c7c9a0b0fba264f2df36a.tar.gz
blackbird-op-linux-07c7224cf74c3977c69c7c9a0b0fba264f2df36a.zip
ieee1394: fix NULL pointer dereference in sysfs access
Regression since "ieee1394: prevent device binding of raw1394, video1394, dv1394", commit d2ace29fa44589da51fedc06a67b3f05301f3bfd: $ cat /sys/bus/ieee1394/drivers/raw1394/device_ids triggers a NULL pointer dereference in fw_show_drv_device_ids. Reported by Miles Lane. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Tested-by: Miles Lane <miles.lane@gmail.com>
Diffstat (limited to 'drivers/ieee1394')
-rw-r--r--drivers/ieee1394/nodemgr.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
index 70afa3786f3f..c6babe802a3b 100644
--- a/drivers/ieee1394/nodemgr.c
+++ b/drivers/ieee1394/nodemgr.c
@@ -520,8 +520,11 @@ static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
char *scratch = buf;
driver = container_of(drv, struct hpsb_protocol_driver, driver);
+ id = driver->id_table;
+ if (!id)
+ return 0;
- for (id = driver->id_table; id->match_flags != 0; id++) {
+ for (; id->match_flags != 0; id++) {
int need_coma = 0;
if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
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