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| author | Dan Carpenter <error27@gmail.com> | 2011-01-03 07:00:20 +0100 |
|---|---|---|
| committer | Joel Becker <joel.becker@oracle.com> | 2011-01-08 03:02:03 +0100 |
| commit | cc548166b2aadba7a566fb0a42884a9d2ff684b0 (patch) | |
| tree | 4f9a36e151bcc12670fa7d9e92aafd0d98754f26 | |
| parent | ocfs2: fix build for OCFS2_FS_STATS not enabled (diff) | |
| download | linux-cc548166b2aadba7a566fb0a42884a9d2ff684b0.tar.xz linux-cc548166b2aadba7a566fb0a42884a9d2ff684b0.zip | |
ocfs2/cluster: dereferencing before checking in nst_seq_show()
In the original code, we dereferenced "nst" before checking that it was
non-NULL. I moved the check forward and pulled the code in an indent
level.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
| -rw-r--r-- | fs/ocfs2/cluster/netdebug.c | 47 |
1 files changed, 24 insertions, 23 deletions
diff --git a/fs/ocfs2/cluster/netdebug.c b/fs/ocfs2/cluster/netdebug.c index 61df89cedded..3a5835904b3d 100644 --- a/fs/ocfs2/cluster/netdebug.c +++ b/fs/ocfs2/cluster/netdebug.c @@ -133,36 +133,37 @@ static int nst_seq_show(struct seq_file *seq, void *v) spin_lock(&o2net_debug_lock); nst = next_nst(dummy_nst); + if (!nst) + goto out; now = ktime_get(); sock = ktime_to_us(ktime_sub(now, nst->st_sock_time)); send = ktime_to_us(ktime_sub(now, nst->st_send_time)); status = ktime_to_us(ktime_sub(now, nst->st_status_time)); - if (nst != NULL) { - /* get_task_comm isn't exported. oh well. */ - seq_printf(seq, "%p:\n" - " pid: %lu\n" - " tgid: %lu\n" - " process name: %s\n" - " node: %u\n" - " sc: %p\n" - " message id: %d\n" - " message type: %u\n" - " message key: 0x%08x\n" - " sock acquiry: %lld usecs ago\n" - " send start: %lld usecs ago\n" - " wait start: %lld usecs ago\n", - nst, (unsigned long)task_pid_nr(nst->st_task), - (unsigned long)nst->st_task->tgid, - nst->st_task->comm, nst->st_node, - nst->st_sc, nst->st_id, nst->st_msg_type, - nst->st_msg_key, - (long long)sock, - (long long)send, - (long long)status); - } + /* get_task_comm isn't exported. oh well. */ + seq_printf(seq, "%p:\n" + " pid: %lu\n" + " tgid: %lu\n" + " process name: %s\n" + " node: %u\n" + " sc: %p\n" + " message id: %d\n" + " message type: %u\n" + " message key: 0x%08x\n" + " sock acquiry: %lld usecs ago\n" + " send start: %lld usecs ago\n" + " wait start: %lld usecs ago\n", + nst, (unsigned long)task_pid_nr(nst->st_task), + (unsigned long)nst->st_task->tgid, + nst->st_task->comm, nst->st_node, + nst->st_sc, nst->st_id, nst->st_msg_type, + nst->st_msg_key, + (long long)sock, + (long long)send, + (long long)status); +out: spin_unlock(&o2net_debug_lock); return 0; |