Merge branch 's3c-fixes' of git://aeryn.fluff.org.uk/bjdooks/linux

3 files changed, 22 insertions, 10 deletions

diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index fdffb413b192..f6b90240dd41 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -473,7 +473,6 @@ extern int  nfs_writepages(struct address_space *, struct writeback_control *);
 extern int  nfs_flush_incompatible(struct file *file, struct page *page);
 extern int  nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
 extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
-extern void nfs_writedata_release(void *);
 
 /*
  * Try to write back everything synchronously (but check the
@@ -488,7 +487,6 @@ extern int nfs_wb_page_cancel(struct inode *inode, struct page* page);
 extern int  nfs_commit_inode(struct inode *, int);
 extern struct nfs_write_data *nfs_commitdata_alloc(void);
 extern void nfs_commit_free(struct nfs_write_data *wdata);
-extern void nfs_commitdata_release(void *wdata);
 #else
 static inline int
 nfs_commit_inode(struct inode *inode, int how)
@@ -507,6 +505,7 @@ nfs_have_writebacks(struct inode *inode)
  * Allocate nfs_write_data structures
  */
 extern struct nfs_write_data *nfs_writedata_alloc(unsigned int npages);
+extern void nfs_writedata_free(struct nfs_write_data *);
 
 /*
  * linux/fs/nfs/read.c
@@ -515,7 +514,6 @@ extern int  nfs_readpage(struct file *, struct page *);
 extern int  nfs_readpages(struct file *, struct address_space *,
                 struct list_head *, unsigned);
 extern int  nfs_readpage_result(struct rpc_task *, struct nfs_read_data *);
-extern void nfs_readdata_release(void *data);
 extern int  nfs_readpage_async(struct nfs_open_context *, struct inode *,
                                struct page *);
 
@@ -523,6 +521,7 @@ extern int  nfs_readpage_async(struct nfs_open_context *, struct inode *,
  * Allocate nfs_read_data structures
  */
 extern struct nfs_read_data *nfs_readdata_alloc(unsigned int npages);
+extern void nfs_readdata_free(struct nfs_read_data *);
 
 /*
  * linux/fs/nfs3proc.c
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index a67dd5c5b6d3..a9d823a93fe8 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -121,7 +121,7 @@ enum perf_counter_sample_format {
         PERF_SAMPLE_CPU                         = 1U << 7,
         PERF_SAMPLE_PERIOD                      = 1U << 8,
         PERF_SAMPLE_STREAM_ID                   = 1U << 9,
-        PERF_SAMPLE_TP_RECORD                   = 1U << 10,
+        PERF_SAMPLE_RAW                         = 1U << 10,
 
         PERF_SAMPLE_MAX = 1U << 11,             /* non-ABI */
 };
@@ -369,6 +369,8 @@ enum perf_event_type {
          *
          *      { u64                   nr,
          *        u64                   ips[nr];  } && PERF_SAMPLE_CALLCHAIN
+         *      { u32                   size;
+         *        char                  data[size];}&& PERF_SAMPLE_RAW
          * };
          */
         PERF_EVENT_SAMPLE               = 9,
@@ -414,9 +416,9 @@ struct perf_callchain_entry {
         __u64                           ip[PERF_MAX_STACK_DEPTH];
 };
 
-struct perf_tracepoint_record {
-        int                             size;
-        char                            *record;
+struct perf_raw_record {
+        u32                             size;
+        void                            *data;
 };
 
 struct task_struct;
@@ -687,7 +689,7 @@ struct perf_sample_data {
         struct pt_regs                  *regs;
         u64                             addr;
         u64                             period;
-        void                            *private;
+        struct perf_raw_record          *raw;
 };
 
 extern int perf_counter_overflow(struct perf_counter *counter, int nmi,
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 7fb16d90e7b1..f64fbaae781a 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -637,12 +637,20 @@ __attribute__((section("_ftrace_events"))) event_##call = {		\
  *      pc = preempt_count();
  *
  *      __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
- *      __entry_size = __data_size + sizeof(*entry);
+ *
+ *      // Below we want to get the aligned size by taking into account
+ *      // the u32 field that will later store the buffer size
+ *      __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),
+ *                           sizeof(u64));
+ *      __entry_size -= sizeof(u32);
  *
  *      do {
  *              char raw_data[__entry_size]; <- allocate our sample in the stack
  *              struct trace_entry *ent;
  *
+ *              zero dead bytes from alignment to avoid stack leak to userspace:
+ *
+ *              *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL;
  *              entry = (struct ftrace_raw_<call> *)raw_data;
  *              ent = &entry->ent;
  *              tracing_generic_entry_update(ent, irq_flags, pc);
@@ -685,12 +693,15 @@ static void ftrace_profile_##call(proto)				\
         pc = preempt_count();                                           \
                                                                         \
         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
-        __entry_size = ALIGN(__data_size + sizeof(*entry), sizeof(u64));\
+        __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
+                             sizeof(u64));                              \
+        __entry_size -= sizeof(u32);                                    \
                                                                         \
         do {                                                            \
                 char raw_data[__entry_size];                            \
                 struct trace_entry *ent;                                \
                                                                         \
+                *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; \
                 entry = (struct ftrace_raw_##call *)raw_data;           \
                 ent = &entry->ent;                                      \
                 tracing_generic_entry_update(ent, irq_flags, pc);       \