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| author |   Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2014-06-20 23:31:26 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2014-07-01 07:13:37 -0400 |
| commit | 6d2289f3faa71dcc5bba15c7aeba4f31c185b6df (patch) | |
| tree | 8425f1195f29a670dcb1ad00e56ee1836514ab02 /kernel/trace/trace_output.h | |
| parent | tracing: Clean up trace_seq.c (diff) | |
| download | linux-dev-6d2289f3faa71dcc5bba15c7aeba4f31c185b6df.tar.xz linux-dev-6d2289f3faa71dcc5bba15c7aeba4f31c185b6df.zip | |
tracing: Make trace_seq_putmem_hex() more robust
Currently trace_seq_putmem_hex() can only take as a parameter a pointer
to something that is 8 bytes or less, otherwise it will overflow the
buffer. This is protected by a macro that encompasses the call to
trace_seq_putmem_hex() that has a BUILD_BUG_ON() for the variable before
it is passed in. This is not very robust and if trace_seq_putmem_hex() ever
gets used outside that macro it will cause issues.
Instead of only being able to produce a hex output of memory that is for
a single word, change it to be more robust and allow any size input.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_output.h')
| -rw-r--r-- | kernel/trace/trace_output.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/trace/trace_output.h b/kernel/trace/trace_output.h index bf7daf2237ed..80b25b585a70 100644 --- a/kernel/trace/trace_output.h +++ b/kernel/trace/trace_output.h @@ -43,7 +43,6 @@ do { \ #define SEQ_PUT_HEX_FIELD_RET(s, x) \ do { \ - BUILD_BUG_ON(sizeof(x) > MAX_MEMHEX_BYTES); \ if (!trace_seq_putmem_hex(s, &(x), sizeof(x))) \ return TRACE_TYPE_PARTIAL_LINE; \ } while (0) |