From: David S. Miller Date: Tue, 29 Mar 2011 17:18:39 +0000 (-0300) Subject: perf symbols: Properly align symbol_conf.priv_size X-Git-Tag: firefly_0821_release~7613^2~1706^2~7 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4d439517561d009e170e2fe20be1ba25e19abe75;p=firefly-linux-kernel-4.4.55.git perf symbols: Properly align symbol_conf.priv_size If symbol_conf.priv_size is not a multiple of "sizeof(u64)" we'll bus error on sparc64 in symbol__new because the "struct symbol *" pointer is computed by adding symbol_conf.priv_size to the memory allocated. We cannot isolate the fix to symbol__new and symbol__delete since the private area is computed by subtracting the priv_size value from a "struct symbol" pointer, so then the private area can still be potentially unaligned. So, simply align the symbol_conf.priv_size value in symbol__init() Cc: Ingo Molnar Cc: Paul Mackerras Cc: Peter Zijlstra LKML-Reference: <20110328.175849.112593455.davem@davemloft.net> Signed-off-by: David S. Miller Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 8f73907a959e..f06c10f092ba 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -2406,6 +2406,8 @@ int symbol__init(void) if (symbol_conf.initialized) return 0; + symbol_conf.priv_size = ALIGN(symbol_conf.priv_size, sizeof(u64)); + elf_version(EV_CURRENT); if (symbol_conf.sort_by_name) symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -