From: Tom Zanussi zanussi@kernel.org
commit 097f1eefedeab528cecbd35586dfe293853ffb17 upstream.
During expression parsing, a new expression field is created which should inherit the properties of the operands, such as size and is_signed.
is_signed propagation was missing, causing spurious errors with signed operands. Add it in parse_expr() and parse_unary() to fix the problem.
Link: https://lkml.kernel.org/r/f4dac08742fd7a0920bf80a73c6c44042f5eaa40.164331970...
Cc: stable@vger.kernel.org Fixes: 100719dcef447 ("tracing: Add simple expression support to hist triggers") Reported-by: Yordan Karadzhov ykaradzhov@vmware.com BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=215513 Signed-off-by: Tom Zanussi zanussi@kernel.org Signed-off-by: Steven Rostedt (Google) rostedt@goodmis.org [sudip: adjust context] Signed-off-by: Sudip Mukherjee sudipm.mukherjee@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- kernel/trace/trace_events_hist.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -2220,6 +2220,8 @@ static struct hist_field *parse_unary(st (HIST_FIELD_FL_TIMESTAMP | HIST_FIELD_FL_TIMESTAMP_USECS); expr->fn = hist_field_unary_minus; expr->operands[0] = operand1; + expr->size = operand1->size; + expr->is_signed = operand1->is_signed; expr->operator = FIELD_OP_UNARY_MINUS; expr->name = expr_str(expr, 0); expr->type = kstrdup_const(operand1->type, GFP_KERNEL); @@ -2359,6 +2361,7 @@ static struct hist_field *parse_expr(str
/* The operand sizes should be the same, so just pick one */ expr->size = operand1->size; + expr->is_signed = operand1->is_signed;
expr->operator = field_op; expr->name = expr_str(expr, 0);