[PATCH] libtracefs: Make sure 32 bit works on 64 bit file systems

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From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>

As stat() can overflow if a 32 bit user space reads a file on a file
system that has inodes greater than MAX_INT. Compile with
_FILE_OFFSET_BITS=64 that mitigates this problem on 32 bit user space.

Reported-by: Mike Frysinger <vapier@xxxxxxxxxx>
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
---
 Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Makefile b/Makefile
index 27d425c975ad..36c2076cf788 100644
--- a/Makefile
+++ b/Makefile
@@ -164,6 +164,9 @@ export INCLUDES
 # Append required CFLAGS
 override CFLAGS += -D_GNU_SOURCE $(LIBTRACEEVENT_INCLUDES) $(INCLUDES)
 
+# Make sure 32 bit stat() works on large file systems
+override CFLAGS += -D_FILE_OFFSET_BITS=64
+
 all: all_cmd
 
 LIB_TARGET  = libtracefs.a libtracefs.so.$(TRACEFS_VERSION)
-- 
2.35.1




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