path: root/arch/x86_64/bits/fcntl.h
diff options
authorRich Felker <>2020-09-03 17:37:11 -0400
committerRich Felker <>2020-09-03 17:37:11 -0400
commitb8b729bd22c28c9116c2fce65dce207a35299c26 (patch)
tree8a44d7f01cd53d1e03a8345a82b3b784de3f8091 /arch/x86_64/bits/fcntl.h
parent262003ad9d8894c03fa4b033140e1e14e4c24c4d (diff)
fix missing O_LARGEFILE values on x86_64, x32, and mips64
prior to commit 685e40bb09f5f24a2af54ea09c97328808f76990, x86_64 was correctly passing O_LARGEFILE to SYS_open; it was removed (defined to 0 in the public header, and changed to use the public definition) as part of that change, probably out of a mistaken belief that it's not needed. however, on a mixed system with 32-bit and 64-bit binaries, it's important that all files be opened with O_LARGEFILE, even if the opening process is 64-bit, in case a descriptor is passed to a 32-bit process. otherwise, attempts to access past 2GB in the 32-bit process could produce EOVERFLOW. most 64-bit archs added later got this right alread, except for mips64. x32 was also affected. there are now fixed.
Diffstat (limited to 'arch/x86_64/bits/fcntl.h')
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86_64/bits/fcntl.h b/arch/x86_64/bits/fcntl.h
index 1b88ad39..08627f81 100644
--- a/arch/x86_64/bits/fcntl.h
+++ b/arch/x86_64/bits/fcntl.h
@@ -13,7 +13,7 @@
#define O_ASYNC 020000
#define O_DIRECT 040000
-#define O_LARGEFILE 0
+#define O_LARGEFILE 0100000
#define O_NOATIME 01000000
#define O_PATH 010000000
#define O_TMPFILE 020200000