diff -ur a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp	2022-11-30 12:25:37.363419659 +0100
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp	2022-11-30 12:42:48.135412054 +0100
@@ -59,7 +59,9 @@
 
 #if !SANITIZER_ANDROID
 #include <fstab.h>
-#include <sys/mount.h>
+// sys/mount.h conflicts with linux/fs.h in glibc 2.36+
+// See https://sourceware.org/glibc/wiki/Release/2.36#Usage_of_.3Clinux.2Fmount.h.3E_and_.3Csys.2Fmount.h.3E
+// This has been fixed elsewhere, but apparently not in Fedora riscv.
 #include <sys/timeb.h>
 #include <utmpx.h>
 #endif