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diff --git a/sys/kern/kern_vnodedumper.c b/sys/kern/kern_vnodedumper.c
--- a/sys/kern/kern_vnodedumper.c
+++ b/sys/kern/kern_vnodedumper.c
@@ -133,8 +133,10 @@
if (error != 0)
goto out;
+ curthread->td_pflags2 |= TDP2_SAN_QUIET;
dump_savectx();
error = minidumpsys(livedi, true);
+ curthread->td_pflags2 &= ~TDP2_SAN_QUIET;
EVENTHANDLER_INVOKE(livedumper_finish);
out:
diff --git a/sys/kern/subr_asan.c b/sys/kern/subr_asan.c
--- a/sys/kern/subr_asan.c
+++ b/sys/kern/subr_asan.c
@@ -405,6 +405,9 @@
if (__predict_false(!kasan_enabled))
return;
+ if (__predict_false(curthread != NULL &&
+ (curthread->td_pflags2 & TDP2_SAN_QUIET) != 0))
+ return;
if (__predict_false(size == 0))
return;
if (__predict_false(kasan_md_unsupported(addr)))
diff --git a/sys/kern/subr_msan.c b/sys/kern/subr_msan.c
--- a/sys/kern/subr_msan.c
+++ b/sys/kern/subr_msan.c
@@ -179,6 +179,9 @@
if (__predict_false(KERNEL_PANICKED() || kdb_active || kmsan_reporting))
return;
+ if (__predict_false(curthread != NULL &&
+ (curthread->td_pflags2 & TDP2_SAN_QUIET) != 0))
+ return;
kmsan_reporting = true;
__compiler_membar();
@@ -232,6 +235,9 @@
if (__predict_false(KERNEL_PANICKED() || kdb_active || kmsan_reporting))
return;
+ if (__predict_false(curthread != NULL &&
+ (curthread->td_pflags2 & TDP2_SAN_QUIET) != 0))
+ return;
kmsan_reporting = true;
__compiler_membar();
diff --git a/sys/sys/proc.h b/sys/sys/proc.h
--- a/sys/sys/proc.h
+++ b/sys/sys/proc.h
@@ -567,6 +567,7 @@
#define TDP2_SBPAGES 0x00000001 /* Owns sbusy on some pages */
#define TDP2_COMPAT32RB 0x00000002 /* compat32 ABI for robust lists */
#define TDP2_ACCT 0x00000004 /* Doing accounting */
+#define TDP2_SAN_QUIET 0x00000008 /* Disable warnings from K(A|M)SAN */
/*
* Reasons that the current thread can not be run yet.

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