[PATCH 01/28] xor: assert that xor_blocks is not call from interrupt context
From: Christoph Hellwig <hch@lst.de>
Date: 2026-03-27 06:17:59
Also in:
linux-alpha, linux-arch, linux-btrfs, linux-crypto, linux-raid, linux-riscv, linux-s390, linux-um, lkml, loongarch, sparclinux
Subsystem:
crypto api, the rest · Maintainers:
Herbert Xu, "David S. Miller", Linus Torvalds
Most of the optimized xor_blocks versions require FPU/vector registers, which generally are not supported in interrupt context. Both callers already are in user context, so enforce this at the highest level. Signed-off-by: Christoph Hellwig <hch@lst.de> --- crypto/xor.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/crypto/xor.c b/crypto/xor.c
index f39621a57bb3..df530ddc9f06 100644
--- a/crypto/xor.c
+++ b/crypto/xor.c@@ -28,6 +28,8 @@ xor_blocks(unsigned int src_count, unsigned int bytes, void *dest, void **srcs) { unsigned long *p1, *p2, *p3, *p4; + WARN_ON_ONCE(!in_task() || irqs_disabled() || softirq_count()); + p1 = (unsigned long *) srcs[0]; if (src_count == 1) { active_template->do_2(bytes, dest, p1);
--
2.47.3