From: Clément Léger <cleger@rivosinc.com>
Date: Tue, 9 Apr 2024 10:02:08 +0000 (+0200)
Subject: lib: sbi: sse: check handler entry to belong to supervisor mode
X-Git-Tag: v1.5~43
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=033104da08baf52c8b65b56a03363ea238c9ca31;p=platform%2Fkernel%2Fopensbi.git

lib: sbi: sse: check handler entry to belong to supervisor mode

When registering an SSE event, check for the handler_entry_pc to belong
to supervisor mode domain using sbi_domain_check_addr_range().

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reported-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
---

diff --git a/lib/sbi/sbi_sse.c b/lib/sbi/sbi_sse.c
index 76fbee4..18dfdb6 100644
--- a/lib/sbi/sbi_sse.c
+++ b/lib/sbi/sbi_sse.c
@@ -959,6 +959,12 @@ int sbi_sse_register(uint32_t event_id, unsigned long handler_entry_pc,
 	if (handler_entry_pc & 0x1)
 		return SBI_EINVAL;
 
+	if (!sbi_domain_check_addr_range(sbi_domain_thishart_ptr(),
+					 handler_entry_pc,
+					 sizeof(unsigned long), PRV_S,
+					 SBI_DOMAIN_EXECUTE))
+		return SBI_EINVALID_ADDR;
+
 	e = sse_event_get(event_id);
 	if (!e)
 		return SBI_EINVAL;