linux-kernel - [PATCH 5/5] uprobes: use kmap_local_page() for temporary page mappings

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20260103084243.195125-6-ming.jvle@gmail.com>
Date: Sat,  3 Jan 2026 16:42:43 +0800
From: Keke Ming <ming.jvle@...il.com>
To: mhiramat@...nel.org,
	oleg@...hat.com,
	peterz@...radead.org
Cc: linux@...linux.org.uk,
	catalin.marinas@....com,
	will@...nel.org,
	tsbogend@...ha.franken.de,
	pjw@...nel.org,
	palmer@...belt.com,
	aou@...s.berkeley.edu,
	akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mips@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	Keke Ming <ming.jvle@...il.com>
Subject: [PATCH 5/5] uprobes: use kmap_local_page() for temporary page mappings

Replace deprecated kmap_atomic() with kmap_local_page().

Signed-off-by: Keke Ming <ming.jvle@...il.com>
---
 kernel/events/uprobes.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index d546d32390a8..a7d7d83ca1d7 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -179,16 +179,16 @@ bool __weak is_trap_insn(uprobe_opcode_t *insn)
 
 void uprobe_copy_from_page(struct page *page, unsigned long vaddr, void *dst, int len)
 {
-	void *kaddr = kmap_atomic(page);
+	void *kaddr = kmap_local_page(page);
 	memcpy(dst, kaddr + (vaddr & ~PAGE_MASK), len);
-	kunmap_atomic(kaddr);
+	kunmap_local(kaddr);
 }
 
 static void copy_to_page(struct page *page, unsigned long vaddr, const void *src, int len)
 {
-	void *kaddr = kmap_atomic(page);
+	void *kaddr = kmap_local_page(page);
 	memcpy(kaddr + (vaddr & ~PAGE_MASK), src, len);
-	kunmap_atomic(kaddr);
+	kunmap_local(kaddr);
 }
 
 static int verify_opcode(struct page *page, unsigned long vaddr, uprobe_opcode_t *insn,
@@ -323,7 +323,7 @@ __update_ref_ctr(struct mm_struct *mm, unsigned long vaddr, short d)
 		return ret == 0 ? -EBUSY : ret;
 	}
 
-	kaddr = kmap_atomic(page);
+	kaddr = kmap_local_page(page);
 	ptr = kaddr + (vaddr & ~PAGE_MASK);
 
 	if (unlikely(*ptr + d < 0)) {
@@ -336,7 +336,7 @@ __update_ref_ctr(struct mm_struct *mm, unsigned long vaddr, short d)
 	*ptr += d;
 	ret = 0;
 out:
-	kunmap_atomic(kaddr);
+	kunmap_local(kaddr);
 	put_page(page);
 	return ret;
 }
-- 
2.43.0