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Wed, 25 Feb 2026 08:15:08 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.55]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 860561800465; Wed, 25 Feb 2026 08:14:58 +0000 (UTC) From: Baoquan He To: kasan-dev@googlegroups.com Cc: linux-mm@kvack.org, andreyknvl@gmail.com, ryabinin.a.a@gmail.com, glider@google.com, dvyukov@google.com, linux-kernel@vger.kernel.org, linux-um@lists.infradead.org, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, x86@kernel.org, chris@zankel.net, jcmvbkbc@gmail.com, linux-s390@vger.kernel.org, hca@linux.ibm.com, Baoquan He Subject: [PATCH v5 03/15] mm/kasan: mm/kasan: move kasan= code to common place Date: Wed, 25 Feb 2026 16:14:00 +0800 Message-ID: <20260225081412.76502-4-bhe@redhat.com> In-Reply-To: <20260225081412.76502-1-bhe@redhat.com> References: <20260225081412.76502-1-bhe@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 X-Mimecast-MFC-PROC-ID: 6fn0ZtSPdQt5aP9fM0rdg9XN9RVGdhINC6nd2Iaus4c_1772007308 X-Mimecast-Originator: redhat.com Content-type: text/plain Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: 40B21160005 X-Rspamd-Server: rspam02 X-Stat-Signature: p5u4jrmepteeaj39us7kt6pwj67maobm X-HE-Tag: 1772007319-805232 X-HE-Meta: U2FsdGVkX1/bQbpal6ZKOCUMoq3/Ol7Z9Gq1nC0iCy9Dm2Z7uMB3b8BfhRWEDktQXBOv+F5QKlWc8xXx6xFDnI27qDsnBlzrEUL/ffgODHEjk6Sexisd4KB8ND0gpUlA99S14g3ujPzbry1iPrlDyO6GVEXPPMa8MQ7VrIoXpzzaytcO/zgMksGuEmVVoxiNyZmHlaTt8prE8AJGwL34R/k6NvEwlQeZ4TtTfywXt+5UKsouVi/3HYBsBNmu408vhXO6xtp13cZ7Bwvx27D4iZKpiWz5P6+9Is8pUoF+IQACyG7gWZsF2Lal5JV90M+1eclDRetZ1QQ/YB1fOcRKmJPSh3kF0AIVW1h21mYU0nSRjzH4ZLuIOD17vdDheGJW89229FPvYrRk9ohHnCM+Xx6wIvdcBaAv0uyQfT3zt6hyPX6OlQ0yn+Jvo9e3DDbLCw/oqaHyVgbq30HALNXAw1O/WA+iZFmQjfWXrP5PPaWe1NYvvkkoPBdIENbjMdHJ2J9ZsfZ7dq3ciBoBo0WnlEDHUbShW3/datVTHD7uKpM4UWKw0tTLjjvhZn9+C86i9UYDsiyXIL7Ojp081QSf9BwswormfO0ZnzchadOfWRDKi7+2F5QPaTww8i/ezJXNEN7o2ab1XDI1Wg4iCxPwangJazXIP2tLwLma66q8E/zu3ttA1/Tyx/DWLqk95n+otHM1bIBR2EOl9X8Gl/yPdYEO697Q/NrH8sCJdVy6hmA0GADGb6Pf3rgFbV+9T9YD9tELoJtAVTgjaFHx1aB7YU1TWPP7BTTXOcrxLEOXRqRJ7+8w4wgb2dzZkqZm7G4lprEC04ksb8pvEdpXrIhKD0hMcBNJ/ldcyRNJia0mvojzgrP3AvukUFS2U2XbuiqleeUHbGLpnxitQLeOWMqAKcmyUYpfRHGCQO2azYV2WFuoGtVxgpC45/GsRIVnfhV0AwdGmpkiPmv5gmBDgw4 jV3TxYgP LW05ZmJ8NpvRRwfeQOWGCxWJ2Fw3tF+Oo8Yxblg1eGYLPW4E060rcSCA2yoSG9koTS4KG7sksUFNywhnFoGHKDm2Q6WQOpkT8YLUt84CZ6DDw1xNVGYsH3Ob9XZ/MUQ87/2dMIWexrw8C+ZGVG15bhdq0+Cb8/xQkV7ezWuBoa/AYs1EM9EPJ/JonG7ue96vF6KcUt+tDSpT1brQ5gEWj0oP0meXxqFK8Quy1ooGULksSoa5NAOoOuwIJncY40UIFAx6o7l0CfJ0byD/OmRD573ubU1HBX1CZlTbQzF0kj6l4hgQ6I3bvAQwRBr0zkXMcWSFHYtL3NDE3RLbbIwP9p6YFYjN6iYU0z65N5xQ1k7ySx1X8o0pRi8VdQ6sHbxpXlkQRA8KYDZQLrcpYKv95ez5EnQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: This allows generic and sw_tags to be set in kernel cmdline too. Signed-off-by: Baoquan He --- include/linux/kasan-enabled.h | 2 ++ mm/kasan/common.c | 21 +++++++++++++++++++++ mm/kasan/hw_tags.c | 18 ------------------ 3 files changed, 23 insertions(+), 18 deletions(-) diff --git a/include/linux/kasan-enabled.h b/include/linux/kasan-enabled.h index 9eca967d8526..b7cb906825ca 100644 --- a/include/linux/kasan-enabled.h +++ b/include/linux/kasan-enabled.h @@ -35,6 +35,8 @@ static inline void kasan_enable(void) {} #endif /* CONFIG_ARCH_DEFER_KASAN || CONFIG_KASAN_HW_TAGS */ #ifdef CONFIG_KASAN_HW_TAGS +extern bool kasan_arg_disabled; + static inline bool kasan_hw_tags_enabled(void) { return kasan_enabled(); diff --git a/mm/kasan/common.c b/mm/kasan/common.c index b7d05c2a6d93..0d788a468e96 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -42,6 +42,27 @@ DEFINE_STATIC_KEY_FALSE(kasan_flag_enabled); EXPORT_SYMBOL_GPL(kasan_flag_enabled); #endif +#ifdef CONFIG_KASAN_HW_TAGS +bool kasan_arg_disabled __ro_after_init; + +/* kasan=off/on */ +static int __init early_kasan_flag(char *arg) +{ + if (!arg) + return -EINVAL; + + if (!strcmp(arg, "off")) + kasan_arg_disabled = true; + else if (!strcmp(arg, "on")) + kasan_arg_disabled = false; + else + return -EINVAL; + + return 0; +} +early_param("kasan", early_kasan_flag); +#endif + struct slab *kasan_addr_to_slab(const void *addr) { if (virt_addr_valid(addr)) diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c index 26a69f0d822c..9602ea4861e2 100644 --- a/mm/kasan/hw_tags.c +++ b/mm/kasan/hw_tags.c @@ -35,7 +35,6 @@ enum kasan_arg_vmalloc { KASAN_ARG_VMALLOC_ON, }; -bool kasan_arg_disabled __ro_after_init; static enum kasan_arg_mode kasan_arg_mode __ro_after_init; static enum kasan_arg_vmalloc kasan_arg_vmalloc __initdata; @@ -75,23 +74,6 @@ unsigned int kasan_page_alloc_sample_order = PAGE_ALLOC_SAMPLE_ORDER_DEFAULT; DEFINE_PER_CPU(long, kasan_page_alloc_skip); -/* kasan=off/on */ -static int __init early_kasan_flag(char *arg) -{ - if (!arg) - return -EINVAL; - - if (!strcmp(arg, "off")) - kasan_arg_disabled = true; - else if (!strcmp(arg, "on")) - kasan_arg_disabled = false; - else - return -EINVAL; - - return 0; -} -early_param("kasan", early_kasan_flag); - /* kasan.mode=sync/async/asymm */ static int __init early_kasan_mode(char *arg) { -- 2.52.0