From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5D0DE219301; Mon, 23 Jun 2025 22:48:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750718899; cv=none; b=HWLblul3hzAlNT7iheg7aQTFrmm3IAti+/xOLCRUA0L4JwKXdWFBjudTVJHL6APCAXl2UJYxZKv84ufEue0fv+MYiP9rwmtKmzNvaeF7lxDFN8yYybKleFaJx5c7ApOeEZUVkgYPUM2X/cPJZ1UKCsvRGaSup6Asa6Kq2Abztuk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750718899; c=relaxed/simple; bh=XI2BST/F+2NR+LRpGUB+PmBuAIA+krq5mB/OjzIYOeA=; h=Date:To:From:Subject:Message-Id; b=oW47jJK0oOM71YVESSSKxOXHw66nEiOBNUz8F5cQm0zVvdss+DRcUyy7Q/dqqUjUPFJXYtmyYxNlu9NmO1zJDvbUQjx7sAuM7WmVha2bdWms3ZeWptpYsd1TjJkEQxeLPqZ4KvIr54zTbn4WIx2HExIyQthB+c2RgsFEj4lzTTs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=TZIvIZ1P; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="TZIvIZ1P" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 20834C4CEEA; Mon, 23 Jun 2025 22:48:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1750718899; bh=XI2BST/F+2NR+LRpGUB+PmBuAIA+krq5mB/OjzIYOeA=; h=Date:To:From:Subject:From; b=TZIvIZ1PA+NHbz5303UNgBKyj0Cgv5NJcpvdSgaKEeUUo++V62pVOrTLitpMxEpU8 vSB1shSk2ECoU04qT94INUmjFd8GW3tQ6xInQjXXwtp0Hk+GKnPDhhheYJNLr4/xWk qhsymbYDYZC/OmJKJpIIqeJ6jUqvd/5M8HLU/YFI= Date: Mon, 23 Jun 2025 15:48:18 -0700 To: mm-commits@vger.kernel.org,stable@vger.kernel.org,ryan.roberts@arm.com,lkp@intel.com,dan.carpenter@linaro.org,agordeev@linux.ibm.com,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-vmalloc-leave-lazy-mmu-mode-on-pte-mapping-error.patch added to mm-hotfixes-unstable branch Message-Id: <20250623224819.20834C4CEEA@smtp.kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/vmalloc: leave lazy MMU mode on PTE mapping error has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-vmalloc-leave-lazy-mmu-mode-on-pte-mapping-error.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmalloc-leave-lazy-mmu-mode-on-pte-mapping-error.patch This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Alexander Gordeev Subject: mm/vmalloc: leave lazy MMU mode on PTE mapping error Date: Mon, 23 Jun 2025 09:57:21 +0200 vmap_pages_pte_range() enters the lazy MMU mode, but fails to leave it in case an error is encountered. Link: https://lkml.kernel.org/r/20250623075721.2817094-1-agordeev@linux.ibm.com Fixes: 2ba3e6947aed ("mm/vmalloc: track which page-table levels were modified") Signed-off-by: Alexander Gordeev Reported-by: kernel test robot Reported-by: Dan Carpenter Closes: https://lore.kernel.org/r/202506132017.T1l1l6ME-lkp@intel.com/ Reviewed-by: Ryan Roberts Cc: Signed-off-by: Andrew Morton --- mm/vmalloc.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) --- a/mm/vmalloc.c~mm-vmalloc-leave-lazy-mmu-mode-on-pte-mapping-error +++ a/mm/vmalloc.c @@ -514,6 +514,7 @@ static int vmap_pages_pte_range(pmd_t *p unsigned long end, pgprot_t prot, struct page **pages, int *nr, pgtbl_mod_mask *mask) { + int err = 0; pte_t *pte; /* @@ -530,12 +531,18 @@ static int vmap_pages_pte_range(pmd_t *p do { struct page *page = pages[*nr]; - if (WARN_ON(!pte_none(ptep_get(pte)))) - return -EBUSY; - if (WARN_ON(!page)) - return -ENOMEM; - if (WARN_ON(!pfn_valid(page_to_pfn(page)))) - return -EINVAL; + if (WARN_ON(!pte_none(ptep_get(pte)))) { + err = -EBUSY; + break; + } + if (WARN_ON(!page)) { + err = -ENOMEM; + break; + } + if (WARN_ON(!pfn_valid(page_to_pfn(page)))) { + err = -EINVAL; + break; + } set_pte_at(&init_mm, addr, pte, mk_pte(page, prot)); (*nr)++; @@ -543,7 +550,8 @@ static int vmap_pages_pte_range(pmd_t *p arch_leave_lazy_mmu_mode(); *mask |= PGTBL_PTE_MODIFIED; - return 0; + + return err; } static int vmap_pages_pmd_range(pud_t *pud, unsigned long addr, _ Patches currently in -mm which might be from agordeev@linux.ibm.com are mm-vmalloc-leave-lazy-mmu-mode-on-pte-mapping-error.patch