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h=Date:From:To:Cc:Subject:References:In-Reply-To; b=LUPT9KJF2Gly/lJageiBR5OS+ZsSCltsXDAWTqNgnjDvRXpNw6VROiYW4xMsf4Nfz zlkPMmkEKXvzpCSeT1Q+Vt2z26rP+5AsqV987kmlh26TsPaoDh/qcDDjaeS2mApyVf LlWnRQ4otUasQ16KJiDnuYX+4unwZ/hLpQ97mdkbBi9PPEp3FxHBiB2IQxlNcnfImk thAwEMXBVmmxLWhu5elHFtcI2QfxWCc4bmlDjgVhYTuUhS+Ynpadpw2L1JxhJbnZ5t +P4ZjjljRfEkBaN7YtDyw6RImW1RLetIFeAtm/p9NYItFEJlCTWDVjeLVSeixgY1+F sNHm3kh/McQgg== Date: Thu, 11 Jun 2026 14:01:34 +0200 From: "Oscar Salvador (SUSE)" To: syzbot ci Cc: akpm@linux-foundation.org, david@kernel.org, david@redhat.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, mhocko@suse.com, muchun.song@linux.dev, osalvador@suse.de, vbabka@kernel.org, syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot ci] Re: Implement a new generic pagewalk API Message-ID: References: <20260525165528.184397-1-osalvador@suse.de> <6a153468.050a0220.7dd1.0004.GAE@google.com> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="OMyYprDkbMQMsjSv" Content-Disposition: inline In-Reply-To: <6a153468.050a0220.7dd1.0004.GAE@google.com> X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: D5A6B8001F X-Rspam-User: X-Stat-Signature: d66jaw75prokcxt1ghw4ntw4qpka6n7y X-HE-Tag: 1781179301-670887 X-HE-Meta: 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 Ils0nGzk 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: --OMyYprDkbMQMsjSv Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, May 25, 2026 at 10:49:28PM -0700, syzbot ci wrote: > syzbot ci has tested the following series > > [v3] Implement a new generic pagewalk API > https://lore.kernel.org/all/20260525165528.184397-1-osalvador@suse.de > * [RFC PATCH v3 1/8] mm: Add softleaf_from_pud > * [RFC PATCH v3 2/8] mm: Add {pmd,pud}_huge_lock helper > * [RFC PATCH v3 3/8] mm: Implement folio_pmd_batch > * [RFC PATCH v3 4/8] mm: Implement pt_range_walk > * [RFC PATCH v3 5/8] mm: Make /proc/pid/smaps use the new generic pagewalk API > * [RFC PATCH v3 6/8] mm: Make /proc/pid/numa_maps use the new generic pagewalk API > * [RFC PATCH v3 7/8] mm: Make /proc/pid/pagemap use the new generic pagewalk API > * [RFC PATCH v3 8/8] mm: Make /proc/pid/clear_refs use the new generic pagewalk API > > and found the following issue: > general protection fault in clear_refs_write > > Full report is available here: > https://ci.syzbot.org/series/0beab2d0-9d88-4288-ac81-b294e51c057d #syz test -- Oscar Salvador SUSE Labs --OMyYprDkbMQMsjSv Content-Type: text/x-patch; charset=us-ascii Content-Disposition: attachment; filename=0001-fix.patch >From 252fd5679cc74ebe82d01d5bf1523184f7e323be Mon Sep 17 00:00:00 2001 From: Oscar Salvador Date: Thu, 11 Jun 2026 13:58:44 +0200 Subject: [PATCH] fix --- fs/proc/task_mmu.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 1134dfb3dab0..87515949b09d 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -1710,6 +1710,7 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf, else if (ret < 0) break; + flags &= ~PT_TYPE_NONE pt_type = pt_range_walk_start(&ptw, vma, vma->vm_start, vma->vm_end, flags); while (pt_type != PTW_DONE) { -- 2.35.3 --OMyYprDkbMQMsjSv--