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b=dM73evRgIH6Tc0t4MT6FmSArUfNHA6XbB0+n3hG2uul6GVQNExDXuAKD+omFLkxXq L9yih0T0Hr7pZ6W1rmjbx8is8+cgZ61chG+VdVg1KTOp4YrRQh+moiwslzeXmYib96 QmwT2TabtDoEDkyjB4FOFb3PiWf8GGJsnyfiIPQ3HBvqYA/GJ/4oICjbiHK4Y6IvP0 ByTLMlnoDUfkNRVHy70E/eju975PEOPc9zScG1x5FK/WI+wSaDk+lPtN16CeXoWvY/ M7AgL7l2wUwgkuIvRl11zk630XGtsTT65nVCKpr81I4+fChK9tUw6vPaRXBYRlJxni 8Joe3Q7i68zJA== Date: Thu, 11 Jun 2026 15:52:16 +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="HNkqtG5OHNgJiC2N" Content-Disposition: inline In-Reply-To: <6a153468.050a0220.7dd1.0004.GAE@google.com> X-Rspamd-Server: rspam10 X-Rspam-User: X-Stat-Signature: 3ueoyiy3pg9sz11tenetc6bwx4kj3ayo X-Rspamd-Queue-Id: 6BFF514000F X-HE-Tag: 1781185945-301816 X-HE-Meta: U2FsdGVkX18od5Ql7BxaDbkNp0BlGLCWO2EyvxE/hGFIgrea2EoeJfPAfLNMKedZZlixhLjGtGHFu8ab61lGJU6kdT+82/PbodNlN9Pa21GbJFXaHulXL/CmQqj9vCNCQSYJjow5b0NtEhwBRcNb6V3cBHRkKes6/KXU0WV9MWCROdbpEqcxAw4fRiZ4TFlkKEBuj1vG8g2K4kN5cpw5ithTuuEy75EAwtmOA0CUUD3MoC798EzCs3l+oWMlMhe4U1UP3f6wcKmaaCGDTDdUUY6Yy6yb9Kjq5BELskaT4H4wRkcteHmT75LvtfDrpMEN0I7dhJxS74XtEFKpwQnqP4Me4lokjNDhVUDduSZVEWHMbs25MNQ3ZtjLNJpqVqX+6/5rAt3ftmpoR3VqCZUwfJGY5FPHHbBsio/gYjxWkifzySBemlzZWIPLxWaf3TAmNniTHh9BH2x6xMbz23NdvfkbE984B8R5J8oIJcaRD6pQqlwXsJOXdCGoD+KJAlA6yB9C6djX4tyzkXwxIHjVSpDHLoKaNieprhXBr4l0uYp2IuULz7GDnAjJlhOVleNNayOq688wN9ye365FqL7VyN+cV/na+l+BA3vXoGBM28vCsUpcvwmrw7IUHj94J8EQnbeHINmp5L1QSQZ5pTAWn65HIEeTie185z3HDspi6nA0ideFRY9Vqurzz5ub4ge4eOEdJ5nbOfrPUAoHK9K8nj5pvpyaSwhxrqSuJo+EH9yfmHLMJHyynxIqlkF9TKjIvYsfOc0q7X1Bwda913xZwLfGbIryWw6TwcFgH2kKlj2HOtCSKDahUXiGaQ3w1MFaZCFwL8hpEuW81G5k/H0+iTH9FiFOuWWN2tsy2iwAf2qA+u2SwCQdIyy+vrrRp9khHuq+za1t+Igt7l1GPBXDtRFIkdHK05DEoYfcdwwAnXYtjB4MZgsTWm8fg7Uc5MtkwBeMFl7X7jy6Ht1MGzU JIy0io53 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: --HNkqtG5OHNgJiC2N 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 --HNkqtG5OHNgJiC2N Content-Type: text/x-patch; charset=us-ascii Content-Disposition: attachment; filename=0001-fix.patch >From 59776435d1beca2bd9446050450afe04453a99e8 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..fadc6356f84e 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 --HNkqtG5OHNgJiC2N--