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b=2MCxWJVLaV4p9IUJ3yEQKhjBd+GDc+KxqDvDeyLYngyo97242qa6hNuQFycP/1qoG +zjH3FrCKNXaBPmM93H4M4N4qBjEW4kgUhP7joC/iWwQW9pk/TwWSEbIqDYonKMlZ6 vYGlWstDDrAhGpxdTDiPagwHQBLFZHYDp4FGz/9k= Date: Tue, 11 Jun 2024 10:30:05 -0700 From: Andrew Morton To: syzbot Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, muchun.song@linux.dev, syzkaller-bugs@googlegroups.com, Vivek Kasireddy Subject: Re: [syzbot] [mm?] general protection fault in dequeue_hugetlb_folio_nodemask (2) Message-Id: <20240611103005.ae4170608bd15d63adee2492@linux-foundation.org> In-Reply-To: <0000000000004f12bb061a9acf07@google.com> References: <0000000000004f12bb061a9acf07@google.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 1601A40002 X-Rspamd-Server: rspam10 X-Rspam-User: X-Stat-Signature: qwe91d6ng9w35pbbjoaige6jxy3br3fc X-HE-Tag: 1718127007-131339 X-HE-Meta: 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 JRektJ9s habMW+fB8nklSD2ToZ6JWokWrc69vhfdZzmn48vrCIy+i3lPJx3u8YzzYUKjVwG1oMEoCmMbc3MQ64p+m09+lQSsrpY427WizUF9pTteQOjCfHQnCms37bSfalF7lwxZybgcNE+DzKq7bUd6/inwx1ZsiNiwhknlH9KahLVjkYtFYWveBrq2UBPD+dbpHGylroYX9ZqfftfTZS5BBPqrBm9Tv4WQlM8BzLND6O8upkwGDL+zCrhR3bvUNifv4EFH6qUoV1eZ4lWqmyxIGtKd5GUIK57+JCtJUKUhH7kU+ptFfK23Om/KEkp6eNieGya8Q2x0wzt6rLwVz6JfTvui+B5QIUvFHdudrZuP1DuBXaaNiOA2DujFM7adF8FPNv3Y1AVFgrzNHL1MFr0gzCelFs4IDRHsykJK1roVvSSS8ZC5u/Ay2IOnT9CIC/V+esqm96uFAl00o8xy8dkpFk37RpH4kGsvBhSWFCZ1P X-Bogosity: Ham, tests=bogofilter, spamicity=0.000003, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, 11 Jun 2024 03:34:25 -0700 syzbot wrote: > Hello, > > syzbot found the following issue on: Thanks. > Call Trace: > > alloc_hugetlb_folio_nodemask+0xae/0x3f0 mm/hugetlb.c:2603 > memfd_alloc_folio+0x15e/0x390 mm/memfd.c:75 > memfd_pin_folios+0x1066/0x1720 mm/gup.c:3864 > udmabuf_create+0x658/0x11c0 drivers/dma-buf/udmabuf.c:353 > udmabuf_ioctl_create drivers/dma-buf/udmabuf.c:420 [inline] > udmabuf_ioctl+0x304/0x4f0 drivers/dma-buf/udmabuf.c:451 > vfs_ioctl fs/ioctl.c:51 [inline] > __do_sys_ioctl fs/ioctl.c:907 [inline] > __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f I think we can pretty confidently point at the series "mm/gup: Introduce memfd_pin_folios() for pinning memfd folios". I'll drop the v14 series.