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Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: References: To: Matthew Wilcox Cc: dhowells@redhat.com, Yikebaer Aizezi , akpm@linux-foundation.org, linux-mm@kvack.org, Herbert Xu Subject: Re: WARNING in try_grab_page MIME-Version: 1.0 Date: Fri, 04 Aug 2023 14:35:06 +0100 Message-ID: <2574965.1691156106@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="us-ascii" Content-ID: <2574964.1691156106.1@warthog.procyon.org.uk> X-Rspamd-Queue-Id: 2AEAD40028 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: soxrawtn4d4197dbpe7xssygryygysyp X-HE-Tag: 1691156111-114871 X-HE-Meta: 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 82QW5Dan /LwHBmmmKgdvolVIivj9eY2Rjl2OOJMzaoNdl9ZDJaxUUlDhiolDRpQexbqiAym2y0zSTkHt8W7E1uwImjWLOFpIEpGhUzSjpNuN61cvOUDdfJesoXFxbsmMzBwoeouHjUtL1l74rtMq6zgrq+5iuHJsx/I1xiHTXAYNSQZGVQSOrcM19BKa7rva3+UPTLPcK3HG5Y5hkTuhBJqwm5KfbAvS5BX+5A0+oBuLAyjk/TuI5POwyU2WdnXcFkwPmynK3hephFztDOpg7Sx8Sza1P0RNPNm5LBw2oztZT1lL1fhVxmG9vHZgXqPVswYVFdTELTJJsowazrm4OulOzd4CS53fnN5/hoITEIqgGh8O3inCXSI1rdQOmca1BHXxvO/LeLF/8y+BfrB2f6jqDleNcKQkIWEXBfsaTq/+p4yJ4CNP7nZ2Fi3yuqz8UIA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Matthew Wilcox wrote: > On Fri, Aug 04, 2023 at 11:14:45AM +0800, Yikebaer Aizezi wrote: > > Just patched it, then I rerun the reproduce program, and I got this > > output from console: > > > > BUG: Bad page state in process POC pfn:0eb8d > > page:ffffea00003ae340 refcount:0 mapcount:0 mapping:0000000000000000 > > index:0x0 pfn:0xeb8d > > flags: 0xfff00000001000(reserved|node=0|zone=1|lastcpupid=0x7ff) > > page_type: 0xffffffff() > > raw: 00fff00000001000 ffffea00003ae348 ffffea00003ae348 0000000000000000 > > raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 > > page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set > > page_owner info is not present (never set?) > > Modules linked in: > > CPU: 0 PID: 7959 Comm: POC Not tainted 6.5.0-rc2 #2 > > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > > rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 > > Call Trace: > > > > __dump_stack lib/dump_stack.c:88 [inline] > > dump_stack_lvl+0xd4/0xf0 lib/dump_stack.c:106 > > bad_page+0x71/0x1a0 mm/page_alloc.c:533 > > free_page_is_bad_report mm/page_alloc.c:974 [inline] > > free_page_is_bad mm/page_alloc.c:984 [inline] > > free_pages_prepare mm/page_alloc.c:1153 [inline] > > free_unref_page_prepare+0x5f3/0xb50 mm/page_alloc.c:2348 > > free_unref_page+0x2f/0x3c0 mm/page_alloc.c:2443 > > __folio_put_small mm/swap.c:106 [inline] > > __folio_put+0xa2/0x110 mm/swap.c:129 > > folio_put include/linux/mm.h:1423 [inline] > > put_page include/linux/mm.h:1492 [inline] > > extract_user_to_sg lib/scatterlist.c:1151 [inline] > > Ohh. I think this is something Dave Howells has a patch for. > > > extract_iter_to_sg lib/scatterlist.c:1349 [inline] > > extract_iter_to_sg+0x11ec/0x1570 lib/scatterlist.c:1339 > > hash_sendmsg+0x487/0xf50 crypto/algif_hash.c:119 > > sock_sendmsg_nosec net/socket.c:725 [inline] > > sock_sendmsg+0xcf/0x170 net/socket.c:748 > > ____sys_sendmsg+0x676/0x860 net/socket.c:2494 > > ___sys_sendmsg+0x109/0x1a0 net/socket.c:2548 > > __sys_sendmsg+0xe4/0x1b0 net/socket.c:2577 > > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > > do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 > > entry_SYSCALL_64_after_hwframe+0x63/0xcd This might be the fix you're looking for. https://lore.kernel.org/linux-crypto/20571.1690369076@warthog.procyon.org.uk/ Andrew has it in mm-hotfixes-unstable. David