From: syzbot <syzbot+d1974fc28545a3e6218b@syzkaller.appspotmail.com>
To: catalin.marinas@arm.com, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com,
will@kernel.org
Subject: [syzbot] [arm?] WARNING in copy_highpage
Date: Wed, 01 Oct 2025 14:48:30 -0700 [thread overview]
Message-ID: <68dda1ae.a00a0220.102ee.0065.GAE@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: fec734e8d564 Merge tag 'riscv-for-linus-v6.17-rc8' of git:..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12187d34580000
kernel config: https://syzkaller.appspot.com/x/.config?x=13bd892ec3b155a2
dashboard link: https://syzkaller.appspot.com/bug?extid=d1974fc28545a3e6218b
compiler: aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/fa3fbcfdac58/non_bootable_disk-fec734e8.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d7e18b408aea/vmlinux-fec734e8.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9b7984f47117/Image-fec734e8.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d1974fc28545a3e6218b@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 1 PID: 25189 at arch/arm64/mm/copypage.c:55 try_page_mte_tagging arch/arm64/include/asm/mte.h:93 [inline]
WARNING: CPU: 1 PID: 25189 at arch/arm64/mm/copypage.c:55 copy_highpage+0x150/0x334 arch/arm64/mm/copypage.c:55
Modules linked in:
CPU: 1 UID: 0 PID: 25189 Comm: syz.2.7336 Not tainted syzkaller #0 PREEMPT
Hardware name: linux,dummy-virt (DT)
pstate: 00402009 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : copy_highpage+0x150/0x334 arch/arm64/mm/copypage.c:55
lr : copy_highpage+0xb4/0x334 arch/arm64/mm/copypage.c:25
sp : ffff800088053940
x29: ffff800088053940 x28: ffffc1ffc0acf800 x27: ffff800088053b10
x26: ffffc1ffc0acf808 x25: ffffc1ffc037b1c0 x24: ffffc1ffc037b1c0
x23: ffffc1ffc0acf800 x22: ffffc1ffc0acf800 x21: fff000002b3e0000
x20: fff000000dec7000 x19: ffffc1ffc037b1c0 x18: 0000000000000000
x17: fff07ffffcffa000 x16: ffff800080008000 x15: 0000000000000001
x14: 0000000000000000 x13: 0000000000000003 x12: 000000000006d9ad
x11: 0000000000000000 x10: 0000000000000010 x9 : 0000000000000000
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff800088053b18 x4 : ffff80008032df94 x3 : 00000000ff000000
x2 : 01ffc00003000001 x1 : 01ffc00003000001 x0 : 01ffc00003000001
Call trace:
try_page_mte_tagging arch/arm64/include/asm/mte.h:93 [inline] (P)
copy_highpage+0x150/0x334 arch/arm64/mm/copypage.c:55 (P)
copy_mc_highpage include/linux/highmem.h:383 [inline]
folio_mc_copy+0x44/0x6c mm/util.c:740
__migrate_folio.constprop.0+0xc4/0x23c mm/migrate.c:851
migrate_folio+0x1c/0x2c mm/migrate.c:882
move_to_new_folio+0x58/0x144 mm/migrate.c:1097
migrate_folio_move mm/migrate.c:1370 [inline]
migrate_folios_move mm/migrate.c:1719 [inline]
migrate_pages_batch+0xaf4/0x1024 mm/migrate.c:1966
migrate_pages_sync mm/migrate.c:2023 [inline]
migrate_pages+0xb9c/0xcdc mm/migrate.c:2105
do_mbind+0x20c/0x4a4 mm/mempolicy.c:1539
kernel_mbind mm/mempolicy.c:1682 [inline]
__do_sys_mbind mm/mempolicy.c:1756 [inline]
__se_sys_mbind mm/mempolicy.c:1752 [inline]
__arm64_sys_mbind+0xd0/0xd8 mm/mempolicy.c:1752
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x48/0x110 arch/arm64/kernel/syscall.c:49
el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:132
do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:151
el0_svc+0x34/0x10c arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x1a4/0x1a8 arch/arm64/kernel/entry.S:596
---[ end trace 0000000000000000 ]---
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
next reply other threads:[~2025-10-01 21:48 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-01 21:48 syzbot [this message]
2025-10-03 17:05 ` [syzbot] [arm?] WARNING in copy_highpage Catalin Marinas
2025-10-06 7:55 ` David Hildenbrand
2025-10-06 9:38 ` David Hildenbrand
2025-10-06 13:17 ` Catalin Marinas
2025-10-06 13:25 ` David Hildenbrand
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=68dda1ae.a00a0220.102ee.0065.GAE@google.com \
--to=syzbot+d1974fc28545a3e6218b@syzkaller.appspotmail.com \
--cc=catalin.marinas@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.