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Sat, 29 Aug 2026 10:52:26 -0700 (PDT) Date: Sat, 29 Aug 2026 10:52:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a931c5a.08e933ee.dbf97.0093.GAE@google.com> Subject: [syzbot] [mm?] WARNING in __mod_zone_page_state From: syzbot To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 818bebeb63dd drm/xe: Don't hand out the flat CCS storage a.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=10286d79580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ccca94d2c01b9e78 dashboard link: https://syzkaller.appspot.com/bug?extid=cd2073ee6d958a8d0fcd compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13cf7625580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cd2073ee6d958a8d0fcd@syzkaller.appspotmail.com smpboot: CPU 1 is now offline ------------[ cut here ]------------ IS_ENABLED(CONFIG_PREEMPT_COUNT) && __lockdep_enabled && (preempt_count() == 0 && this_cpu_read(hardirqs_enabled)) WARNING: mm/vmstat.c:361 at __mod_zone_page_state+0x96/0x190 mm/vmstat.c:361, CPU#2: syz-executor412/6040 Modules linked in: CPU: 2 UID: 0 PID: 6040 Comm: syz-executor412 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:__mod_zone_page_state+0x96/0x190 mm/vmstat.c:361 Code: d0 00 00 00 8b 05 3e 44 ea 0e 85 c0 74 1f 65 8b 05 87 e0 2e 12 65 0b 05 d0 99 2e 12 75 0f 65 8b 05 d3 db 2e 12 85 c0 74 04 90 <0f> 0b 90 48 c7 c7 c0 e7 ff 8b e8 3b b3 6d 09 65 48 0f be 5d 00 48 RSP: 0018:ffffc9000627f8e0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 1ffffffff2287150 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88807ffd79b8 RBP: ffffffff9489f448 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffffffffffff R13: 0000000000000008 R14: ffff88807ffd7940 R15: ffffffff9489f440 FS: 00005555785ce400(0000) GS:ffff8880d5da2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005608d531ffb8 CR3: 000000002cb7c000 CR4: 0000000000352ef0 Call Trace: __zone_stat_mod_folio include/linux/vmstat.h:410 [inline] __munlock_folio mm/mlock.c:144 [inline] mlock_folio_batch+0xf97/0x36e0 mm/mlock.c:204 mlock_drain_remote+0xe5/0x140 mm/mlock.c:230 page_alloc_cpu_dead+0x16/0x130 mm/page_alloc.c:6468 cpuhp_invoke_callback+0x3b4/0x9a0 kernel/cpu.c:194 __cpuhp_invoke_callback_range+0x158/0x1d0 kernel/cpu.c:972 cpuhp_invoke_callback_range kernel/cpu.c:996 [inline] cpuhp_down_callbacks kernel/cpu.c:1386 [inline] _cpu_down+0x523/0x1020 kernel/cpu.c:1457 cpu_down_maps_locked kernel/cpu.c:1483 [inline] cpu_down kernel/cpu.c:1491 [inline] cpu_device_down+0x82/0xc0 kernel/cpu.c:1508 device_offline drivers/base/core.c:4283 [inline] device_offline+0x2f4/0x400 drivers/base/core.c:4267 online_store+0xd1/0x180 drivers/base/core.c:2883 dev_attr_store+0x58/0x80 drivers/base/core.c:2509 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6af/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f90996d005e Code: 08 0f 85 f5 e2 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 90 41 57 41 56 4d 89 c6 41 55 4d 89 cd 41 54 55 53 48 83 ec 08 RSP: 002b:00007ffd7eb94578 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00005555785ce400 RCX: 00007f90996d005e RDX: 0000000000000002 RSI: 00007f90997150ff RDI: 0000000000000003 RBP: 00007f90997175e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9099717578 R13: 00007f909971509a R14: 00007f90997150b9 R15: 0000000000000002 --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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