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Tue, 02 Jun 2026 03:12:30 -0700 (PDT) Date: Tue, 02 Jun 2026 03:12:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a1eac8e.fbc46276.3c3783.0008.GAE@google.com> Subject: [syzbot] [mm?] WARNING in swap_cluster_assert_empty From: syzbot To: akpm@linux-foundation.org, baohua@kernel.org, bhe@redhat.com, chrisl@kernel.org, kasong@tencent.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, nphamcs@gmail.com, shikemeng@huaweicloud.com, syzkaller-bugs@googlegroups.com, youngjun.park@lge.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 1580C4000C X-Rspam-User: X-Stat-Signature: d758q1cadamqzdnzoj8am7k3n1st3x8e X-Rspamd-Server: rspam09 X-HE-Tag: 1780395150-964810 X-HE-Meta: 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 wODEz1BD 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 raO9qbkm 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, syzbot found the following issue on: HEAD commit: 8fde5d1d47f6 Merge tag 'acpi-7.1-rc6' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=118c327a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8118209836970b54 dashboard link: https://syzkaller.appspot.com/bug?extid=deedf22929084640666f compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-8fde5d1d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/529080512bd5/vmlinux-8fde5d1d.xz kernel image: https://storage.googleapis.com/syzbot-assets/39c09b74f46c/bzImage-8fde5d1d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+deedf22929084640666f@syzkaller.appspotmail.com ------------[ cut here ]------------ nr == SWAPFILE_CLUSTER && ci->extend_table WARNING: mm/swapfile.c:471 at swap_cluster_assert_empty+0x2d5/0x320 mm/swapfile.c:471, CPU#3: syz.1.267/6778 Modules linked in: CPU: 3 UID: 0 PID: 6778 Comm: syz.1.267 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:swap_cluster_assert_empty+0x2d5/0x320 mm/swapfile.c:471 Code: 9b ff 49 8d 7d 50 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 46 49 83 7d 50 00 74 a5 e8 4c 09 9b ff 90 <0f> 0b 90 eb 9a e8 41 09 9b ff 90 0f 0b 90 e9 6f ff ff ff 48 89 ef RSP: 0018:ffffc900039d7098 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffffffff826d976c RDX: ffff888037a62540 RSI: ffffffff826d97d4 RDI: ffff8880273450f8 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000200 R10: 0000000000000200 R11: 0000000000000000 R12: 0000000000000200 R13: ffff8880273450a8 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880d6686000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33323ffc CR3: 000000000e596000 CR4: 0000000000352ef0 Call Trace: __free_cluster mm/swapfile.c:585 [inline] free_cluster+0x14b/0x360 mm/swapfile.c:714 __swap_cluster_free_entries+0x73f/0xa30 mm/swapfile.c:1894 swap_put_entries_cluster+0x473/0x5b0 mm/swapfile.c:1584 swap_put_entries_direct+0x123/0x1b0 mm/swapfile.c:2072 shmem_free_swap+0x1f4/0x200 mm/shmem.c:985 shmem_undo_range+0x3fd/0x1570 mm/shmem.c:1139 shmem_truncate_range mm/shmem.c:1277 [inline] shmem_evict_inode+0x3f3/0xc40 mm/shmem.c:1407 evict+0x3c2/0xad0 fs/inode.c:841 iput_final fs/inode.c:1960 [inline] iput.part.0+0x605/0xf50 fs/inode.c:2009 iput+0x35/0x40 fs/inode.c:1975 dentry_unlink_inode+0x2c0/0x4c0 fs/dcache.c:476 __dentry_kill+0x1d0/0x690 fs/dcache.c:718 finish_dput+0x76/0x480 fs/dcache.c:927 dput.part.0+0x456/0x570 fs/dcache.c:976 dput+0x1f/0x30 fs/dcache.c:968 __fput+0x519/0xb50 fs/file_table.c:518 task_work_run+0x150/0x240 kernel/task_work.c:233 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x951/0x2af0 kernel/exit.c:976 do_group_exit+0xd5/0x2a0 kernel/exit.c:1119 get_signal+0x20ff/0x2210 kernel/signal.c:3037 arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop kernel/entry/common.c:98 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline] irqentry_exit+0x39e/0x970 kernel/entry/common.c:162 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7f3317d9ce61 Code: Unable to access opcode bytes at 0x7f3317d9ce37. RSP: 002b:0000000000000030 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f3318015fa0 RCX: 00007f3317d9ce59 RDX: 0000000000000000 RSI: 0000000000000030 RDI: 0000000000000011 RBP: 00007f3317e32d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007f3318016038 R14: 00007f3318015fa0 R15: 00007ffc650798c8 --- 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