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Sat, 01 Mar 2025 14:41:20 -0800 (PST) Date: Sat, 01 Mar 2025 14:41:20 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67c38d10.050a0220.dc10f.016d.GAE@google.com> Subject: [syzbot] [mm?] kernel BUG in try_to_unmap_one From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: uwdamupura94m59fnrqmf111ykj5as9g X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 67EA7A0009 X-Rspam-User: X-HE-Tag: 1740868881-985748 X-HE-Meta: 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 SKKmto+I 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 +BGfh/c8 916SneBCQUfn1fcteZgdf5tTE4Z+siZo6SCpAMvwsQRVMJxEl239YQUtEOMP/6HFjUFbJfSkMMdVhJe3OTZ2P2lgrN0dFWKwaaCpHegjU238TxiPrZ1hyoEdTaRcdPa7UgWaDU3ufmZ6XFc9QHuNEZDODSE2QQJkZK09KQ4QOhhxHzCOMlixV3We0nXEE5txNeusCSHCUBv7ta4kkneZpcunHIoOkwcWA8ssmvPUn6dWIIG/66yA0oD0yKlt5IaS/5OzEm3p7IHk1l6FpsBFhWbhPZBlshF96S3V4rUMlJLdDgfE5Jv4+LtiRfh7yEDGgHQC6aHin0XqGmFXkPAySErMiJIyXHFbZR8aGchbqwQnbaPW5AKP5XCXoddADvwrR0FWKlyIRbWVLcG8CeFQ4q0IMg9GrmG6 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: List-Subscribe: List-Unsubscribe: Hello, syzbot found the following issue on: HEAD commit: e5d3fd687aac Add linux-next specific files for 20250218 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12faf7f8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4e945b2fe8e5992f dashboard link: https://syzkaller.appspot.com/bug?extid=fb86166504f57eff29d7 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ef079ccd2725/disk-e5d3fd68.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/99f2123d6831/vmlinux-e5d3fd68.xz kernel image: https://storage.googleapis.com/syzbot-assets/eadfc9520358/bzImage-e5d3fd68.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fb86166504f57eff29d7@syzkaller.appspotmail.com evict+0x4e8/0x9a0 fs/inode.c:806 __dentry_kill+0x20d/0x630 fs/dcache.c:660 dput+0x19f/0x2b0 fs/dcache.c:902 __fput+0x60b/0x9f0 fs/file_table.c:472 task_work_run+0x24f/0x310 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f ------------[ cut here ]------------ kernel BUG at mm/rmap.c:1858! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 UID: 0 PID: 6053 Comm: syz.4.27 Not tainted 6.14.0-rc3-next-20250218-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:try_to_unmap_one+0x3d0d/0x3fa0 mm/rmap.c:1858 Code: c7 c7 80 93 c3 8e 48 89 da e8 ef f3 19 03 e9 68 ca ff ff e8 b5 12 ab ff 48 8b 7c 24 20 48 c7 c6 80 17 36 8c e8 94 d2 f5 ff 90 <0f> 0b e8 9c 12 ab ff 48 8b 7c 24 18 48 c7 c6 40 1c 36 8c e8 7b d2 RSP: 0018:ffffc9000b1be9c0 EFLAGS: 00010246 RAX: 367eb4645686ad00 RBX: 00000000f4000000 RCX: ffffc9000b1be503 RDX: 0000000000000004 RSI: ffffffff8c2aaf60 RDI: ffffffff8c8156e0 RBP: ffffc9000b1bedf0 R08: ffffffff903da477 R09: 1ffffffff207b48e R10: dffffc0000000000 R11: fffffbfff207b48f R12: 8000000053c008e7 R13: dffffc0000000000 R14: ffffea00014f0000 R15: ffffea00014f0030 FS: 00007f4d2783e6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c465fa1 CR3: 000000002a1f6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __rmap_walk_file+0x420/0x5f0 mm/rmap.c:2774 try_to_unmap+0x219/0x2e0 unmap_folio+0x183/0x1f0 mm/huge_memory.c:3053 __folio_split+0x849/0x16d0 mm/huge_memory.c:3696 truncate_inode_partial_folio+0x9b1/0xdc0 mm/truncate.c:234 shmem_undo_range+0x82f/0x1820 mm/shmem.c:1143 shmem_truncate_range mm/shmem.c:1237 [inline] shmem_fallocate+0x431/0xf20 mm/shmem.c:3663 vfs_fallocate+0x623/0x7a0 fs/open.c:338 madvise_remove mm/madvise.c:1034 [inline] madvise_vma_behavior mm/madvise.c:1263 [inline] madvise_walk_vmas mm/madvise.c:1505 [inline] madvise_do_behavior+0x1ec6/0x3b90 mm/madvise.c:1657 do_madvise mm/madvise.c:1755 [inline] __do_sys_madvise mm/madvise.c:1763 [inline] __se_sys_madvise mm/madvise.c:1761 [inline] __x64_sys_madvise+0x11b/0x140 mm/madvise.c:1761 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 RIP: 0033:0x7f4d2698d169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4d2783e038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007f4d26ba5fa0 RCX: 00007f4d2698d169 RDX: 0000000000000009 RSI: 0000000000040000 RDI: 00004000001c1000 RBP: 00007f4d26a0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4d26ba5fa0 R15: 00007ffda9fdc678 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:try_to_unmap_one+0x3d0d/0x3fa0 mm/rmap.c:1858 Code: c7 c7 80 93 c3 8e 48 89 da e8 ef f3 19 03 e9 68 ca ff ff e8 b5 12 ab ff 48 8b 7c 24 20 48 c7 c6 80 17 36 8c e8 94 d2 f5 ff 90 <0f> 0b e8 9c 12 ab ff 48 8b 7c 24 18 48 c7 c6 40 1c 36 8c e8 7b d2 RSP: 0018:ffffc9000b1be9c0 EFLAGS: 00010246 RAX: 367eb4645686ad00 RBX: 00000000f4000000 RCX: ffffc9000b1be503 RDX: 0000000000000004 RSI: ffffffff8c2aaf60 RDI: ffffffff8c8156e0 RBP: ffffc9000b1bedf0 R08: ffffffff903da477 R09: 1ffffffff207b48e R10: dffffc0000000000 R11: fffffbfff207b48f R12: 8000000053c008e7 R13: dffffc0000000000 R14: ffffea00014f0000 R15: ffffea00014f0030 FS: 00007f4d2783e6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c465fa1 CR3: 000000002a1f6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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