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Thu, 27 Feb 2025 23:26:36 -0800 (PST) Date: Thu, 27 Feb 2025 23:26:36 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67c1652c.050a0220.1baf.000d.GAE@google.com> Subject: [syzbot] [mm?] kernel BUG in filemap_fault 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-Rspam-User: X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 35B161C000C X-Stat-Signature: 7ajbbwm6gw1bt49yq3fn61kgwemojzuu X-HE-Tag: 1740727597-403244 X-HE-Meta: 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 CcQwYb0a 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 ynLOfZrt i/5UG157gqULJiyzfhNXmW6q2n/eze13SuXTau0LJzDnEOi/+O1+e3Y0rE+Y4OwZtoWyjH+VS8ME2A9esRX9b1u07lgr/aYRofQ3JnVl/CCn/GQVYBKUSacWBxNG7pdrNq9D/2WEQtl83oUFSdMpu+NOykrJVZLmK1OGkC7jMbON0vcdMbKgIIRhQUrp0di2xKMN7wp29lQo1evKlu99yniPj3Fx7WF0Su+ED+nhtP+SkPBf8dfykkg3kVHGx3UJvNVkbFRswbSY+mmMQKjkwutmLwqlWn+PPuSP0npOlppu/eNvrxJsBHfA7FBFrnxhp1eNnyt1R1C2CO6tRhakD/ETg4JyueedT7s6X3rXd8GYOSIv8ylkoCOL5G10u6s0Bk6lKWjV3yS4EGj9I2ZjksC3oLaV/QIP 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=156586e4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4e945b2fe8e5992f dashboard link: https://syzkaller.appspot.com/bug?extid=f37372d86207b3bb2941 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+f37372d86207b3bb2941@syzkaller.appspotmail.com deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1424 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/filemap.c:3478! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 UID: 0 PID: 9323 Comm: syz.5.597 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:filemap_fault+0x15b2/0x1620 mm/filemap.c:3478 Code: 49 c6 ff 4c 89 f7 48 c7 c6 e0 ed 33 8c e8 96 09 11 00 90 0f 0b e8 9e 49 c6 ff 4c 89 f7 48 c7 c6 60 e7 33 8c e8 7f 09 11 00 90 <0f> 0b e8 87 49 c6 ff 4c 89 f7 48 c7 c6 e0 ed 33 8c e8 68 09 11 00 RSP: 0018:ffffc900144d71c0 EFLAGS: 00010246 RAX: 183f9497d65b5500 RBX: ffffea0001228018 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffffff8c2a9d00 RDI: 0000000000000001 RBP: ffffc900144d7338 R08: ffffffff903da477 R09: 1ffffffff207b48e R10: dffffc0000000000 R11: fffffbfff207b48f R12: ffffea0001228008 R13: ffff88807b6fc208 R14: ffffea0001228000 R15: dffffc0000000000 FS: 00007f654f9326c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f61a6653440 CR3: 0000000066368000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_fault+0x135/0x390 mm/memory.c:4978 do_read_fault mm/memory.c:5393 [inline] do_fault mm/memory.c:5527 [inline] do_pte_missing mm/memory.c:4048 [inline] handle_pte_fault+0x3f07/0x61c0 mm/memory.c:5890 __handle_mm_fault mm/memory.c:6033 [inline] handle_mm_fault+0x11ae/0x1cd0 mm/memory.c:6202 faultin_page mm/gup.c:1196 [inline] __get_user_pages+0x1a8f/0x4140 mm/gup.c:1494 populate_vma_page_range+0x264/0x330 mm/gup.c:1932 __mm_populate+0x27a/0x460 mm/gup.c:2035 mm_populate include/linux/mm.h:3467 [inline] vm_mmap_pgoff+0x303/0x430 mm/util.c:581 ksys_mmap_pgoff+0x4eb/0x720 mm/mmap.c:607 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: 0033:0x7f654eb8d169 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:00007f654f932038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f654eda6080 RCX: 00007f654eb8d169 RDX: 0000000000000002 RSI: 0000000000b36000 RDI: 0000400000000000 RBP: 00007f654ec0e2a0 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f654eda6080 R15: 00007ffc0d9602e8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:filemap_fault+0x15b2/0x1620 mm/filemap.c:3478 Code: 49 c6 ff 4c 89 f7 48 c7 c6 e0 ed 33 8c e8 96 09 11 00 90 0f 0b e8 9e 49 c6 ff 4c 89 f7 48 c7 c6 60 e7 33 8c e8 7f 09 11 00 90 <0f> 0b e8 87 49 c6 ff 4c 89 f7 48 c7 c6 e0 ed 33 8c e8 68 09 11 00 RSP: 0018:ffffc900144d71c0 EFLAGS: 00010246 RAX: 183f9497d65b5500 RBX: ffffea0001228018 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffffff8c2a9d00 RDI: 0000000000000001 RBP: ffffc900144d7338 R08: ffffffff903da477 R09: 1ffffffff207b48e R10: dffffc0000000000 R11: fffffbfff207b48f R12: ffffea0001228008 R13: ffff88807b6fc208 R14: ffffea0001228000 R15: dffffc0000000000 FS: 00007f654f9326c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcf53d4bc8 CR3: 0000000066368000 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