Hello, syzbot found the following issue on: HEAD commit: af2ea8ab7a54 Add linux-next specific files for 20241205 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=1210e8df980000 kernel config: https://syzkaller.appspot.com/x/.config?x=76f158395f6f15fd dashboard link: https://syzkaller.appspot.com/bug?extid=67a21f2b4c8e9e650adf compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=111050f8580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=136fade8580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/8af0861258fa/disk-af2ea8ab.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ffb38cf7a344/vmlinux-af2ea8ab.xz kernel image: https://storage.googleapis.com/syzbot-assets/6fbd2e50358a/bzImage-af2ea8ab.xz The issue was bisected to: commit 51ac493f56fa00b052be4fbc94ac91f057ebc2e7 Author: Yu Zhao <yuzhao@xxxxxxxxxx> Date: Mon Dec 2 03:28:19 2024 +0000 mm/mglru: optimize deactivation bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=141418df980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=161418df980000 console output: https://syzkaller.appspot.com/x/log.txt?x=121418df980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+67a21f2b4c8e9e650adf@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 51ac493f56fa ("mm/mglru: optimize deactivation") __kernel_write_iter+0x42a/0x940 fs/read_write.c:612 __kernel_write fs/read_write.c:632 [inline] kernel_write+0x214/0x330 fs/read_write.c:653 process_sysctl_arg+0x3f7/0x650 fs/proc/proc_sysctl.c:1683 parse_one kernel/params.c:153 [inline] parse_args+0x623/0xdc0 kernel/params.c:186 do_sysctl_args+0xeb/0x180 fs/proc/proc_sysctl.c:1715 kernel_init+0x80/0x2b0 init/main.c:1489 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 page_owner free stack trace missing ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5828 at ./include/linux/memcontrol.h:730 folio_lruvec include/linux/memcontrol.h:730 [inline] WARNING: CPU: 0 PID: 5828 at ./include/linux/memcontrol.h:730 lru_gen_clear_refs+0x498/0x520 mm/swap.c:410 Modules linked in: CPU: 0 UID: 0 PID: 5828 Comm: syz-executor425 Not tainted 6.13.0-rc1-next-20241205-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:folio_lruvec include/linux/memcontrol.h:730 [inline] RIP: 0010:lru_gen_clear_refs+0x498/0x520 mm/swap.c:410 Code: 66 ff ff ff e8 99 dc c2 ff e9 92 fe ff ff e8 8f dc c2 ff 4c 89 e7 48 c7 c6 20 c9 13 8c e8 20 95 0c 00 c6 05 4c 86 27 0e 01 90 <0f> 0b 90 e9 7b fc ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 43 fd RSP: 0018:ffffc90003787460 EFLAGS: 00010246 RAX: dc5da43f42521400 RBX: 0000000000000000 RCX: ffffc90003787003 RDX: 0000000000000002 RSI: ffffffff8c0aa440 RDI: ffffffff8c5fbe80 RBP: ffffc90003787530 R08: ffffffff9019d9b7 R09: 1ffffffff2033b36 R10: dffffc0000000000 R11: fffffbfff2033b37 R12: ffffea00006a8000 R13: 1ffffd40000d5000 R14: 00fff00000000058 R15: 0000000000000000 FS: 0000555587a6b380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000040 CR3: 000000007213e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> deactivate_file_folio+0x99/0x100 mm/swap.c:679 mapping_try_invalidate+0x28b/0x550 mm/truncate.c:489 drop_pagecache_sb+0x1ab/0x260 fs/drop_caches.c:40 iterate_supers+0xc6/0x190 fs/super.c:934 drop_caches_sysctl_handler+0x8c/0x160 fs/drop_caches.c:64 proc_sys_call_handler+0x5ec/0x920 fs/proc/proc_sysctl.c:601 do_iter_readv_writev+0x600/0x880 vfs_writev+0x376/0xba0 fs/read_write.c:1050 do_writev+0x1b6/0x360 fs/read_write.c:1096 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: 0033:0x7f625e20b329 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc4d77ac58 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007ffc4d77ae28 RCX: 00007f625e20b329 RDX: 0000000000000001 RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 00007f625e27e610 R08: 0000000000000000 R09: 00007ffc4d77ae28 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc4d77ae18 R14: 0000000000000001 R15: 0000000000000001 </TASK> --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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
