From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0AB58C433FE for ; Wed, 16 Nov 2022 14:54:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229693AbiKPOyy (ORCPT ); Wed, 16 Nov 2022 09:54:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46602 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232126AbiKPOyp (ORCPT ); Wed, 16 Nov 2022 09:54:45 -0500 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E193F10B for ; Wed, 16 Nov 2022 06:54:43 -0800 (PST) Received: by mail-il1-f198.google.com with SMTP id k3-20020a92c243000000b0030201475a6bso13283726ilo.9 for ; Wed, 16 Nov 2022 06:54:43 -0800 (PST) X-Google-DKIM-Signature: v=1; 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charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 1621b6eaebf7 Merge branch 'for-next/fixes' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=14016169880000 kernel config: https://syzkaller.appspot.com/x/.config?x=606e57fd25c5c6cc dashboard link: https://syzkaller.appspot.com/bug?extid=b90b43fd4c6589e96a39 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1112f7a9880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17c33e69880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/82aa7741098d/disk-1621b6ea.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f6be08c4e4c2/vmlinux-1621b6ea.xz kernel image: https://storage.googleapis.com/syzbot-assets/296b6946258a/Image-1621b6ea.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b90b43fd4c6589e96a39@syzkaller.appspotmail.com Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 Mem abort info: ESR = 0x0000000096000004 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault Data abort info: ISV = 0, ISS = 0x00000004 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=000000010bfaa000 [0000000000000010] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 3059 Comm: udevd Not tainted 6.1.0-rc4-syzkaller-31872-g1621b6eaebf7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : simple_xattrs_free include/linux/xattr.h:111 [inline] pc : shmem_evict_inode+0x2d0/0x3d8 mm/shmem.c:1164 lr : simple_xattrs_free include/linux/xattr.h:110 [inline] lr : shmem_evict_inode+0x2f0/0x3d8 mm/shmem.c:1164 sp : ffff800012c0ba40 x29: ffff800012c0ba90 x28: ffff80000d890000 x27: ffff0000ccf252a0 x26: 00000000000800e0 x25: 0000000000000001 x24: 0000000000000001 x23: ffff0000ccf254c8 x22: ffff0000c0cb6e00 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000ccf25310 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80000db1a158 x15: ffff0000c64dcec0 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000c64dcec0 x11: ff8080000842e558 x10: 0000000000000000 x9 : ffff80000842e558 x8 : ffff0000c64dcec0 x7 : ffff8000085252dc x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff80000cdfe6d9 x0 : ffff8001f1dbd000 Call trace: simple_xattrs_free include/linux/xattr.h:110 [inline] shmem_evict_inode+0x2d0/0x3d8 mm/shmem.c:1164 evict+0xec/0x334 fs/inode.c:664 iput_final fs/inode.c:1747 [inline] iput+0x2c4/0x324 fs/inode.c:1773 dentry_unlink_inode+0x204/0x21c fs/dcache.c:401 __dentry_kill+0x15c/0x37c fs/dcache.c:607 dentry_kill+0x8c/0x194 dput+0x194/0x2e0 fs/dcache.c:913 do_renameat2+0x49c/0x758 fs/namei.c:4931 __do_sys_renameat fs/namei.c:4969 [inline] __se_sys_renameat fs/namei.c:4966 [inline] __arm64_sys_renameat+0x64/0x7c fs/namei.c:4966 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 Code: 97f9cd15 f84d0f74 eb1b029f 540001a0 (f9400a80) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97f9cd15 bl 0xffffffffffe73454 4: f84d0f74 ldr x20, [x27, #208]! 8: eb1b029f cmp x20, x27 c: 540001a0 b.eq 0x40 // b.none * 10: f9400a80 ldr x0, [x20, #16] <-- trapping instruction --- 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches