From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi2-f1.google.com (mail-oi2-f1.google.com [74.125.231.193]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5FDF83624D7 for ; Thu, 27 Aug 2026 01:06:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.193 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787792779; cv=none; b=ru37LG53fRawEAQmrZpfrZpwKkzKhT4mlaFOF9ddhB0UpjJtszfHrJZ84IK58zMP0YDRyirTlzXa3Ur70/CtA8YJTsN2bZWAfX5Aj8/je+4rUxHWAseEEVKjSWYgpnvMwHzlTMN+zsqfvK9/lFzOQ4ku/CZHHjjm+HiF+TrLSiQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787792779; c=relaxed/simple; bh=LoiG9F4hxau2hXYeWq95y/znfdDGZ7+6dX74dKP72cc=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=MmASfY9jYCCr/Dnl4BHEh6nJ1ZgyW85pYbfOCnfhnhEuZo3xFrNFxgFyW1jqQ3tLKl07/FwRzUABzzfpNDbrn6K3Vw1JgumnNIecq9iZpEPaLFWu7EXfY98q1nLcxgC8niDp7uCpQIjPFPtiFyHHFrjtU6A/qE4C1tQR4Wp0x2A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=74.125.231.193 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi2-f1.google.com with SMTP id 5614622812f47-4b3780fb4f5so266062b6e.1 for ; Wed, 26 Aug 2026 18:06:17 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787792776; x=1788397576; h=content-type:cc:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=pLg++6rb5L1HaK1OhWJhwubZ+umG6JEqO8vV9wlbGAA=; b=U6ji/QWr24XKduJ3ffiVKdynclyQlrxTUDwUFYtGFzt0E2obdlYK+1OQsN++DWImr6 psjdVyhFLNvMM8xZmA6fX4OcY8eYhiQPa38Kp0u1ncBDxITj47gi3NBotJfvdOLpTwI3 QAYtn/OB5kcVL6xsKguHlj5S64F9IUfgyZqE7ZzJw++0r/P8KnWe6lltc1oOO0t/F1p/ ePWaoNbRwgE6iy0YGhIm9DsrzY+unYepll0jCOTHk6IEUQGe3eK77S1yK9OsiMGDCXWT mUW8zQ8l29S5ZgWUnJ+cXddf0NgHZKs8ZnZ1pz3vamrJUJtDZA9axwFJPGgoR0+vmGbZ sXCw== X-Forwarded-Encrypted: i=1; AHgh+RqY1H6oSNgPhPcuVoyCLF9Qyj0Rzdsc5/yCWfXiUQsuihL+DRvhXikFyLAb5+kF08xqe97HaGkJEQn61vA=@vger.kernel.org X-Gm-Message-State: AFuF++kWaSKN/s1SAqT+H/91Vf86gGbN8XnZmx9tkDHYW6bNj42y3nn1 d1g2CfrtD+OLvUTxZFU/HQCgGepA2zk1z1R9liS2KWyEEkdLiAHE4dsk5pATDWSaSNC3nHY4bbv nabbBGQF8mT5mj8ELIMmUCrXGPcjtgMz1swd5Ngg41lmuw35YLv6s6sBkkZ4= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:3a13:b0:4b3:1a95:42c2 with SMTP id 5614622812f47-4b366908e37mr13549254b6e.3.1787792775962; Wed, 26 Aug 2026 18:06:15 -0700 (PDT) Date: Wed, 26 Aug 2026 18:06:15 -0700 In-Reply-To: <7F4D890F-C006-4855-888A-62ED786A32ED@mainlining.org> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a8f8d87.4d659fcc.734b4.0006.GAE@google.com> Subject: Re: [syzbot] [audit?] BUG: unable to handle kernel paging request in integrity_audit_message From: syzbot To: brads@mainlining.org Cc: audit@vger.kernel.org, brads@mainlining.org, eparis@redhat.com, linux-kernel@vger.kernel.org, paul@paul-moore.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" > On 27 August 2026 01:50:45 BST, syzbot > wrote: >>Hello, >> >>syzbot found the following issue on: > > > #syz set subsystems security: The specified label "security" is unknown. Please use one of the supported labels. The following labels are suported: actionable, missing-backport, no-reminders, prio: {low, normal, high}, subsystems: {.. see below ..} The list of subsystems: https://syzkaller.appspot.com/upstream/subsystems?all=true > > > Note: here's my suggested fix, in security/ima_appraise.c > > path = dentry_path(dentry, pathbuf, PATH_MAX); > +if (IS_ERR(path)) > path = NULL; > > > > apparmor and tomoyo both IS_ERR check their dentry_path calls, ima > is the only one that doesnt. NULL fname is already handled by the audit > side > >> >>HEAD commit: 66fb95a52111 Merge tag 'caps-pr-20260820' of >>git://git.ker.. >>git tree: upstream >>console output: https://syzkaller.appspot.com/x/log.txt?x=1560d549580000 >>kernel config: https://syzkaller.appspot.com/x/.config?x=b0978f5ed2905b98 >>dashboard link: >>https://syzkaller.appspot.com/bug?extid=5ebeb3089ea6439c37be >>compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 >>syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16fb4625580000 >> >>Downloadable assets: >>disk image: >>https://storage.googleapis.com/syzbot-assets/e7d9049723b0/disk-66fb95a5.raw.xz >>vmlinux: https://storage.googleapis.com/syzbot-assets/a04d6efe59a0/vmlinux-66fb95a5.xz >>kernel image: >>https://storage.googleapis.com/syzbot-assets/81e3f2b9c049/bzImage-66fb95a5.xz >> >>IMPORTANT: if you fix the issue, please add the following tag to the commit: >>Reported-by: syzbot+5ebeb3089ea6439c37be@syzkaller.appspotmail.com >> >>BUG: unable to handle page fault for address: ffffffffffffffdc >>#PF: supervisor read access in kernel mode >>#PF: error_code(0x0000) - not-present page >>PGD eb97067 P4D eb97067 PUD eb99067 PMD 0 >>Oops: Oops: 0000 [#1] SMP KASAN NOPTI >>CPU: 0 UID: 0 PID: 5818 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) >>Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS >>Google 07/16/2026 >>RIP: 0010:strlen+0x30/0xa0 lib/string.c:402 >>Code: 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 fd 53 48 c1 ea 03 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 <80> 7d 00 00 74 3d 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 >>RSP: 0018:ffffc90003d77940 EFLAGS: 00010246 >>RAX: 0000000000000000 RBX: ffffffffffffffdc RCX: 0000000000000000 >>RDX: 0000000000000004 RSI: ffffffff8207fb91 RDI: ffffffffffffffdc >>RBP: ffffffffffffffdc R08: 0000000000000004 R09: 00000000000000b7 >>R10: 00000000000006c0 R11: ffffffff8bc921d3 R12: ffff8880785a84c0 >>R13: 0000000000000007 R14: 00000000fffffff3 R15: ffffffffffffffdc >>FS: 000055555ec16500(0000) GS:ffff888123b86000(0000) knlGS:0000000000000000 >>CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >>CR2: ffffffffffffffdc CR3: 0000000075fb6000 CR4: 00000000003526f0 >>Call Trace: >> >> __fortify_strlen include/linux/fortify-string.h:218 [inline] >> audit_log_untrustedstring+0x19/0x30 kernel/audit.c:2203 >> integrity_audit_message+0x366/0x4f0 >> security/integrity/integrity_audit.c:60 >> integrity_audit_msg+0x41/0x60 security/integrity/integrity_audit.c:32 >> validate_hash_algo security/integrity/ima/ima_appraise.c:752 [inline] >> ima_inode_setxattr+0x512/0x5f0 security/integrity/ima/ima_appraise.c:775 >> security_inode_setxattr+0x2d0/0x560 security/security.c:1940 >> __vfs_setxattr_locked+0xad/0x2b0 fs/xattr.c:309 >> vfs_setxattr+0x14a/0x390 fs/xattr.c:344 >> do_setxattr+0x145/0x180 fs/xattr.c:662 >> file_setxattr fs/xattr.c:672 [inline] >> file_setxattr+0x139/0x1b0 fs/xattr.c:666 >> path_setxattrat+0x335/0x3b0 fs/xattr.c:732 >> __do_sys_fsetxattr fs/xattr.c:782 [inline] >> __se_sys_fsetxattr fs/xattr.c:779 [inline] >> __x64_sys_fsetxattr+0xc5/0x140 fs/xattr.c:779 >> do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] >> do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 >> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>RIP: 0033:0x7f506239e0d9 >>Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48 >>RSP: 002b:00007fff3373f938 EFLAGS: 00000246 ORIG_RAX: 00000000000000be >>RAX: ffffffffffffffda RBX: 00007f5062625fa0 RCX: 00007f506239e0d9 >>RDX: 0000200000000380 RSI: 0000200000000080 RDI: 0000000000000004 >>RBP: 00007f5062435024 R08: 0000000000000000 R09: 0000000000000000 >>R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 >>R13: 00007f5062625fac R14: 00007f5062625fa0 R15: 00007f5062625fa0 >> >>Modules linked in: >>CR2: ffffffffffffffdc >>---[ end trace 0000000000000000 ]--- >>RIP: 0010:strlen+0x30/0xa0 lib/string.c:402 >>Code: 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 fd 53 48 c1 ea 03 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 <80> 7d 00 00 74 3d 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 >>RSP: 0018:ffffc90003d77940 EFLAGS: 00010246 >>RAX: 0000000000000000 RBX: ffffffffffffffdc RCX: 0000000000000000 >>RDX: 0000000000000004 RSI: ffffffff8207fb91 RDI: ffffffffffffffdc >>RBP: ffffffffffffffdc R08: 0000000000000004 R09: 00000000000000b7 >>R10: 00000000000006c0 R11: ffffffff8bc921d3 R12: ffff8880785a84c0 >>R13: 0000000000000007 R14: 00000000fffffff3 R15: ffffffffffffffdc >>FS: 000055555ec16500(0000) GS:ffff888123b86000(0000) knlGS:0000000000000000 >>CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >>CR2: ffffffffffffffdc CR3: 0000000075fb6000 CR4: 00000000003526f0 >>---------------- >>Code disassembly (best guess): >> 0: 00 00 add %al,(%rax) >> 2: 00 00 add %al,(%rax) >> 4: 00 fc add %bh,%ah >> 6: ff lcall (bad) >> 7: df 55 48 fists 0x48(%rbp) >> a: 89 fa mov %edi,%edx >> c: 48 89 fd mov %rdi,%rbp >> f: 53 push %rbx >> 10: 48 c1 ea 03 shr $0x3,%rdx >> 14: 48 83 ec 08 sub $0x8,%rsp >> 18: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax >> 1c: 48 89 fa mov %rdi,%rdx >> 1f: 83 e2 07 and $0x7,%edx >> 22: 38 d0 cmp %dl,%al >> 24: 7f 04 jg 0x2a >> 26: 84 c0 test %al,%al >> 28: 75 50 jne 0x7a >>* 2a: 80 7d 00 00 cmpb $0x0,0x0(%rbp) <-- trapping instruction >> 2e: 74 3d je 0x6d >> 30: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx >> 37: fc ff df >> 3a: 48 89 e8 mov %rbp,%rax >> 3d: 48 rex.W >> 3e: 83 .byte 0x83 >> 3f: c0 .byte 0xc0 >> >> >>--- >>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 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 >> >> > > --- Thanks! > https://lore.kernel.org/all/EE579805-42F2-4C58-B752-F28779EEB717@grrlz.net/