From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f199.google.com (mail-oi1-f199.google.com [209.85.167.199]) (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 D68153B42FC for ; Sun, 4 Oct 2026 02:47:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791082049; cv=none; b=SNHAsSsaO6DkMG2n/PQqUr+nDmhoQmsbkMZPQSxiEBQfumDpKDr0ZFjwtE/YWCfot/SVyXcYbreDkGpsBj8DNqLaucaJaVQVXxhV7LdegRmZO7rKtYq1vbPHK7YKUX7zPSwUUWja1Ke3D9J8hL4iLAh4l+I1zia81ERamsDuDco= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791082049; c=relaxed/simple; bh=ZLXh7kAVslpGfEMmAwHtBJofllnliT+RC5CpD6EaVXE=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=uWOqeUzuNJrwfRT7TKljbfK8Q3952w9aR67B6K+br9Zdll2d7QLOE4C+4vU/L8Hxstci9jDtVTqdwvw7Fj1XcZuF8sFjKT357qBpr/4gBeWImeKPCg0HORiROgtK+yn3Ro6QY7r67CStNmd/rV3Y26xTMHQB1msZuYmyvjmoY/8= 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=209.85.167.199 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-oi1-f199.google.com with SMTP id 5614622812f47-4dc57e2a3f2so1065665b6e.0 for ; Sat, 03 Oct 2026 19:47:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1791082047; x=1791686847; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=qm/OpLOEFODefzF9z/W5ckklxGnVbnPi8612Pj9dd2Q=; b=gvQxSAMaSgWjNEIzjfMUPr4AIaPOZXVS6wsAot1wNflIEqjfYb1LcuUT623c21Wgp5 2sMBlsfjLqvoi7Vsc0JmTdCr1LeEtHrSGnTwf72E3seMtVEKVC/w8o2fSVJ2NrKdhBSZ ZCNSB6tM47hWjufvTYIvgwyAlR9N6vQhe//UkiNk9nWO3RXQvYf84n37R4EMCRoQsD6H 6aOX4ECkUisAPtS1iPMz9HfL5aLQaJ8GP1e6werwWQ260FT6U2vzCwswlqtOFaXMYH3t 5qS3uY/FgvaHjLXSuW/hk5soDZYKQcZE65BLEr230pn1NDO0IMtDQ/8eHHtJ0u76+A98 pkkg== X-Forwarded-Encrypted: i=1; AKwUvByciDCwo/6iz2ggegzgPQtM6JqHJ4Y41BC0rXDB+PU9E41T9E+ileg8LwwbtpHHgzkm38MuPZHF+1yG9Z0=@vger.kernel.org X-Gm-Message-State: AFuF++lO7Caf9/xXKXg0f8vGjvPY2zjEio8jEB0xoZW+/xiydgeG8TyH Wjj2Sztc8EOBfvdY1uppvQqi1TawnvnzTvevNOJuUCgSB75UibpjgosSl5/i046ZwKmba22aXXJ h+hAPbO7AVCodHsqjHLdfnYE+Zog41VzifdOlqznPAKaAfgDTsZyLKu7gfqU= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:3c46:b0:4c0:12f3:6007 with SMTP id 5614622812f47-4f67703d6edmr4252671b6e.4.1791082046673; Sat, 03 Oct 2026 19:47:26 -0700 (PDT) Date: Sat, 03 Oct 2026 19:47:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ac1be3e.9ad129c8.3858c0.0025.GAE@google.com> Subject: [syzbot] [lsm?] general protection fault in smack_inode_permission (4) From: syzbot To: casey@schaufler-ca.com, jmorris@namei.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, paul@paul-moore.com, serge@hallyn.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: ce1e0223d8ad Merge tag 'devicetree-fixes-for-7.3-2' of git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12555b15580000 kernel config: https://syzkaller.appspot.com/x/.config?x=718e346eb0b8f38 dashboard link: https://syzkaller.appspot.com/bug?extid=fc1d5d9a7ebabbc27458 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/4167e1ad25c1/disk-ce1e0223.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a0a74c8dec59/vmlinux-ce1e0223.xz kernel image: https://storage.googleapis.com/syzbot-assets/f6caa72edd70/bzImage-ce1e0223.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fc1d5d9a7ebabbc27458@syzkaller.appspotmail.com ERROR: (device loop4): jfs_readdir: JFS:Dtree error: ino = 2, bn=0, index = 3 ERROR: (device loop4): jfs_readdir: JFS:Dtree error: ino = 2, bn=0, index = 5 ERROR: (device loop4): jfs_readdir: JFS:Dtree error: ino = 2, bn=0, index = 6 Oops: general protection fault, probably for non-canonical address 0xdffffc018bd1a30b: 0000 [#1] SMP KASAN PTI KASAN: probably user-memory-access in range [0x0000000c5e8d1858-0x0000000c5e8d185f] CPU: 1 UID: 0 PID: 5607 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:smk_of_inode security/smack/smack.h:411 [inline] RIP: 0010:smack_inode_permission+0x265/0x320 security/smack/smack_lsm.c:1260 Code: 83 c5 38 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8 1d 99 ab fd 44 8b 3d 66 df 2c 09 4d 03 7d 00 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 fd 98 ab fd 49 8b 3f 44 89 f6 48 8d RSP: 0018:ffffc900058c7920 EFLAGS: 00010202 RAX: 000000018bd1a30b RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc900058c7978 RBP: ffffc900058c7a28 R08: ffffc900058c79af R09: 0000000000000000 R10: ffffc900058c7980 R11: fffff52000b18f36 R12: 1ffff92000b18f28 R13: ffff888040368e20 R14: 0000000000000001 R15: 0000000c5e8d1858 FS: 0000555564dc7500(0000) GS:ffff888125cc3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc8c0efcf0 CR3: 000000002ad9e000 CR4: 00000000003526f0 Call Trace: security_inode_permission+0xf4/0x2e0 security/security.c:1842 lookup_inode_permission_may_exec fs/namei.c:696 [inline] may_lookup fs/namei.c:1961 [inline] link_path_walk+0xc30/0x1910 fs/namei.c:2604 path_lookupat+0xe4/0x8c0 fs/namei.c:2812 filename_lookup+0x265/0x5d0 fs/namei.c:2842 user_path_at+0x40/0x160 fs/namei.c:3641 ksys_umount fs/namespace.c:2067 [inline] __do_sys_umount fs/namespace.c:2075 [inline] __se_sys_umount fs/namespace.c:2073 [inline] __x64_sys_umount+0xf6/0x170 fs/namespace.c:2073 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fabd8aaf397 Code: a2 c7 05 5c 43 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffc8c0f0348 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 00007fabd8b444bb RCX: 00007fabd8aaf397 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc8c0f0400 RBP: 00007ffc8c0f0400 R08: 00007ffc8c0f1400 R09: 00000000ffffffff R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc8c0f14f0 R13: 00007fabd8b444bb R14: 00000000000345b3 R15: 00007ffc8c0f25c0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:smk_of_inode security/smack/smack.h:411 [inline] RIP: 0010:smack_inode_permission+0x265/0x320 security/smack/smack_lsm.c:1260 Code: 83 c5 38 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8 1d 99 ab fd 44 8b 3d 66 df 2c 09 4d 03 7d 00 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 fd 98 ab fd 49 8b 3f 44 89 f6 48 8d RSP: 0018:ffffc900058c7920 EFLAGS: 00010202 RAX: 000000018bd1a30b RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc900058c7978 RBP: ffffc900058c7a28 R08: ffffc900058c79af R09: 0000000000000000 R10: ffffc900058c7980 R11: fffff52000b18f36 R12: 1ffff92000b18f28 R13: ffff888040368e20 R14: 0000000000000001 R15: 0000000c5e8d1858 FS: 0000555564dc7500(0000) GS:ffff888125cc3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc8c0efcf0 CR3: 000000002ad9e000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 83 c5 38 add $0x38,%ebp 3: 4c 89 e8 mov %r13,%rax 6: 48 c1 e8 03 shr $0x3,%rax a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) e: 74 08 je 0x18 10: 4c 89 ef mov %r13,%rdi 13: e8 1d 99 ab fd call 0xfdab9935 18: 44 8b 3d 66 df 2c 09 mov 0x92cdf66(%rip),%r15d # 0x92cdf85 1f: 4d 03 7d 00 add 0x0(%r13),%r15 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 ff mov %r15,%rdi 33: e8 fd 98 ab fd call 0xfdab9935 38: 49 8b 3f mov (%r15),%rdi 3b: 44 89 f6 mov %r14d,%esi 3e: 48 rex.W 3f: 8d .byte 0x8d --- 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