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 9C9FE45BD4B for ; Fri, 21 Aug 2026 09:22:38 +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=1787304168; cv=none; b=C9qoFcTpkcXeH9t/qqM+y9aHgHNQ3+KxC+937q681J2d/oV/qODx/MQZ/bFmz8fannLy+Bd4XDwC02Osg2WetNG/xna5v7OsAQwB/t9p9aV7rnu/yooYeRQoHMAjDZMh6WSCWNonS+JiJyArgECqBVNAhtOm5EHO/frmLWUKIPI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787304168; c=relaxed/simple; bh=R+Falvb7aeh3+wZfKYk5GYqgEeVUVSPc27M2lUs84RM=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; 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2002:a05:6808:308a:b0:497:df42:1e04 with SMTP id 5614622812f47-4b2ef4d45f6mr4569223b6e.18.1787304152203; Fri, 21 Aug 2026 02:22:32 -0700 (PDT) Date: Fri, 21 Aug 2026 02:22:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a8818d8.ae6ddae5.3da009.0030.GAE@google.com> Subject: [syzbot] [usb?] general protection fault in ucsi_acpi_probe From: syzbot To: gregkh@linuxfoundation.org, heikki.krogerus@linux.intel.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 4477a78374a5 Add linux-next specific files for 20260814 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=114036c6580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9b32a36dd637b06f dashboard link: https://syzkaller.appspot.com/bug?extid=23cf45a9fce78e4e0dc1 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c60679580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/994c1c8c560e/disk-4477a783.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/cd54543d69ae/vmlinux-4477a783.xz kernel image: https://storage.googleapis.com/syzbot-assets/407cdf8f3fc2/bzImage-4477a783.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+23cf45a9fce78e4e0dc1@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc00000000e5: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000728-0x000000000000072f] CPU: 1 UID: 0 PID: 5814 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:ucsi_acpi_probe+0x6c/0x4b0 drivers/usb/typec/ucsi/ucsi_acpi.c:199 Code: 89 74 24 08 4c 8b 23 4c 89 e7 e8 ef df 54 fd 49 83 c4 f0 45 31 f6 84 c0 4d 0f 45 f4 49 81 c6 2c 07 00 00 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 16 04 00 00 41 8b 2e 31 ff 89 ee e8 cb RSP: 0018:ffffc9000272fab8 EFLAGS: 00010203 RAX: 00000000000000e5 RBX: ffff88801db68430 RCX: ffff88807f249f40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff88802b52e5a3 R09: 1ffff110056a5cb4 R10: dffffc0000000000 R11: ffffffff87e620e0 R12: fffffffffffffff0 R13: dffffc0000000000 R14: 000000000000072c R15: 1ffff11003b6d086 FS: 000055555ee6f500(0000) GS:ffff888124df8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb722c70000 CR3: 0000000075912000 CR4: 00000000003526f0 Call Trace: platform_probe+0xf9/0x190 drivers/base/platform.c:1507 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 device_driver_attach+0xe0/0x1d0 drivers/base/dd.c:1203 bind_store+0x1d0/0x220 drivers/base/bus.c:267 kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x612/0xba0 fs/read_write.c:687 ksys_write+0x150/0x270 fs/read_write.c:739 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: 0033:0x7fb722d9e0d9 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:00007fff7bf8acb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fb723025fa0 RCX: 00007fb722d9e0d9 RDX: 0000000000000007 RSI: 0000200000000180 RDI: 0000000000000004 RBP: 00007fb722e35024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb723025fac R14: 00007fb723025fa0 R15: 00007fb723025fa0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ucsi_acpi_probe+0x6c/0x4b0 drivers/usb/typec/ucsi/ucsi_acpi.c:199 Code: 89 74 24 08 4c 8b 23 4c 89 e7 e8 ef df 54 fd 49 83 c4 f0 45 31 f6 84 c0 4d 0f 45 f4 49 81 c6 2c 07 00 00 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 16 04 00 00 41 8b 2e 31 ff 89 ee e8 cb RSP: 0018:ffffc9000272fab8 EFLAGS: 00010203 RAX: 00000000000000e5 RBX: ffff88801db68430 RCX: ffff88807f249f40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff88802b52e5a3 R09: 1ffff110056a5cb4 R10: dffffc0000000000 R11: ffffffff87e620e0 R12: fffffffffffffff0 R13: dffffc0000000000 R14: 000000000000072c R15: 1ffff11003b6d086 FS: 000055555ee6f500(0000) GS:ffff888124cf8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb722fee000 CR3: 0000000075912000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 89 74 24 08 mov %esi,0x8(%rsp) 4: 4c 8b 23 mov (%rbx),%r12 7: 4c 89 e7 mov %r12,%rdi a: e8 ef df 54 fd call 0xfd54dffe f: 49 83 c4 f0 add $0xfffffffffffffff0,%r12 13: 45 31 f6 xor %r14d,%r14d 16: 84 c0 test %al,%al 18: 4d 0f 45 f4 cmovne %r12,%r14 1c: 49 81 c6 2c 07 00 00 add $0x72c,%r14 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 16 04 00 00 jne 0x44d 37: 41 8b 2e mov (%r14),%ebp 3a: 31 ff xor %edi,%edi 3c: 89 ee mov %ebp,%esi 3e: e8 .byte 0xe8 3f: cb lret --- 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