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2002:a05:6820:1389:b0:6c1:dc9f:ab2e with SMTP id 006d021491bc7-6c53f446182mr2350443eaf.27.1789421186287; Mon, 14 Sep 2026 14:26:26 -0700 (PDT) Date: Mon, 14 Sep 2026 14:26:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6aa86682.f81106d8.2ab401.0055.GAE@google.com> Subject: [syzbot] [usb?] general protection fault in ucsi_acpi_probe (2) 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: 704340f1cd0d Merge tag 'x86_urgent_for_7.3-rc4' of git://g.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=14358df9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=b454dc6b1b7acd30 dashboard link: https://syzkaller.appspot.com/bug?extid=e7aa19176573a6992617 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=10c5bdf9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14c5bdf9580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a1f812f889ad/disk-704340f1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8aa4ccae83ac/vmlinux-704340f1.xz kernel image: https://storage.googleapis.com/syzbot-assets/8f86a50bf181/bzImage-704340f1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e7aa19176573a6992617@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc00000000fc: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000007e0-0x00000000000007e7] CPU: 0 UID: 0 PID: 5618 Comm: syz-executor238 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/08/2026 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 bf 7d cd fd 49 83 c4 f0 45 31 f6 84 c0 4d 0f 45 f4 49 81 c6 e4 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 fb RSP: 0018:ffffc90004c27ab8 EFLAGS: 00010207 RAX: 00000000000000fc RBX: ffff88801d7ac4e8 RCX: ffff888011e4be80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffffff8760c1c0 R12: fffffffffffffff0 R13: dffffc0000000000 R14: 00000000000007e4 R15: 1ffff11003af589d FS: 0000555588eb7400(0000) GS:ffff888125bcb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000000 CR3: 0000000045e66000 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+0x1d3/0x220 drivers/base/bus.c:267 kernfs_fop_write_iter+0x3a5/0x540 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x61e/0xbb0 fs/read_write.c:687 ksys_write+0x156/0x270 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: 0033:0x7f5d40826649 Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd2d524bb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5d40826649 RDX: 0000000000000007 RSI: 0000200000000600 RDI: 0000000000000006 RBP: 0000000000000001 R08: 0000000000000006 R09: 0000000000000006 R10: 0000000000000006 R11: 0000000000000246 R12: 00007ffd2d524d28 R13: 431bde82d7b634db R14: 00007f5d408b9c40 R15: 0000000000000002 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 bf 7d cd fd 49 83 c4 f0 45 31 f6 84 c0 4d 0f 45 f4 49 81 c6 e4 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 fb RSP: 0018:ffffc90004c27ab8 EFLAGS: 00010207 RAX: 00000000000000fc RBX: ffff88801d7ac4e8 RCX: ffff888011e4be80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffffff8760c1c0 R12: fffffffffffffff0 R13: dffffc0000000000 R14: 00000000000007e4 R15: 1ffff11003af589d FS: 0000555588eb7400(0000) GS:ffff888125ccb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555588eb76d0 CR3: 0000000045e66000 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 bf 7d cd fd call 0xfdcd7dce 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 e4 07 00 00 add $0x7e4,%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: fb sti --- 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