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AHgh+RrQbuSt6iCrfYjZ9VB5I8nDvTho0FQdel2yoiVUuxr/p7AbYQGirTVZAY0jd/S5hDJou2Eim62ZG8VmfB8=@vger.kernel.org X-Gm-Message-State: AFuF++l3dyJ14QEvqjyZmyCTXgK8z9g2IZKbwmjAFAP8tkhLzlvMTtu5 2rT892w9I5ubHcl0w+r2jWJFoAP0fQkW80QUKkrlVs6S8U5sl8Dz+lcay1C7UfsiLJHMs7BYJ+A av/PBYXFj1m8wWEh0sDyF+xXrUC2L8h3UvVBHCSQm7eEHW+Y/tD/9aDf59+0= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4c89:b0:6b1:5b3e:13a3 with SMTP id 006d021491bc7-6b16b42654emr20396820eaf.30.1787629420739; Mon, 24 Aug 2026 20:43:40 -0700 (PDT) Date: Mon, 24 Aug 2026 20:43:40 -0700 In-Reply-To: <6a88012e.dbb3a75c.13dd47.0007.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a8d0f6c.dbb3a75c.7844.001d.GAE@google.com> Subject: Re: [syzbot] [usb?] general protection fault in wcove_typec_probe From: syzbot To: gregkh@linuxfoundation.org, heikki.krogerus@linux.intel.com, jeffinphilip14@gmail.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, mika.westerberg@linux.intel.com, stable@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 66498c75b4f8 Merge tag 'dmaengine-7.3-rc1' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1253719e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3e64b1bf01d830ed dashboard link: https://syzkaller.appspot.com/bug?extid=1a01783ea233350598b5 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 userspace arch: i386 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17491979580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-66498c75.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5ce4685e13ba/vmlinux-66498c75.xz kernel image: https://storage.googleapis.com/syzbot-assets/6a32d8e997a7/bzImage-66498c75.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1a01783ea233350598b5@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 UID: 0 PID: 5912 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:wcove_typec_probe+0xdb/0x780 drivers/usb/typec/tcpm/wcove.c:621 Code: 48 c1 ea 03 80 3c 02 00 0f 85 af 05 00 00 48 8d 7d 08 4d 89 af 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 7f 05 00 00 49 8d bf 90 00 00 00 48 8b 6d 08 48 RSP: 0018:ffffc90002f6faf8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8880226c1000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000000 R10: ffff888014243883 R11: 000000000000001f R12: ffffffff904a7ea8 R13: ffff8880226c1010 R14: ffff8880142438c0 R15: ffff888014243838 FS: 0000000000000000(0000) GS:ffff888096982000(0063) knlGS:00000000f67e5b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000032e24008 CR3: 000000004e2f1000 CR4: 0000000000352ef0 Call Trace: platform_probe+0x106/0x1d0 drivers/base/platform.c:1507 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x210/0x460 drivers/base/dd.c:868 device_driver_attach+0xd1/0x220 drivers/base/dd.c:1203 bind_store+0xf4/0x190 drivers/base/bus.c:267 drv_attr_store+0x74/0xb0 drivers/base/bus.c:125 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6af/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline] __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf6feefec Code: Unable to access opcode bytes at 0xf6feefc2. RSP: 002b:00000000f67e550c EFLAGS: 00000292 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000080000400 RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:wcove_typec_probe+0xdb/0x780 drivers/usb/typec/tcpm/wcove.c:621 Code: 48 c1 ea 03 80 3c 02 00 0f 85 af 05 00 00 48 8d 7d 08 4d 89 af 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 7f 05 00 00 49 8d bf 90 00 00 00 48 8b 6d 08 48 RSP: 0018:ffffc90002f6faf8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8880226c1000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000000 R10: ffff888014243883 R11: 000000000000001f R12: ffffffff904a7ea8 R13: ffff8880226c1010 R14: ffff8880142438c0 R15: ffff888014243838 FS: 0000000000000000(0000) GS:ffff888096a82000(0063) knlGS:00000000f67e5b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00007f45dd833708 CR3: 000000004e2f1000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 48 c1 ea 03 shr $0x3,%rdx 4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 8: 0f 85 af 05 00 00 jne 0x5bd e: 48 8d 7d 08 lea 0x8(%rbp),%rdi 12: 4d 89 af 88 00 00 00 mov %r13,0x88(%r15) 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 7f 05 00 00 jne 0x5b3 34: 49 8d bf 90 00 00 00 lea 0x90(%r15),%rdi 3b: 48 8b 6d 08 mov 0x8(%rbp),%rbp 3f: 48 rex.W --- 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.