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AHgh+RqBdgk3EJ08gObv4byR2b69pJjNR3ud5qTY4vPs75TNRNcjjbJalk0dzfzDVid36VWEiCAhVyOjUV5sOLU=@vger.kernel.org X-Gm-Message-State: AOJu0Yyd9Xp+wHQCBKm8ZKnzO2OgiJf1JZfrbAsKTlfmubayHUAY/MPN 4YjaIjoJgH73Oz2l0JiyCdO8DyQynFvqm4mvCLczi0YCgNtkCZvMsyMYBc0GLpqFJvhII2EbFbl u/0stGLBBnSifNnz/Lr3DCS8auN8IgrAnyV5CVnRlFWsE9s2FfhSHN5r5Db8= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:4f14:b0:495:f104:d898 with SMTP id 5614622812f47-4a47a65cf88mr10414634b6e.32.1784240103662; Thu, 16 Jul 2026 15:15:03 -0700 (PDT) Date: Thu, 16 Jul 2026 15:15:03 -0700 In-Reply-To: <20260716120914.9099-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a5957e7.42649fcc.a68e.05cf.GAE@google.com> Subject: Re: [syzbot] [usb?] memory leak in uss720_probe From: syzbot To: kartikey406@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: general protection fault in kill_all_async_requests_priv Oops: general protection fault, probably for non-canonical address 0x6230343037302d77: 0000 [#1] SMP PTI CPU: 0 UID: 0 PID: 6530 Comm: kworker/0:7 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:usb_kill_urb+0x30/0x140 drivers/usb/core/urb.c:706 Code: 55 53 48 83 ec 30 65 48 8b 1d d4 4f dd 05 48 89 5c 24 28 48 89 fb e8 8f 03 c3 fd 2e 2e 2e 31 c0 48 85 db 74 4c e8 80 03 c3 fd <48> 83 7b 40 00 74 40 e8 74 03 c3 fd 48 83 7b 48 00 74 34 e8 68 03 RSP: 0018:ffffc900031ef680 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 6230343037302d37 RCX: ffffffff83c14112 RDX: ffff888109a6ec00 RSI: ffffffff83c14050 RDI: 6230343037302d37 RBP: 7369646632785c4c R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 7369646632785c4c R13: ffff88812c3cd6f0 R14: ffff88812c3cd6e0 R15: 000000000000001f FS: 0000000000000000(0000) GS:ffff8881b202b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000561313ede480 CR3: 000000012f13a000 CR4: 00000000003526f0 Call Trace: kill_all_async_requests_priv.isra.0+0x58/0x90 drivers/usb/misc/uss720.c:185 get_1284_register.cold+0x19/0x5b drivers/usb/misc/uss720.c:227 uss720_probe+0x1fa/0x2e0 drivers/usb/misc/uss720.c:735 usb_probe_interface+0x210/0x480 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x12f/0x3a0 drivers/base/dd.c:706 __driver_probe_device+0xe9/0x1a0 drivers/base/dd.c:868 driver_probe_device+0x28/0xf0 drivers/base/dd.c:898 __device_attach_driver+0x10f/0x170 drivers/base/dd.c:1026 bus_for_each_drv+0xd2/0x130 drivers/base/bus.c:500 __device_attach+0xf9/0x290 drivers/base/dd.c:1098 device_initial_probe+0x6f/0x80 drivers/base/dd.c:1153 bus_probe_device+0x3e/0xb0 drivers/base/bus.c:620 device_add+0x99f/0xc80 drivers/base/core.c:3772 usb_set_configuration+0x8f5/0xb80 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0x73/0xb0 drivers/usb/core/generic.c:250 usb_probe_device+0x78/0x1f0 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x12f/0x3a0 drivers/base/dd.c:706 __driver_probe_device+0xe9/0x1a0 drivers/base/dd.c:868 driver_probe_device+0x28/0xf0 drivers/base/dd.c:898 __device_attach_driver+0x10f/0x170 drivers/base/dd.c:1026 bus_for_each_drv+0xd2/0x130 drivers/base/bus.c:500 __device_attach+0xf9/0x290 drivers/base/dd.c:1098 device_initial_probe+0x6f/0x80 drivers/base/dd.c:1153 bus_probe_device+0x3e/0xb0 drivers/base/bus.c:620 device_add+0x99f/0xc80 drivers/base/core.c:3772 usb_new_device.cold+0x115/0x626 drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x1723/0x2180 drivers/usb/core/hub.c:5953 process_one_work+0x277/0x5a0 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x255/0x4a0 kernel/workqueue.c:3486 kthread+0x14e/0x1a0 kernel/kthread.c:436 ret_from_fork+0x219/0x490 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 55 push %rbp 1: 53 push %rbx 2: 48 83 ec 30 sub $0x30,%rsp 6: 65 48 8b 1d d4 4f dd mov %gs:0x5dd4fd4(%rip),%rbx # 0x5dd4fe2 d: 05 e: 48 89 5c 24 28 mov %rbx,0x28(%rsp) 13: 48 89 fb mov %rdi,%rbx 16: e8 8f 03 c3 fd call 0xfdc303aa 1b: 2e 2e 2e 31 c0 cs cs cs xor %eax,%eax 20: 48 85 db test %rbx,%rbx 23: 74 4c je 0x71 25: e8 80 03 c3 fd call 0xfdc303aa * 2a: 48 83 7b 40 00 cmpq $0x0,0x40(%rbx) <-- trapping instruction 2f: 74 40 je 0x71 31: e8 74 03 c3 fd call 0xfdc303aa 36: 48 83 7b 48 00 cmpq $0x0,0x48(%rbx) 3b: 74 34 je 0x71 3d: e8 .byte 0xe8 3e: 68 .byte 0x68 3f: 03 .byte 0x3 Tested on: commit: 481ed5dd Merge tag 'landlock-7.2-rc4' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=138b4b46580000 kernel config: https://syzkaller.appspot.com/x/.config?x=b80376788da8bcda dashboard link: https://syzkaller.appspot.com/bug?extid=56962eb32ba0136cd330 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 patch: https://syzkaller.appspot.com/x/patch.diff?x=129ad4b9580000