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AJvYcCUlidfvWy51GgfbMwgM+m1qvtd+/L8oEY/KEtKPonkTgAYg2IQDb3k/0ykickN+Z5ejM3hhR6Y9EYEjdyU=@vger.kernel.org X-Gm-Message-State: AOJu0YxLWxJ1P9xCxBerBgqdtD9VihGvKoNPOlJvldYA5rn6XjR6ZLXf 80cw5C5O+3otH5XKRugzw5o3PMEC8L1Z3e9q92EGbEzLhvDJ4wF4JykZU/X1Go6eEaQ3mTUFYG8 /GbNpjl5ck58SHRpAnSPp68YvYW9Te1sTyUlizMsJ5gDbiIPMZPGdNnQ= X-Google-Smtp-Source: AGHT+IGZiuusz9APmkDNUZ/S4dbJO1p5/YEgUvKNRBfCnp+6wbvkccstA736bOpip64D46BTrL0DHrZSpdT74Wt6gBBCb03RVjMx Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1d1a:b0:3a0:97fe:e89e with SMTP id e9e14a558f8ab-3a097fee929mr47819725ab.18.1726425663029; Sun, 15 Sep 2024 11:41:03 -0700 (PDT) Date: Sun, 15 Sep 2024 11:41:03 -0700 In-Reply-To: <20240915181301.18904-1-aha310510@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000060587d06222ccca6@google.com> Subject: Re: [syzbot] [usb?] KMSAN: kernel-infoleak in iowarrior_read From: syzbot To: aha310510@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: KMSAN: kernel-infoleak in iowarrior_read ===================================================== BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in _inline_copy_to_user include/linux/uaccess.h:180 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x110 lib/usercopy.c:26 instrument_copy_to_user include/linux/instrumented.h:114 [inline] _inline_copy_to_user include/linux/uaccess.h:180 [inline] _copy_to_user+0xbc/0x110 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:209 [inline] iowarrior_read+0xb02/0xdc0 drivers/usb/misc/iowarrior.c:326 vfs_read+0x2a1/0xf60 fs/read_write.c:474 ksys_read+0x20f/0x4c0 fs/read_write.c:619 __do_sys_read fs/read_write.c:629 [inline] __se_sys_read fs/read_write.c:627 [inline] __x64_sys_read+0x93/0xe0 fs/read_write.c:627 x64_sys_call+0x3055/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:3998 [inline] slab_alloc_node mm/slub.c:4041 [inline] __do_kmalloc_node mm/slub.c:4161 [inline] __kmalloc_noprof+0x661/0xf30 mm/slub.c:4174 kmalloc_noprof include/linux/slab.h:685 [inline] kmalloc_array_noprof include/linux/slab.h:726 [inline] iowarrior_probe+0x10ea/0x1b90 drivers/usb/misc/iowarrior.c:836 usb_probe_interface+0xd6f/0x1350 drivers/usb/core/driver.c:399 really_probe+0x4db/0xd90 drivers/base/dd.c:657 __driver_probe_device+0x2ab/0x5d0 drivers/base/dd.c:799 driver_probe_device+0x72/0x890 drivers/base/dd.c:829 __device_attach_driver+0x568/0x9e0 drivers/base/dd.c:957 bus_for_each_drv+0x403/0x620 drivers/base/bus.c:457 __device_attach+0x3c1/0x650 drivers/base/dd.c:1029 device_initial_probe+0x32/0x40 drivers/base/dd.c:1078 bus_probe_device+0x3dc/0x5c0 drivers/base/bus.c:532 device_add+0x13aa/0x1ba0 drivers/base/core.c:3682 usb_set_configuration+0x31c9/0x38d0 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x109/0x2a0 drivers/usb/core/generic.c:254 usb_probe_device+0x3a7/0x690 drivers/usb/core/driver.c:294 really_probe+0x4db/0xd90 drivers/base/dd.c:657 __driver_probe_device+0x2ab/0x5d0 drivers/base/dd.c:799 driver_probe_device+0x72/0x890 drivers/base/dd.c:829 __device_attach_driver+0x568/0x9e0 drivers/base/dd.c:957 bus_for_each_drv+0x403/0x620 drivers/base/bus.c:457 __device_attach+0x3c1/0x650 drivers/base/dd.c:1029 device_initial_probe+0x32/0x40 drivers/base/dd.c:1078 bus_probe_device+0x3dc/0x5c0 drivers/base/bus.c:532 device_add+0x13aa/0x1ba0 drivers/base/core.c:3682 usb_new_device+0x15f4/0x2470 drivers/usb/core/hub.c:2651 hub_port_connect drivers/usb/core/hub.c:5521 [inline] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] port_event drivers/usb/core/hub.c:5821 [inline] hub_event+0x4ffb/0x72d0 drivers/usb/core/hub.c:5903 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3312 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3393 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Bytes 0-72 of 73 are uninitialized Memory access of size 73 starts at ffff88811889e000 Data copied to user address 0000000020000000 CPU: 1 UID: 0 PID: 6520 Comm: syz.0.143 Not tainted 6.11.0-syzkaller-g98f7e32f20d2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 ===================================================== Tested on: commit: 98f7e32f Linux 6.11 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=117b97c7980000 kernel config: https://syzkaller.appspot.com/x/.config?x=3ab8d456be59dad9 dashboard link: https://syzkaller.appspot.com/bug?extid=b8080cbc8d286a5fa23a compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied.