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AJvYcCVkQYs8jL93Av6/I5nDu2oous2y2EvvEAcyinhZTR3beE29EE0nh6cbsVLI12CjWlsQkevvpNGCHoDQFgQ=@vger.kernel.org X-Gm-Message-State: AOJu0YwTjm6QK6vErGkB3ipXikuW8O9ihb9SKIxMs9igtK3fRxVglK7V BpBfXJhUGGSbu+nb/z94BO8tRA7840400qkmlR8Fiir2rsL6RcfzZH2DdZau84E9Od8yAQwlv5o 9Yb6BTGOc2i39vMDvQU+AmReekmVLQ29Xv4E5aCVLUOtBxY1tqMlZX70= X-Google-Smtp-Source: AGHT+IG+hX/nkQHNo0Tdit+5GFmsZVeaz/sIn3+i4nTuPkWFdoGtiblQ4CXPDz1cAr87QznsVdqSxEb17HUqjSilEyQHcCvi822U Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1c4c:b0:375:acd3:31b3 with SMTP id e9e14a558f8ab-3a08461c41fmr35577165ab.5.1726169942588; Thu, 12 Sep 2024 12:39:02 -0700 (PDT) Date: Thu, 12 Sep 2024 12:39:02 -0700 In-Reply-To: <20240912184649.92658-1-djahchankoike@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004011130621f14260@google.com> Subject: Re: [syzbot] [usb?] KMSAN: kernel-infoleak in iowarrior_read From: syzbot To: djahchankoike@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:327 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:837 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+0xea7/0x14d0 kernel/workqueue.c:3389 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 ffff888012770800 Data copied to user address 0000000020000000 CPU: 1 UID: 0 PID: 6152 Comm: syz.0.23 Not tainted 6.11.0-rc7-syzkaller-g77f587896757-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 ===================================================== Tested on: commit: 77f58789 Merge tag 'arm-fixes-6.11-3' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16327100580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ea008021530b2de3 dashboard link: https://syzkaller.appspot.com/bug?extid=b8080cbc8d286a5fa23a compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=154e149f980000