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b=rpav7tHitrh9EUWJV/5k7JUC+VBtj2ZkSyC1tQQEMnhi3teZLz6H86GH+xT5ZprHw8 P2qNGsHp9aFwChuxb4XMCmTt1TPR5PNK3P1DIKpPqyD28hjSbuiSIiKYN9pLb2iCgwn2 y3wfW/94zIIkO+KMsoMD60THpKQ+WVIW3mfz9L2mUW6wCZTLhAwRc2zOk0ozUkWZ1a/W JALI2hWwuvnF8Ed5QPafb2cId2ZI8rkTDq05CWy9b5ij9o1OUDeEdXefwrT45R8w4JZj tIbAbgcufZ8QVIOeoX4oJWBkhHIEg07uXrzimBD8hLVuLet+jCK69dVhOA5UVMDz1R5y TOkQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=CcJ+dgaUDfjLkwqWraTCCduPX2umj8stLjLabUcd7zU=; b=nqQ3AMXNNxFaz70jpjt8XrS9GFUswfLcwhN/R/h2KwtSitCPfBqO9Iy+LW2QXzGtk6 nIF68TsXu6I2BNLl9aa/2eUSrgGs7iDDv4l0sXNh/CiKYqtqT4LP/d+QEb3AfcKR5NL5 2fkx7nv1wCkO9zx4ajtXh9cZ28Ky0rVtP8HxK4MnjNocUrq8tojMsjmt0pY3DJFuVCHD OKv/TOJExn3vKBhJkYbFjx2ws4OZzRhZ7FjMkkLeHDvwUXMB4K/1VvLJMYDEqh3VOwFk gsv4HYhnvS2bRoVPr5PhPr9VQN2Gju+EPA4ahJhu4FovY1tHpOXPqAW50hlc86h3Tlhw w5XA== X-Gm-Message-State: ANhLgQ3a14qPoqn+u38NZ9etjGJGt80GAtTO6m/Qr9ngaGonZAYhQ8kc 1i4uFtglGRYLorTF2SmpnRowfCKbHHc2sNLs8zQkuBLptVA= X-Google-Smtp-Source: ADFU+vslS8cZ6IVTuDoY86C3OGQnP06QywUPutDqc9cxoBuxRkthUJ35Gutxiplfln0dy6RtbQUrNjcKAtOdXlkkWN8= X-Received: by 2002:a05:6102:a01:: with SMTP id t1mr5218399vsa.108.1585191144495; Wed, 25 Mar 2020 19:52:24 -0700 (PDT) MIME-Version: 1.0 References: <0000000000006678a105a184ecb7@google.com> In-Reply-To: <0000000000006678a105a184ecb7@google.com> From: Qiujun Huang Date: Thu, 26 Mar 2020 10:52:11 +0800 Message-ID: Subject: Re: KASAN: use-after-free Read in hfa384x_usbin_callback To: syzbot Content-Type: multipart/mixed; boundary="00000000000011ec7405a1b913c7" X-BeenThere: driverdev-devel@linuxdriverproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Driver Project Developer List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devel@driverdev.osuosl.org, Andrey Konovalov , linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com, linux-kernel@vger.kernel.org, nishkadg.linux@gmail.com, Greg KH , osdevtc@gmail.com Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" --00000000000011ec7405a1b913c7 Content-Type: text/plain; charset="UTF-8" #syz test: https://github.com/google/kasan.git e17994d1 On Mon, Mar 23, 2020 at 8:39 PM syzbot wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: e17994d1 usb: core: kcov: collect coverage from usb comple.. > git tree: https://github.com/google/kasan.git usb-fuzzer > console output: https://syzkaller.appspot.com/x/log.txt?x=15217373e00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=5d64370c438bc60 > dashboard link: https://syzkaller.appspot.com/bug?extid=a57b24d359dc5577634a > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14a720ade00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1467b755e00000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+a57b24d359dc5577634a@syzkaller.appspotmail.com > > ================================================================== > BUG: KASAN: use-after-free in memcpy include/linux/string.h:381 [inline] > BUG: KASAN: use-after-free in skb_put_data include/linux/skbuff.h:2284 [inline] > BUG: KASAN: use-after-free in hfa384x_int_rxmonitor drivers/staging/wlan-ng/hfa384x_usb.c:3412 [inline] > BUG: KASAN: use-after-free in hfa384x_usbin_rx drivers/staging/wlan-ng/hfa384x_usb.c:3312 [inline] > BUG: KASAN: use-after-free in hfa384x_usbin_callback+0x1993/0x2360 drivers/staging/wlan-ng/hfa384x_usb.c:3026 > Read of size 34945 at addr ffff8881cda9f33c by task swapper/0/0 > > CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc5-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Call Trace: > > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0xef/0x16e lib/dump_stack.c:118 > print_address_description.constprop.0.cold+0xd3/0x314 mm/kasan/report.c:374 > __kasan_report.cold+0x37/0x77 mm/kasan/report.c:506 > kasan_report+0xe/0x20 mm/kasan/common.c:641 > check_memory_region_inline mm/kasan/generic.c:185 [inline] > check_memory_region+0x152/0x1c0 mm/kasan/generic.c:192 > memcpy+0x20/0x50 mm/kasan/common.c:127 > memcpy include/linux/string.h:381 [inline] > skb_put_data include/linux/skbuff.h:2284 [inline] > hfa384x_int_rxmonitor drivers/staging/wlan-ng/hfa384x_usb.c:3412 [inline] > hfa384x_usbin_rx drivers/staging/wlan-ng/hfa384x_usb.c:3312 [inline] > hfa384x_usbin_callback+0x1993/0x2360 drivers/staging/wlan-ng/hfa384x_usb.c:3026 > __usb_hcd_giveback_urb+0x29a/0x550 drivers/usb/core/hcd.c:1650 > usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1716 > dummy_timer+0x1258/0x32ae drivers/usb/gadget/udc/dummy_hcd.c:1966 > call_timer_fn+0x195/0x6f0 kernel/time/timer.c:1404 > expire_timers kernel/time/timer.c:1449 [inline] > __run_timers kernel/time/timer.c:1773 [inline] > __run_timers kernel/time/timer.c:1740 [inline] > run_timer_softirq+0x5f9/0x1500 kernel/time/timer.c:1786 > __do_softirq+0x21e/0x950 kernel/softirq.c:292 > invoke_softirq kernel/softirq.c:373 [inline] > irq_exit+0x178/0x1a0 kernel/softirq.c:413 > exiting_irq arch/x86/include/asm/apic.h:546 [inline] > smp_apic_timer_interrupt+0x141/0x540 arch/x86/kernel/apic/apic.c:1146 > apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 > > RIP: 0010:default_idle+0x28/0x300 arch/x86/kernel/process.c:696 > Code: cc cc 41 56 41 55 65 44 8b 2d 44 77 72 7a 41 54 55 53 0f 1f 44 00 00 e8 b6 62 b5 fb e9 07 00 00 00 0f 00 2d ea 0c 53 00 fb f4 <65> 44 8b 2d 20 77 72 7a 0f 1f 44 00 00 5b 5d 41 5c 41 5d 41 5e c3 > RSP: 0018:ffffffff87007d80 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 > RAX: 0000000000000007 RBX: ffffffff8702cc40 RCX: 0000000000000000 > RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffffff8702d48c > RBP: fffffbfff0e05988 R08: ffffffff8702cc40 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 > R13: 0000000000000000 R14: ffffffff87e607c0 R15: 0000000000000000 > cpuidle_idle_call kernel/sched/idle.c:154 [inline] > do_idle+0x3e0/0x500 kernel/sched/idle.c:269 > cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361 > start_kernel+0xe16/0xe5a init/main.c:998 > secondary_startup_64+0xb6/0xc0 arch/x86/kernel/head_64.S:242 > > The buggy address belongs to the page: > page:ffffea000736a600 refcount:32769 mapcount:0 mapping:0000000000000000 index:0x0 compound_mapcount: 0 > flags: 0x200000000010000(head) > raw: 0200000000010000 dead000000000100 dead000000000122 0000000000000000 > raw: 0000000000000000 0000000000000000 00008001ffffffff 0000000000000000 > page dumped because: kasan: bad access detected > > Memory state around the buggy address: > ffff8881cda9ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ffff8881cda9ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > >ffff8881cdaa0000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ^ > ffff8881cdaa0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff8881cdaa0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ================================================================== > > > --- > This bug 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 bug report. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > syzbot can test patches for this bug, for details see: > https://goo.gl/tpsmEJ#testing-patches --00000000000011ec7405a1b913c7 Content-Type: application/octet-stream; name="0002-staging-wlan-ng-fix-use-after-free-Read-in-hfa384x_u.patch" Content-Disposition: attachment; filename="0002-staging-wlan-ng-fix-use-after-free-Read-in-hfa384x_u.patch" Content-Transfer-Encoding: base64 Content-ID: X-Attachment-Id: f_k885v8dr0 RnJvbSAzMGY1ZjIxODJkNTYyYjYwYzM1ZGY2NDgzYzkyYzFiZjYyZWQwZWM4IE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBRaXVqdW4gSHVhbmcgPGhxamFnYWluQGdtYWlsLmNvbT4KRGF0 ZTogVGh1LCAyNiBNYXIgMjAyMCAxMDoxNDoxMiArMDgwMApTdWJqZWN0OiBbUEFUQ0ggMi8yXSBz dGFnaW5nOiB3bGFuLW5nOiBmaXggdXNlLWFmdGVyLWZyZWUgUmVhZCBpbgogaGZhMzg0eF91c2Jp bl9jYWxsYmFjawoKQmVjYXVzZSB0aGUgc2l6ZSBvZiByeGZybS0+ZGF0YSBpcyBXTEFOX0RBVEFf TUFYTEVOKDIzMTIpLHNvIHNrYmxlbgpjYW4ndCBiZSBtb3JlIHRoYW4gdGhhdC4KClNpZ25lZC1v ZmYtYnk6IFFpdWp1biBIdWFuZyA8aHFqYWdhaW5AZ21haWwuY29tPgotLS0KIGRyaXZlcnMvc3Rh Z2luZy93bGFuLW5nL2hmYTM4NHhfdXNiLmMgfCAyICsrCiAxIGZpbGUgY2hhbmdlZCwgMiBpbnNl cnRpb25zKCspCiBtb2RlIGNoYW5nZSAxMDA2NDQgPT4gMTAwNzU1IGRyaXZlcnMvc3RhZ2luZy93 bGFuLW5nL2hmYTM4NHhfdXNiLmMKCmRpZmYgLS1naXQgYS9kcml2ZXJzL3N0YWdpbmcvd2xhbi1u Zy9oZmEzODR4X3VzYi5jIGIvZHJpdmVycy9zdGFnaW5nL3dsYW4tbmcvaGZhMzg0eF91c2IuYwpv bGQgbW9kZSAxMDA2NDQKbmV3IG1vZGUgMTAwNzU1CmluZGV4IGI3MTc1NmFiMDM5NC4uN2ZlNjRm Y2QzODVkCi0tLSBhL2RyaXZlcnMvc3RhZ2luZy93bGFuLW5nL2hmYTM4NHhfdXNiLmMKKysrIGIv ZHJpdmVycy9zdGFnaW5nL3dsYW4tbmcvaGZhMzg0eF91c2IuYwpAQCAtMzM3Miw2ICszMzcyLDgg QEAgc3RhdGljIHZvaWQgaGZhMzg0eF9pbnRfcnhtb25pdG9yKHN0cnVjdCB3bGFuZGV2aWNlICp3 bGFuZGV2LAogCSAgICAgV0xBTl9IRFJfQTRfTEVOICsgV0xBTl9EQVRBX01BWExFTiArIFdMQU5f Q1JDX0xFTikpIHsKIAkJcHJfZGVidWcoIm92ZXJsZW4gZnJtOiBsZW49JXpkXG4iLAogCQkJIHNr YmxlbiAtIHNpemVvZihzdHJ1Y3QgcDgwMjExX2NhcGhkcikpOworCisJCXJldHVybjsKIAl9CiAK IAlza2IgPSBkZXZfYWxsb2Nfc2tiKHNrYmxlbik7Ci0tIAoyLjE3LjEKCg== --00000000000011ec7405a1b913c7 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ devel mailing list devel@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel --00000000000011ec7405a1b913c7--