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b=IP5HH1i+aHmDhnGYoA3kECb5Zt79YVeLmMZwy/PUzBQQm48/Qgf3Pb5NyzOcrmVgn FUIKyk8nfqXS6+APN1e80RJ7aWvTPza/SGyXLD+F/6vD9D9ggqt7D4e/+1ky2lrKY4 7BR9MXfAAzYEysYRLV00cgF58491jpMBqNXg9Q4Y= Received: from pek-lxu-l1.wrs.com ([111.198.228.153]) by newxmesmtplogicsvrszc5-2.qq.com (NewEsmtp) with SMTP id 7EF29854; Tue, 30 Apr 2024 17:31:47 +0800 X-QQ-mid: xmsmtpt1714469507t94g3cd0w Message-ID: X-QQ-XMAILINFO: N+bThp2B+LIxQ3WebrxRv9uyBrNb1R/uJqRNy/xC9KgJ24jrMuaSUEE1vzWqTF /W22NtAswJo6LcbthliuhkaAhYyBF59tFA08xRejB+09ghOvDcE7q2ew6LCSL9iN05+TouhD3jA6 4a9Q4L3zXWSvUPigKxJ7qbpTxTKa35+CljNl2AQwOlYvfA//q+9qj+w44sx3fbD7V+Iy8juXXtt/ DkFvhJQJTN+mNd5BFF0UT260ZrT3k7q56UbPAMMpBj+/ZmdN71STqGp31bUYbkO2gWe8ptISIwQV razorMFiNSokKdI/0VqlHLCgSQKGw9sXt1gxQG/QBSTAihJprOHfIFhJW49ZhOtj26gb3afct3TM MRk4IAujVYg24PdK18wY9VZZwouckB5AlNffGJizt2n5ew1FCapI8afmGLnOnxhZF29JuwburNwF s36H2rWvSh+aT2rVfn2Gr6eQKj0BhYSbFEio/iLTFIbUzJ33vqeH9ldzJCpeRZcMYb1zNMsByTaD xX5ezAu/Y1l0zD/nTINEl1zxBtPr3Z9wuWof9oZigXPUIEQ1ffisOPG+TnM07/fsT1Juo4rpUmm6 Heyu5NZIFD+btdkYRErHqVuBnql2fzTMeU9AW2s46P8xoG0o5j0Ly3U7pqQE3CNWLWq//UEVi0YR k1zswyePG9VcaHnv/XyXN2Dro1vjLaekANsH0ugyTIalDTqIhIZdHfvIzQv8ElvxKpLYlMTAe/GX 8eISl8cZKkCxwoFTjUTjLiNFpEqOZ9B8LRFK3ERT7Itp7RazhDRG0KgP3MA30Kk4iV8IEkF8zNPi YBBuiOOBg929Z+lzJhL80gl8Q134bWcqo8T3ZgZ/mqq6vkJrmQulLnrduOyn0U1k8QeBq+UB8JL4 GogLuXGC0zaKwJkKrbYdn1h2x1Ptm6JEwVrHxk0d7N7QrF/QjgS6krBIT9QhCoXQ+dCItD/Z9eZD mpbd+UcBI= X-QQ-XMRINFO: OD9hHCdaPRBwq3WW+NvGbIU= From: Edward Adam Davis To: syzbot+98edc2df894917b3431f@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [net?] [virt?] [kvm?] KASAN: slab-use-after-free Read in vhost_task_fn Date: Tue, 30 Apr 2024 17:31:47 +0800 X-OQ-MSGID: <20240430093146.810849-2-eadavis@qq.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <000000000000a9613006174c1c4c@google.com> References: <000000000000a9613006174c1c4c@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit please test uaf in vhost_task_fn #syz test https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git bb7a2467e6be diff --git a/kernel/vhost_task.c b/kernel/vhost_task.c index 48c289947b99..8800f5acc007 100644 --- a/kernel/vhost_task.c +++ b/kernel/vhost_task.c @@ -61,8 +61,8 @@ static int vhost_task_fn(void *data) set_bit(VHOST_TASK_FLAGS_KILLED, &vtsk->flags); vtsk->handle_sigkill(vtsk->data); } - complete(&vtsk->exited); mutex_unlock(&vtsk->exit_mutex); + complete(&vtsk->exited); do_exit(0); }