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Message-ID: <CAHp75Vc=Y5aS8hbynHu9WxF6uy9Na+icaUunbhqGzV_FF-0R5g@mail.gmail.com>
Date: Fri, 12 Mar 2021 10:55:48 +0200
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: Tong Zhang <ztong0001@...il.com>
Cc: Giovanni Cabiddu <giovanni.cabiddu@...el.com>,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>,
Wojciech Ziemba <wojciech.ziemba@...el.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Fiona Trahe <fiona.trahe@...el.com>, qat-linux@...el.com,
linux-crypto <linux-crypto@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] crypto: qat: ADF_STATUS_PF_RUNNING should be set
after adf_dev_init
On Fri, Mar 12, 2021 at 9:50 AM Tong Zhang <ztong0001@...il.com> wrote:
>
> ADF_STATUS_PF_RUNNING is (only) used and checked by adf_vf2pf_shutdown()
> before calling adf_iov_putmsg()->mutex_lock(vf2pf_lock), however the
> vf2pf_lock is initialized in adf_dev_init(), which can fail and when it
> fail, the vf2pf_lock is either not initialized or destroyed, a subsequent
> use of vf2pf_lock will cause issue.
> To fix this issue, only set this flag if adf_dev_init() returns 0.
Makes sense, but please leave only ~2-3 (significant) lines from the
below noisy dump
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
(after making commit message neat)
> [ 7.178008] ==================================================================
> [ 7.178404] BUG: KASAN: user-memory-access in __mutex_lock.isra.0+0x1ac/0x7c0
> [ 7.178800] Read of size 4 at addr 000000000000f434 by task modprobe/96
> [ 7.179169]
> [ 7.179257] CPU: 0 PID: 96 Comm: modprobe Not tainted 5.12.0-rc2-00338-gf78d76e72a46-dirty #86
> [ 7.179730] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-48-gd9c812dda519-4
> [ 7.180345] Call Trace:
> [ 7.180485] dump_stack+0x8a/0xb5
> [ 7.180676] kasan_report.cold+0x10f/0x111
> [ 7.180907] ? __mutex_lock.isra.0+0x1ac/0x7c0
> [ 7.181156] __mutex_lock.isra.0+0x1ac/0x7c0
> [ 7.181394] ? finish_task_switch+0x12f/0x360
> [ 7.181640] ? __switch_to+0x339/0x6b0
> [ 7.181852] ? ww_mutex_lock_interruptible+0x150/0x150
> [ 7.182138] ? __sched_text_start+0x8/0x8
> [ 7.182363] ? vprintk_emit+0x91/0x170
> [ 7.182576] mutex_lock+0xc9/0xd0
> [ 7.182765] ? __mutex_lock_slowpath+0x10/0x10
> [ 7.183016] ? swsusp_write.cold+0x208/0x208
> [ 7.183257] adf_iov_putmsg+0x118/0x1a0 [intel_qat]
> [ 7.183541] adf_vf2pf_shutdown+0x4d/0x7b [intel_qat]
> [ 7.183834] adf_dev_shutdown+0x172/0x2b0 [intel_qat]
> [ 7.184127] adf_probe+0x5e9/0x600 [qat_dh895xccvf]
> [ 7.184403] ? adf_remove+0x70/0x70 [qat_dh895xccvf]
> [ 7.184681] ? _raw_spin_lock_irqsave+0x7b/0xd0
> [ 7.184936] ? _raw_spin_unlock_irqrestore+0xd/0x20
> [ 7.185209] ? adf_remove+0x70/0x70 [qat_dh895xccvf]
> [ 7.185489] local_pci_probe+0x6f/0xb0
> [ 7.185702] pci_device_probe+0x1e9/0x2f0
> [ 7.185928] ? pci_device_remove+0xf0/0xf0
> [ 7.186159] ? sysfs_do_create_link_sd.isra.0+0x76/0xe0
> [ 7.186458] really_probe+0x161/0x420
> [ 7.186665] driver_probe_device+0x6d/0xd0
> [ 7.186894] device_driver_attach+0x82/0x90
> [ 7.187131] ? device_driver_attach+0x90/0x90
> [ 7.187375] __driver_attach+0x60/0x100
> [ 7.187591] ? device_driver_attach+0x90/0x90
> [ 7.187835] bus_for_each_dev+0xe1/0x140
> [ 7.188057] ? subsys_dev_iter_exit+0x10/0x10
> [ 7.188302] ? klist_node_init+0x61/0x80
> [ 7.188524] bus_add_driver+0x254/0x2a0
> [ 7.188740] driver_register+0xd3/0x150
> [ 7.188956] ? 0xffffffffc0050000
> [ 7.189143] adfdrv_init+0x2b/0x1000 [qat_dh895xccvf]
> [ 7.189427] do_one_initcall+0x84/0x250
> [ 7.189644] ? trace_event_raw_event_initcall_finish+0x150/0x150
> [ 7.189977] ? _raw_spin_unlock_irqrestore+0xd/0x20
> [ 7.190250] ? create_object+0x395/0x510
> [ 7.190472] ? kasan_unpoison+0x21/0x50
> [ 7.190689] do_init_module+0xf8/0x350
> [ 7.190901] load_module+0x40c5/0x4410
> [ 7.191121] ? module_frob_arch_sections+0x20/0x20
> [ 7.191390] ? kernel_read_file+0x1cd/0x3e0
> [ 7.191626] ? __do_sys_finit_module+0x108/0x170
> [ 7.191885] __do_sys_finit_module+0x108/0x170
> [ 7.192134] ? __ia32_sys_init_module+0x40/0x40
> [ 7.192389] ? file_open_root+0x200/0x200
> [ 7.192615] ? do_sys_open+0x85/0xe0
> [ 7.192817] ? filp_open+0x50/0x50
> [ 7.193010] ? exit_to_user_mode_prepare+0xfc/0x130
> [ 7.193283] do_syscall_64+0x33/0x40
> [ 7.193486] entry_SYSCALL_64_after_hwframe+0x44/0xae
> [ 7.193770] RIP: 0033:0x7f6ad21b4cf7
> [ 7.193971] Code: 48 89 57 30 48 8b 04 24 48 89 47 38 e9 1d a0 02 00 48 89 f8 48 89 f7 48 89 d6 41
> [ 7.194991] RSP: 002b:00007ffe2a5d9028 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
> [ 7.195408] RAX: ffffffffffffffda RBX: 0000000000882a70 RCX: 00007f6ad21b4cf7
> [ 7.195801] RDX: 0000000000000000 RSI: 00000000008819e0 RDI: 0000000000000003
> [ 7.196193] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
> [ 7.196588] R10: 00007f6ad2218300 R11: 0000000000000246 R12: 00000000008819e0
> [ 7.196979] R13: 0000000000000000 R14: 0000000000881dd0 R15: 0000000000000001
> [ 7.197372] ==================================================================
>
> Signed-off-by: Tong Zhang <ztong0001@...il.com>
> ---
> drivers/crypto/qat/qat_c3xxxvf/adf_drv.c | 4 ++--
> drivers/crypto/qat/qat_c62xvf/adf_drv.c | 4 ++--
> drivers/crypto/qat/qat_dh895xccvf/adf_drv.c | 4 ++--
> 3 files changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/crypto/qat/qat_c3xxxvf/adf_drv.c b/drivers/crypto/qat/qat_c3xxxvf/adf_drv.c
> index 1d1532e8fb6d..067ca5e17d38 100644
> --- a/drivers/crypto/qat/qat_c3xxxvf/adf_drv.c
> +++ b/drivers/crypto/qat/qat_c3xxxvf/adf_drv.c
> @@ -184,12 +184,12 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> if (ret)
> goto out_err_free_reg;
>
> - set_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status);
> -
> ret = adf_dev_init(accel_dev);
> if (ret)
> goto out_err_dev_shutdown;
>
> + set_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status);
> +
> ret = adf_dev_start(accel_dev);
> if (ret)
> goto out_err_dev_stop;
> diff --git a/drivers/crypto/qat/qat_c62xvf/adf_drv.c b/drivers/crypto/qat/qat_c62xvf/adf_drv.c
> index 04742a6d91ca..51ea88c0b17d 100644
> --- a/drivers/crypto/qat/qat_c62xvf/adf_drv.c
> +++ b/drivers/crypto/qat/qat_c62xvf/adf_drv.c
> @@ -184,12 +184,12 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> if (ret)
> goto out_err_free_reg;
>
> - set_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status);
> -
> ret = adf_dev_init(accel_dev);
> if (ret)
> goto out_err_dev_shutdown;
>
> + set_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status);
> +
> ret = adf_dev_start(accel_dev);
> if (ret)
> goto out_err_dev_stop;
> diff --git a/drivers/crypto/qat/qat_dh895xccvf/adf_drv.c b/drivers/crypto/qat/qat_dh895xccvf/adf_drv.c
> index c972554a755e..29999da716cc 100644
> --- a/drivers/crypto/qat/qat_dh895xccvf/adf_drv.c
> +++ b/drivers/crypto/qat/qat_dh895xccvf/adf_drv.c
> @@ -184,12 +184,12 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> if (ret)
> goto out_err_free_reg;
>
> - set_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status);
> -
> ret = adf_dev_init(accel_dev);
> if (ret)
> goto out_err_dev_shutdown;
>
> + set_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status);
> +
> ret = adf_dev_start(accel_dev);
> if (ret)
> goto out_err_dev_stop;
> --
> 2.25.1
>
--
With Best Regards,
Andy Shevchenko
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