From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Sean Young <sean@mess.org>,
Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Subject: [PATCH 4.4 28/56] media: tm6000: double free if usb disconnect while streaming
Date: Fri, 20 Sep 2019 00:04:09 +0200 [thread overview]
Message-ID: <20190919214755.955913118@linuxfoundation.org> (raw)
In-Reply-To: <20190919214742.483643642@linuxfoundation.org>
From: Sean Young <sean@mess.org>
commit 699bf94114151aae4dceb2d9dbf1a6312839dcae upstream.
The usb_bulk_urb will kfree'd on disconnect, so ensure the pointer is set
to NULL after each free.
stop stream
urb killing
urb buffer free
tm6000: got start feed request tm6000_start_feed
tm6000: got start stream request tm6000_start_stream
tm6000: pipe reset
tm6000: got start feed request tm6000_start_feed
tm6000: got start feed request tm6000_start_feed
tm6000: got start feed request tm6000_start_feed
tm6000: got start feed request tm6000_start_feed
tm6000: IR URB failure: status: -71, length 0
xhci_hcd 0000:00:14.0: ERROR unknown event type 37
xhci_hcd 0000:00:14.0: ERROR unknown event type 37
tm6000: error tm6000_urb_received
usb 1-2: USB disconnect, device number 5
tm6000: disconnecting tm6000 #0
==================================================================
BUG: KASAN: use-after-free in dvb_fini+0x75/0x140 [tm6000_dvb]
Read of size 8 at addr ffff888241044060 by task kworker/2:0/22
CPU: 2 PID: 22 Comm: kworker/2:0 Tainted: G W 5.3.0-rc4+ #1
Hardware name: LENOVO 20KHCTO1WW/20KHCTO1WW, BIOS N23ET65W (1.40 ) 07/02/2019
Workqueue: usb_hub_wq hub_event
Call Trace:
dump_stack+0x9a/0xf0
print_address_description.cold+0xae/0x34f
__kasan_report.cold+0x75/0x93
? tm6000_fillbuf+0x390/0x3c0 [tm6000_alsa]
? dvb_fini+0x75/0x140 [tm6000_dvb]
kasan_report+0xe/0x12
dvb_fini+0x75/0x140 [tm6000_dvb]
tm6000_close_extension+0x51/0x80 [tm6000]
tm6000_usb_disconnect.cold+0xd4/0x105 [tm6000]
usb_unbind_interface+0xe4/0x390
device_release_driver_internal+0x121/0x250
bus_remove_device+0x197/0x260
device_del+0x268/0x550
? __device_links_no_driver+0xd0/0xd0
? usb_remove_ep_devs+0x30/0x3b
usb_disable_device+0x122/0x400
usb_disconnect+0x153/0x430
hub_event+0x800/0x1e40
? trace_hardirqs_on_thunk+0x1a/0x20
? hub_port_debounce+0x1f0/0x1f0
? retint_kernel+0x10/0x10
? lock_is_held_type+0xf1/0x130
? hub_port_debounce+0x1f0/0x1f0
? process_one_work+0x4ae/0xa00
process_one_work+0x4ba/0xa00
? pwq_dec_nr_in_flight+0x160/0x160
? do_raw_spin_lock+0x10a/0x1d0
worker_thread+0x7a/0x5c0
? process_one_work+0xa00/0xa00
kthread+0x1d5/0x200
? kthread_create_worker_on_cpu+0xd0/0xd0
ret_from_fork+0x3a/0x50
Allocated by task 2682:
save_stack+0x1b/0x80
__kasan_kmalloc.constprop.0+0xc2/0xd0
usb_alloc_urb+0x28/0x60
tm6000_start_feed+0x10a/0x300 [tm6000_dvb]
dmx_ts_feed_start_filtering+0x86/0x120 [dvb_core]
dvb_dmxdev_start_feed+0x121/0x180 [dvb_core]
dvb_dmxdev_filter_start+0xcb/0x540 [dvb_core]
dvb_demux_do_ioctl+0x7ed/0x890 [dvb_core]
dvb_usercopy+0x97/0x1f0 [dvb_core]
dvb_demux_ioctl+0x11/0x20 [dvb_core]
do_vfs_ioctl+0x5d8/0x9d0
ksys_ioctl+0x5e/0x90
__x64_sys_ioctl+0x3d/0x50
do_syscall_64+0x74/0xe0
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 22:
save_stack+0x1b/0x80
__kasan_slab_free+0x12c/0x170
kfree+0xfd/0x3a0
xhci_giveback_urb_in_irq+0xfe/0x230
xhci_td_cleanup+0x276/0x340
xhci_irq+0x1129/0x3720
__handle_irq_event_percpu+0x6e/0x420
handle_irq_event_percpu+0x6f/0x100
handle_irq_event+0x55/0x84
handle_edge_irq+0x108/0x3b0
handle_irq+0x2e/0x40
do_IRQ+0x83/0x1a0
Cc: stable@vger.kernel.org
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/media/usb/tm6000/tm6000-dvb.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/media/usb/tm6000/tm6000-dvb.c
+++ b/drivers/media/usb/tm6000/tm6000-dvb.c
@@ -111,6 +111,7 @@ static void tm6000_urb_received(struct u
printk(KERN_ERR "tm6000: error %s\n", __func__);
kfree(urb->transfer_buffer);
usb_free_urb(urb);
+ dev->dvb->bulk_urb = NULL;
}
}
}
@@ -143,6 +144,7 @@ static int tm6000_start_stream(struct tm
dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
if (dvb->bulk_urb->transfer_buffer == NULL) {
usb_free_urb(dvb->bulk_urb);
+ dvb->bulk_urb = NULL;
printk(KERN_ERR "tm6000: couldn't allocate transfer buffer!\n");
return -ENOMEM;
}
@@ -170,6 +172,7 @@ static int tm6000_start_stream(struct tm
kfree(dvb->bulk_urb->transfer_buffer);
usb_free_urb(dvb->bulk_urb);
+ dvb->bulk_urb = NULL;
return ret;
}
next prev parent reply other threads:[~2019-09-19 22:22 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-19 22:03 [PATCH 4.4 00/56] 4.4.194-stable review Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 01/56] bridge/mdb: remove wrong use of NLM_F_MULTI Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 02/56] cdc_ether: fix rndis support for Mediatek based smartphones Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 03/56] ipv6: Fix the link time qualifier of ping_v6_proc_exit_net() Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 04/56] isdn/capi: check message length in capi_write() Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 05/56] net: Fix null de-reference of device refcount Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 06/56] sch_hhf: ensure quantum and hhf_non_hh_weight are non-zero Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 07/56] sctp: Fix the link time qualifier of sctp_ctrlsock_exit() Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 08/56] sctp: use transport pf_retrans in sctp_do_8_2_transport_strike Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 09/56] tcp: fix tcp_ecn_withdraw_cwr() to clear TCP_ECN_QUEUE_CWR Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 10/56] tipc: add NULL pointer check before calling kfree_rcu Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 11/56] tun: fix use-after-free when register netdev failed Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 12/56] Revert "MIPS: SiByte: Enable swiotlb for SWARM, LittleSur and BigSur" Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 13/56] Btrfs: fix assertion failure during fsync and use of stale transaction Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 14/56] genirq: Prevent NULL pointer dereference in resend_irqs() Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 15/56] KVM: s390: Do not leak kernel stack data in the KVM_S390_INTERRUPT ioctl Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 16/56] KVM: x86: work around leak of uninitialized stack contents Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 17/56] KVM: nVMX: handle page fault in vmread Greg Kroah-Hartman
2019-09-19 22:03 ` [PATCH 4.4 18/56] MIPS: VDSO: Prevent use of smp_processor_id() Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 19/56] MIPS: VDSO: Use same -m%-float cflag as the kernel proper Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 20/56] clk: rockchip: Dont yell about bad mmc phases when getting Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 21/56] driver core: Fix use-after-free and double free on glue directory Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 22/56] crypto: talitos - check AES key size Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 23/56] crypto: talitos - check data blocksize in ablkcipher Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 24/56] x86/build: Add -Wnoaddress-of-packed-member to REALMODE_CFLAGS, to silence GCC9 build warning Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 25/56] MIPS: netlogic: xlr: Remove erroneous check in nlm_fmn_send() Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 26/56] ARC: configs: Remove CONFIG_INITRAMFS_SOURCE from defconfigs Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 27/56] USB: usbcore: Fix slab-out-of-bounds bug during device reset Greg Kroah-Hartman
2019-09-19 22:04 ` Greg Kroah-Hartman [this message]
2019-09-19 22:04 ` [PATCH 4.4 29/56] x86/boot: Add missing bootparam that breaks boot on some platforms Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 30/56] xen-netfront: do not assume sk_buff_head list is empty in error handling Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 31/56] KVM: coalesced_mmio: add bounds checking Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 32/56] serial: sprd: correct the wrong sequence of arguments Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 33/56] tty/serial: atmel: reschedule TX after RX was started Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 34/56] mwifiex: Fix three heap overflow at parsing element in cfg80211_ap_settings Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 35/56] s390/bpf: fix lcgr instruction encoding Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 36/56] ARM: OMAP2+: Fix omap4 errata warning on other SoCs Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 37/56] s390/bpf: use 32-bit index for tail calls Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 38/56] NFSv4: Fix return values for nfs4_file_open() Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 39/56] NFS: Fix initialisation of I/O result struct in nfs_pgio_rpcsetup Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 40/56] Kconfig: Fix the reference to the IDT77105 Phy driver in the description of ATM_NICSTAR_USE_IDT77105 Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 41/56] ARM: 8874/1: mm: only adjust sections of valid mm structures Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 42/56] r8152: Set memory to all 0xFFs on failed reg reads Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 43/56] x86/apic: Fix arch_dynirq_lower_bound() bug for DT enabled machines Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 44/56] netfilter: nf_conntrack_ftp: Fix debug output Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 45/56] NFSv2: Fix eof handling Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 46/56] NFSv2: Fix write regression Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 47/56] cifs: set domainName when a domain-key is used in multiuser Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 48/56] cifs: Use kzfree() to zero out the password Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 49/56] sky2: Disable MSI on yet another ASUS boards (P6Xxxx) Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 50/56] tools/power turbostat: fix buffer overrun Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 51/56] net: seeq: Fix the function used to release some memory in an error handling path Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 52/56] dmaengine: ti: omap-dma: Add cleanup in omap_dma_probe() Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 53/56] keys: Fix missing null pointer check in request_key_auth_describe() Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 54/56] floppy: fix usercopy direction Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 55/56] media: technisat-usb2: break out of loop at end of buffer Greg Kroah-Hartman
2019-09-19 22:04 ` [PATCH 4.4 56/56] ARC: export "abort" for modules Greg Kroah-Hartman
2019-09-20 4:00 ` [PATCH 4.4 00/56] 4.4.194-stable review kernelci.org bot
2019-09-20 13:41 ` Guenter Roeck
2019-09-20 13:47 ` Jon Hunter
2019-09-20 14:35 ` Naresh Kamboju
2019-09-20 21:38 ` shuah
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