From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
"Sjur Brændeland" <sjur.brandeland@stericsson.com>,
"Rusty Russell" <rusty@rustcorp.com.au>
Subject: [ 07/61] virtio_console: Dont access uninitialized data.
Date: Tue, 12 Feb 2013 12:34:27 -0800 [thread overview]
Message-ID: <20130212203419.086361026@linuxfoundation.org> (raw)
In-Reply-To: <20130212203417.890993903@linuxfoundation.org>
3.7-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sjur Brændeland <sjur.brandeland@stericsson.com>
commit aded024a12b32fc1ed9a80639681daae2d07ec25 upstream.
Don't access uninitialized work-queue when removing device.
The work queue is initialized only if the device multi-queue.
So don't call cancel_work unless this is a multi-queue device.
This fixes the following panic:
Kernel panic - not syncing: BUG!
Call Trace:
62031b28: [<6026085d>] panic+0x16b/0x2d3
62031b30: [<6004ef5e>] flush_work+0x0/0x1d7
62031b60: [<602606f2>] panic+0x0/0x2d3
62031b68: [<600333b0>] memcpy+0x0/0x140
62031b80: [<6002d58a>] unblock_signals+0x0/0x84
62031ba0: [<602609c5>] printk+0x0/0xa0
62031bd8: [<60264e51>] __mutex_unlock_slowpath+0x13d/0x148
62031c10: [<6004ef5e>] flush_work+0x0/0x1d7
62031c18: [<60050234>] try_to_grab_pending+0x0/0x17e
62031c38: [<6004e984>] get_work_gcwq+0x71/0x8f
62031c48: [<60050539>] __cancel_work_timer+0x5b/0x115
62031c78: [<628acc85>] unplug_port+0x0/0x191 [virtio_console]
62031c98: [<6005061c>] cancel_work_sync+0x12/0x14
62031ca8: [<628ace96>] virtcons_remove+0x80/0x15c [virtio_console]
62031ce8: [<628191de>] virtio_dev_remove+0x1e/0x7e [virtio]
62031d08: [<601cf242>] __device_release_driver+0x75/0xe4
62031d28: [<601cf2dd>] device_release_driver+0x2c/0x40
62031d48: [<601ce0dd>] driver_unbind+0x7d/0xc6
62031d88: [<601cd5d9>] drv_attr_store+0x27/0x29
62031d98: [<60115f61>] sysfs_write_file+0x100/0x14d
62031df8: [<600b737d>] vfs_write+0xcb/0x184
62031e08: [<600b58b8>] filp_close+0x88/0x94
62031e38: [<600b7686>] sys_write+0x59/0x88
62031e88: [<6001ced1>] handle_syscall+0x5d/0x80
62031ea8: [<60030a74>] userspace+0x405/0x531
62031f08: [<600d32cc>] sys_dup+0x0/0x5e
62031f28: [<601b11d6>] strcpy+0x0/0x18
62031f38: [<600be46c>] do_execve+0x10/0x12
62031f48: [<600184c7>] run_init_process+0x43/0x45
62031fd8: [<60019a91>] new_thread_handler+0xba/0xbc
Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/char/virtio_console.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -1966,7 +1966,8 @@ static void virtcons_remove(struct virti
/* Disable interrupts for vqs */
vdev->config->reset(vdev);
/* Finish up work that's lined up */
- cancel_work_sync(&portdev->control_work);
+ if (use_multiport(portdev))
+ cancel_work_sync(&portdev->control_work);
list_for_each_entry_safe(port, port2, &portdev->ports, list)
unplug_port(port);
next prev parent reply other threads:[~2013-02-12 20:34 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-12 20:34 [ 00/61] 3.7.8-stable review Greg Kroah-Hartman
2013-02-12 20:34 ` [ 01/61] rtlwifi: Fix the usage of the wrong variable in usb.c Greg Kroah-Hartman
2013-02-12 20:34 ` [ 02/61] rtlwifi: Fix scheduling while atomic bug Greg Kroah-Hartman
2013-02-12 20:34 ` [ 03/61] regulator: max8998: fix incorrect min_uV value for ldo10 Greg Kroah-Hartman
2013-02-12 20:34 ` [ 04/61] regulator: clear state each invocation of of_regulator_match Greg Kroah-Hartman
2013-02-12 20:34 ` [ 05/61] regulator: s2mps11: fix incorrect register for buck10 Greg Kroah-Hartman
2013-02-12 20:34 ` [ 06/61] IB/qib: Fix for broken sparse warning fix Greg Kroah-Hartman
2013-02-12 20:34 ` Greg Kroah-Hartman [this message]
2013-02-12 20:34 ` [ 08/61] Bluetooth: Fix handling of unexpected SMP PDUs Greg Kroah-Hartman
2013-02-12 20:34 ` [ 09/61] Revert "iwlwifi: fix the reclaimed packet tracking upon flush queue" Greg Kroah-Hartman
2013-02-12 20:34 ` [ 10/61] can: c_can: Set reserved bit in IFx_MASK2 to 1 on write Greg Kroah-Hartman
2013-02-12 20:34 ` [ 11/61] mwifiex: fix incomplete scan in case of IE parsing error Greg Kroah-Hartman
2013-02-12 20:34 ` [ 12/61] e1000e: enable ECC on I217/I218 to catch packet buffer memory errors Greg Kroah-Hartman
2013-02-12 20:34 ` [ 13/61] media: pwc-if: must check vb2_queue_init() success Greg Kroah-Hartman
2013-02-12 20:34 ` [ 14/61] ath9k_hw: fix calibration issues on chainmask that dont include chain 0 Greg Kroah-Hartman
2013-02-12 20:34 ` [ 15/61] mfd: db8500-prcmu: Fix irqdomain usage Greg Kroah-Hartman
2013-02-12 20:34 ` [ 16/61] dm thin: fix queue limits stacking Greg Kroah-Hartman
2013-02-12 20:34 ` [ 17/61] net: prevent setting ttl=0 via IP_TTL Greg Kroah-Hartman
2013-02-12 20:34 ` [ 18/61] ipv6: fix the noflags test in addrconf_get_prefix_route Greg Kroah-Hartman
2013-02-12 20:34 ` [ 19/61] net, wireless: overwrite default_ethtool_ops Greg Kroah-Hartman
2013-02-12 20:34 ` [ 20/61] tcp: fix a panic on UP machines in reqsk_fastopen_remove Greg Kroah-Hartman
2013-02-12 20:34 ` [ 21/61] MAINTAINERS: Stephen Hemminger email change Greg Kroah-Hartman
2013-02-12 20:34 ` [ 22/61] ipv6: fix header length calculation in ip6_append_data() Greg Kroah-Hartman
2013-02-12 20:34 ` [ 23/61] macvlan: fix macvlan_get_size() Greg Kroah-Hartman
2013-02-12 20:34 ` [ 24/61] net: calxedaxgmac: throw away overrun frames Greg Kroah-Hartman
2013-02-12 20:34 ` [ 25/61] net/mlx4_en: Fix bridged vSwitch configuration for non SRIOV mode Greg Kroah-Hartman
2013-02-12 20:34 ` [ 26/61] net/mlx4_core: Set number of msix vectors under SRIOV mode to firmware defaults Greg Kroah-Hartman
2013-02-12 20:34 ` [ 27/61] tcp: fix incorrect LOCKDROPPEDICMPS counter Greg Kroah-Hartman
2013-02-12 20:34 ` [ 28/61] isdn/gigaset: fix zero size border case in debug dump Greg Kroah-Hartman
2013-02-12 20:34 ` [ 29/61] netxen: fix off by one bug in netxen_release_tx_buffer() Greg Kroah-Hartman
2013-02-12 20:34 ` [ 30/61] r8169: remove the obsolete and incorrect AMD workaround Greg Kroah-Hartman
2013-02-12 20:34 ` [ 31/61] net: loopback: fix a dst refcounting issue Greg Kroah-Hartman
2013-02-12 20:34 ` [ 32/61] IP_GRE: Fix kernel panic in IP_GRE with GRE csum Greg Kroah-Hartman
2013-02-12 20:34 ` [ 33/61] pktgen: correctly handle failures when adding a device Greg Kroah-Hartman
2013-02-12 20:34 ` [ 34/61] ipv6: do not create neighbor entries for local delivery Greg Kroah-Hartman
2013-02-12 20:34 ` [ 35/61] via-rhine: Fix bugs in NAPI support Greg Kroah-Hartman
2013-02-12 20:34 ` [ 36/61] packet: fix leakage of tx_ring memory Greg Kroah-Hartman
2013-02-12 20:34 ` [ 37/61] ipv6/ip6_gre: fix error case handling in ip6gre_tunnel_xmit() Greg Kroah-Hartman
2013-02-12 20:34 ` [ 38/61] atm/iphase: rename fregt_t -> ffreg_t Greg Kroah-Hartman
2013-02-12 20:34 ` [ 39/61] xen/netback: shutdown the ring if it contains garbage Greg Kroah-Hartman
2013-02-12 20:35 ` [ 40/61] xen/netback: dont leak pages on failure in xen_netbk_tx_check_gop Greg Kroah-Hartman
2013-02-12 20:35 ` [ 41/61] xen/netback: free already allocated memory on failure in xen_netbk_get_requests Greg Kroah-Hartman
2013-02-12 20:35 ` [ 42/61] netback: correct netbk_tx_err to handle wrap around Greg Kroah-Hartman
2013-02-12 20:35 ` [ 43/61] ipv4: Remove output route check in ipv4_mtu Greg Kroah-Hartman
2013-02-12 20:35 ` [ 44/61] ipv4: Dont update the pmtu on mtu locked routes Greg Kroah-Hartman
2013-02-12 20:35 ` [ 45/61] ipv6: Add an error handler for icmp6 Greg Kroah-Hartman
2013-02-12 20:35 ` [ 46/61] ipv4: Invalidate the socket cached route on pmtu events if possible Greg Kroah-Hartman
2013-02-12 20:35 ` [ 47/61] ipv4: Add a socket release callback for datagram sockets Greg Kroah-Hartman
2013-02-12 20:35 ` [ 48/61] ipv4: Fix route refcount on pmtu discovery Greg Kroah-Hartman
2013-02-12 20:35 ` [ 49/61] sctp: refactor sctp_outq_teardown to insure proper re-initalization Greg Kroah-Hartman
2013-02-12 20:35 ` [ 50/61] net: sctp: sctp_setsockopt_auth_key: use kzfree instead of kfree Greg Kroah-Hartman
2013-02-12 20:35 ` [ 51/61] net: sctp: sctp_endpoint_free: zero out secret key data Greg Kroah-Hartman
2013-02-12 20:35 ` [ 52/61] tcp: detect SYN/data drop when F-RTO is disabled Greg Kroah-Hartman
2013-02-12 20:35 ` [ 53/61] tcp: fix an infinite loop in tcp_slow_start() Greg Kroah-Hartman
2013-02-12 20:35 ` [ 54/61] tcp: frto should not set snd_cwnd to 0 Greg Kroah-Hartman
2013-02-12 20:35 ` [ 55/61] tcp: fix for zero packets_in_flight was too broad Greg Kroah-Hartman
2013-02-12 20:35 ` [ 56/61] tcp: dont abort splice() after small transfers Greg Kroah-Hartman
2013-02-12 20:35 ` [ 57/61] tcp: splice: fix an infinite loop in tcp_read_sock() Greg Kroah-Hartman
2013-02-12 20:35 ` [ 58/61] tcp: fix splice() and tcp collapsing interaction Greg Kroah-Hartman
2013-02-12 20:35 ` [ 59/61] net: splice: avoid high order page splitting Greg Kroah-Hartman
2013-02-12 20:35 ` [ 60/61] net: splice: fix __splice_segment() Greg Kroah-Hartman
2013-02-12 20:35 ` [ 61/61] drm/nouveau: add lockdep annotations Greg Kroah-Hartman
2013-02-13 3:35 ` Peter Hurley
2013-02-13 9:33 ` Arend van Spriel
2013-02-13 9:43 ` Ben Skeggs
2013-02-13 9:52 ` Arend van Spriel
2013-02-13 17:46 ` Marcin Slusarz
2013-02-13 18:38 ` Marcin Slusarz
2013-02-13 7:06 ` [ 00/61] 3.7.8-stable review Satoru Takeuchi
2013-02-13 15:51 ` Shuah Khan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130212203419.086361026@linuxfoundation.org \
--to=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=rusty@rustcorp.com.au \
--cc=sjur.brandeland@stericsson.com \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).