From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
"Alexandru Herghelegiu" <aherghelegiu@bitdefender.com>,
"Adalbert Lazăr" <alazar@bitdefender.com>,
"Stefan Hajnoczi" <stefanha@redhat.com>,
"Stefano Garzarella" <sgarzare@redhat.com>,
"David S. Miller" <davem@davemloft.net>
Subject: [PATCH 4.9 19/41] vsock/virtio: fix kernel panic from virtio_transport_reset_no_sock
Date: Tue, 30 Apr 2019 13:38:30 +0200 [thread overview]
Message-ID: <20190430113529.840731483@linuxfoundation.org> (raw)
In-Reply-To: <20190430113524.451237916@linuxfoundation.org>
From: Adalbert Lazăr <alazar@bitdefender.com>
commit 4c404ce23358d5d8fbdeb7a6021a9b33d3c3c167 upstream.
Previous to commit 22b5c0b63f32 ("vsock/virtio: fix kernel panic
after device hot-unplug"), vsock_core_init() was called from
virtio_vsock_probe(). Now, virtio_transport_reset_no_sock() can be called
before vsock_core_init() has the chance to run.
[Wed Feb 27 14:17:09 2019] BUG: unable to handle kernel NULL pointer dereference at 0000000000000110
[Wed Feb 27 14:17:09 2019] #PF error: [normal kernel read fault]
[Wed Feb 27 14:17:09 2019] PGD 0 P4D 0
[Wed Feb 27 14:17:09 2019] Oops: 0000 [#1] SMP PTI
[Wed Feb 27 14:17:09 2019] CPU: 3 PID: 59 Comm: kworker/3:1 Not tainted 5.0.0-rc7-390-generic-hvi #390
[Wed Feb 27 14:17:09 2019] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[Wed Feb 27 14:17:09 2019] Workqueue: virtio_vsock virtio_transport_rx_work [vmw_vsock_virtio_transport]
[Wed Feb 27 14:17:09 2019] RIP: 0010:virtio_transport_reset_no_sock+0x8c/0xc0 [vmw_vsock_virtio_transport_common]
[Wed Feb 27 14:17:09 2019] Code: 35 8b 4f 14 48 8b 57 08 31 f6 44 8b 4f 10 44 8b 07 48 8d 7d c8 e8 84 f8 ff ff 48 85 c0 48 89 c3 74 2a e8 f7 31 03 00 48 89 df <48> 8b 80 10 01 00 00 e8 68 fb 69 ed 48 8b 75 f0 65 48 33 34 25 28
[Wed Feb 27 14:17:09 2019] RSP: 0018:ffffb42701ab7d40 EFLAGS: 00010282
[Wed Feb 27 14:17:09 2019] RAX: 0000000000000000 RBX: ffff9d79637ee080 RCX: 0000000000000003
[Wed Feb 27 14:17:09 2019] RDX: 0000000000000001 RSI: 0000000000000002 RDI: ffff9d79637ee080
[Wed Feb 27 14:17:09 2019] RBP: ffffb42701ab7d78 R08: ffff9d796fae70e0 R09: ffff9d796f403500
[Wed Feb 27 14:17:09 2019] R10: ffffb42701ab7d90 R11: 0000000000000000 R12: ffff9d7969d09240
[Wed Feb 27 14:17:09 2019] R13: ffff9d79624e6840 R14: ffff9d7969d09318 R15: ffff9d796d48ff80
[Wed Feb 27 14:17:09 2019] FS: 0000000000000000(0000) GS:ffff9d796fac0000(0000) knlGS:0000000000000000
[Wed Feb 27 14:17:09 2019] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Wed Feb 27 14:17:09 2019] CR2: 0000000000000110 CR3: 0000000427f22000 CR4: 00000000000006e0
[Wed Feb 27 14:17:09 2019] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[Wed Feb 27 14:17:09 2019] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[Wed Feb 27 14:17:09 2019] Call Trace:
[Wed Feb 27 14:17:09 2019] virtio_transport_recv_pkt+0x63/0x820 [vmw_vsock_virtio_transport_common]
[Wed Feb 27 14:17:09 2019] ? kfree+0x17e/0x190
[Wed Feb 27 14:17:09 2019] ? detach_buf_split+0x145/0x160
[Wed Feb 27 14:17:09 2019] ? __switch_to_asm+0x40/0x70
[Wed Feb 27 14:17:09 2019] virtio_transport_rx_work+0xa0/0x106 [vmw_vsock_virtio_transport]
[Wed Feb 27 14:17:09 2019] NET: Registered protocol family 40
[Wed Feb 27 14:17:09 2019] process_one_work+0x167/0x410
[Wed Feb 27 14:17:09 2019] worker_thread+0x4d/0x460
[Wed Feb 27 14:17:09 2019] kthread+0x105/0x140
[Wed Feb 27 14:17:09 2019] ? rescuer_thread+0x360/0x360
[Wed Feb 27 14:17:09 2019] ? kthread_destroy_worker+0x50/0x50
[Wed Feb 27 14:17:09 2019] ret_from_fork+0x35/0x40
[Wed Feb 27 14:17:09 2019] Modules linked in: vmw_vsock_virtio_transport vmw_vsock_virtio_transport_common input_leds vsock serio_raw i2c_piix4 mac_hid qemu_fw_cfg autofs4 cirrus ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops virtio_net psmouse drm net_failover pata_acpi virtio_blk failover floppy
Fixes: 22b5c0b63f32 ("vsock/virtio: fix kernel panic after device hot-unplug")
Reported-by: Alexandru Herghelegiu <aherghelegiu@bitdefender.com>
Signed-off-by: Adalbert Lazăr <alazar@bitdefender.com>
Co-developed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/vmw_vsock/virtio_transport_common.c | 22 +++++++++++++++-------
1 file changed, 15 insertions(+), 7 deletions(-)
--- a/net/vmw_vsock/virtio_transport_common.c
+++ b/net/vmw_vsock/virtio_transport_common.c
@@ -601,6 +601,8 @@ static int virtio_transport_reset(struct
*/
static int virtio_transport_reset_no_sock(struct virtio_vsock_pkt *pkt)
{
+ const struct virtio_transport *t;
+ struct virtio_vsock_pkt *reply;
struct virtio_vsock_pkt_info info = {
.op = VIRTIO_VSOCK_OP_RST,
.type = le16_to_cpu(pkt->hdr.type),
@@ -611,15 +613,21 @@ static int virtio_transport_reset_no_soc
if (le16_to_cpu(pkt->hdr.op) == VIRTIO_VSOCK_OP_RST)
return 0;
- pkt = virtio_transport_alloc_pkt(&info, 0,
- le64_to_cpu(pkt->hdr.dst_cid),
- le32_to_cpu(pkt->hdr.dst_port),
- le64_to_cpu(pkt->hdr.src_cid),
- le32_to_cpu(pkt->hdr.src_port));
- if (!pkt)
+ reply = virtio_transport_alloc_pkt(&info, 0,
+ le64_to_cpu(pkt->hdr.dst_cid),
+ le32_to_cpu(pkt->hdr.dst_port),
+ le64_to_cpu(pkt->hdr.src_cid),
+ le32_to_cpu(pkt->hdr.src_port));
+ if (!reply)
return -ENOMEM;
- return virtio_transport_get_ops()->send_pkt(pkt);
+ t = virtio_transport_get_ops();
+ if (!t) {
+ virtio_transport_free_pkt(reply);
+ return -ENOTCONN;
+ }
+
+ return t->send_pkt(reply);
}
static void virtio_transport_wait_close(struct sock *sk, long timeout)
next prev parent reply other threads:[~2019-04-30 12:08 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-30 11:38 [PATCH 4.9 00/41] 4.9.172-stable review Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 01/41] kbuild: simplify ld-option implementation Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 02/41] cifs: do not attempt cifs operation on smb2+ rename error Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 03/41] tracing: Fix a memory leak by early error exit in trace_pid_write() Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 04/41] MIPS: scall64-o32: Fix indirect syscall number load Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 05/41] trace: Fix preempt_enable_no_resched() abuse Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 06/41] IB/rdmavt: Fix frwr memory registration Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 07/41] sched/numa: Fix a possible divide-by-zero Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 08/41] ceph: ensure d_name stability in ceph_dentry_hash() Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 09/41] ceph: fix ci->i_head_snapc leak Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 10/41] nfsd: Dont release the callback slot unless it was actually held Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 11/41] sunrpc: dont mark uninitialised items as VALID Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 12/41] Input: synaptics-rmi4 - write config register values to the right offset Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 13/41] dmaengine: sh: rcar-dmac: With cyclic DMA residue 0 is valid Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 14/41] ARM: 8857/1: efi: enable CP15 DMB instructions before cleaning the cache Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 15/41] drm/vc4: Fix memory leak during gpu reset Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 16/41] drm/vc4: Fix compilation error reported by kbuild test bot Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 17/41] USB: Add new USB LPM helpers Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 18/41] USB: Consolidate LPM checks to avoid enabling LPM twice Greg Kroah-Hartman
2019-04-30 11:38 ` Greg Kroah-Hartman [this message]
2019-04-30 11:38 ` [PATCH 4.9 20/41] tipc: handle the err returned from cmd header function Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 21/41] slip: make slhc_free() silently accept an error pointer Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 22/41] intel_th: gth: Fix an off-by-one in output unassigning Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 23/41] fs/proc/proc_sysctl.c: Fix a NULL pointer dereference Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 24/41] NFS: Forbid setting AF_INET6 to "struct sockaddr_in"->sin_family Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 25/41] netfilter: ebtables: CONFIG_COMPAT: drop a bogus WARN_ON Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 26/41] fm10k: Fix a potential NULL pointer dereference Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 27/41] tipc: check bearer name with right length in tipc_nl_compat_bearer_enable Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 28/41] tipc: check link name with right length in tipc_nl_compat_link_set Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 29/41] Revert "block/loop: Use global lock for ioctl() operation." Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 30/41] ipv4: add sanity checks in ipv4_link_failure() Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 31/41] mlxsw: spectrum: Fix autoneg status in ethtool Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 32/41] net/mlx5e: ethtool, Remove unsupported SFP EEPROM high pages query Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 33/41] net: rds: exchange of 8K and 1M pool Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 34/41] team: fix possible recursive locking when add slaves Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 35/41] net: stmmac: move stmmac_check_ether_addr() to driver probe Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 36/41] ipv4: set the tcp_min_rtt_wlen range from 0 to one day Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 37/41] ipv6: frags: fix a lockdep false positive Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 38/41] net: IP defrag: encapsulate rbtree defrag code into callable functions Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 39/41] ipv6: remove dependency of nf_defrag_ipv6 on ipv6 module Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 40/41] net: IP6 defrag: use rbtrees for IPv6 defrag Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.9 41/41] net: IP6 defrag: use rbtrees in nf_conntrack_reasm.c Greg Kroah-Hartman
2019-04-30 22:26 ` [PATCH 4.9 00/41] 4.9.172-stable review kernelci.org bot
2019-04-30 22:30 ` shuah
2019-05-01 6:01 ` Naresh Kamboju
2019-05-01 8:24 ` Jon Hunter
2019-05-01 16:43 ` Guenter Roeck
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