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Parthasarathy Bhuvaragan says:
====================
tipc: fix hanging socket connections
This patch series contains fixes for the socket layer to
prevent hanging / stale connections.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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When a socket is shutting down, we notify the peer node about the
connection termination by reusing an incoming message if possible.
If the last received message was a connection acknowledgment
message, we reverse this message and set the error code to
TIPC_ERR_NO_PORT and send it to peer.
In tipc_sk_proto_rcv(), we never check for message errors while
processing the connection acknowledgment or probe messages. Thus
this message performs the usual flow control accounting and leaves
the session hanging.
In this commit, we terminate the connection when we receive such
error messages.
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Until now, the checks for sockets in CONNECTING state was based on
the assumption that the incoming message was always from the
peer's accepted data socket.
However an application using a non-blocking socket sends an implicit
connect, this socket which is in CONNECTING state can receive error
messages from the peer's listening socket. As we discard these
messages, the application socket hangs as there due to inactivity.
In addition to this, there are other places where we process errors
but do not notify the user.
In this commit, we process such incoming error messages and notify
our users about them using sk_state_change().
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In filter_connect, we use waitqueue_active() to check for any
connections to wakeup. But waitqueue_active() is missing memory
barriers while accessing the critical sections, leading to
inconsistent results.
In this commit, we replace this with an SMP safe wq_has_sleeper()
using the generic socket callback sk_data_ready().
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input fix from Dmitry Torokhov:
"Yet another quirk to i8042 to get touchpad recognized on some laptops"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: i8042 - add Clevo P650RS to the i8042 reset list
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Clevo P650RS and other similar devices require i8042 to be reset in order
to detect Synaptics touchpad.
Reported-by: Paweł Bylica <chfast@gmail.com>
Tested-by: Ed Bordin <edbordin@gmail.com>
Cc: stable@vger.kernel.org
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=190301
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fix from Chris Mason:
"We have one more fix for btrfs.
This gets rid of a new WARN_ON from rc1 that ended up making more
noise than we really want. The larger fix for the underflow got
delayed a bit and it's better for now to put it under
CONFIG_BTRFS_DEBUG"
* 'for-linus-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: qgroup: move noisy underflow warning to debugging build
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The WARN_ON and warning from report_reserved_underflow can become very
noisy and is visible unconditionally although this is namely for
debugging. The patch "btrfs: Add WARN_ON for qgroup reserved underflow"
(18dc22c19bef520cca11ce4c0807ac9dec48d31f) went to 4.11-rc1 and the plan
was to get the fix as well, but this hasn't happened.
CC: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Pull nfsd fixes from Bruce Fields:
"Thanks to Ari Kauppi and Tuomas Haanpää at Synopsis for spotting bugs
in our NFSv2/v3 xdr code that could crash the server or leak memory"
* tag 'nfsd-4.11-3' of git://linux-nfs.org/~bfields/linux:
nfsd: stricter decoding of write-like NFSv2/v3 ops
nfsd4: minor NFSv2/v3 write decoding cleanup
nfsd: check for oversized NFSv2/v3 arguments
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The NFSv2/v3 code does not systematically check whether we decode past
the end of the buffer. This generally appears to be harmless, but there
are a few places where we do arithmetic on the pointers involved and
don't account for the possibility that a length could be negative. Add
checks to catch these.
Reported-by: Tuomas Haanpää <thaan@synopsys.com>
Reported-by: Ari Kauppi <ari@synopsys.com>
Reviewed-by: NeilBrown <neilb@suse.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Use a couple shortcuts that will simplify a following bugfix.
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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A client can append random data to the end of an NFSv2 or NFSv3 RPC call
without our complaining; we'll just stop parsing at the end of the
expected data and ignore the rest.
Encoded arguments and replies are stored together in an array of pages,
and if a call is too large it could leave inadequate space for the
reply. This is normally OK because NFS RPC's typically have either
short arguments and long replies (like READ) or long arguments and short
replies (like WRITE). But a client that sends an incorrectly long reply
can violate those assumptions. This was observed to cause crashes.
Also, several operations increment rq_next_page in the decode routine
before checking the argument size, which can leave rq_next_page pointing
well past the end of the page array, causing trouble later in
svc_free_pages.
So, following a suggestion from Neil Brown, add a central check to
enforce our expectation that no NFSv2/v3 call has both a large call and
a large reply.
As followup we may also want to rewrite the encoding routines to check
more carefully that they aren't running off the end of the page array.
We may also consider rejecting calls that have any extra garbage
appended. That would be safer, and within our rights by spec, but given
the age of our server and the NFS protocol, and the fact that we've
never enforced this before, we may need to balance that against the
possibility of breaking some oddball client.
Reported-by: Tuomas Haanpää <thaan@synopsys.com>
Reported-by: Ari Kauppi <ari@synopsys.com>
Cc: stable@vger.kernel.org
Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Pull ceph fix from Ilya Dryomov:
"A fix for a kernel stack overflow bug in ceph setattr code, marked for
stable"
* tag 'ceph-for-4.11-rc9' of git://github.com/ceph/ceph-client:
ceph: fix recursion between ceph_set_acl() and __ceph_setattr()
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ceph_set_acl() calls __ceph_setattr() if the setacl operation needs
to modify inode's i_mode. __ceph_setattr() updates inode's i_mode,
then calls posix_acl_chmod().
The problem is that __ceph_setattr() calls posix_acl_chmod() before
sending the setattr request. The get_acl() call in posix_acl_chmod()
can trigger a getxattr request. The reply of the getxattr request
can restore inode's i_mode to its old value. The set_acl() call in
posix_acl_chmod() sees old value of inode's i_mode, so it calls
__ceph_setattr() again.
Cc: stable@vger.kernel.org # needs backporting for < 4.9
Link: http://tracker.ceph.com/issues/19688
Reported-by: Jerry Lee <leisurelysw24@gmail.com>
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Tested-by: Luis Henriques <lhenriques@suse.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro:
- fix orangefs handling of faults on write() - I'd missed that one back
when orangefs was going through review.
- readdir counterpart of "9p: cope with bogus responses from server in
p9_client_{read,write}" - server might be lying or broken, and we'd
better not overrun the kmalloc'ed buffer we are copying the results
into.
- NFS O_DIRECT read/write can leave iov_iter advanced by too much;
that's what had been causing iov_iter_pipe() warnings davej had been
seeing.
- statx_timestamp.tv_nsec type fix (s32 -> u32). That one really should
go in before 4.11.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
uapi: change the type of struct statx_timestamp.tv_nsec to unsigned
fix nfs O_DIRECT advancing iov_iter too much
p9_client_readdir() fix
orangefs_bufmap_copy_from_iovec(): fix EFAULT handling
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The comment asserting that the value of struct statx_timestamp.tv_nsec
must be negative when statx_timestamp.tv_sec is negative, is wrong, as
could be seen from the following example:
#define _FILE_OFFSET_BITS 64
#include <assert.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#include <asm/unistd.h>
#include <linux/stat.h>
int main(void)
{
static const struct timespec ts[2] = {
{ .tv_nsec = UTIME_OMIT },
{ .tv_sec = -2, .tv_nsec = 42 }
};
assert(utimensat(AT_FDCWD, ".", ts, 0) == 0);
struct stat st;
assert(stat(".", &st) == 0);
printf("st_mtim.tv_sec = %lld, st_mtim.tv_nsec = %lu\n",
(long long) st.st_mtim.tv_sec,
(unsigned long) st.st_mtim.tv_nsec);
struct statx stx;
assert(syscall(__NR_statx, AT_FDCWD, ".", 0, 0, &stx) == 0);
printf("stx_mtime.tv_sec = %lld, stx_mtime.tv_nsec = %lu\n",
(long long) stx.stx_mtime.tv_sec,
(unsigned long) stx.stx_mtime.tv_nsec);
return 0;
}
It expectedly prints:
st_mtim.tv_sec = -2, st_mtim.tv_nsec = 42
stx_mtime.tv_sec = -2, stx_mtime.tv_nsec = 42
The more generic comment asserting that the value of struct
statx_timestamp.tv_nsec might be negative is confusing to say the least.
It contradicts both the struct stat.st_[acm]time_nsec tradition and
struct timespec.tv_nsec requirements in utimensat syscall.
If statx syscall ever returns a stx_[acm]time containing a negative
tv_nsec that cannot be passed unmodified to utimensat syscall,
it will cause an immense confusion.
Fix this source of confusion by changing the type of struct
statx_timestamp.tv_nsec from __s32 to __u32.
Fixes: a528d35e8bfc ("statx: Add a system call to make enhanced file info available")
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-api@vger.kernel.org
cc: mtk.manpages@gmail.com
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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It leaves the iterator advanced by the amount of IO it has requested
instead of the amount actually transferred. Among other things,
that confuses the hell out of generic_file_splice_read().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Don't assume that server is sane and won't return more data than
asked for.
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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short copy here should mean instant EFAULT, not "move to the
next page and hope it fails there, this time with nothing
copied"
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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The change in commit 1e2f82d1e9d1 ("statx: Kill fd-with-NULL-path
support in favour of AT_EMPTY_PATH") to error on a NULL pathname to
statx() is inconsistent.
It results in the error EINVAL for a NULL pathname. Other system calls
with similar APIs (fchownat(), fstatat(), linkat()), return EFAULT.
The solution is simply to remove the EINVAL check. As I already pointed
out in [1], user_path_at*() and filename_lookup() will handle the NULL
pathname as per the other APIs, to correctly produce the error EFAULT.
[1] https://lkml.org/lkml/2017/4/26/561
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull sparc fixes from David Miller:
"I didn't want the release to go out without the statx system call
properly hooked up"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc: Update syscall tables.
sparc64: Fill in rest of HAVE_REGS_AND_STACK_ACCESS_API
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Hook up statx.
Ignore pkeys system calls, we don't have protection keeys
on SPARC.
Signed-off-by: David S. Miller <davem@davemloft.net>
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This lets us enable KPROBE_EVENTS.
Signed-off-by: David S. Miller <davem@davemloft.net>
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With the new statx() syscall, the following both allow the attributes of
the file attached to a file descriptor to be retrieved:
statx(dfd, NULL, 0, ...);
and:
statx(dfd, "", AT_EMPTY_PATH, ...);
Change the code to reject the first option, though this means copying
the path and engaging pathwalk for the fstat() equivalent. dfd can be a
non-directory provided path is "".
[ The timing of this isn't wonderful, but applying this now before we
have statx() in any released kernel, before anybody starts using the
NULL special case. - Linus ]
Fixes: a528d35e8bfc ("statx: Add a system call to make enhanced file info available")
Reported-by: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Eric Sandeen <sandeen@sandeen.net>
cc: fstests@vger.kernel.org
cc: linux-api@vger.kernel.org
cc: linux-man@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull networking fixes from David Miller:
1) MLX5 bug fixes from Saeed Mahameed et al:
- released wrong resources when firmware timeout happens
- fix wrong check for encapsulation size limits
- UAR memory leak
- ETHTOOL_GRXCLSRLALL failed to fill in info->data
2) Don't cache l3mdev on mis-matches local route, causes net devices to
leak refs. From Robert Shearman.
3) Handle fragmented SKBs properly in macsec driver, the problem is
that we were mis-sizing the sgvec table. From Jason A. Donenfeld.
4) We cannot have checksum offload enabled for inner UDP tunneled
packet during IPSEC, from Ansis Atteka.
5) Fix double SKB free in ravb driver, from Dan Carpenter.
6) Fix CPU port handling in b53 DSA driver, from Florian Dainelli.
7) Don't use on-stack buffers for usb_control_msg() in CAN usb driver,
from Maksim Salau.
8) Fix device leak in macvlan driver, from Herbert Xu. We have to purge
the broadcast queue properly on port destroy.
9) Fix tx ring entry limit on EF10 devices in sfc driver. From Bert
Kenward.
10) Fix memory leaks in team driver, from Pan Bian.
11) Don't setup ipv6_stub before it can be actually used, from Paolo
Abeni.
12) Fix tipc socket flow control accounting, from Parthasarathy
Bhuvaragan.
13) Fix crash on module unload in hso driver, from Andreas Kemnade.
14) Fix purging of bridge multicast entries, the problem is that if we
don't defer it to ndo_uninit it's possible for new entries to get
added after we purge. Fix from Xin Long.
15) Don't return garbage for PACKET_HDRLEN getsockopt, from Alexander
Potapenko.
16) Fix autoneg stall properly in PHY layer, and revert micrel driver
change that was papering over it. From Alexander Kochetkov.
17) Don't dereference an ipv4 route as an ipv6 one in the ip6_tunnnel
code, from Cong Wang.
18) Clear out the congestion control private of the TCP socket in all of
the right places, from Wei Wang.
19) rawv6_ioctl measures SKB length incorrectly, fix from Jamie
Bainbridge.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (41 commits)
ipv6: check raw payload size correctly in ioctl
tcp: memset ca_priv data to 0 properly
ipv6: check skb->protocol before lookup for nexthop
net: core: Prevent from dereferencing null pointer when releasing SKB
macsec: dynamically allocate space for sglist
Revert "phy: micrel: Disable auto negotiation on startup"
net: phy: fix auto-negotiation stall due to unavailable interrupt
net/packet: check length in getsockopt() called with PACKET_HDRLEN
net: ipv6: regenerate host route if moved to gc list
bridge: move bridge multicast cleanup to ndo_uninit
ipv6: fix source routing
qed: Fix error in the dcbx app meta data initialization.
netvsc: fix calculation of available send sections
net: hso: fix module unloading
tipc: fix socket flow control accounting error at tipc_recv_stream
tipc: fix socket flow control accounting error at tipc_send_stream
ipv6: move stub initialization after ipv6 setup completion
team: fix memory leaks
sfc: tx ring can only have 2048 entries for all EF10 NICs
macvlan: Fix device ref leak when purging bc_queue
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In situations where an skb is paged, the transport header pointer and
tail pointer can be the same because the skb contents are in frags.
This results in ioctl(SIOCINQ/FIONREAD) incorrectly returning a
length of 0 when the length to receive is actually greater than zero.
skb->len is already correctly set in ip6_input_finish() with
pskb_pull(), so use skb->len as it always returns the correct result
for both linear and paged data.
Signed-off-by: Jamie Bainbridge <jbainbri@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Always zero out ca_priv data in tcp_assign_congestion_control() so that
ca_priv data is cleared out during socket creation.
Also always zero out ca_priv data in tcp_reinit_congestion_control() so
that when cc algorithm is changed, ca_priv data is cleared out as well.
We should still zero out ca_priv data even in TCP_CLOSE state because
user could call connect() on AF_UNSPEC to disconnect the socket and
leave it in TCP_CLOSE state and later call setsockopt() to switch cc
algorithm on this socket.
Fixes: 2b0a8c9ee ("tcp: add CDG congestion control")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Wei Wang <weiwan@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Andrey reported a out-of-bound access in ip6_tnl_xmit(), this
is because we use an ipv4 dst in ip6_tnl_xmit() and cast an IPv4
neigh key as an IPv6 address:
neigh = dst_neigh_lookup(skb_dst(skb),
&ipv6_hdr(skb)->daddr);
if (!neigh)
goto tx_err_link_failure;
addr6 = (struct in6_addr *)&neigh->primary_key; // <=== HERE
addr_type = ipv6_addr_type(addr6);
if (addr_type == IPV6_ADDR_ANY)
addr6 = &ipv6_hdr(skb)->daddr;
memcpy(&fl6->daddr, addr6, sizeof(fl6->daddr));
Also the network header of the skb at this point should be still IPv4
for 4in6 tunnels, we shold not just use it as IPv6 header.
This patch fixes it by checking if skb->protocol is ETH_P_IPV6: if it
is, we are safe to do the nexthop lookup using skb_dst() and
ipv6_hdr(skb)->daddr; if not (aka IPv4), we have no clue about which
dest address we can pick here, we have to rely on callers to fill it
from tunnel config, so just fall to ip6_route_output() to make the
decision.
Fixes: ea3dc9601bda ("ip6_tunnel: Add support for wildcard tunnel endpoints.")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Added NULL check to make __dev_kfree_skb_irq consistent with kfree
family of functions.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=195289
Signed-off-by: Myungho Jung <mhjungk@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We call skb_cow_data, which is good anyway to ensure we can actually
modify the skb as such (another error from prior). Now that we have the
number of fragments required, we can safely allocate exactly that amount
of memory.
Fixes: c09440f7dcb3 ("macsec: introduce IEEE 802.1AE driver")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Acked-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This reverts commit 99f81afc139c6edd14d77a91ee91685a414a1c66.
It was papering over the real problem, which is fixed by commit
f555f34fdc58 ("net: phy: fix auto-negotiation stall due to unavailable
interrupt")
Signed-off-by: David S. Miller <davem@davemloft.net>
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The Ethernet link on an interrupt driven PHY was not coming up if the Ethernet
cable was plugged before the Ethernet interface was brought up.
The patch trigger PHY state machine to update link state if PHY was requested to
do auto-negotiation and auto-negotiation complete flag already set.
During power-up cycle the PHY do auto-negotiation, generate interrupt and set
auto-negotiation complete flag. Interrupt is handled by PHY state machine but
doesn't update link state because PHY is in PHY_READY state. After some time
MAC bring up, start and request PHY to do auto-negotiation. If there are no new
settings to advertise genphy_config_aneg() doesn't start PHY auto-negotiation.
PHY continue to stay in auto-negotiation complete state and doesn't fire
interrupt. At the same time PHY state machine expect that PHY started
auto-negotiation and is waiting for interrupt from PHY and it won't get it.
Fixes: 321beec5047a ("net: phy: Use interrupts when available in NOLINK state")
Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
Cc: stable <stable@vger.kernel.org> # v4.9+
Tested-by: Roger Quadros <rogerq@ti.com>
Tested-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In the case getsockopt() is called with PACKET_HDRLEN and optlen < 4
|val| remains uninitialized and the syscall may behave differently
depending on its value, and even copy garbage to userspace on certain
architectures. To fix this we now return -EINVAL if optlen is too small.
This bug has been detected with KMSAN.
Signed-off-by: Alexander Potapenko <glider@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Taking down the loopback device wreaks havoc on IPv6 routing. By
extension, taking down a VRF device wreaks havoc on its table.
Dmitry and Andrey both reported heap out-of-bounds reports in the IPv6
FIB code while running syzkaller fuzzer. The root cause is a dead dst
that is on the garbage list gets reinserted into the IPv6 FIB. While on
the gc (or perhaps when it gets added to the gc list) the dst->next is
set to an IPv4 dst. A subsequent walk of the ipv6 tables causes the
out-of-bounds access.
Andrey's reproducer was the key to getting to the bottom of this.
With IPv6, host routes for an address have the dst->dev set to the
loopback device. When the 'lo' device is taken down, rt6_ifdown initiates
a walk of the fib evicting routes with the 'lo' device which means all
host routes are removed. That process moves the dst which is attached to
an inet6_ifaddr to the gc list and marks it as dead.
The recent change to keep global IPv6 addresses added a new function,
fixup_permanent_addr, that is called on admin up. That function restarts
dad for an inet6_ifaddr and when it completes the host route attached
to it is inserted into the fib. Since the route was marked dead and
moved to the gc list, re-inserting the route causes the reported
out-of-bounds accesses. If the device with the address is taken down
or the address is removed, the WARN_ON in fib6_del is triggered.
All of those faults are fixed by regenerating the host route if the
existing one has been moved to the gc list, something that can be
determined by checking if the rt6i_ref counter is 0.
Fixes: f1705ec197e7 ("net: ipv6: Make address flushing on ifdown optional")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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During removing a bridge device, if the bridge is still up, a new mdb entry
still can be added in br_multicast_add_group() after all mdb entries are
removed in br_multicast_dev_del(). Like the path:
mld_ifc_timer_expire ->
mld_sendpack -> ...
br_multicast_rcv ->
br_multicast_add_group
The new mp's timer will be set up. If the timer expires after the bridge
is freed, it may cause use-after-free panic in br_multicast_group_expired.
BUG: unable to handle kernel NULL pointer dereference at 0000000000000048
IP: [<ffffffffa07ed2c8>] br_multicast_group_expired+0x28/0xb0 [bridge]
Call Trace:
<IRQ>
[<ffffffff81094536>] call_timer_fn+0x36/0x110
[<ffffffffa07ed2a0>] ? br_mdb_free+0x30/0x30 [bridge]
[<ffffffff81096967>] run_timer_softirq+0x237/0x340
[<ffffffff8108dcbf>] __do_softirq+0xef/0x280
[<ffffffff8169889c>] call_softirq+0x1c/0x30
[<ffffffff8102c275>] do_softirq+0x65/0xa0
[<ffffffff8108e055>] irq_exit+0x115/0x120
[<ffffffff81699515>] smp_apic_timer_interrupt+0x45/0x60
[<ffffffff81697a5d>] apic_timer_interrupt+0x6d/0x80
Nikolay also found it would cause a memory leak - the mdb hash is
reallocated and not freed due to the mdb rehash.
unreferenced object 0xffff8800540ba800 (size 2048):
backtrace:
[<ffffffff816e2287>] kmemleak_alloc+0x67/0xc0
[<ffffffff81260bea>] __kmalloc+0x1ba/0x3e0
[<ffffffffa05c60ee>] br_mdb_rehash+0x5e/0x340 [bridge]
[<ffffffffa05c74af>] br_multicast_new_group+0x43f/0x6e0 [bridge]
[<ffffffffa05c7aa3>] br_multicast_add_group+0x203/0x260 [bridge]
[<ffffffffa05ca4b5>] br_multicast_rcv+0x945/0x11d0 [bridge]
[<ffffffffa05b6b10>] br_dev_xmit+0x180/0x470 [bridge]
[<ffffffff815c781b>] dev_hard_start_xmit+0xbb/0x3d0
[<ffffffff815c8743>] __dev_queue_xmit+0xb13/0xc10
[<ffffffff815c8850>] dev_queue_xmit+0x10/0x20
[<ffffffffa02f8d7a>] ip6_finish_output2+0x5ca/0xac0 [ipv6]
[<ffffffffa02fbfc6>] ip6_finish_output+0x126/0x2c0 [ipv6]
[<ffffffffa02fc245>] ip6_output+0xe5/0x390 [ipv6]
[<ffffffffa032b92c>] NF_HOOK.constprop.44+0x6c/0x240 [ipv6]
[<ffffffffa032bd16>] mld_sendpack+0x216/0x3e0 [ipv6]
[<ffffffffa032d5eb>] mld_ifc_timer_expire+0x18b/0x2b0 [ipv6]
This could happen when ip link remove a bridge or destroy a netns with a
bridge device inside.
With Nikolay's suggestion, this patch is to clean up bridge multicast in
ndo_uninit after bridge dev is shutdown, instead of br_dev_delete, so
that netif_running check in br_multicast_add_group can avoid this issue.
v1->v2:
- fix this issue by moving br_multicast_dev_del to ndo_uninit, instead
of calling dev_close in br_dev_delete.
(NOTE: Depends upon b6fe0440c637 ("bridge: implement missing ndo_uninit()"))
Fixes: e10177abf842 ("bridge: multicast: fix handling of temp and perm entries")
Reported-by: Jianwen Ji <jiji@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit a149e7c7ce81 ("ipv6: sr: add support for SRH injection through
setsockopt") introduced handling of IPV6_SRCRT_TYPE_4, but at the same
time restricted it to only IPV6_SRCRT_TYPE_0 and
IPV6_SRCRT_TYPE_4. Previously, ipv6_push_exthdr() and fl6_update_dst()
would also handle other values (ie STRICT and TYPE_2).
Restore previous source routing behavior, by handling IPV6_SRCRT_STRICT
and IPV6_SRCRT_TYPE_2 the same way as IPV6_SRCRT_TYPE_0 in
ipv6_push_exthdr() and fl6_update_dst().
Fixes: a149e7c7ce81 ("ipv6: sr: add support for SRH injection through setsockopt")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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DCBX app_data array is initialized with the incorrect values for
personality field. This would prevent offloaded protocols from
honoring the PFC.
Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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My change (introduced in 4.11) to use find_first_clear_bit
incorrectly assumed that the size argument was words, not bits.
The effect was only a small limited number of the available send
sections were being actually used. This can cause performance loss
with some workloads.
Since map_words is now used only during initialization, it can
be on stack instead of in per-device data.
Fixes: b58a185801da ("netvsc: simplify get next send section")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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keep tty driver until usb driver is unregistered
rmmod hso
produces traces like this without that:
[40261.645904] usb 2-2: new high-speed USB device number 2 using ehci-omap
[40261.854644] usb 2-2: New USB device found, idVendor=0af0, idProduct=8800
[40261.862609] usb 2-2: New USB device strings: Mfr=3, Product=2, SerialNumber=0
[40261.872772] usb 2-2: Product: Globetrotter HSUPA Modem
[40261.880279] usb 2-2: Manufacturer: Option N.V.
[40262.021270] hso 2-2:1.5: Not our interface
[40265.556945] hso: unloaded
[40265.559875] usbcore: deregistering interface driver hso
[40265.595947] Unable to handle kernel NULL pointer dereference at virtual address 00000033
[40265.604522] pgd = ecb14000
[40265.611877] [00000033] *pgd=00000000
[40265.617034] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[40265.622650] Modules linked in: hso(-) bnep bluetooth ipv6 arc4 twl4030_madc_hwmon wl18xx wlcore mac80211 cfg80211 snd_soc_simple_card snd_soc_simple_card_utils snd_soc_omap_twl4030 snd_soc_gtm601 generic_adc_battery extcon_gpio omap3_isp videobuf2_dma_contig videobuf2_memops wlcore_sdio videobuf2_v4l2 videobuf2_core ov9650 bmp280_i2c v4l2_common bmp280 bmg160_i2c bmg160_core at24 nvmem_core videodev bmc150_accel_i2c bmc150_magn_i2c media bmc150_accel_core tsc2007 bmc150_magn leds_tca6507 bno055 snd_soc_omap_mcbsp industrialio_triggered_buffer snd_soc_omap kfifo_buf snd_pcm_dmaengine gpio_twl4030 snd_soc_twl4030 twl4030_vibra twl4030_madc wwan_on_off ehci_omap pwm_bl pwm_omap_dmtimer panel_tpo_td028ttec1 encoder_opa362 connector_analog_tv omapdrm drm_kms_helper cfbfillrect syscopyarea cfbimgblt sysfillrect
[40265.698211] sysimgblt fb_sys_fops cfbcopyarea drm omapdss usb_f_ecm g_ether usb_f_rndis u_ether libcomposite configfs omap2430 phy_twl4030_usb musb_hdrc twl4030_charger industrialio w2sg0004 twl4030_pwrbutton bq27xxx_battery w1_bq27000 omap_hdq [last unloaded: hso]
[40265.723175] CPU: 0 PID: 2701 Comm: rmmod Not tainted 4.11.0-rc6-letux+ #6
[40265.730346] Hardware name: Generic OMAP36xx (Flattened Device Tree)
[40265.736938] task: ecb81100 task.stack: ecb82000
[40265.741729] PC is at cdev_del+0xc/0x2c
[40265.745666] LR is at tty_unregister_device+0x40/0x50
[40265.750915] pc : [<c027472c>] lr : [<c04b3ecc>] psr: 600b0113
sp : ecb83ea8 ip : eca4f898 fp : 00000000
[40265.763000] r10: 00000000 r9 : 00000000 r8 : 00000001
[40265.768493] r7 : eca4f800 r6 : 00000003 r5 : 00000000 r4 : ffffffff
[40265.775360] r3 : c1458d54 r2 : 00000000 r1 : 00000004 r0 : ffffffff
[40265.782257] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[40265.789764] Control: 10c5387d Table: acb14019 DAC: 00000051
[40265.795806] Process rmmod (pid: 2701, stack limit = 0xecb82218)
[40265.802062] Stack: (0xecb83ea8 to 0xecb84000)
[40265.806640] 3ea0: ec9e8100 c04b3ecc bf737378 ed5b7c00 00000003 bf7327ec
[40265.815277] 3ec0: eca4f800 00000000 ec9fd800 eca4f800 bf737070 bf7328bc eca4f820 c05a9a04
[40265.823883] 3ee0: eca4f820 00000000 00000001 eca4f820 ec9fd870 bf737070 eca4f854 ec9fd8a4
[40265.832519] 3f00: ecb82000 00000000 00000000 c04e6960 eca4f820 bf737070 bf737048 00000081
[40265.841125] 3f20: c01071e4 c04e6a60 ecb81100 bf737070 bf737070 c04e5d94 bf737020 c05a8f88
[40265.849731] 3f40: bf737100 00000800 7f5fa254 00000081 c01071e4 c01c4afc 00000000 006f7368
[40265.858367] 3f60: ecb815f4 00000000 c0cac9c4 c01071e4 ecb82000 00000000 00000000 c01512f4
[40265.866973] 3f80: ed5b3200 c01071e4 7f5fa220 7f5fa220 bea78ec9 0010711c 7f5fa220 7f5fa220
[40265.875579] 3fa0: bea78ec9 c0107040 7f5fa220 7f5fa220 7f5fa254 00000800 dd35b800 dd35b800
[40265.884216] 3fc0: 7f5fa220 7f5fa220 bea78ec9 00000081 bea78dcc 00000000 bea78bd8 00000000
[40265.892822] 3fe0: b6f70521 bea78b6c 7f5dd613 b6f70526 80070030 7f5fa254 ffffffff ffffffff
[40265.901458] [<c027472c>] (cdev_del) from [<c04b3ecc>] (tty_unregister_device+0x40/0x50)
[40265.909942] [<c04b3ecc>] (tty_unregister_device) from [<bf7327ec>] (hso_free_interface+0x80/0x144 [hso])
[40265.919982] [<bf7327ec>] (hso_free_interface [hso]) from [<bf7328bc>] (hso_disconnect+0xc/0x18 [hso])
[40265.929718] [<bf7328bc>] (hso_disconnect [hso]) from [<c05a9a04>] (usb_unbind_interface+0x84/0x200)
[40265.939239] [<c05a9a04>] (usb_unbind_interface) from [<c04e6960>] (device_release_driver_internal+0x138/0x1cc)
[40265.949798] [<c04e6960>] (device_release_driver_internal) from [<c04e6a60>] (driver_detach+0x60/0x6c)
[40265.959503] [<c04e6a60>] (driver_detach) from [<c04e5d94>] (bus_remove_driver+0x64/0x8c)
[40265.968017] [<c04e5d94>] (bus_remove_driver) from [<c05a8f88>] (usb_deregister+0x5c/0xb8)
[40265.976654] [<c05a8f88>] (usb_deregister) from [<c01c4afc>] (SyS_delete_module+0x160/0x1dc)
[40265.985443] [<c01c4afc>] (SyS_delete_module) from [<c0107040>] (ret_fast_syscall+0x0/0x1c)
[40265.994171] Code: c1458d54 e59f3020 e92d4010 e1a04000 (e5941034)
[40266.016693] ---[ end trace 9d5ac43c7e41075c ]---
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Until now in tipc_recv_stream(), we update the received
unacknowledged bytes based on a stack variable and not based on the
actual message size.
If the user buffer passed at tipc_recv_stream() is smaller than the
received skb, the size variable in stack differs from the actual
message size in the skb. This leads to a flow control accounting
error causing permanent congestion.
In this commit, we fix this accounting error by always using the
size of the incoming message.
Fixes: 10724cc7bb78 ("tipc: redesign connection-level flow control")
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Until now in tipc_send_stream(), we return -1 when the socket
encounters link congestion even if the socket had successfully
sent partial data. This is incorrect as the application resends
the same the partial data leading to data corruption at
receiver's end.
In this commit, we return the partially sent bytes as the return
value at link congestion.
Fixes: 10724cc7bb78 ("tipc: redesign connection-level flow control")
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The ipv6 stub pointer is currently initialized before the ipv6
routing subsystem: a 3rd party can access and use such stub
before the routing data is ready.
Moreover, such pointer is not cleared in case of initialization
error, possibly leading to dangling pointers usage.
This change addresses the above moving the stub initialization
at the end of ipv6 init code.
Fixes: 5f81bd2e5d80 ("ipv6: export a stub for IPv6 symbols used by vxlan")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In functions team_nl_send_port_list_get() and
team_nl_send_options_get(), pointer skb keeps the return value of
nlmsg_new(). When the call to genlmsg_put() fails, the memory is not
freed(). This will result in memory leak bugs.
Fixes: 9b00cf2d1024 ("team: implement multipart netlink messages for options transfers")
Signed-off-by: Pan Bian <bianpan2016@163.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can
Marc Kleine-Budde says:
====================
pull-request: can 2017-04-25
this is a pull request of three patches for net/master.
There are two patches by Stephane Grosjean for that add a new variant to the
PCAN-Chip USB driver. The other patch is by Maksim Salau, which swtiches the
memory for USB transfers from heap to stack.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Allocate buffers on HEAP instead of STACK for local structures
that are to be sent using usb_control_msg().
Signed-off-by: Maksim Salau <maksim.salau@gmail.com>
Cc: linux-stable <stable@vger.kernel.org> # >= v4.8
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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This patch adds a text line in the help section of the CAN_PEAK_USB
config item describing the support of the PCAN-USB X6 adapter, which is
already included in the Kernel since 4.9.
Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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This patch adds the support of the PCAN-Chip USB, a stamp module for
customer hardware designs, which communicates via USB 2.0 with the
hardware. The integrated CAN controller supports the protocols CAN 2.0 A/B
as well as CAN FD. The physical CAN connection is determined by external
wiring. The Stamp module with its single-sided mounting and plated
half-holes is suitable for automatic assembly.
Note that the chip is equipped with the same logic than the PCAN-USB FD.
Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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Fixes: dd248f1bc65b ("sfc: Add PCI ID for Solarflare 8000 series 10/40G NIC")
Reported-by: Patrick Talbert <ptalbert@redhat.com>
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When a parent macvlan device is destroyed we end up purging its
broadcast queue without dropping the device reference count on
the packet source device. This causes the source device to linger.
This patch drops that reference count.
Fixes: 260916dfb48c ("macvlan: Fix potential use-after free for...")
Reported-by: Joe Ghalam <Joe.Ghalam@dell.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch adds support for the PL-27A1 by adding the appropriate
USB ID's. This chip is used in the goobay Active USB 3.0 Data Link
and Unitek Y-3501 cables.
Signed-off-by: Roman Spychała <roed@onet.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
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