- 30 Mar, 2017 24 commits
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Eric Dumazet authored
commit 39e6c820 upstream. While playing with mlx4 hardware timestamping of RX packets, I found that some packets were received by TCP stack with a ~200 ms delay... Since the timestamp was provided by the NIC, and my probe was added in tcp_v4_rcv() while in BH handler, I was confident it was not a sender issue, or a drop in the network. This would happen with a very low probability, but hurting RPC workloads. A NAPI driver normally arms the IRQ after the napi_complete_done(), after NAPI_STATE_SCHED is cleared, so that the hard irq handler can grab it. Problem is that if another point in the stack grabs NAPI_STATE_SCHED bit while IRQ are not disabled, we might have later an IRQ firing and finding this bit set, right before napi_complete_done() clears it. This can happen with busy polling users, or if gro_flush_timeout is used. But some other uses of napi_schedule() in drivers can cause this as well. thread 1 thread 2 (could be on same cpu, or not) // busy polling or napi_watchdog() napi_schedule(); ... napi->poll() device polling: read 2 packets from ring buffer Additional 3rd packet is available. device hard irq // does nothing because NAPI_STATE_SCHED bit is owned by thread 1 napi_schedule(); napi_complete_done(napi, 2); rearm_irq(); Note that rearm_irq() will not force the device to send an additional IRQ for the packet it already signaled (3rd packet in my example) This patch adds a new NAPI_STATE_MISSED bit, that napi_schedule_prep() can set if it could not grab NAPI_STATE_SCHED Then napi_complete_done() properly reschedules the napi to make sure we do not miss something. Since we manipulate multiple bits at once, use cmpxchg() like in sk_busy_loop() to provide proper transactions. In v2, I changed napi_watchdog() to use a relaxed variant of napi_schedule_prep() : No need to set NAPI_STATE_MISSED from this point. In v3, I added more details in the changelog and clears NAPI_STATE_MISSED in busy_poll_stop() In v4, I added the ideas given by Alexander Duyck in v3 review Signed-off-by:
Eric Dumazet <edumazet@google.com> Cc: Alexander Duyck <alexander.duyck@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Lendacky, Thomas authored
[ Upstream commit f43feef4 ] The ECC bit positions that describe whether the ECC interrupt is for Tx, Rx or descriptor memory and whether the it is a single correctable or double detected error were defined in incorrectly (reversed order). Fix the bit position definitions for these settings so that the proper ECC handling is performed. Signed-off-by:
Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by:
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Eric Dumazet authored
[ Upstream commit 15bb7745 ] icsk_ack.lrcvtime has a 0 value at socket creation time. tcpi_last_data_recv can have bogus value if no payload is ever received. This patch initializes icsk_ack.lrcvtime for active sessions in tcp_finish_connect(), and for passive sessions in tcp_create_openreq_child() Signed-off-by:
Neal Cardwell <ncardwell@google.com> Signed-off-by:
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Stanislaw Gruszka authored
[ Upstream commit 1d2a6a5e ] Commit 2ae0f17d ("genetlink: use idr to track families") replaced if (++n < fams_to_skip) continue; into: if (n++ < fams_to_skip) continue; This subtle change cause that on retry ctrl_dumpfamily() call we omit one family that failed to do ctrl_fill_info() on previous call, because cb->args[0] = n number counts also family that failed to do ctrl_fill_info(). Patch fixes the problem and avoid confusion in the future just decrease n counter when ctrl_fill_info() fail. User visible problem caused by this bug is failure to get access to some genetlink family i.e. nl80211. However problem is reproducible only if number of registered genetlink families is big enough to cause second call of ctrl_dumpfamily(). Cc: Xose Vazquez Perez <xose.vazquez@gmail.com> Cc: Larry Finger <Larry.Finger@lwfinger.net> Cc: Johannes Berg <johannes@sipsolutions.net> Fixes: 2ae0f17d ("genetlink: use idr to track families") Signed-off-by:
Stanislaw Gruszka <sgruszka@redhat.com> Acked-by:
Johannes Berg <johannes@sipsolutions.net> Signed-off-by:
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Daniel Borkmann authored
[ Upstream commit a97e50cc ] In sk_clone_lock(), we create a new socket and inherit most of the parent's members via sock_copy() which memcpy()'s various sections. Now, in case the parent socket had a BPF socket filter attached, then newsk->sk_filter points to the same instance as the original sk->sk_filter. sk_filter_charge() is then called on the newsk->sk_filter to take a reference and should that fail due to hitting max optmem, we bail out and release the newsk instance. The issue is that commit 278571ba ("net: filter: simplify socket charging") wrongly combined the dismantle path with the failure path of xfrm_sk_clone_policy(). This means, even when charging failed, we call sk_free_unlock_clone() on the newsk, which then still points to the same sk_filter as the original sk. Thus, sk_free_unlock_clone() calls into __sk_destruct() eventually where it tests for present sk_filter and calls sk_filter_uncharge() on it, which potentially lets sk_omem_alloc wrap around and releases the eBPF prog and sk_filter structure from the (still intact) parent. Fix it by making sure that when sk_filter_charge() failed, we reset newsk->sk_filter back to NULL before passing to sk_free_unlock_clone(), so that we don't mess with the parents sk_filter. Only if xfrm_sk_clone_policy() fails, we did reach the point where either the parent's filter was NULL and as a result newsk's as well or where we previously had a successful sk_filter_charge(), thus for that case, we do need sk_filter_uncharge() to release the prior taken reference on sk_filter. Fixes: 278571ba ("net: filter: simplify socket charging") Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
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Eric Dumazet authored
[ Upstream commit c64c0b3c ] Alexander reported a KMSAN splat caused by reads of uninitialized field (tb_id_in) from user provided struct fib_result_nl It turns out nl_fib_input() sanity tests on user input is a bit wrong : User can pretend nlh->nlmsg_len is big enough, but provide at sendmsg() time a too small buffer. Reported-by:
Alexander Potapenko <glider@google.com> Signed-off-by:
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Doug Berger authored
[ Upstream commit 31739eae ] Commit 6ac3ce82 ("net: bcmgenet: Remove excessive PHY reset") removed the bcmgenet_mii_reset() function from bcmgenet_power_up() and bcmgenet_internal_phy_setup() functions. In so doing it broke the reset of the internal PHY devices used by the GENETv1-GENETv3 which required this reset before the UniMAC was enabled. It also broke the internal GPHY devices used by the GENETv4 because the config_init that installed the AFE workaround was no longer occurring after the reset of the GPHY performed by bcmgenet_phy_power_set() in bcmgenet_internal_phy_setup(). In addition the code in bcmgenet_internal_phy_setup() related to the "enable APD" comment goes with the bcmgenet_mii_reset() so it should have also been removed. Commit bd4060a6 ("net: bcmgenet: Power on integrated GPHY in bcmgenet_power_up()") moved the bcmgenet_phy_power_set() call to the bcmgenet_power_up() function, but failed to remove it from the bcmgenet_internal_phy_setup() function. Had it done so, the bcmgenet_internal_phy_setup() function would have been empty and could have been removed at that time. Commit 5dbebbb4 ("net: bcmgenet: Software reset EPHY after power on") was submitted to correct the functional problems introduced by commit 6ac3ce82 ("net: bcmgenet: Remove excessive PHY reset"). It was included in v4.4 and made available on 4.3-stable. Unfortunately, it didn't fully revert the commit because this bcmgenet_mii_reset() doesn't apply the soft reset to the internal GPHY used by GENETv4 like the previous one did. This prevents the restoration of the AFE work- arounds for internal GPHY devices after the bcmgenet_phy_power_set() in bcmgenet_internal_phy_setup(). This commit takes the alternate approach of removing the unnecessary bcmgenet_internal_phy_setup() function which shouldn't have been in v4.3 so that when bcmgenet_mii_reset() was restored it should have only gone into bcmgenet_power_up(). This will avoid the problems while also removing the redundancy (and hopefully some of the confusion). Fixes: 6ac3ce82 ("net: bcmgenet: Remove excessive PHY reset") Signed-off-by:
Doug Berger <opendmb@gmail.com> Reviewed-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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Alexander Potapenko authored
[ Upstream commit d515684d ] In the case udp_sk(sk)->pending is AF_INET6, udpv6_sendmsg() would jump to do_append_data, skipping the initialization of sockc.tsflags. Fix the problem by moving sockc.tsflags initialization earlier. The bug was detected with KMSAN. Fixes: c14ac945 ("sock: enable timestamping using control messages") Signed-off-by:
Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by:
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Gal Pressman authored
[ Upstream commit 8ab7e2ae ] RX packets statistics ('rx_packets' counter) used to count LRO packets as one, even though it contains multiple segments. This patch will increment the counter by the number of segments, and align the driver with the behavior of other drivers in the stack. Note that no information is lost in this patch due to 'rx_lro_packets' counter existence. Before, ethtool showed: $ ethtool -S ens6 | egrep "rx_packets|rx_lro_packets" rx_packets: 435277 rx_lro_packets: 35847 rx_packets_phy: 1935066 Now, we will see the more logical statistics: $ ethtool -S ens6 | egrep "rx_packets|rx_lro_packets" rx_packets: 1935066 rx_lro_packets: 35847 rx_packets_phy: 1935066 Fixes: e586b3b0 ("net/mlx5: Ethernet Datapath files") Signed-off-by:
Gal Pressman <galp@mellanox.com> Cc: kernel-team@fb.com Signed-off-by:
Saeed Mahameed <saeedm@mellanox.com> Acked-by:
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Gal Pressman authored
[ Upstream commit d3a4e4da ] TX packets statistics ('tx_packets' counter) used to count GSO packets as one, even though it contains multiple segments. This patch will increment the counter by the number of segments, and align the driver with the behavior of other drivers in the stack. Note that no information is lost in this patch due to 'tx_tso_packets' counter existence. Before, ethtool showed: $ ethtool -S ens6 | egrep "tx_packets|tx_tso_packets" tx_packets: 61340 tx_tso_packets: 60954 tx_packets_phy: 2451115 Now, we will see the more logical statistics: $ ethtool -S ens6 | egrep "tx_packets|tx_tso_packets" tx_packets: 2451115 tx_tso_packets: 60954 tx_packets_phy: 2451115 Fixes: e586b3b0 ("net/mlx5: Ethernet Datapath files") Signed-off-by:
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Maor Gottlieb authored
[ Upstream commit 5f40b4ed ] With ConnectX-4 sharing SRQs from the same space as QPs, we hit a limit preventing some applications to allocate needed QPs amount. Double the size to 256K. Fixes: e126ba97 ('mlx5: Add driver for Mellanox Connect-IB adapters') Signed-off-by:
Maor Gottlieb <maorg@mellanox.com> Signed-off-by:
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Paul Blakey authored
[ Upstream commit 1ad9a00a ] This was added to allow the TC offloading code to identify offloading encap/decap vxlan rules. The VF reps are effectively related to the same mlx5 PCI device as the PF. Since the kernel invokes the (say) delete ndo for each netdev, the FW erred on multiple vxlan dst port deletes when the port was deleted from the system. We fix that by keeping the registration to be carried out only by the PF. Since the PF serves as the uplink device, the VF reps will look up a port there and realize if they are ok to offload that. Tested: <SETUP VFS> <SETUP switchdev mode to have representors> ip link add vxlan1 type vxlan id 44 dev ens5f0 dstport 9999 ip link set vxlan1 up ip link del dev vxlan1 Fixes: 4a25730e ('net/mlx5e: Add ndo_udp_tunnel_add to VF representors') Signed-off-by:
Paul Blakey <paulb@mellanox.com> Reviewed-by:
Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by:
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Or Gerlitz authored
[ Upstream commit 09c91ddf ] Currently we use the non UAPI values and we miss erring on the modify action which is not supported, fix that. Fixes: 8b32580d ('net/mlx5e: Add TC vlan action for SRIOV offloads') Signed-off-by:
Petr Machata <petrm@mellanox.com> Reviewed-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
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Roi Dayan authored
[ Upstream commit 375f51e2 ] Changing the eswitch inline mode can potentially cause already configured flows not to match the policy. E.g. set policy L4, add some L4 rules, set policy to L2 --> bad! Hence we disallow it. Keep track of how many offloaded rules are now set and refuse inline mode changes if this isn't zero. Fixes: bffaa916 ("net/mlx5: E-Switch, Add control for inline mode") Signed-off-by:
Roi Dayan <roid@mellanox.com> Reviewed-by:
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Or Gerlitz authored
[ Upstream commit d85cdccb ] Refactor the code to deal with add/del TC rules to have handler per NIC/E-switch offloading use case, and push the latter into the e-switch code. This provides better separation and is to be used in down-stream patch for applying a fix. Fixes: bffaa916 ("net/mlx5: E-Switch, Add control for inline mode") Signed-off-by:
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Or Gerlitz authored
[ Upstream commit 1f30a86c ] The switch cases for the rate limit set and query commands were missing, which could get us wrong under fw error or driver reset flow, fix that. Fixes: 1466cc5b ('net/mlx5: Rate limit tables support') Signed-off-by:
Hadar Hen Zion <hadarh@mellanox.com> Signed-off-by:
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David Ahern authored
[ Upstream commit 3dc857f0 ] The VRF driver takes a reference to the inet6_dev on the VRF device for its rt6_local dst when handling local traffic through the VRF device as a loopback. When the device is deleted the driver does a put on the idev but does not reset rt6i_idev in the rt6_info struct. When the dst is destroyed, dst_destroy calls ip6_dst_destroy which does a second put for what is essentially the same reference causing it to be prematurely freed. Reset rt6i_idev after the put in the vrf driver. Fixes: b4869aa2 ("net: vrf: ipv6 support for local traffic to local addresses") Signed-off-by:
David Ahern <dsa@cumulusnetworks.com> Signed-off-by:
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Bjørn Mork authored
[ Upstream commit 6bd845d1 ] This is a Dell branded Sierra Wireless EM7455. It is operating in MBIM mode by default, but can be configured to provide two QMI/RMNET functions. Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
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Andrey Ulanov authored
[ Upstream commit 7df9c246 ] Dmitry has reported that a BUG_ON() condition in unix_notinflight() may be triggered by a simple code that forwards unix socket in an SCM_RIGHTS message. That is caused by incorrect unix socket GC implementation in unix_gc(). The GC first collects list of candidates, then (a) decrements their "children's" inflight counter, (b) checks which inflight counters are now 0, and then (c) increments all inflight counters back. (a) and (c) are done by calling scan_children() with inc_inflight or dec_inflight as the second argument. Commit 6209344f ("net: unix: fix inflight counting bug in garbage collector") changed scan_children() such that it no longer considers sockets that do not have UNIX_GC_CANDIDATE flag. It also added a block of code that that unsets this flag _before_ invoking scan_children(, dec_iflight, ). This may lead to incorrect inflight counters for some sockets. This change fixes this bug by changing order of operations: UNIX_GC_CANDIDATE is now unset only after all inflight counters are restored to the original state. kernel BUG at net/unix/garbage.c:149! RIP: 0010:[<ffffffff8717ebf4>] [<ffffffff8717ebf4>] unix_notinflight+0x3b4/0x490 net/unix/garbage.c:149 Call Trace: [<ffffffff8716cfbf>] unix_detach_fds.isra.19+0xff/0x170 net/unix/af_unix.c:1487 [<ffffffff8716f6a9>] unix_destruct_scm+0xf9/0x210 net/unix/af_unix.c:1496 [<ffffffff86a90a01>] skb_release_head_state+0x101/0x200 net/core/skbuff.c:655 [<ffffffff86a9808a>] skb_release_all+0x1a/0x60 net/core/skbuff.c:668 [<ffffffff86a980ea>] __kfree_skb+0x1a/0x30 net/core/skbuff.c:684 [<ffffffff86a98284>] kfree_skb+0x184/0x570 net/core/skbuff.c:705 [<ffffffff871789d5>] unix_release_sock+0x5b5/0xbd0 net/unix/af_unix.c:559 [<ffffffff87179039>] unix_release+0x49/0x90 net/unix/af_unix.c:836 [<ffffffff86a694b2>] sock_release+0x92/0x1f0 net/socket.c:570 [<ffffffff86a6962b>] sock_close+0x1b/0x20 net/socket.c:1017 [<ffffffff81a76b8e>] __fput+0x34e/0x910 fs/file_table.c:208 [<ffffffff81a771da>] ____fput+0x1a/0x20 fs/file_table.c:244 [<ffffffff81483ab0>] task_work_run+0x1a0/0x280 kernel/task_work.c:116 [< inline >] exit_task_work include/linux/task_work.h:21 [<ffffffff8141287a>] do_exit+0x183a/0x2640 kernel/exit.c:828 [<ffffffff8141383e>] do_group_exit+0x14e/0x420 kernel/exit.c:931 [<ffffffff814429d3>] get_signal+0x663/0x1880 kernel/signal.c:2307 [<ffffffff81239b45>] do_signal+0xc5/0x2190 arch/x86/kernel/signal.c:807 [<ffffffff8100666a>] exit_to_usermode_loop+0x1ea/0x2d0 arch/x86/entry/common.c:156 [< inline >] prepare_exit_to_usermode arch/x86/entry/common.c:190 [<ffffffff81009693>] syscall_return_slowpath+0x4d3/0x570 arch/x86/entry/common.c:259 [<ffffffff881478e6>] entry_SYSCALL_64_fastpath+0xc4/0xc6 Link: https://lkml.org/lkml/2017/3/6/252Signed-off-by:
Andrey Ulanov <andreyu@google.com> Reported-by:
Dmitry Vyukov <dvyukov@google.com> Fixes: 6209344f ("net: unix: fix inflight counting bug in garbage collector") Signed-off-by:
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Kris Murphy authored
[ Upstream commit 8f3dbfd7 ] Added a case for OVS_TUNNEL_KEY_ATTR_PAD to the switch statement in ip_tun_from_nlattr in order to prevent the default case returning an error. Fixes: b46f6ded ("libnl: nla_put_be64(): align on a 64-bit area") Signed-off-by:
Kris Murphy <kriskend@linux.vnet.ibm.com> Acked-by:
Joe Stringer <joe@ovn.org> Signed-off-by:
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Lendacky, Thomas authored
[ Upstream commit 622c36f1 ] Newer hardware does not provide a cumulative payload length when multiple descriptors are needed to handle the data. Once the MTU increases beyond the size that can be handled by a single descriptor, the SKB does not get built properly by the driver. The driver will now calculate the size of the data buffers used by the hardware. The first buffer of the first descriptor is for packet headers or packet headers and data when the headers can't be split. Subsequent descriptors in a multi-descriptor chain will not use the first buffer. The second buffer is used by all the descriptors in the chain for payload data. Based on whether the driver is processing the first, intermediate, or last descriptor it can calculate the buffer usage and build the SKB properly. Tested and verified on both old and new hardware. Signed-off-by:
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Eric Dumazet authored
[ Upstream commit 22a0e18e ] I mistakenly added the code to release sk->sk_frag in sk_common_release() instead of sk_destruct() TCP sockets using sk->sk_allocation == GFP_ATOMIC do no call sk_common_release() at close time, thus leaking one (order-3) page. iSCSI is using such sockets. Fixes: 5640f768 ("net: use a per task frag allocator") Signed-off-by:
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Florian Fainelli authored
[ Upstream commit 5371bbf4 ] Suspending the PHY would be putting it in a low power state where it may no longer allow us to do Wake-on-LAN. Fixes: cc013fb4 ("net: bcmgenet: correctly suspend and resume PHY device") Signed-off-by:
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Or Gerlitz authored
[ Upstream commit 3d20f1f7 ] When dealing with ipv6 source tunnel key address attribute (OVS_TUNNEL_KEY_ATTR_IPV6_SRC) we are wrongly setting the tunnel dst ip, fix that. Fixes: 6b26ba3a ('openvswitch: netlink attributes for IPv6 tunneling') Signed-off-by:
Jiri Benc <jbenc@redhat.com> Acked-by:
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- 26 Mar, 2017 16 commits
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Greg Kroah-Hartman authored
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Alex Deucher authored
commit 18a8de1b upstream. OLAND 0x1002:0x6604 0x1028:0x066F 0x00 seems to have problems with higher sclks. Acked-by:
Christian König <christian.koenig@amd.com> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Tejun Heo authored
commit 1d18c274 upstream. pids_can_fork() is special in that the css association is guaranteed to be stable throughout the function and thus doesn't need RCU protection around task_css access. When determining the css to charge the pid, task_css_check() is used to override the RCU sanity check. While adding a warning message on fork rejection from pids limit, 135b8b37 ("cgroup: Add pids controller event when fork fails because of pid limit") incorrectly added a task_css access which is neither RCU protected or explicitly annotated. This triggers the following suspicious RCU usage warning when RCU debugging is enabled. cgroup: fork rejected by pids controller in =============================== [ ERR: suspicious RCU usage. ] 4.10.0-work+ #1 Not tainted ------------------------------- ./include/linux/cgroup.h:435 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 0 1 lock held by bash/1748: #0: (&cgroup_threadgroup_rwsem){+++++.}, at: [<ffffffff81052c96>] _do_fork+0xe6/0x6e0 stack backtrace: CPU: 3 PID: 1748 Comm: bash Not tainted 4.10.0-work+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-1.fc25 04/01/2014 Call Trace: dump_stack+0x68/0x93 lockdep_rcu_suspicious+0xd7/0x110 pids_can_fork+0x1c7/0x1d0 cgroup_can_fork+0x67/0xc0 copy_process.part.58+0x1709/0x1e90 _do_fork+0xe6/0x6e0 SyS_clone+0x19/0x20 do_syscall_64+0x5c/0x140 entry_SYSCALL64_slow_path+0x25/0x25 RIP: 0033:0x7f7853fab93a RSP: 002b:00007ffc12d05c90 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7853fab93a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc12d05cc0 R08: 0000000000000000 R09: 00007f78548db700 R10: 00007f78548db9d0 R11: 0000000000000246 R12: 00000000000006d4 R13: 0000000000000001 R14: 0000000000000000 R15: 000055e3ebe2c04d /asdf There's no reason to dereference task_css again here when the associated css is already available. Fix it by replacing the task_cgroup() call with css->cgroup. Signed-off-by:
Tejun Heo <tj@kernel.org> Reported-by:
Mike Galbraith <efault@gmx.de> Fixes: 135b8b37 ("cgroup: Add pids controller event when fork fails because of pid limit") Cc: Kenny Yu <kennyyu@fb.com> Signed-off-by:
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Tahsin Erdogan authored
commit 320661b0 upstream. Update to pcpu_nr_empty_pop_pages in pcpu_alloc() is currently done without holding pcpu_lock. This can lead to bad updates to the variable. Add missing lock calls. Fixes: b539b87f ("percpu: implmeent pcpu_nr_empty_pop_pages and chunk->nr_populated") Signed-off-by:
Tahsin Erdogan <tahsin@google.com> Signed-off-by:
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Andreas Gruenbacher authored
commit 28ea06c4 upstream. Commit 88ffbf3e switches to using rhashtables for glocks, hashing over the entire struct lm_lockname instead of its individual fields. On some architectures, struct lm_lockname contains a hole of uninitialized memory due to alignment rules, which now leads to incorrect hash values. Get rid of that hole. Signed-off-by:
Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by:
Bob Peterson <rpeterso@redhat.com> Signed-off-by:
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Johan Hovold authored
commit 68c32f9c upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should a malicious device lack endpoints. Fixes: cf7776dc ("[PATCH] isdn4linux: Siemens Gigaset drivers - direct USB connection") Cc: Hansjoerg Lipp <hjlipp@web.de> Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Max Lohrmann authored
commit 13603685 upstream. As reported by Max, the Windows 2008 R2 chkdsk utility expects VERIFY_16 to be supported, and does not handle the returned CHECK_CONDITION properly, resulting in an infinite loop. The kernel will log huge amounts of this error: kernel: TARGET_CORE[iSCSI]: Unsupported SCSI Opcode 0x8f, sending CHECK_CONDITION. Signed-off-by:
Max Lohrmann <post@wickenrode.com> Signed-off-by:
Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by:
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Bart Van Assche authored
commit 8893cf6c upstream. Commit 669f0441 ("scsi: srp_transport: Move queuecommand() wait code to SCSI core") can make scsi_internal_device_block() sleep. However, the mpt3sas driver can call this function from an interrupt handler. Hence add a second argument to scsi_internal_device_block() that restores the old behavior of this function for the mpt3sas handler. The call chain that triggered an "IRQ handler enabled interrupts" complaint is as follows: _base_interrupt() -> _base_async_event() -> mpt3sas_scsih_event_callback() -> _scsih_check_topo_delete_events() -> _scsih_block_io_to_children_attached_directly() -> _scsih_block_io_device() -> _scsih_internal_device_block() -> scsi_internal_device_block() Reported-by:
Omar Sandoval <osandov@osandov.com> Signed-off-by:
Bart Van Assche <bart.vanassche@sandisk.com> Cc: Omar Sandoval <osandov@osandov.com> Cc: Hannes Reinecke <hare@suse.com> Cc: Sagi Grimberg <sagi@grimberg.me> Cc: Christoph Hellwig <hch@lst.de> Cc: Sathya Prakash <sathya.prakash@broadcom.com> Cc: Chaitra P B <chaitra.basappa@broadcom.com> Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com> Cc: Sreekanth Reddy <Sreekanth.Reddy@broadcom.com> Tested-by:
Omar Sandoval <osandov@fb.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
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Chris Leech authored
commit 6f8830f5 upstream. There's a rather long standing regression from the commit "libiscsi: Reduce locking contention in fast path" Depending on iSCSI target behavior, it's possible to hit the case in iscsi_complete_task where the task is still on a pending list (!list_empty(&task->running)). When that happens the task is removed from the list while holding the session back_lock, but other task list modification occur under the frwd_lock. That leads to linked list corruption and eventually a panicked system. Rather than back out the session lock split entirely, in order to try and keep some of the performance gains this patch adds another lock to maintain the task lists integrity. Major enterprise supported kernels have been backing out the lock split for while now, thanks to the efforts at IBM where a lab setup has the most reliable reproducer I've seen on this issue. This patch has been tested there successfully. Signed-off-by:
Chris Leech <cleech@redhat.com> Fixes: 659743b0 ("[SCSI] libiscsi: Reduce locking contention in fast path") Reported-by:
Prashantha Subbarao <psubbara@us.ibm.com> Reviewed-by:
Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> Signed-off-by:
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Anton Blanchard authored
commit 85e8a239 upstream. We see lpfc devices regularly fail during kexec. Fix this by adding a shutdown method which mirrors the remove method. Signed-off-by:
Anton Blanchard <anton@samba.org> Reviewed-by:
Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com> Tested-by:
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Nicholas Bellinger authored
commit a04e54f2 upstream. The following fixes a divide by zero OOPs with TYPE_TAPE due to pscsi_tape_read_blocksize() failing causing a zero sd->sector_size being propigated up via dev_attrib.hw_block_size. It also fixes another long-standing bug where TYPE_TAPE and TYPE_MEDIMUM_CHANGER where using pscsi_create_type_other(), which does not call scsi_device_get() to take the device reference. Instead, rename pscsi_create_type_rom() to pscsi_create_type_nondisk() and use it for all cases. Finally, also drop a dump_stack() in pscsi_get_blocks() for non TYPE_DISK, which in modern target-core can get invoked via target_sense_desc_format() during CHECK_CONDITION. Reported-by:
Malcolm Haak <insanemal@gmail.com> Signed-off-by:
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Shaohua Li authored
commit 61eb2b43 upstream. Neil Brown pointed out a potential deadlock in raid 10 code with bio_split/chain. The raid1 code could have the same issue, but recent barrier rework makes it less likely to happen. The deadlock happens in below sequence: 1. generic_make_request(bio), this will set current->bio_list 2. raid10_make_request will split bio to bio1 and bio2 3. __make_request(bio1), wait_barrer, add underlayer disk bio to current->bio_list 4. __make_request(bio2), wait_barrer If raise_barrier happens between 3 & 4, since wait_barrier runs at 3, raise_barrier waits for IO completion from 3. And since raise_barrier sets barrier, 4 waits for raise_barrier. But IO from 3 can't be dispatched because raid10_make_request() doesn't finished yet. The solution is to adjust the IO ordering. Quotes from Neil: " It is much safer to: if (need to split) { split = bio_split(bio, ...) bio_chain(...) make_request_fn(split); generic_make_request(bio); } else make_request_fn(mddev, bio); This way we first process the initial section of the bio (in 'split') which will queue some requests to the underlying devices. These requests will be queued in generic_make_request. Then we queue the remainder of the bio, which will be added to the end of the generic_make_request queue. Then we return. generic_make_request() will pop the lower-level device requests off the queue and handle them first. Then it will process the remainder of the original bio once the first section has been fully processed. " Note, this only happens in read path. In write path, the bio is flushed to underlaying disks either by blk flush (from schedule) or offladed to raid1/10d. It's queued in current->bio_list. Cc: Coly Li <colyli@suse.de> Suggested-by:
NeilBrown <neilb@suse.com> Reviewed-by:
Jack Wang <jinpu.wang@profitbricks.com> Signed-off-by:
Shaohua Li <shli@fb.com> Signed-off-by:
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Thomas Petazzoni authored
commit b985735b upstream. The INTMASK_REG register does not exist on EIP76. Due to this, the call: omap_rng_write(priv, RNG_INTMASK_REG, RNG_SHUTDOWN_OFLO_MASK); ends up, through the reg_map_eip76[] array, in accessing the register at offset 0, which is the RNG_OUTPUT_0_REG. This by itself doesn't cause any problem, but clearly doesn't enable the interrupt as it was expected. On EIP76, the register that allows to enable the interrupt is RNG_CONTROL_REG. And just like RNG_INTMASK_REG, it's bit 1 of this register that allows to enable the shutdown_oflo interrupt. Fixes: 38321242 ("hwrng: omap - Add device variant for SafeXcel IP-76 found in Armada 8K") Signed-off-by:
Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Thomas Petazzoni authored
commit 761c2510 upstream. The omap-rng driver currently uses of_clk_get() to get a reference to the clock, but never releases that reference. This commit fixes that by using devm_clk_get() instead. Fixes: 38321242 ("hwrng: omap - Add device variant for SafeXcel IP-76 found in Armada 8K") Signed-off-by:
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Thomas Petazzoni authored
commit 45c2fdde upstream. Commit 38321242 ("hwrng: omap - Add device variant for SafeXcel IP-76 found in Armada 8K") added support for the SafeXcel IP-76 variant of the IP. This modification included getting a reference and enabling a clock. Unfortunately, this was done *after* writing to the RNG_INTMASK_REG register. This generally works fine when the driver is built-in because the clock might have been left enabled by the bootloader, but fails short when the driver is built as a module: it causes a system hang because a register is being accessed while the clock is not enabled. This commit fixes that by making the register access *after* enabling the clock. This issue was found by the kernelci.org testing effort. Fixes: 38321242 ("hwrng: omap - Add device variant for SafeXcel IP-76 found in Armada 8K") Signed-off-by:
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Michael Ellerman authored
commit 97ee351b upstream. Recent toolchains force the TOC to be 256 byte aligned. We need to enforce this alignment in the zImage linker script, otherwise pointers to our TOC variables (__toc_start) could be incorrect. If the actual start of the TOC and __toc_start don't have the same value we crash early in the zImage wrapper. Suggested-by:
Alan Modra <amodra@gmail.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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