- 19 Jun, 2020 26 commits
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Ciara Loftus authored
READ_ONCE should be used when reading rings prior to accessing the statistics pointer. Introduce this as well as the corresponding WRITE_ONCE usage when allocating and freeing the rings, to ensure protected access. Signed-off-by:
Ciara Loftus <ciara.loftus@intel.com> Tested-by:
Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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Eric Dumazet authored
Back in commit f60e5990 ("ipv6: protect skb->sk accesses from recursive dereference inside the stack") Hannes added code so that IPv6 stack would not trust skb->sk for typical cases where packet goes through 'standard' xmit path (__dev_queue_xmit()) Alas af_packet had a dev_direct_xmit() path that was not dealing yet with xmit_recursion level. Also change sk_mc_loop() to dump a stack once only. Without this patch, syzbot was able to trigger : [1] [ 153.567378] WARNING: CPU: 7 PID: 11273 at net/core/sock.c:721 sk_mc_loop+0x51/0x70 [ 153.567378] Modules linked in: nfnetlink ip6table_raw ip6table_filter iptable_raw iptable_nat nf_nat nf_conntrack nf_defrag_ipv4 nf_defrag_ipv6 iptable_filter macsec macvtap tap macvlan 8021q hsr wireguard libblake2s blake2s_x86_64 libblake2s_generic udp_tunnel ip6_udp_tunnel libchacha20poly1305 poly1305_x86_64 chacha_x86_64 libchacha curve25519_x86_64 libcurve25519_generic netdevsim batman_adv dummy team bridge stp llc w1_therm wire i2c_mux_pca954x i2c_mux cdc_acm ehci_pci ehci_hcd mlx4_en mlx4_ib ib_uverbs ib_core mlx4_core [ 153.567386] CPU: 7 PID: 11273 Comm: b159172088 Not tainted 5.8.0-smp-DEV #273 [ 153.567387] RIP: 0010:sk_mc_loop+0x51/0x70 [ 153.567388] Code: 66 83 f8 0a 75 24 0f b6 4f 12 b8 01 00 00 00 31 d2 d3 e0 a9 bf ef ff ff 74 07 48 8b 97 f0 02 00 00 0f b6 42 3a 83 e0 01 5d c3 <0f> 0b b8 01 00 00 00 5d c3 0f b6 87 18 03 00 00 5d c0 e8 04 83 e0 [ 153.567388] RSP: 0018:ffff95c69bb93990 EFLAGS: 00010212 [ 153.567388] RAX: 0000000000000011 RBX: ffff95c6e0ee3e00 RCX: 0000000000000007 [ 153.567389] RDX: ffff95c69ae50000 RSI: ffff95c6c30c3000 RDI: ffff95c6c30c3000 [ 153.567389] RBP: ffff95c69bb93990 R08: ffff95c69a77f000 R09: 0000000000000008 [ 153.567389] R10: 0000000000000040 R11: 00003e0e00026128 R12: ffff95c6c30c3000 [ 153.567390] R13: ffff95c6cc4fd500 R14: ffff95c6f84500c0 R15: ffff95c69aa13c00 [ 153.567390] FS: 00007fdc3a283700(0000) GS:ffff95c6ff9c0000(0000) knlGS:0000000000000000 [ 153.567390] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 153.567391] CR2: 00007ffee758e890 CR3: 0000001f9ba20003 CR4: 00000000001606e0 [ 153.567391] Call Trace: [ 153.567391] ip6_finish_output2+0x34e/0x550 [ 153.567391] __ip6_finish_output+0xe7/0x110 [ 153.567391] ip6_finish_output+0x2d/0xb0 [ 153.567392] ip6_output+0x77/0x120 [ 153.567392] ? __ip6_finish_output+0x110/0x110 [ 153.567392] ip6_local_out+0x3d/0x50 [ 153.567392] ipvlan_queue_xmit+0x56c/0x5e0 [ 153.567393] ? ksize+0x19/0x30 [ 153.567393] ipvlan_start_xmit+0x18/0x50 [ 153.567393] dev_direct_xmit+0xf3/0x1c0 [ 153.567393] packet_direct_xmit+0x69/0xa0 [ 153.567394] packet_sendmsg+0xbf0/0x19b0 [ 153.567394] ? plist_del+0x62/0xb0 [ 153.567394] sock_sendmsg+0x65/0x70 [ 153.567394] sock_write_iter+0x93/0xf0 [ 153.567394] new_sync_write+0x18e/0x1a0 [ 153.567395] __vfs_write+0x29/0x40 [ 153.567395] vfs_write+0xb9/0x1b0 [ 153.567395] ksys_write+0xb1/0xe0 [ 153.567395] __x64_sys_write+0x1a/0x20 [ 153.567395] do_syscall_64+0x43/0x70 [ 153.567396] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 153.567396] RIP: 0033:0x453549 [ 153.567396] Code: Bad RIP value. [ 153.567396] RSP: 002b:00007fdc3a282cc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 153.567397] RAX: ffffffffffffffda RBX: 00000000004d32d0 RCX: 0000000000453549 [ 153.567397] RDX: 0000000000000020 RSI: 0000000020000300 RDI: 0000000000000003 [ 153.567398] RBP: 00000000004d32d8 R08: 0000000000000000 R09: 0000000000000000 [ 153.567398] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004d32dc [ 153.567398] R13: 00007ffee742260f R14: 00007fdc3a282dc0 R15: 00007fdc3a283700 [ 153.567399] ---[ end trace c1d5ae2b1059ec62 ]--- f60e5990 ("ipv6: protect skb->sk accesses from recursive dereference inside the stack") Signed-off-by:
Eric Dumazet <edumazet@google.com> Reported-by:
syzbot <syzkaller@googlegroups.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Florian Fainelli authored
of_find_node_by_name() will do an of_node_put() on the "from" argument. With CONFIG_OF_DYNAMIC enabled which checks for device_node reference counts, we would be getting a warning like this: [ 6.347230] refcount_t: increment on 0; use-after-free. [ 6.352498] WARNING: CPU: 3 PID: 77 at lib/refcount.c:156 refcount_inc_checked+0x38/0x44 [ 6.360601] Modules linked in: [ 6.363661] CPU: 3 PID: 77 Comm: kworker/3:1 Tainted: G W 5.4.46-gb78b3e9956e6 #13 [ 6.372546] Hardware name: BCM97278SV (DT) [ 6.376649] Workqueue: events deferred_probe_work_func [ 6.381796] pstate: 60000005 (nZCv daif -PAN -UAO) [ 6.386595] pc : refcount_inc_checked+0x38/0x44 [ 6.391133] lr : refcount_inc_checked+0x38/0x44 ... [ 6.478791] Call trace: [ 6.481243] refcount_inc_checked+0x38/0x44 [ 6.485433] kobject_get+0x3c/0x4c [ 6.488840] of_node_get+0x24/0x34 [ 6.492247] of_irq_find_parent+0x3c/0xe0 [ 6.496263] of_irq_parse_one+0xe4/0x1d0 [ 6.500191] irq_of_parse_and_map+0x44/0x84 [ 6.504381] bcm_sf2_sw_probe+0x22c/0x844 [ 6.508397] platform_drv_probe+0x58/0xa8 [ 6.512413] really_probe+0x238/0x3fc [ 6.516081] driver_probe_device+0x11c/0x12c [ 6.520358] __device_attach_driver+0xa8/0x100 [ 6.524808] bus_for_each_drv+0xb4/0xd0 [ 6.528650] __device_attach+0xd0/0x164 [ 6.532493] device_initial_probe+0x24/0x30 [ 6.536682] bus_probe_device+0x38/0x98 [ 6.540524] deferred_probe_work_func+0xa8/0xd4 [ 6.545061] process_one_work+0x178/0x288 [ 6.549078] process_scheduled_works+0x44/0x48 [ 6.553529] worker_thread+0x218/0x270 [ 6.557285] kthread+0xdc/0xe4 [ 6.560344] ret_from_fork+0x10/0x18 [ 6.563925] ---[ end trace 68f65caf69bb152a ]--- Fix this by adding a of_node_get() to increment the reference count prior to the call. Fixes: afa3b592 ("net: dsa: bcm_sf2: Ensure correct sub-node is parsed") Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Reviewed-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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Alexander Lobakin authored
Commit 3b335832 ("net: Add fraglist GRO/GSO feature flags") missed an entry for NETIF_F_GSO_FRAGLIST in netdev_features_strings array. As a result, fraglist GSO feature is not shown in 'ethtool -k' output and can't be toggled on/off. The fix is trivial. Fixes: 3b335832 ("net: Add fraglist GRO/GSO feature flags") Signed-off-by:
Alexander Lobakin <alobakin@pm.me> Reviewed-by:
Michal Kubecek <mkubecek@suse.cz> Signed-off-by:
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David Christensen authored
The driver function tg3_io_error_detected() calls napi_disable twice, without an intervening napi_enable, when the number of EEH errors exceeds eeh_max_freezes, resulting in an indefinite sleep while holding rtnl_lock. Add check for pcierr_recovery which skips code already executed for the "Frozen" state. Signed-off-by:
David Christensen <drc@linux.vnet.ibm.com> Reviewed-by:
Michael Chan <michael.chan@broadcom.com> Signed-off-by:
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Martin authored
Code to handle multiproto configuration is missing. Fixes: 4b5f6723 ("net: Special handling for IP & MPLS") Signed-off-by:
Martin <martin.varghese@nokia.com> Signed-off-by:
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David S. Miller authored
Julian Wiedmann says: ==================== s390/qeth: fixes 2020-06-17 please apply the following patch series for qeth to netdev's net tree. The first patch fixes a regression in the error handling for a specific cmd type. I have some follow-ups queued up for net-next to clean this up properly... The second patch fine-tunes the HW offload restrictions that went in with this merge window. In some setups we don't need to apply them. ==================== Signed-off-by: -
Julian Wiedmann authored
When a device is configured with ISOLATION_MODE_FWD, traffic never goes through the internal switch. Don't apply the offload restrictions in this case. Fixes: c619e9a6 ("s390/qeth: don't use restricted offloads for local traffic") Signed-off-by:
Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by:
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Julian Wiedmann authored
Current(?) OSA devices also store their cmd-specific return codes for SET_ACCESS_CONTROL cmds into the top-level cmd->hdr.return_code. So once we added stricter checking for the top-level field a while ago, none of the error logic that rolls back the user's configuration to its old state is applied any longer. For this specific cmd, go back to the old model where we peek into the cmd structure even though the top-level field indicated an error. Fixes: 686c97ee ("s390/qeth: fix error handling in adapter command callbacks") Signed-off-by:
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David S. Miller authored
Paolo Abeni says: ==================== mptcp: cope with syncookie on MP_JOINs Currently syncookies on MP_JOIN connections are not handled correctly: the connections fallback to TCP and are kept alive instead of resetting them at fallback time. The first patch propagates the required information up to syn_recv_sock time, and the 2nd patch addresses the unifying the error path for all MP_JOIN requests. ==================== Signed-off-by: -
Paolo Abeni authored
Currently any MPTCP socket using syn cookies will fallback to TCP at 3rd ack time. In case of MP_JOIN requests, the RFC mandate closing the child and sockets, but the existing error paths do not handle the syncookie scenario correctly. Address the issue always forcing the child shutdown in case of MP_JOIN fallback. Fixes: ae2dd716 ("mptcp: handle tcp fallback when using syn cookies") Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Reviewed-by:
Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by:
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Paolo Abeni authored
The msk ownership is transferred to the child socket at 3rd ack time, so that we avoid more lookups later. If the request does not reach the 3rd ack, the MSK reference is dropped at request sock release time. As a side effect, fallback is now tracked by a NULL msk reference instead of zeroed 'mp_join' field. This will simplify the next patch. Signed-off-by:
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guodeqing authored
ie., $ ifconfig eth0 6.6.6.6 netmask 255.255.255.0 $ ip rule add from 6.6.6.6 table 6666 $ ip route add 9.9.9.9 via 6.6.6.6 $ ping -I 6.6.6.6 9.9.9.9 PING 9.9.9.9 (9.9.9.9) from 6.6.6.6 : 56(84) bytes of data. 3 packets transmitted, 0 received, 100% packet loss, time 2079ms $ arp Address HWtype HWaddress Flags Mask Iface 6.6.6.6 (incomplete) eth0 The arp request address is error, this is because fib_table_lookup in fib_check_nh lookup the destnation 9.9.9.9 nexthop, the scope of the fib result is RT_SCOPE_LINK,the correct scope is RT_SCOPE_HOST. Here I add a check of whether this is RT_TABLE_MAIN to solve this problem. Fixes: 3bfd8472 ("net: Use passed in table for nexthop lookups") Signed-off-by:
guodeqing <geffrey.guo@huawei.com> Reviewed-by:
David Ahern <dsahern@gmail.com> Signed-off-by:
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David S. Miller authored
Vladimir Oltean says: ==================== Fix VLAN checks for SJA1105 DSA tc-flower filters This fixes a ridiculous situation where the driver, in VLAN-unaware mode, would refuse accepting any tc filter: tc filter replace dev sw1p3 ingress flower skip_sw \ dst_mac 42:be:24:9b:76:20 \ action gate (...) Error: sja1105: Can only gate based on {DMAC, VID, PCP}. tc filter replace dev sw1p3 ingress protocol 802.1Q flower skip_sw \ vlan_id 1 vlan_prio 0 dst_mac 42:be:24:9b:76:20 \ action gate (...) Error: sja1105: Can only gate based on DMAC. So, without changing the VLAN awareness state, it says it doesn't want VLAN-aware rules, and it doesn't want VLAN-unaware rules either. One would say it's in Schrodinger's state... Now, the situation has been made worse by commit 7f14937f ("net: dsa: sja1105: keep the VLAN awareness state in a driver variable"), which made VLAN awareness a ternary attribute, but after inspecting the code from before that patch with a truth table, it looks like the logical bug was there even before. While attempting to fix this, I also noticed some leftover debugging code in one of the places that needed to be fixed. It would have appeared in the context of patch 3/3 anyway, so I decided to create a patch that removes it. ==================== Signed-off-by: -
Vladimir Oltean authored
This action requires the VLAN awareness state of the switch to be of the same type as the key that's being added: - If the switch is unaware of VLAN, then the tc filter key must only contain the destination MAC address. - If the switch is VLAN-aware, the key must also contain the VLAN ID and PCP. But this check doesn't work unless we verify the VLAN awareness state on both the "if" and the "else" branches. Fixes: 834f8933 ("net: dsa: sja1105: implement tc-gate using time-triggered virtual links") Signed-off-by:
Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by:
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Vladimir Oltean authored
This action requires the VLAN awareness state of the switch to be of the same type as the key that's being added: - If the switch is unaware of VLAN, then the tc filter key must only contain the destination MAC address. - If the switch is VLAN-aware, the key must also contain the VLAN ID and PCP. But this check doesn't work unless we verify the VLAN awareness state on both the "if" and the "else" branches. Fixes: dfacc5a2 ("net: dsa: sja1105: support flow-based redirection via virtual links") Signed-off-by:
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Vladimir Oltean authored
This shouldn't be there. Fixes: 834f8933 ("net: dsa: sja1105: implement tc-gate using time-triggered virtual links") Signed-off-by:
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David S. Miller authored
Davide Caratti says: ==================== two fixes for 'act_gate' control plane - patch 1/2 attempts to fix the error path of tcf_gate_init() when users try to configure 'act_gate' rules with wrong parameters - patch 2/2 is a follow-up of a recent fix for NULL dereference in the error path of tcf_gate_init() further work will introduce a tdc test for 'act_gate'. changes since v2: - fix undefined behavior in patch 1/2 - improve comment in patch 2/2 changes since v1: coding style fixes in patch 1/2 and 2/2 ==================== Signed-off-by: -
Davide Caratti authored
assigning a dummy value of 'clock_id' to avoid cancellation of the cycle timer before its initialization was a temporary solution, and we still need to handle the case where act_gate timer parameters are changed by commands like the following one: # tc action replace action gate <parameters> the fix consists in the following items: 1) remove the workaround assignment of 'clock_id', and init the list of entries before the first error path after IDR atomic check/allocation 2) validate 'clock_id' earlier: there is no need to do IDR atomic check/allocation if we know that 'clock_id' is a bad value 3) use a dedicated function, 'gate_setup_timer()', to ensure that the timer is cancelled and re-initialized on action overwrite, and also ensure we initialize the timer in the error path of tcf_gate_init() v3: improve comment in the error path of tcf_gate_init() (thanks to Vladimir Oltean) v2: avoid 'goto' in gate_setup_timer (thanks to Cong Wang) CC: Ivan Vecera <ivecera@redhat.com> Fixes: a01c2454 ("net/sched: fix a couple of splats in the error path of tfc_gate_init()") Fixes: a51c328d ("net: qos: introduce a gate control flow action") Signed-off-by:Davide Caratti <dcaratti@redhat.com> Acked-by:
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Davide Caratti authored
it is possible to see a KASAN use-after-free, immediately followed by a NULL dereference crash, with the following command: # tc action add action gate index 3 cycle-time 100000000ns \ > cycle-time-ext 100000000ns clockid CLOCK_TAI BUG: KASAN: use-after-free in tcf_action_init_1+0x8eb/0x960 Write of size 1 at addr ffff88810a5908bc by task tc/883 CPU: 0 PID: 883 Comm: tc Not tainted 5.7.0+ #188 Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014 Call Trace: dump_stack+0x75/0xa0 print_address_description.constprop.6+0x1a/0x220 kasan_report.cold.9+0x37/0x7c tcf_action_init_1+0x8eb/0x960 tcf_action_init+0x157/0x2a0 tcf_action_add+0xd9/0x2f0 tc_ctl_action+0x2a3/0x39d rtnetlink_rcv_msg+0x5f3/0x920 netlink_rcv_skb+0x120/0x380 netlink_unicast+0x439/0x630 netlink_sendmsg+0x714/0xbf0 sock_sendmsg+0xe2/0x110 ____sys_sendmsg+0x5b4/0x890 ___sys_sendmsg+0xe9/0x160 __sys_sendmsg+0xd3/0x170 do_syscall_64+0x9a/0x370 entry_SYSCALL_64_after_hwframe+0x44/0xa9 [...] KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077] CPU: 0 PID: 883 Comm: tc Tainted: G B 5.7.0+ #188 Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014 RIP: 0010:tcf_action_fill_size+0xa3/0xf0 [....] RSP: 0018:ffff88813a48f250 EFLAGS: 00010212 RAX: dffffc0000000000 RBX: 0000000000000094 RCX: ffffffffa47c3eb6 RDX: 000000000000000e RSI: 0000000000000008 RDI: 0000000000000070 RBP: ffff88810a590800 R08: 0000000000000004 R09: ffffed1027491e03 R10: 0000000000000003 R11: ffffed1027491e03 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88810a590800 FS: 00007f62cae8ce40(0000) GS:ffff888147c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f62c9d20a10 CR3: 000000013a52a000 CR4: 0000000000340ef0 Call Trace: tcf_action_init+0x172/0x2a0 tcf_action_add+0xd9/0x2f0 tc_ctl_action+0x2a3/0x39d rtnetlink_rcv_msg+0x5f3/0x920 netlink_rcv_skb+0x120/0x380 netlink_unicast+0x439/0x630 netlink_sendmsg+0x714/0xbf0 sock_sendmsg+0xe2/0x110 ____sys_sendmsg+0x5b4/0x890 ___sys_sendmsg+0xe9/0x160 __sys_sendmsg+0xd3/0x170 do_syscall_64+0x9a/0x370 entry_SYSCALL_64_after_hwframe+0x44/0xa9 this is caused by the test on 'cycletime_ext', that is still unassigned when the action is newly created. This makes the action .init() return 0 without calling tcf_idr_insert(), hence the UAF + crash. rework the logic that prevents zero values of cycle-time, as follows: 1) 'tcfg_cycletime_ext' seems to be unused in the action software path, and it was already possible by other means to obtain non-zero cycletime and zero cycletime-ext. So, removing that test should not cause any damage. 2) while at it, we must prevent overwriting configuration data with wrong ones: use a temporary variable for 'tcfg_cycletime', and validate it preserving the original semantic (that allowed computing the cycle time as the sum of all intervals, when not specified by TCA_GATE_CYCLE_TIME). 3) remove the test on 'tcfg_cycletime', no more useful, and avoid returning -EFAULT, which did not seem an appropriate return value for a wrong netlink attribute. v3: fix uninitialized 'cycletime' (thanks to Vladimir Oltean) v2: remove useless 'return;' at the end of void gate_get_start_time() Fixes: a51c328d ("net: qos: introduce a gate control flow action") CC: Ivan Vecera <ivecera@redhat.com> Signed-off-by:
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Taehee Yoo authored
In the datapath, the ip_tunnel_lookup() is used and it internally uses fallback tunnel device pointer, which is fb_tunnel_dev. This pointer variable should be set to NULL when a fb interface is deleted. But there is no routine to set fb_tunnel_dev pointer to NULL. So, this pointer will be still used after interface is deleted and it eventually results in the use-after-free problem. Test commands: ip netns add A ip netns add B ip link add eth0 type veth peer name eth1 ip link set eth0 netns A ip link set eth1 netns B ip netns exec A ip link set lo up ip netns exec A ip link set eth0 up ip netns exec A ip link add gre1 type gre local 10.0.0.1 \ remote 10.0.0.2 ip netns exec A ip link set gre1 up ip netns exec A ip a a 10.0.100.1/24 dev gre1 ip netns exec A ip a a 10.0.0.1/24 dev eth0 ip netns exec B ip link set lo up ip netns exec B ip link set eth1 up ip netns exec B ip link add gre1 type gre local 10.0.0.2 \ remote 10.0.0.1 ip netns exec B ip link set gre1 up ip netns exec B ip a a 10.0.100.2/24 dev gre1 ip netns exec B ip a a 10.0.0.2/24 dev eth1 ip netns exec A hping3 10.0.100.2 -2 --flood -d 60000 & ip netns del B Splat looks like: [ 77.793450][ C3] ================================================================== [ 77.794702][ C3] BUG: KASAN: use-after-free in ip_tunnel_lookup+0xcc4/0xf30 [ 77.795573][ C3] Read of size 4 at addr ffff888060bd9c84 by task hping3/2905 [ 77.796398][ C3] [ 77.796664][ C3] CPU: 3 PID: 2905 Comm: hping3 Not tainted 5.8.0-rc1+ #616 [ 77.797474][ C3] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 77.798453][ C3] Call Trace: [ 77.798815][ C3] <IRQ> [ 77.799142][ C3] dump_stack+0x9d/0xdb [ 77.799605][ C3] print_address_description.constprop.7+0x2cc/0x450 [ 77.800365][ C3] ? ip_tunnel_lookup+0xcc4/0xf30 [ 77.800908][ C3] ? ip_tunnel_lookup+0xcc4/0xf30 [ 77.801517][ C3] ? ip_tunnel_lookup+0xcc4/0xf30 [ 77.802145][ C3] kasan_report+0x154/0x190 [ 77.802821][ C3] ? ip_tunnel_lookup+0xcc4/0xf30 [ 77.803503][ C3] ip_tunnel_lookup+0xcc4/0xf30 [ 77.804165][ C3] __ipgre_rcv+0x1ab/0xaa0 [ip_gre] [ 77.804862][ C3] ? rcu_read_lock_sched_held+0xc0/0xc0 [ 77.805621][ C3] gre_rcv+0x304/0x1910 [ip_gre] [ 77.806293][ C3] ? lock_acquire+0x1a9/0x870 [ 77.806925][ C3] ? gre_rcv+0xfe/0x354 [gre] [ 77.807559][ C3] ? erspan_xmit+0x2e60/0x2e60 [ip_gre] [ 77.808305][ C3] ? rcu_read_lock_sched_held+0xc0/0xc0 [ 77.809032][ C3] ? rcu_read_lock_held+0x90/0xa0 [ 77.809713][ C3] gre_rcv+0x1b8/0x354 [gre] [ ... ] Suggested-by:Eric Dumazet <eric.dumazet@gmail.com> Fixes: c5441932 ("GRE: Refactor GRE tunneling code.") Signed-off-by:
Taehee Yoo <ap420073@gmail.com> Signed-off-by:
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Taehee Yoo authored
In the datapath, the ip6gre_tunnel_lookup() is used and it internally uses fallback tunnel device pointer, which is fb_tunnel_dev. This pointer variable should be set to NULL when a fb interface is deleted. But there is no routine to set fb_tunnel_dev pointer to NULL. So, this pointer will be still used after interface is deleted and it eventually results in the use-after-free problem. Test commands: ip netns add A ip netns add B ip link add eth0 type veth peer name eth1 ip link set eth0 netns A ip link set eth1 netns B ip netns exec A ip link set lo up ip netns exec A ip link set eth0 up ip netns exec A ip link add ip6gre1 type ip6gre local fc:0::1 \ remote fc:0::2 ip netns exec A ip -6 a a fc:100::1/64 dev ip6gre1 ip netns exec A ip link set ip6gre1 up ip netns exec A ip -6 a a fc:0::1/64 dev eth0 ip netns exec A ip link set ip6gre0 up ip netns exec B ip link set lo up ip netns exec B ip link set eth1 up ip netns exec B ip link add ip6gre1 type ip6gre local fc:0::2 \ remote fc:0::1 ip netns exec B ip -6 a a fc:100::2/64 dev ip6gre1 ip netns exec B ip link set ip6gre1 up ip netns exec B ip -6 a a fc:0::2/64 dev eth1 ip netns exec B ip link set ip6gre0 up ip netns exec A ping fc:100::2 -s 60000 & ip netns del B Splat looks like: [ 73.087285][ C1] BUG: KASAN: use-after-free in ip6gre_tunnel_lookup+0x1064/0x13f0 [ip6_gre] [ 73.088361][ C1] Read of size 4 at addr ffff888040559218 by task ping/1429 [ 73.089317][ C1] [ 73.089638][ C1] CPU: 1 PID: 1429 Comm: ping Not tainted 5.7.0+ #602 [ 73.090531][ C1] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 73.091725][ C1] Call Trace: [ 73.092160][ C1] <IRQ> [ 73.092556][ C1] dump_stack+0x96/0xdb [ 73.093122][ C1] print_address_description.constprop.6+0x2cc/0x450 [ 73.094016][ C1] ? ip6gre_tunnel_lookup+0x1064/0x13f0 [ip6_gre] [ 73.094894][ C1] ? ip6gre_tunnel_lookup+0x1064/0x13f0 [ip6_gre] [ 73.095767][ C1] ? ip6gre_tunnel_lookup+0x1064/0x13f0 [ip6_gre] [ 73.096619][ C1] kasan_report+0x154/0x190 [ 73.097209][ C1] ? ip6gre_tunnel_lookup+0x1064/0x13f0 [ip6_gre] [ 73.097989][ C1] ip6gre_tunnel_lookup+0x1064/0x13f0 [ip6_gre] [ 73.098750][ C1] ? gre_del_protocol+0x60/0x60 [gre] [ 73.099500][ C1] gre_rcv+0x1c5/0x1450 [ip6_gre] [ 73.100199][ C1] ? ip6gre_header+0xf00/0xf00 [ip6_gre] [ 73.100985][ C1] ? rcu_read_lock_sched_held+0xc0/0xc0 [ 73.101830][ C1] ? ip6_input_finish+0x5/0xf0 [ 73.102483][ C1] ip6_protocol_deliver_rcu+0xcbb/0x1510 [ 73.103296][ C1] ip6_input_finish+0x5b/0xf0 [ 73.103920][ C1] ip6_input+0xcd/0x2c0 [ 73.104473][ C1] ? ip6_input_finish+0xf0/0xf0 [ 73.105115][ C1] ? rcu_read_lock_held+0x90/0xa0 [ 73.105783][ C1] ? rcu_read_lock_sched_held+0xc0/0xc0 [ 73.106548][ C1] ipv6_rcv+0x1f1/0x300 [ ... ] Suggested-by: -
Taehee Yoo authored
In the current code, ->ndo_start_xmit() can be executed recursively only 10 times because of stack memory. But, in the case of the vxlan, 10 recursion limit value results in a stack overflow. In the current code, the nested interface is limited by 8 depth. There is no critical reason that the recursion limitation value should be 10. So, it would be good to be the same value with the limitation value of nesting interface depth. Test commands: ip link add vxlan10 type vxlan vni 10 dstport 4789 srcport 4789 4789 ip link set vxlan10 up ip a a 192.168.10.1/24 dev vxlan10 ip n a 192.168.10.2 dev vxlan10 lladdr fc:22:33:44:55:66 nud permanent for i in {9..0} do let A=$i+1 ip link add vxlan$i type vxlan vni $i dstport 4789 srcport 4789 4789 ip link set vxlan$i up ip a a 192.168.$i.1/24 dev vxlan$i ip n a 192.168.$i.2 dev vxlan$i lladdr fc:22:33:44:55:66 nud permanent bridge fdb add fc:22:33:44:55:66 dev vxlan$A dst 192.168.$i.2 self done hping3 192.168.10.2 -2 -d 60000 Splat looks like: [ 103.814237][ T1127] ============================================================================= [ 103.871955][ T1127] BUG kmalloc-2k (Tainted: G B ): Padding overwritten. 0x00000000897a2e4f-0x000 [ 103.873187][ T1127] ----------------------------------------------------------------------------- [ 103.873187][ T1127] [ 103.874252][ T1127] INFO: Slab 0x000000005cccc724 objects=5 used=5 fp=0x0000000000000000 flags=0x10000000001020 [ 103.881323][ T1127] CPU: 3 PID: 1127 Comm: hping3 Tainted: G B 5.7.0+ #575 [ 103.882131][ T1127] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 103.883006][ T1127] Call Trace: [ 103.883324][ T1127] dump_stack+0x96/0xdb [ 103.883716][ T1127] slab_err+0xad/0xd0 [ 103.884106][ T1127] ? _raw_spin_unlock+0x1f/0x30 [ 103.884620][ T1127] ? get_partial_node.isra.78+0x140/0x360 [ 103.885214][ T1127] slab_pad_check.part.53+0xf7/0x160 [ 103.885769][ T1127] ? pskb_expand_head+0x110/0xe10 [ 103.886316][ T1127] check_slab+0x97/0xb0 [ 103.886763][ T1127] alloc_debug_processing+0x84/0x1a0 [ 103.887308][ T1127] ___slab_alloc+0x5a5/0x630 [ 103.887765][ T1127] ? pskb_expand_head+0x110/0xe10 [ 103.888265][ T1127] ? lock_downgrade+0x730/0x730 [ 103.888762][ T1127] ? pskb_expand_head+0x110/0xe10 [ 103.889244][ T1127] ? __slab_alloc+0x3e/0x80 [ 103.889675][ T1127] __slab_alloc+0x3e/0x80 [ 103.890108][ T1127] __kmalloc_node_track_caller+0xc7/0x420 [ ... ] Fixes: 11a766ce ("net: Increase xmit RECURSION_LIMIT to 10.") Signed-off-by: -
Yang Yingliang authored
I got a memleak report when doing some fuzz test: unreferenced object 0xffff888112584000 (size 13599): comm "ip", pid 3048, jiffies 4294911734 (age 343.491s) hex dump (first 32 bytes): 74 61 70 30 00 00 00 00 00 00 00 00 00 00 00 00 tap0............ 00 ee d9 19 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace: [<000000002f60ba65>] __kmalloc_node+0x309/0x3a0 [<0000000075b211ec>] kvmalloc_node+0x7f/0xc0 [<00000000d3a97396>] alloc_netdev_mqs+0x76/0xfc0 [<00000000609c3655>] __tun_chr_ioctl+0x1456/0x3d70 [<000000001127ca24>] ksys_ioctl+0xe5/0x130 [<00000000b7d5e66a>] __x64_sys_ioctl+0x6f/0xb0 [<00000000e1023498>] do_syscall_64+0x56/0xa0 [<000000009ec0eb12>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 unreferenced object 0xffff888111845cc0 (size 8): comm "ip", pid 3048, jiffies 4294911734 (age 343.491s) hex dump (first 8 bytes): 74 61 70 30 00 88 ff ff tap0.... backtrace: [<000000004c159777>] kstrdup+0x35/0x70 [<00000000d8b496ad>] kstrdup_const+0x3d/0x50 [<00000000494e884a>] kvasprintf_const+0xf1/0x180 [<0000000097880a2b>] kobject_set_name_vargs+0x56/0x140 [<000000008fbdfc7b>] dev_set_name+0xab/0xe0 [<000000005b99e3b4>] netdev_register_kobject+0xc0/0x390 [<00000000602704fe>] register_netdevice+0xb61/0x1250 [<000000002b7ca244>] __tun_chr_ioctl+0x1cd1/0x3d70 [<000000001127ca24>] ksys_ioctl+0xe5/0x130 [<00000000b7d5e66a>] __x64_sys_ioctl+0x6f/0xb0 [<00000000e1023498>] do_syscall_64+0x56/0xa0 [<000000009ec0eb12>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 unreferenced object 0xffff88811886d800 (size 512): comm "ip", pid 3048, jiffies 4294911734 (age 343.491s) hex dump (first 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N.......... ff ff ff ff ff ff ff ff c0 66 3d a3 ff ff ff ff .........f=..... backtrace: [<0000000050315800>] device_add+0x61e/0x1950 [<0000000021008dfb>] netdev_register_kobject+0x17e/0x390 [<00000000602704fe>] register_netdevice+0xb61/0x1250 [<000000002b7ca244>] __tun_chr_ioctl+0x1cd1/0x3d70 [<000000001127ca24>] ksys_ioctl+0xe5/0x130 [<00000000b7d5e66a>] __x64_sys_ioctl+0x6f/0xb0 [<00000000e1023498>] do_syscall_64+0x56/0xa0 [<000000009ec0eb12>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 If call_netdevice_notifiers() failed, then rollback_registered() calls netdev_unregister_kobject() which holds the kobject. The reference cannot be put because the netdev won't be add to todo list, so it will leads a memleak, we need put the reference to avoid memleak. Reported-by:Hulk Robot <hulkci@huawei.com> Signed-off-by:
Yang Yingliang <yangyingliang@huawei.com> Signed-off-by:
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Sascha Hauer authored
The older SoCs like Armada XP support a 2500BaseX mode in the datasheets referred to as DR-SGMII (Double rated SGMII) or HS-SGMII (High Speed SGMII). This is an upclocked 1000BaseX mode, thus PHY_INTERFACE_MODE_2500BASEX is the appropriate mode define for it. adding support for it merely means writing the correct magic value into the MVNETA_SERDES_CFG register. Signed-off-by:
Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by:
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Sascha Hauer authored
The MVNETA_SERDES_CFG register is only available on older SoCs like the Armada XP. On newer SoCs like the Armada 38x the fields are moved to comphy. This patch moves the writes to this register next to the comphy initialization, so that depending on the SoC either comphy or MVNETA_SERDES_CFG is configured. With this we no longer write to the MVNETA_SERDES_CFG on SoCs where it doesn't exist. Suggested-by:
Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by:
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- 17 Jun, 2020 14 commits
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Shannon Nelson authored
Set up vlan_features for use by any vlans above us. Fixes: beead698 ("ionic: Add the basic NDO callbacks for netdev support") Signed-off-by:
Shannon Nelson <snelson@pensando.io> Acked-by:
Jonathan Toppins <jtoppins@redhat.com> Signed-off-by:
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Shannon Nelson authored
If the driver is busy resetting queues after a change in MTU or queue parameters, don't bother checking the link, wait until the next watchdog cycle. Fixes: 987c0871 ("ionic: check for linkup in watchdog") Signed-off-by:
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Jeremy Kerr authored
Using a AX88179 device (0b95:1790), I see two bytes of appended data on every RX packet. For example, this 48-byte ping, using 0xff as a payload byte: 04:20:22.528472 IP 192.168.1.1 > 192.168.1.2: ICMP echo request, id 2447, seq 1, length 64 0x0000: 000a cd35 ea50 000a cd35 ea4f 0800 4500 0x0010: 0054 c116 4000 4001 f63e c0a8 0101 c0a8 0x0020: 0102 0800 b633 098f 0001 87ea cd5e 0000 0x0030: 0000 dcf2 0600 0000 0000 ffff ffff ffff 0x0040: ffff ffff ffff ffff ffff ffff ffff ffff 0x0050: ffff ffff ffff ffff ffff ffff ffff ffff 0x0060: ffff 961f Those last two bytes - 96 1f - aren't part of the original packet. In the ax88179 RX path, the usbnet rx_fixup function trims a 2-byte 'alignment pseudo header' from the start of the packet, and sets the length from a per-packet field populated by hardware. It looks like that length field *includes* the 2-byte header; the current driver assumes that it's excluded. This change trims the 2-byte alignment header after we've set the packet length, so the resulting packet length is correct. While we're moving the comment around, this also fixes the spelling of 'pseudo'. Signed-off-by:
Jeremy Kerr <jk@ozlabs.org> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfDavid S. Miller authored
Alexei Starovoitov says: ==================== pull-request: bpf 2020-06-17 The following pull-request contains BPF updates for your *net* tree. We've added 10 non-merge commits during the last 2 day(s) which contain a total of 14 files changed, 158 insertions(+), 59 deletions(-). The main changes are: 1) Important fix for bpf_probe_read_kernel_str() return value, from Andrii. 2) [gs]etsockopt fix for large optlen, from Stanislav. 3) devmap allocation fix, from Toke. ==================== Signed-off-by: -
Stanislav Fomichev authored
Extend existing doc with more details about requiring ctx->optlen = 0 for handling optval > PAGE_SIZE. Signed-off-by:
Stanislav Fomichev <sdf@google.com> Signed-off-by:
Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200617010416.93086-3-sdf@google.com
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Stanislav Fomichev authored
We are relying on the fact, that we can pass > sizeof(int) optvals to the SOL_IP+IP_FREEBIND option (the kernel will take first 4 bytes). In the BPF program we check that we can only touch PAGE_SIZE bytes, but the real optlen is PAGE_SIZE * 2. In both cases, we override it to some predefined value and trim the optlen. Also, let's modify exiting IP_TOS usecase to test optlen=0 case where BPF program just bypasses the data as is. Signed-off-by:
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Stanislav Fomichev authored
Attaching to these hooks can break iptables because its optval is usually quite big, or at least bigger than the current PAGE_SIZE limit. David also mentioned some SCTP options can be big (around 256k). For such optvals we expose only the first PAGE_SIZE bytes to the BPF program. BPF program has two options: 1. Set ctx->optlen to 0 to indicate that the BPF's optval should be ignored and the kernel should use original userspace value. 2. Set ctx->optlen to something that's smaller than the PAGE_SIZE. v5: * use ctx->optlen == 0 with trimmed buffer (Alexei Starovoitov) * update the docs accordingly v4: * use temporary buffer to avoid optval == optval_end == NULL; this removes the corner case in the verifier that might assume non-zero PTR_TO_PACKET/PTR_TO_PACKET_END. v3: * don't increase the limit, bypass the argument v2: * proper comments formatting (Jakub Kicinski) Fixes: 0d01da6a ("bpf: implement getsockopt and setsockopt hooks") Signed-off-by:
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Toke Høiland-Jørgensen authored
Syzkaller discovered that creating a hash of type devmap_hash with a large number of entries can hit the memory allocator limit for allocating contiguous memory regions. There's really no reason to use kmalloc_array() directly in the devmap code, so just switch it to the existing bpf_map_area_alloc() function that is used elsewhere. Fixes: 6f9d451a ("xdp: Add devmap_hash map type for looking up devices by hashed index") Reported-by:
Xiumei Mu <xmu@redhat.com> Signed-off-by:
Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by:
John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20200616142829.114173-1-toke@redhat.com
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Hangbin Liu authored
In commit 34cc0b33 we only handled the frame_sz in convert_to_xdp_frame(). This patch will also handle frame_sz in xdp_convert_zc_to_xdp_frame(). Fixes: 34cc0b33 ("xdp: Xdp_frame add member frame_sz and handle in convert_to_xdp_frame") Signed-off-by:
Hangbin Liu <liuhangbin@gmail.com> Signed-off-by:
Jesper Dangaard Brouer <brouer@redhat.com> Acked-by:
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Tobias Klauser authored
Commit c34a06c5 ("tools/bpftool: Add ringbuf map to a list of known map types") added the symbolic "ringbuf" name. Document it in the bpftool map command docs and usage as well. Signed-off-by:
Tobias Klauser <tklauser@distanz.ch> Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
Andrii Nakryiko <andriin@fb.com> Acked-by:
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Andrii Nakryiko authored
During recent refactorings, bpf_probe_read_kernel_str() started returning 0 on success, instead of amount of data successfully read. This majorly breaks applications relying on bpf_probe_read_kernel_str() and bpf_probe_read_str() and their results. Fix this by returning actual number of bytes read. Fixes: 8d92db5c ("bpf: rework the compat kernel probe handling") Signed-off-by:
Christoph Hellwig <hch@lst.de> Acked-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds authored
Pull networking fixes from David Miller: 1) Don't get per-cpu pointer with preemption enabled in nft_set_pipapo, fix from Stefano Brivio. 2) Fix memory leak in ctnetlink, from Pablo Neira Ayuso. 3) Multiple definitions of MPTCP_PM_MAX_ADDR, from Geliang Tang. 4) Accidently disabling NAPI in non-error paths of macb_open(), from Charles Keepax. 5) Fix races between alx_stop and alx_remove, from Zekun Shen. 6) We forget to re-enable SRIOV during resume in bnxt_en driver, from Michael Chan. 7) Fix memory leak in ipv6_mc_destroy_dev(), from Wang Hai. 8) rxtx stats use wrong index in mvpp2 driver, from Sven Auhagen. 9) Fix memory leak in mptcp_subflow_create_socket error path, from Wei Yongjun. 10) We should not adjust the TCP window advertised when sending dup acks in non-SACK mode, because it won't be counted as a dup by the sender if the window size changes. From Eric Dumazet. 11) Destroy the right number of queues during remove in mvpp2 driver, from Sven Auhagen. 12) Various WOL and PM fixes to e1000 driver, from Chen Yu, Vaibhav Gupta, and Arnd Bergmann. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (35 commits) e1000e: fix unused-function warning e1000: use generic power management e1000e: Do not wake up the system via WOL if device wakeup is disabled lan743x: add MODULE_DEVICE_TABLE for module loading alias mlxsw: spectrum: Adjust headroom buffers for 8x ports bareudp: Fixed configuration to avoid having garbage values mvpp2: remove module bugfix tcp: grow window for OOO packets only for SACK flows mptcp: fix memory leak in mptcp_subflow_create_socket() netfilter: flowtable: Make nf_flow_table_offload_add/del_cb inline net/sched: act_ct: Make tcf_ct_flow_table_restore_skb inline net: dsa: sja1105: fix PTP timestamping with large tc-taprio cycles mvpp2: ethtool rxtx stats fix MAINTAINERS: switch to my private email for Renesas Ethernet drivers rocker: fix incorrect error handling in dma_rings_init test_objagg: Fix potential memory leak in error handling net: ethernet: mtk-star-emac: simplify interrupt handling mld: fix memory leak in ipv6_mc_destroy_dev() bnxt_en: Return from timer if interface is not in open state. bnxt_en: Fix AER reset logic on 57500 chips. ... -
git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fsLinus Torvalds authored
Pull AFS fixes from David Howells: "I've managed to get xfstests kind of working with afs. Here are a set of patches that fix most of the bugs found. There are a number of primary issues: - Incorrect handling of mtime and non-handling of ctime. It might be argued, that the latter isn't a bug since the AFS protocol doesn't support ctime, but I should probably still update it locally. - Shared-write mmap, truncate and writeback bugs. This includes not changing i_size under the callback lock, overwriting local i_size with the reply from the server after a partial writeback, not limiting the writeback from an mmapped page to EOF. - Checks for an abort code indicating that the primary vnode in an operation was deleted by a third-party are done in the wrong place. - Silly rename bugs. This includes an incomplete conversion to the new operation handling, duplicate nlink handling, nlink changing not being done inside the callback lock and insufficient handling of third-party conflicting directory changes. And some secondary ones: - The UAEOVERFLOW abort code should map to EOVERFLOW not EREMOTEIO. - Remove a couple of unused or incompletely used bits. - Remove a couple of redundant success checks. These seem to fix all the data-corruption bugs found by ./check -afs -g quick along with the obvious silly rename bugs and time bugs. There are still some test failures, but they seem to fall into two classes: firstly, the authentication/security model is different to the standard UNIX model and permission is arbitrated by the server and cached locally; and secondly, there are a number of features that AFS does not support (such as mknod). But in these cases, the tests themselves need to be adapted or skipped. Using the in-kernel afs client with xfstests also found a bug in the AuriStor AFS server that has been fixed for a future release" * tag 'afs-fixes-20200616' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs: afs: Fix silly rename afs: afs_vnode_commit_status() doesn't need to check the RPC error afs: Fix use of afs_check_for_remote_deletion() afs: Remove afs_operation::abort_code afs: Fix yfs_fs_fetch_status() to honour vnode selector afs: Remove yfs_fs_fetch_file_status() as it's not used afs: Fix the mapping of the UAEOVERFLOW abort code afs: Fix truncation issues and mmap writeback size afs: Concoct ctimes afs: Fix EOF corruption afs: afs_write_end() should change i_size under the right lock afs: Fix non-setting of mtime when writing into mmap -
Randy Dunlap authored
Remove SH-5 documentation index entries following the removal of SH-5 source code. Error: Cannot open file ../arch/sh/mm/tlb-sh5.c Error: Cannot open file ../arch/sh/mm/tlb-sh5.c Error: Cannot open file ../arch/sh/include/asm/tlb_64.h Error: Cannot open file ../arch/sh/include/asm/tlb_64.h Fixes: 3b69e8b4 ("Merge tag 'sh-for-5.8' of git://git.libc.org/linux-sh") Signed-off-by:
Randy Dunlap <rdunlap@infradead.org> Reviewed-by:
Geert Uytterhoeven <geert+renesas@glider.be> Cc: Rich Felker <dalias@libc.org> Cc: Christoph Hellwig <hch@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: ysato@users.sourceforge.jp Cc: linux-sh@vger.kernel.org Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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