- 22 Mar, 2017 23 commits
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Eric Dumazet authored
[ Upstream commit 9ac25fc0 ] TX skbs do not necessarily hold a reference on skb->sk->sk_refcnt By the time TX completion happens, sk_refcnt might be already 0. sock_hold()/sock_put() would then corrupt critical state, like sk_wmem_alloc and lead to leaks or use after free. Fixes: 62bccb8c ("net-timestamp: Make the clone operation stand-alone from phy timestamping") Signed-off-by:
Eric Dumazet <edumazet@google.com> Cc: Alexander Duyck <alexander.h.duyck@intel.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Soheil Hassas Yeganeh <soheil@google.com> Cc: Willem de Bruijn <willemb@google.com> Acked-by:
Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Eric Dumazet authored
[ Upstream commit dd4f1072 ] TX skbs do not necessarily hold a reference on skb->sk->sk_refcnt By the time TX completion happens, sk_refcnt might be already 0. sock_hold()/sock_put() would then corrupt critical state, like sk_wmem_alloc. Fixes: bf7fa551 ("mac80211: Resolve sk_refcnt/sk_wmem_alloc issue in wifi ack path") Signed-off-by:
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Eric Dumazet authored
[ Upstream commit 02b2faaf ] Dmitry Vyukov reported a divide by 0 triggered by syzkaller, exploiting tcp_disconnect() path that was never really considered and/or used before syzkaller ;) I was not able to reproduce the bug, but it seems issues here are the three possible actions that assumed they would never trigger on a listener. 1) tcp_write_timer_handler 2) tcp_delack_timer_handler 3) MTU reduction Only IPv6 MTU reduction was properly testing TCP_CLOSE and TCP_LISTEN states from tcp_v6_mtu_reduced() Signed-off-by:
Dmitry Vyukov <dvyukov@google.com> Signed-off-by:
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WANG Cong authored
[ Upstream commit f78ef7cd ] Fixes: 43a0c675 ("strparser: Stream parser for messages") Cc: Tom Herbert <tom@herbertland.com> Signed-off-by:
Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by:
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Arnaldo Carvalho de Melo authored
[ Upstream commit d5afb6f9 ] The code where sk_clone() came from created a new socket and locked it, but then, on the error path didn't unlock it. This problem stayed there for a long while, till b0691c8e ("net: Unlock sock before calling sk_free()") fixed it, but unfortunately the callers of sk_clone() (now sk_clone_locked()) were not audited and the one in dccp_create_openreq_child() remained. Now in the age of the syskaller fuzzer, this was finally uncovered, as reported by Dmitry: ---- 8< ---- I've got the following report while running syzkaller fuzzer on 86292b33 ("Merge branch 'akpm' (patches from Andrew)") [ BUG: held lock freed! ] 4.10.0+ #234 Not tainted ------------------------- syz-executor6/6898 is freeing memory ffff88006286cac0-ffff88006286d3b7, with a lock still held there! (slock-AF_INET6){+.-...}, at: [<ffffffff8362c2c9>] spin_lock include/linux/spinlock.h:299 [inline] (slock-AF_INET6){+.-...}, at: [<ffffffff8362c2c9>] sk_clone_lock+0x3d9/0x12c0 net/core/sock.c:1504 5 locks held by syz-executor6/6898: #0: (sk_lock-AF_INET6){+.+.+.}, at: [<ffffffff839a34b4>] lock_sock include/net/sock.h:1460 [inline] #0: (sk_lock-AF_INET6){+.+.+.}, at: [<ffffffff839a34b4>] inet_stream_connect+0x44/0xa0 net/ipv4/af_inet.c:681 #1: (rcu_read_lock){......}, at: [<ffffffff83bc1c2a>] inet6_csk_xmit+0x12a/0x5d0 net/ipv6/inet6_connection_sock.c:126 #2: (rcu_read_lock){......}, at: [<ffffffff8369b424>] __skb_unlink include/linux/skbuff.h:1767 [inline] #2: (rcu_read_lock){......}, at: [<ffffffff8369b424>] __skb_dequeue include/linux/skbuff.h:1783 [inline] #2: (rcu_read_lock){......}, at: [<ffffffff8369b424>] process_backlog+0x264/0x730 net/core/dev.c:4835 #3: (rcu_read_lock){......}, at: [<ffffffff83aeb5c0>] ip6_input_finish+0x0/0x1700 net/ipv6/ip6_input.c:59 #4: (slock-AF_INET6){+.-...}, at: [<ffffffff8362c2c9>] spin_lock include/linux/spinlock.h:299 [inline] #4: (slock-AF_INET6){+.-...}, at: [<ffffffff8362c2c9>] sk_clone_lock+0x3d9/0x12c0 net/core/sock.c:1504 Fix it just like was done by b0691c8e ("net: Unlock sock before calling sk_free()"). Reported-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by:
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Eric Dumazet authored
[ Upstream commit 48cac18e ] Andrey reported a use-after-free in IPv6 stack. Issue here is that we free the socket while it still has skb in TX path and in some queues. It happens here because IPv6 reassembly unit messes skb->truesize, breaking skb_set_owner_w() badly. We fixed a similar issue for IPV4 in commit 8282f274 ("inet: frag: Always orphan skbs inside ip_defrag()") Acked-by:
Joe Stringer <joe@ovn.org> ================================================================== BUG: KASAN: use-after-free in sock_wfree+0x118/0x120 Read of size 8 at addr ffff880062da0060 by task a.out/4140 page:ffffea00018b6800 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 flags: 0x100000000008100(slab|head) raw: 0100000000008100 0000000000000000 0000000000000000 0000000180130013 raw: dead000000000100 dead000000000200 ffff88006741f140 0000000000000000 page dumped because: kasan: bad access detected CPU: 0 PID: 4140 Comm: a.out Not tainted 4.10.0-rc3+ #59 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:15 dump_stack+0x292/0x398 lib/dump_stack.c:51 describe_address mm/kasan/report.c:262 kasan_report_error+0x121/0x560 mm/kasan/report.c:370 kasan_report mm/kasan/report.c:392 __asan_report_load8_noabort+0x3e/0x40 mm/kasan/report.c:413 sock_flag ./arch/x86/include/asm/bitops.h:324 sock_wfree+0x118/0x120 net/core/sock.c:1631 skb_release_head_state+0xfc/0x250 net/core/skbuff.c:655 skb_release_all+0x15/0x60 net/core/skbuff.c:668 __kfree_skb+0x15/0x20 net/core/skbuff.c:684 kfree_skb+0x16e/0x4e0 net/core/skbuff.c:705 inet_frag_destroy+0x121/0x290 net/ipv4/inet_fragment.c:304 inet_frag_put ./include/net/inet_frag.h:133 nf_ct_frag6_gather+0x1125/0x38b0 net/ipv6/netfilter/nf_conntrack_reasm.c:617 ipv6_defrag+0x21b/0x350 net/ipv6/netfilter/nf_defrag_ipv6_hooks.c:68 nf_hook_entry_hookfn ./include/linux/netfilter.h:102 nf_hook_slow+0xc3/0x290 net/netfilter/core.c:310 nf_hook ./include/linux/netfilter.h:212 __ip6_local_out+0x52c/0xaf0 net/ipv6/output_core.c:160 ip6_local_out+0x2d/0x170 net/ipv6/output_core.c:170 ip6_send_skb+0xa1/0x340 net/ipv6/ip6_output.c:1722 ip6_push_pending_frames+0xb3/0xe0 net/ipv6/ip6_output.c:1742 rawv6_push_pending_frames net/ipv6/raw.c:613 rawv6_sendmsg+0x2cff/0x4130 net/ipv6/raw.c:927 inet_sendmsg+0x164/0x5b0 net/ipv4/af_inet.c:744 sock_sendmsg_nosec net/socket.c:635 sock_sendmsg+0xca/0x110 net/socket.c:645 sock_write_iter+0x326/0x620 net/socket.c:848 new_sync_write fs/read_write.c:499 __vfs_write+0x483/0x760 fs/read_write.c:512 vfs_write+0x187/0x530 fs/read_write.c:560 SYSC_write fs/read_write.c:607 SyS_write+0xfb/0x230 fs/read_write.c:599 entry_SYSCALL_64_fastpath+0x1f/0xc2 arch/x86/entry/entry_64.S:203 RIP: 0033:0x7ff26e6f5b79 RSP: 002b:00007ff268e0ed98 EFLAGS: 00000206 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ff268e0f9c0 RCX: 00007ff26e6f5b79 RDX: 0000000000000010 RSI: 0000000020f50fe1 RDI: 0000000000000003 RBP: 00007ff26ebc1220 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007ff268e0f9c0 R14: 00007ff26efec040 R15: 0000000000000003 The buggy address belongs to the object at ffff880062da0000 which belongs to the cache RAWv6 of size 1504 The buggy address ffff880062da0060 is located 96 bytes inside of 1504-byte region [ffff880062da0000, ffff880062da05e0) Freed by task 4113: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:502 set_track mm/kasan/kasan.c:514 kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:578 slab_free_hook mm/slub.c:1352 slab_free_freelist_hook mm/slub.c:1374 slab_free mm/slub.c:2951 kmem_cache_free+0xb2/0x2c0 mm/slub.c:2973 sk_prot_free net/core/sock.c:1377 __sk_destruct+0x49c/0x6e0 net/core/sock.c:1452 sk_destruct+0x47/0x80 net/core/sock.c:1460 __sk_free+0x57/0x230 net/core/sock.c:1468 sk_free+0x23/0x30 net/core/sock.c:1479 sock_put ./include/net/sock.h:1638 sk_common_release+0x31e/0x4e0 net/core/sock.c:2782 rawv6_close+0x54/0x80 net/ipv6/raw.c:1214 inet_release+0xed/0x1c0 net/ipv4/af_inet.c:425 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:431 sock_release+0x8d/0x1e0 net/socket.c:599 sock_close+0x16/0x20 net/socket.c:1063 __fput+0x332/0x7f0 fs/file_table.c:208 ____fput+0x15/0x20 fs/file_table.c:244 task_work_run+0x19b/0x270 kernel/task_work.c:116 exit_task_work ./include/linux/task_work.h:21 do_exit+0x186b/0x2800 kernel/exit.c:839 do_group_exit+0x149/0x420 kernel/exit.c:943 SYSC_exit_group kernel/exit.c:954 SyS_exit_group+0x1d/0x20 kernel/exit.c:952 entry_SYSCALL_64_fastpath+0x1f/0xc2 arch/x86/entry/entry_64.S:203 Allocated by task 4115: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:502 set_track mm/kasan/kasan.c:514 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:605 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:544 slab_post_alloc_hook mm/slab.h:432 slab_alloc_node mm/slub.c:2708 slab_alloc mm/slub.c:2716 kmem_cache_alloc+0x1af/0x250 mm/slub.c:2721 sk_prot_alloc+0x65/0x2a0 net/core/sock.c:1334 sk_alloc+0x105/0x1010 net/core/sock.c:1396 inet6_create+0x44d/0x1150 net/ipv6/af_inet6.c:183 __sock_create+0x4f6/0x880 net/socket.c:1199 sock_create net/socket.c:1239 SYSC_socket net/socket.c:1269 SyS_socket+0xf9/0x230 net/socket.c:1249 entry_SYSCALL_64_fastpath+0x1f/0xc2 arch/x86/entry/entry_64.S:203 Memory state around the buggy address: ffff880062d9ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff880062d9ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff880062da0000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff880062da0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff880062da0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Reported-by:
Andrey Konovalov <andreyknvl@google.com> Signed-off-by:
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Eric Dumazet authored
[ Upstream commit 13baa00a ] It is now very clear that silly TCP listeners might play with enabling/disabling timestamping while new children are added to their accept queue. Meaning net_enable_timestamp() can be called from BH context while current state of the static key is not enabled. Lets play safe and allow all contexts. The work queue is scheduled only under the problematic cases, which are the static key enable/disable transition, to not slow down critical paths. This extends and improves what we did in commit 5fa8bbda ("net: use a work queue to defer net_disable_timestamp() work") Fixes: b90e5794 ("net: dont call jump_label_dec from irq context") Signed-off-by:
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Alexander Potapenko authored
[ Upstream commit 540e2894 ] KMSAN (KernelMemorySanitizer, a new error detection tool) reports use of uninitialized memory in packet_bind_spkt(): Acked-by:
Alexander Potapenko <glider@google.com> Signed-off-by:
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Mike Manning authored
[ Upstream commit 8953de2f ] Even with multicast flooding turned off, IPv6 ND should still work so that IPv6 connectivity is provided. Allow this by continuing to flood multicast traffic originated by us. Fixes: b6cb5ac8 ("net: bridge: add per-port multicast flood flag") Cc: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by:
Mike Manning <mmanning@brocade.com> Acked-by:
Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by:
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Eric Dumazet authored
[ Upstream commit 449809a6 ] SYN processing really was meant to be handled from BH. When I got rid of BH blocking while processing socket backlog in commit 5413d1ba ("net: do not block BH while processing socket backlog"), I forgot that a malicious user could transition to TCP_LISTEN from a state that allowed (SYN) packets to be parked in the socket backlog while socket is owned by the thread doing the listen() call. Sure enough syzkaller found this and reported the bug ;) ================================= [ INFO: inconsistent lock state ] 4.10.0+ #60 Not tainted --------------------------------- inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage. syz-executor0/5090 [HC0[0]:SC0[0]:HE1:SE1] takes: (&(&hashinfo->ehash_locks[i])->rlock){+.?...}, at: [<ffffffff83a6a370>] spin_lock include/linux/spinlock.h:299 [inline] (&(&hashinfo->ehash_locks[i])->rlock){+.?...}, at: [<ffffffff83a6a370>] inet_ehash_insert+0x240/0xad0 net/ipv4/inet_hashtables.c:407 {IN-SOFTIRQ-W} state was registered at: mark_irqflags kernel/locking/lockdep.c:2923 [inline] __lock_acquire+0xbcf/0x3270 kernel/locking/lockdep.c:3295 lock_acquire+0x241/0x580 kernel/locking/lockdep.c:3753 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x33/0x50 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:299 [inline] inet_ehash_insert+0x240/0xad0 net/ipv4/inet_hashtables.c:407 reqsk_queue_hash_req net/ipv4/inet_connection_sock.c:753 [inline] inet_csk_reqsk_queue_hash_add+0x1b7/0x2a0 net/ipv4/inet_connection_sock.c:764 tcp_conn_request+0x25cc/0x3310 net/ipv4/tcp_input.c:6399 tcp_v4_conn_request+0x157/0x220 net/ipv4/tcp_ipv4.c:1262 tcp_rcv_state_process+0x802/0x4130 net/ipv4/tcp_input.c:5889 tcp_v4_do_rcv+0x56b/0x940 net/ipv4/tcp_ipv4.c:1433 tcp_v4_rcv+0x2e12/0x3210 net/ipv4/tcp_ipv4.c:1711 ip_local_deliver_finish+0x4ce/0xc40 net/ipv4/ip_input.c:216 NF_HOOK include/linux/netfilter.h:257 [inline] ip_local_deliver+0x1ce/0x710 net/ipv4/ip_input.c:257 dst_input include/net/dst.h:492 [inline] ip_rcv_finish+0xb1d/0x2110 net/ipv4/ip_input.c:396 NF_HOOK include/linux/netfilter.h:257 [inline] ip_rcv+0xd90/0x19c0 net/ipv4/ip_input.c:487 __netif_receive_skb_core+0x1ad1/0x3400 net/core/dev.c:4179 __netif_receive_skb+0x2a/0x170 net/core/dev.c:4217 netif_receive_skb_internal+0x1d6/0x430 net/core/dev.c:4245 napi_skb_finish net/core/dev.c:4602 [inline] napi_gro_receive+0x4e6/0x680 net/core/dev.c:4636 e1000_receive_skb drivers/net/ethernet/intel/e1000/e1000_main.c:4033 [inline] e1000_clean_rx_irq+0x5e0/0x1490 drivers/net/ethernet/intel/e1000/e1000_main.c:4489 e1000_clean+0xb9a/0x2910 drivers/net/ethernet/intel/e1000/e1000_main.c:3834 napi_poll net/core/dev.c:5171 [inline] net_rx_action+0xe70/0x1900 net/core/dev.c:5236 __do_softirq+0x2fb/0xb7d kernel/softirq.c:284 invoke_softirq kernel/softirq.c:364 [inline] irq_exit+0x19e/0x1d0 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:658 [inline] do_IRQ+0x81/0x1a0 arch/x86/kernel/irq.c:250 ret_from_intr+0x0/0x20 native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:53 arch_safe_halt arch/x86/include/asm/paravirt.h:98 [inline] default_idle+0x8f/0x410 arch/x86/kernel/process.c:271 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:262 default_idle_call+0x36/0x60 kernel/sched/idle.c:96 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x348/0x440 kernel/sched/idle.c:243 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:345 start_secondary+0x344/0x440 arch/x86/kernel/smpboot.c:272 verify_cpu+0x0/0xfc irq event stamp: 1741 hardirqs last enabled at (1741): [<ffffffff84d49d77>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (1741): [<ffffffff84d49d77>] _raw_spin_unlock_irqrestore+0xf7/0x1a0 kernel/locking/spinlock.c:191 hardirqs last disabled at (1740): [<ffffffff84d4a732>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (1740): [<ffffffff84d4a732>] _raw_spin_lock_irqsave+0xa2/0x110 kernel/locking/spinlock.c:159 softirqs last enabled at (1738): [<ffffffff84d4deff>] __do_softirq+0x7cf/0xb7d kernel/softirq.c:310 softirqs last disabled at (1571): [<ffffffff84d4b92c>] do_softirq_own_stack+0x1c/0x30 arch/x86/entry/entry_64.S:902 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&(&hashinfo->ehash_locks[i])->rlock); <Interrupt> lock(&(&hashinfo->ehash_locks[i])->rlock); *** DEADLOCK *** 1 lock held by syz-executor0/5090: #0: (sk_lock-AF_INET6){+.+.+.}, at: [<ffffffff83406b43>] lock_sock include/net/sock.h:1460 [inline] #0: (sk_lock-AF_INET6){+.+.+.}, at: [<ffffffff83406b43>] sock_setsockopt+0x233/0x1e40 net/core/sock.c:683 stack backtrace: CPU: 1 PID: 5090 Comm: syz-executor0 Not tainted 4.10.0+ #60 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:15 [inline] dump_stack+0x292/0x398 lib/dump_stack.c:51 print_usage_bug+0x3ef/0x450 kernel/locking/lockdep.c:2387 valid_state kernel/locking/lockdep.c:2400 [inline] mark_lock_irq kernel/locking/lockdep.c:2602 [inline] mark_lock+0xf30/0x1410 kernel/locking/lockdep.c:3065 mark_irqflags kernel/locking/lockdep.c:2941 [inline] __lock_acquire+0x6dc/0x3270 kernel/locking/lockdep.c:3295 lock_acquire+0x241/0x580 kernel/locking/lockdep.c:3753 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x33/0x50 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:299 [inline] inet_ehash_insert+0x240/0xad0 net/ipv4/inet_hashtables.c:407 reqsk_queue_hash_req net/ipv4/inet_connection_sock.c:753 [inline] inet_csk_reqsk_queue_hash_add+0x1b7/0x2a0 net/ipv4/inet_connection_sock.c:764 dccp_v6_conn_request+0xada/0x11b0 net/dccp/ipv6.c:380 dccp_rcv_state_process+0x51e/0x1660 net/dccp/input.c:606 dccp_v6_do_rcv+0x213/0x350 net/dccp/ipv6.c:632 sk_backlog_rcv include/net/sock.h:896 [inline] __release_sock+0x127/0x3a0 net/core/sock.c:2052 release_sock+0xa5/0x2b0 net/core/sock.c:2539 sock_setsockopt+0x60f/0x1e40 net/core/sock.c:1016 SYSC_setsockopt net/socket.c:1782 [inline] SyS_setsockopt+0x2fb/0x3a0 net/socket.c:1765 entry_SYSCALL_64_fastpath+0x1f/0xc2 RIP: 0033:0x4458b9 RSP: 002b:00007fe8b26c2b58 EFLAGS: 00000292 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00000000004458b9 RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000006 RBP: 00000000006e2110 R08: 0000000000000010 R09: 0000000000000000 R10: 00000000208c3000 R11: 0000000000000292 R12: 0000000000708000 R13: 0000000020000000 R14: 0000000000001000 R15: 0000000000000000 Fixes: 5413d1ba ("net: do not block BH while processing socket backlog") Signed-off-by:
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Ido Schimmel authored
[ Upstream commit f7df4923 ] When the structure of the LPM tree changes (f.e., due to the addition of a new prefix), we unbind the old tree and then bind the new one. This may result in temporary packet loss. Instead, overwrite the old binding with the new one. Fixes: 6b75c480 ("mlxsw: spectrum_router: Add virtual router management") Signed-off-by:
Ido Schimmel <idosch@mellanox.com> Signed-off-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
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Jakub Kicinski authored
[ Upstream commit a717e3f7 ] There is no guarantees that callers of the TX path will hold the RCU lock. Grab it explicitly. Fixes: fceb9c3e ("geneve: avoid using stale geneve socket.") Signed-off-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by:
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Jakub Kicinski authored
[ Upstream commit 56de859e ] There is no guarantees that callers of the TX path will hold the RCU lock. Grab it explicitly. Fixes: c6fcc4fc ("vxlan: avoid using stale vxlan socket.") Signed-off-by:
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Florian Fainelli authored
[ Upstream commit eab12771 ] phy_error() is called in the PHY state machine workqueue context, and calls phy_trigger_machine() which does a cancel_delayed_work_sync() of the workqueue we execute from, causing a deadlock situation. Augment phy_trigger_machine() machine with a sync boolean indicating whether we should use cancel_*_sync() or just cancel_*_work(). Fixes: 3c293f4e ("net: phy: Trigger state machine on state change and not polling.") Reported-by:
Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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Paul Hüber authored
[ Upstream commit 51fb60eb ] l2tp_ip_backlog_recv may not return -1 if the packet gets dropped. The return value is passed up to ip_local_deliver_finish, which treats negative values as an IP protocol number for resubmission. Signed-off-by:
Paul Hüber <phueber@kernsp.in> Signed-off-by:
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Roman Mashak authored
[ Upstream commit edb9d1bf ] When tc actions are loaded as a module and no actions have been installed, flushing them would result in actions removed from the memory, but modules reference count not being decremented, so that the modules would not be unloaded. Following is example with GACT action: % sudo modprobe act_gact % lsmod Module Size Used by act_gact 16384 0 % % sudo tc actions ls action gact % % sudo tc actions flush action gact % lsmod Module Size Used by act_gact 16384 1 % sudo tc actions flush action gact % lsmod Module Size Used by act_gact 16384 2 % sudo rmmod act_gact rmmod: ERROR: Module act_gact is in use .... After the fix: % lsmod Module Size Used by act_gact 16384 0 % % sudo tc actions add action pass index 1 % sudo tc actions add action pass index 2 % sudo tc actions add action pass index 3 % lsmod Module Size Used by act_gact 16384 3 % % sudo tc actions flush action gact % lsmod Module Size Used by act_gact 16384 0 % % sudo tc actions flush action gact % lsmod Module Size Used by act_gact 16384 0 % sudo rmmod act_gact % lsmod Module Size Used by % Fixes: f97017cd ("net-sched: Fix actions flushing") Signed-off-by:
Roman Mashak <mrv@mojatatu.com> Signed-off-by:
Jamal Hadi Salim <jhs@mojatatu.com> Acked-by:
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Julian Anastasov authored
[ Upstream commit 6e28099d ] Restore the lost masking of TOS in input route code to allow ip rules to match it properly. Problem [1] noticed by Shmulik Ladkani <shmulik.ladkani@gmail.com> [1] http://marc.info/?t=137331755300040&r=1&w=2 Fixes: 89aef892 ("ipv4: Delete routing cache.") Signed-off-by:
Julian Anastasov <ja@ssi.bg> Signed-off-by:
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Brian Russell authored
[ Upstream commit 1158632b ] When using IPv6 transport and a default dst, a pointer to the configured source address is passed into the route lookup. If no source address is configured, then the value is overwritten. IPv6 route lookup ignores egress ifindex match if the source address is set, so if egress ifindex match is desired, the source address must be passed as any. The overwrite breaks this for subsequent lookups. Avoid this by copying the configured address to an existing stack variable and pass a pointer to that instead. Fixes: 272d96a5 ("net: vxlan: lwt: Use source ip address during route lookup.") Signed-off-by:
Brian Russell <brussell@brocade.com> Acked-by:
Jiri Benc <jbenc@redhat.com> Signed-off-by:
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David Forster authored
[ Upstream commit 7dcdf941 ] Align vti6 with vti by returning GRE_KEY flag. This enables iproute2 to display tunnel keys on "ip -6 tunnel show" Signed-off-by:
David Forster <dforster@brocade.com> Signed-off-by:
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Matthias Schiffer authored
[ Upstream commit 4e37d691 ] The incorrect check caused an off-by-one error: the maximum VID 0xffffff was unusable. Fixes: d342894c ("vxlan: virtual extensible lan") Signed-off-by:
Matthias Schiffer <mschiffer@universe-factory.net> Acked-by:
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Tariq Toukan authored
[ Upstream commit 36154be4 ] In cqe compression with striding RQ, the decompression of the CQE field wqe_counter was done with a wrong wraparound value. This caused handling cqes with a wrong pointer to wqe (rx descriptor) and creating SKBs with wrong data, pointing to wrong (and already consumed) strides/pages. The meaning of the CQE field wqe_counter in striding RQ holds the stride index instead of the WQE index. Hence, when decompressing a CQE, wqe_counter should have wrapped-around the number of strides in a single multi-packet WQE. We dropped this wrap-around mask at all in CQE decompression of striding RQ. It is not needed as in such cases the CQE compression session would break because of different value of wqe_id field, starting a new compression session. Tested: ethtool -K ethxx lro off/on ethtool --set-priv-flags ethxx rx_cqe_compress on super_netperf 16 {ipv4,ipv6} -t TCP_STREAM -m 50 -D verified no csum errors and no page refcount issues. Fixes: 7219ab34 ("net/mlx5e: CQE compression") Signed-off-by:
Tariq Toukan <tariqt@mellanox.com> Reported-by:
Tom Herbert <tom@herbertland.com> Cc: kernel-team@fb.com Signed-off-by:
Saeed Mahameed <saeedm@mellanox.com> Signed-off-by:
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Tariq Toukan authored
[ Upstream commit 4078e637 ] When rq_type is Striding RQ, no room of SKB_RESERVE is needed as SKB allocation is not done via build_skb. Fixes: e4b85508 ("net/mlx5e: Slightly reduce hardware LRO size") Signed-off-by:
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Saeed Mahameed authored
[ Upstream commit 6f08a22c ] Currently vport representors are added only on driver load and removed on driver unload. Apparently we forgot to handle them when we added the seamless reset flow feature. This caused to leave the representors netdevs alive and active with open HW resources on pci shutdown and on error reset flows. To overcome this we move their handling to interface attach/detach, so they would be cleaned up on shutdown and recreated on reset flows. Fixes: 26e59d80 ("net/mlx5e: Implement mlx5e interface attach/detach callbacks") Signed-off-by:
Hadar Hen Zion <hadarh@mellanox.com> Reviewed-by:
Roi Dayan <roid@mellanox.com> Signed-off-by:
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- 18 Mar, 2017 17 commits
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Greg Kroah-Hartman authored
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Kamal Heib authored
commit 45bded2c upstream. Make sure that the Q counters are supported by the FW before trying to allocate/deallocte them, this will avoid driver load failure when they aren't supported by the FW. Fixes: 0837e86a ('IB/mlx5: Add per port counters') Signed-off-by:
Kamal Heib <kamalh@mellanox.com> Reviewed-by:
Mark Bloch <markb@mellanox.com> Signed-off-by:
Leon Romanovsky <leon@kernel.org> Signed-off-by:
Doug Ledford <dledford@redhat.com> Signed-off-by:
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Theodore Ts'o authored
commit 0d06863f upstream. Fix a BUG when the kernel tries to mount a file system constructed as follows: echo foo > foo.txt mke2fs -Fq -t ext4 -O encrypt foo.img 100 debugfs -w foo.img << EOF write foo.txt a set_inode_field a i_flags 0x80800 set_super_value s_last_orphan 12 quit EOF root@kvm-xfstests:~# mount -o loop foo.img /mnt [ 160.238770] ------------[ cut here ]------------ [ 160.240106] kernel BUG at /usr/projects/linux/ext4/fs/ext4/inode.c:3874! [ 160.240106] invalid opcode: 0000 [#1] SMP [ 160.240106] Modules linked in: [ 160.240106] CPU: 0 PID: 2547 Comm: mount Tainted: G W 4.10.0-rc3-00034-gcdd33b941b67 #227 [ 160.240106] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.1-1 04/01/2014 [ 160.240106] task: f4518000 task.stack: f47b6000 [ 160.240106] EIP: ext4_block_zero_page_range+0x1a7/0x2b4 [ 160.240106] EFLAGS: 00010246 CPU: 0 [ 160.240106] EAX: 00000001 EBX: f7be4b50 ECX: f47b7dc0 EDX: 00000007 [ 160.240106] ESI: f43b05a8 EDI: f43babec EBP: f47b7dd0 ESP: f47b7dac [ 160.240106] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 [ 160.240106] CR0: 80050033 CR2: bfd85b08 CR3: 34a00680 CR4: 000006f0 [ 160.240106] Call Trace: [ 160.240106] ext4_truncate+0x1e9/0x3e5 [ 160.240106] ext4_fill_super+0x286f/0x2b1e [ 160.240106] ? set_blocksize+0x2e/0x7e [ 160.240106] mount_bdev+0x114/0x15f [ 160.240106] ext4_mount+0x15/0x17 [ 160.240106] ? ext4_calculate_overhead+0x39d/0x39d [ 160.240106] mount_fs+0x58/0x115 [ 160.240106] vfs_kern_mount+0x4b/0xae [ 160.240106] do_mount+0x671/0x8c3 [ 160.240106] ? _copy_from_user+0x70/0x83 [ 160.240106] ? strndup_user+0x31/0x46 [ 160.240106] SyS_mount+0x57/0x7b [ 160.240106] do_int80_syscall_32+0x4f/0x61 [ 160.240106] entry_INT80_32+0x2f/0x2f [ 160.240106] EIP: 0xb76b919e [ 160.240106] EFLAGS: 00000246 CPU: 0 [ 160.240106] EAX: ffffffda EBX: 08053838 ECX: 08052188 EDX: 080537e8 [ 160.240106] ESI: c0ed0000 EDI: 00000000 EBP: 080537e8 ESP: bfa13660 [ 160.240106] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b [ 160.240106] Code: 59 8b 00 a8 01 0f 84 09 01 00 00 8b 07 66 25 00 f0 66 3d 00 80 75 61 89 f8 e8 3e e2 ff ff 84 c0 74 56 83 bf 48 02 00 00 00 75 02 <0f> 0b 81 7d e8 00 10 00 00 74 02 0f 0b 8b 43 04 8b 53 08 31 c9 [ 160.240106] EIP: ext4_block_zero_page_range+0x1a7/0x2b4 SS:ESP: 0068:f47b7dac [ 160.317241] ---[ end trace d6a773a375c810a5 ]--- The problem is that when the kernel tries to truncate an inode in ext4_truncate(), it tries to clear any on-disk data beyond i_size. Without the encryption key, it can't do that, and so it triggers a BUG. E2fsck does *not* provide this service, and in practice most file systems have their orphan list processed by e2fsck, so to avoid crashing, this patch skips this step if we don't have access to the encryption key (which is the case when processing the orphan list; in all other cases, we will have the encryption key, or the kernel wouldn't have allowed the file to be opened). An open question is whether the fact that e2fsck isn't clearing the bytes beyond i_size causing problems --- and if we've lived with it not doing it for so long, can we drop this from the kernel replay of the orphan list in all cases (not just when we don't have the key for encrypted inodes). Addresses-Google-Bug: #35209576 Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Signed-off-by:
Eric Biggers <ebiggers@google.com> Signed-off-by:
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Sean Young authored
commit 41380868 upstream. When the protocol is set via the sysfs protocols attribute, the decoder is loaded. However, when it is not when a device is first plugged in or registered. Fixes: acc1c3c6 ("[media] media: rc: load decoder modules on-demand") Signed-off-by:
Sean Young <sean@mess.org> Signed-off-by:
Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by:
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Mikulas Patocka authored
commit d67a5f4b upstream. Commit df2cb6da ("block: Avoid deadlocks with bio allocation by stacking drivers") created a workqueue for every bio set and code in bio_alloc_bioset() that tries to resolve some low-memory deadlocks by redirecting bios queued on current->bio_list to the workqueue if the system is low on memory. However other deadlocks (see below **) may happen, without any low memory condition, because generic_make_request is queuing bios to current->bio_list (rather than submitting them). ** the related dm-snapshot deadlock is detailed here: https://www.redhat.com/archives/dm-devel/2016-July/msg00065.html Fix this deadlock by redirecting any bios on current->bio_list to the bio_set's rescue workqueue on every schedule() call. Consequently, when the process blocks on a mutex, the bios queued on current->bio_list are dispatched to independent workqueus and they can complete without waiting for the mutex to be available. The structure blk_plug contains an entry cb_list and this list can contain arbitrary callback functions that are called when the process blocks. To implement this fix DM (ab)uses the onstack plug's cb_list interface to get its flush_current_bio_list() called at schedule() time. This fixes the snapshot deadlock - if the map method blocks, flush_current_bio_list() will be called and it redirects bios waiting on current->bio_list to appropriate workqueues. Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1267650 Depends-on: df2cb6da ("block: Avoid deadlocks with bio allocation by stacking drivers") Signed-off-by:
Mikulas Patocka <mpatocka@redhat.com> Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Signed-off-by:
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Jintack Lim authored
commit 370a0ec1 upstream. Currently, if a vcpu thread tries to change the active state of an interrupt which is already on the same vcpu's AP list, it will loop forever. Since the VGIC mmio handler is called after a vcpu has already synced back the LR state to the struct vgic_irq, we can just let it proceed safely. Reviewed-by:
Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
Jintack Lim <jintack@cs.columbia.edu> Signed-off-by:
Christoffer Dall <cdall@linaro.org> Signed-off-by:
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Janosch Frank authored
commit 2e4d8800 upstream. While we can technically not run huge page guests right now, we can setup a guest with huge pages. Trying to migrate it will trigger a VM_BUG_ON and, if the kernel is not configured to panic on a BUG, it will happily try to work on non-existing page table entries. With this patch, we always return "dirty" if we encounter a large page when migrating. This at least fixes the immediate problem until we have proper handling for both kind of pages. Fixes: 15f36ebd ("KVM: s390: Add proper dirty bitmap support to S390 kvm.") Signed-off-by:
Janosch Frank <frankja@linux.vnet.ibm.com> Acked-by:
Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
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Krzysztof Kozlowski authored
commit f98c7bce upstream. If DMA is not available (even when configured in DeviceTree), the driver will fail the startup procedure thus making serial console not available. For example this causes boot failure on QEMU ARMv7 (Exynos4210, SMDKC210): [ 1.302575] OF: amba_device_add() failed (-19) for /amba/pdma@12680000 ... [ 11.435732] samsung-uart 13800000.serial: DMA request failed [ 72.963893] samsung-uart 13800000.serial: DMA request failed [ 73.143361] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000000 DMA is not necessary for serial to work, so continue with UART startup after emitting a warning. Fixes: 62c37eed ("serial: samsung: add dma reqest/release functions") Signed-off-by:
Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by:
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Johan Hovold authored
commit 654b404f upstream. Add missing sanity check to the bulk-in completion handler to avoid an integer underflow that can be triggered by a malicious device. This avoids leaking 128 kB of memory content from after the URB transfer buffer to user space. Fixes: 8c209e67 ("USB: make actual_length in struct urb field u32") Fixes: 1da177e4 ("Linux-2.6.12-rc2") Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Johan Hovold authored
commit 0b1d250a upstream. Fix a NULL-pointer dereference in the interrupt callback should a malicious device send data containing a bad port number by adding the missing sanity check. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Signed-off-by:
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Johan Hovold authored
commit de46e566 upstream. Make sure to verify that we have the required interrupt-out endpoint for IOWarrior56 devices to avoid dereferencing a NULL-pointer in write should a malicious device lack such an endpoint. Fixes: 946b960d ("USB: add driver for iowarrior devices.") Signed-off-by:
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Johan Hovold authored
commit b7321e81 upstream. Make sure to check for the required interrupt-in endpoint to avoid dereferencing a NULL-pointer should a malicious device lack such an endpoint. Note that a fairly recent change purported to fix this issue, but added an insufficient test on the number of endpoints only, a test which can now be removed. Fixes: 4ec0ef3a ("USB: iowarrior: fix oops with malicious USB descriptors") Fixes: 946b960d ("USB: add driver for iowarrior devices.") Signed-off-by:
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Johan Hovold authored
commit 30572418 upstream. This driver needlessly took another reference to the tty on open, a reference which was then never released on close. This lead to not just a leak of the tty, but also a driver reference leak that prevented the driver from being unloaded after a port had once been opened. Fixes: 4a90f09b ("tty: usb-serial krefs") Signed-off-by:
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Johan Hovold authored
commit 8c76d7cd upstream. Add missing sanity check to the bulk-in completion handler to avoid an integer underflow that could be triggered by a malicious device. This avoids leaking up to 56 bytes from after the URB transfer buffer to user space. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Signed-off-by:
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Guenter Roeck authored
commit dcc7620c upstream. Upstream commit 98d74f9c ("xhci: fix 10 second timeout on removal of PCI hotpluggable xhci controllers") fixes a problem with hot pluggable PCI xhci controllers which can result in excessive timeouts, to the point where the system reports a deadlock. The same problem is seen with hot pluggable xhci controllers using the xhci-plat driver, such as the driver used for Type-C ports on rk3399. Similar to hot-pluggable PCI controllers, the driver for this chip removes the xhci controller from the system when the Type-C cable is disconnected. The solution for PCI devices works just as well for non-PCI devices and avoids the problem. Signed-off-by:
Guenter Roeck <linux@roeck-us.net> Signed-off-by:
Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by:
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Peter Chen authored
commit f95e60a7 upstream. According to xHCI spec, HCIVERSION containing a BCD encoding of the xHCI specification revision number, 0100h corresponds to xHCI version 1.0. Change "100" as "0x100". Cc: Lu Baolu <baolu.lu@linux.intel.com> Fixes: 04abb6de ("xhci: Read and parse new xhci 1.1 capability register") Signed-off-by:
Peter Chen <peter.chen@nxp.com> Signed-off-by:
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Roger Quadros authored
commit eb38d913 upstream. This reverts commit 4fbac520. This commit breaks g_webcam when used with uvc-gadget [1]. The user space application (e.g. uvc-gadget) is responsible for sending response to UVC class specific requests on control endpoint in uvc_send_response() in uvc_v4l2.c. The bad commit was causing a duplicate response to be sent with incorrect response data thus causing UVC probe to fail at the host and broken control transfer endpoint at the gadget. [1] - git://git.ideasonboard.org/uvc-gadget.gitAcked-by:
Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by:
Roger Quadros <rogerq@ti.com> Signed-off-by:
Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by:
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