- 03 Jul, 2019 3 commits
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Hayes Wang authored
r8153b_rx_agg_chg_indicate() needs to be called after enabling TX/RX and before calling rxdy_gated_en(tp, false). Otherwise, the change of the settings of RX aggregation wouldn't work. Besides, adjust rtl8152_set_coalesce() for the same reason. If rx_coalesce_usecs is changed, restart TX/RX to let the setting work. Signed-off-by:
Hayes Wang <hayeswang@realtek.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Stephen Hemminger authored
If IPV6 was disabled, then ss command would cause a kernel warning because the command was attempting to dump IPV6 socket information. The fix is to just remove the warning. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=202249 Fixes: 432490f9 ("net: ip, diag -- Add diag interface for raw sockets") Signed-off-by:
Stephen Hemminger <stephen@networkplumber.org> Signed-off-by:
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Po-Hsu Lin authored
The psock_tpacket test will need to access /proc/kallsyms, this would require the kernel config CONFIG_KALLSYMS to be enabled first. Apart from adding CONFIG_KALLSYMS to the net/config file here, check the file existence to determine if we can run this test will be helpful to avoid a false-positive test result when testing it directly with the following commad against a kernel that have CONFIG_KALLSYMS disabled: make -C tools/testing/selftests TARGETS=net run_tests Signed-off-by:Po-Hsu Lin <po-hsu.lin@canonical.com> Acked-by:
Shuah Khan <skhan@linuxfoundation.org> Signed-off-by:
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- 02 Jul, 2019 25 commits
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David Howells authored
If the rxrpc_eproto tracepoint is enabled, an oops will be cause by the trace line that rxrpc_extract_header() tries to emit when a protocol error occurs (typically because the packet is short) because the call argument is NULL. Fix this by using ?: to assume 0 as the debug_id if call is NULL. This can then be induced by: echo -e '\0\0\0\0\0\0\0\0' | ncat -4u --send-only <addr> 20001 where addr has the following program running on it: #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/socket.h> #include <arpa/inet.h> #include <linux/rxrpc.h> int main(void) { struct sockaddr_rxrpc srx; int fd; memset(&srx, 0, sizeof(srx)); srx.srx_family = AF_RXRPC; srx.srx_service = 0; srx.transport_type = AF_INET; srx.transport_len = sizeof(srx.transport.sin); srx.transport.sin.sin_family = AF_INET; srx.transport.sin.sin_port = htons(0x4e21); fd = socket(AF_RXRPC, SOCK_DGRAM, AF_INET6); bind(fd, (struct sockaddr *)&srx, sizeof(srx)); sleep(20); return 0; } It results in the following oops. BUG: kernel NULL pointer dereference, address: 0000000000000340 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page ... RIP: 0010:trace_event_raw_event_rxrpc_rx_eproto+0x47/0xac ... Call Trace: <IRQ> rxrpc_extract_header+0x86/0x171 ? rcu_read_lock_sched_held+0x5d/0x63 ? rxrpc_new_skb+0xd4/0x109 rxrpc_input_packet+0xef/0x14fc ? rxrpc_input_data+0x986/0x986 udp_queue_rcv_one_skb+0xbf/0x3d0 udp_unicast_rcv_skb.isra.8+0x64/0x71 ip_protocol_deliver_rcu+0xe4/0x1b4 ip_local_deliver+0xf0/0x154 __netif_receive_skb_one_core+0x50/0x6c netif_receive_skb_internal+0x26b/0x2e9 napi_gro_receive+0xf8/0x1da rtl8169_poll+0x303/0x4c4 net_rx_action+0x10e/0x333 __do_softirq+0x1a5/0x38f irq_exit+0x54/0xc4 do_IRQ+0xda/0xf8 common_interrupt+0xf/0xf </IRQ> ... ? cpuidle_enter_state+0x23c/0x34d cpuidle_enter+0x2a/0x36 do_idle+0x163/0x1ea cpu_startup_entry+0x1d/0x1f start_secondary+0x157/0x172 secondary_startup_64+0xa4/0xb0 Fixes: a25e21f0 ("rxrpc, afs: Use debug_ids rather than pointers in traces") Signed-off-by:David Howells <dhowells@redhat.com> Reviewed-by:
Marc Dionne <marc.dionne@auristor.com> Signed-off-by:
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Phong Tran authored
This is for fixing bug KMSAN: uninit-value in ax88772_bind Tested by https://groups.google.com/d/msg/syzkaller-bugs/aFQurGotng4/eB_HlNhhCwAJ Reported-by: syzbot+8a3fc6674bbc3978ed4e@syzkaller.appspotmail.com syzbot found the following crash on: HEAD commit: f75e4cfe kmsan: use kmsan_handle_urb() in urb.c git tree: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=136d720ea00000 kernel config: https://syzkaller.appspot.com/x/.config?x=602468164ccdc30a dashboard link: https://syzkaller.appspot.com/bug?extid=8a3fc6674bbc3978ed4e compiler: clang version 9.0.0 (/home/glider/llvm/clang 06d00afa61eef8f7f501ebdb4e8612ea43ec2d78) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12788316a00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=120359aaa00000 ================================================================== BUG: KMSAN: uninit-value in is_valid_ether_addr include/linux/etherdevice.h:200 [inline] BUG: KMSAN: uninit-value in asix_set_netdev_dev_addr drivers/net/usb/asix_devices.c:73 [inline] BUG: KMSAN: uninit-value in ax88772_bind+0x93d/0x11e0 drivers/net/usb/asix_devices.c:724 CPU: 0 PID: 3348 Comm: kworker/0:2 Not tainted 5.1.0+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x130/0x2a0 mm/kmsan/kmsan.c:622 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:310 is_valid_ether_addr include/linux/etherdevice.h:200 [inline] asix_set_netdev_dev_addr drivers/net/usb/asix_devices.c:73 [inline] ax88772_bind+0x93d/0x11e0 drivers/net/usb/asix_devices.c:724 usbnet_probe+0x10f5/0x3940 drivers/net/usb/usbnet.c:1728 usb_probe_interface+0xd66/0x1320 drivers/usb/core/driver.c:361 really_probe+0xdae/0x1d80 drivers/base/dd.c:513 driver_probe_device+0x1b3/0x4f0 drivers/base/dd.c:671 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:778 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x454/0x730 drivers/base/dd.c:844 device_initial_probe+0x4a/0x60 drivers/base/dd.c:891 bus_probe_device+0x137/0x390 drivers/base/bus.c:514 device_add+0x288d/0x30e0 drivers/base/core.c:2106 usb_set_configuration+0x30dc/0x3750 drivers/usb/core/message.c:2027 generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210 usb_probe_device+0x14c/0x200 drivers/usb/core/driver.c:266 really_probe+0xdae/0x1d80 drivers/base/dd.c:513 driver_probe_device+0x1b3/0x4f0 drivers/base/dd.c:671 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:778 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x454/0x730 drivers/base/dd.c:844 device_initial_probe+0x4a/0x60 drivers/base/dd.c:891 bus_probe_device+0x137/0x390 drivers/base/bus.c:514 device_add+0x288d/0x30e0 drivers/base/core.c:2106 usb_new_device+0x23e5/0x2ff0 drivers/usb/core/hub.c:2534 hub_port_connect drivers/usb/core/hub.c:5089 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x48d1/0x7290 drivers/usb/core/hub.c:5432 process_one_work+0x1572/0x1f00 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x189c/0x2460 kernel/workqueue.c:2417 kthread+0x4b5/0x4f0 kernel/kthread.c:254 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 Signed-off-by:
Phong Tran <tranmanphong@gmail.com> Signed-off-by:
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David S. Miller authored
Andreas Steinmetz says: ==================== macsec: fix some bugs in the receive path This series fixes some bugs in the receive path of macsec. The first is a use after free when processing macsec frames with a SecTAG that has the TCI E bit set but the C bit clear. In the 2nd bug, the driver leaves an invalid checksumming state after decrypting the packet. This is a combined effort of Sabrina Dubroca <sd@queasysnail.net> and me. ==================== Signed-off-by: -
Andreas Steinmetz authored
Fix checksumming after decryption. Signed-off-by:
Andreas Steinmetz <ast@domdv.de> Signed-off-by:
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Andreas Steinmetz authored
Fix use-after-free of skb when rx_handler returns RX_HANDLER_PASS. Signed-off-by:
Willem de Bruijn <willemb@google.com> Signed-off-by:
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David Howells authored
If sendmsg() or sendmmsg() is called on a connected socket that hasn't had bind() called on it, then an oops will occur when the kernel tries to connect the call because no local endpoint has been allocated. Fix this by implicitly binding the socket if it is in the RXRPC_CLIENT_UNBOUND state, just like it does for the RXRPC_UNBOUND state. Further, the state should be transitioned to RXRPC_CLIENT_BOUND after this to prevent further attempts to bind it. This can be tested with: #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/socket.h> #include <arpa/inet.h> #include <linux/rxrpc.h> static const unsigned char inet6_addr[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -1, 0xac, 0x14, 0x14, 0xaa }; int main(void) { struct sockaddr_rxrpc srx; struct cmsghdr *cm; struct msghdr msg; unsigned char control[16]; int fd; memset(&srx, 0, sizeof(srx)); srx.srx_family = 0x21; srx.srx_service = 0; srx.transport_type = AF_INET; srx.transport_len = 0x1c; srx.transport.sin6.sin6_family = AF_INET6; srx.transport.sin6.sin6_port = htons(0x4e22); srx.transport.sin6.sin6_flowinfo = htons(0x4e22); srx.transport.sin6.sin6_scope_id = htons(0xaa3b); memcpy(&srx.transport.sin6.sin6_addr, inet6_addr, 16); cm = (struct cmsghdr *)control; cm->cmsg_len = CMSG_LEN(sizeof(unsigned long)); cm->cmsg_level = SOL_RXRPC; cm->cmsg_type = RXRPC_USER_CALL_ID; *(unsigned long *)CMSG_DATA(cm) = 0; msg.msg_name = NULL; msg.msg_namelen = 0; msg.msg_iov = NULL; msg.msg_iovlen = 0; msg.msg_control = control; msg.msg_controllen = cm->cmsg_len; msg.msg_flags = 0; fd = socket(AF_RXRPC, SOCK_DGRAM, AF_INET); connect(fd, (struct sockaddr *)&srx, sizeof(srx)); sendmsg(fd, &msg, 0); return 0; } Leading to the following oops: BUG: kernel NULL pointer dereference, address: 0000000000000018 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page ... RIP: 0010:rxrpc_connect_call+0x42/0xa01 ... Call Trace: ? mark_held_locks+0x47/0x59 ? __local_bh_enable_ip+0xb6/0xba rxrpc_new_client_call+0x3b1/0x762 ? rxrpc_do_sendmsg+0x3c0/0x92e rxrpc_do_sendmsg+0x3c0/0x92e rxrpc_sendmsg+0x16b/0x1b5 sock_sendmsg+0x2d/0x39 ___sys_sendmsg+0x1a4/0x22a ? release_sock+0x19/0x9e ? reacquire_held_locks+0x136/0x160 ? release_sock+0x19/0x9e ? find_held_lock+0x2b/0x6e ? __lock_acquire+0x268/0xf73 ? rxrpc_connect+0xdd/0xe4 ? __local_bh_enable_ip+0xb6/0xba __sys_sendmsg+0x5e/0x94 do_syscall_64+0x7d/0x1bf entry_SYSCALL_64_after_hwframe+0x49/0xbe Fixes: 2341e077 ("rxrpc: Simplify connect() implementation and simplify sendmsg() op") Reported-by: syzbot+7966f2a0b2c7da8939b4@syzkaller.appspotmail.com Signed-off-by: -
David S. Miller authored
Nikolay Aleksandrov says: ==================== net: bridge: fix possible stale skb pointers In the bridge driver we have a couple of places which call pskb_may_pull but we've cached skb pointers before that and use them after which can lead to out-of-bounds/stale pointer use. I've had these in my "to fix" list for some time and now we got a report (patch 01) so here they are. Patches 02-04 are fixes based on code inspection. Also patch 01 was tested by Martin Weinelt, Martin if you don't mind please add your tested-by tag to it by replying with Tested-by: name <email>. I've also briefly tested the set by trying to exercise those code paths. ==================== Signed-off-by: -
Nikolay Aleksandrov authored
Don't cache eth dest pointer before calling pskb_may_pull. Fixes: cf0f02d0 ("[BRIDGE]: use llc for receiving STP packets") Signed-off-by:
Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by:
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Nikolay Aleksandrov authored
We would cache ether dst pointer on input in br_handle_frame_finish but after the neigh suppress code that could lead to a stale pointer since both ipv4 and ipv6 suppress code do pskb_may_pull. This means we have to always reload it after the suppress code so there's no point in having it cached just retrieve it directly. Fixes: 057658cb ("bridge: suppress arp pkts on BR_NEIGH_SUPPRESS ports") Fixes: ed842fae ("bridge: suppress nd pkts on BR_NEIGH_SUPPRESS ports") Signed-off-by:
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Nikolay Aleksandrov authored
We get a pointer to the ipv6 hdr in br_ip6_multicast_query but we may call pskb_may_pull afterwards and end up using a stale pointer. So use the header directly, it's just 1 place where it's needed. Fixes: 08b202b6 ("bridge br_multicast: IPv6 MLD support.") Signed-off-by:
Martin Weinelt <martin@linuxlounge.net> Signed-off-by:
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Nikolay Aleksandrov authored
We take a pointer to grec prior to calling pskb_may_pull and use it afterwards to get nsrcs so record nsrcs before the pull when handling igmp3 and we get a pointer to nsrcs and call pskb_may_pull when handling mld2 which again could lead to reading 2 bytes out-of-bounds. ================================================================== BUG: KASAN: use-after-free in br_multicast_rcv+0x480c/0x4ad0 [bridge] Read of size 2 at addr ffff8880421302b4 by task ksoftirqd/1/16 CPU: 1 PID: 16 Comm: ksoftirqd/1 Tainted: G OE 5.2.0-rc6+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 Call Trace: dump_stack+0x71/0xab print_address_description+0x6a/0x280 ? br_multicast_rcv+0x480c/0x4ad0 [bridge] __kasan_report+0x152/0x1aa ? br_multicast_rcv+0x480c/0x4ad0 [bridge] ? br_multicast_rcv+0x480c/0x4ad0 [bridge] kasan_report+0xe/0x20 br_multicast_rcv+0x480c/0x4ad0 [bridge] ? br_multicast_disable_port+0x150/0x150 [bridge] ? ktime_get_with_offset+0xb4/0x150 ? __kasan_kmalloc.constprop.6+0xa6/0xf0 ? __netif_receive_skb+0x1b0/0x1b0 ? br_fdb_update+0x10e/0x6e0 [bridge] ? br_handle_frame_finish+0x3c6/0x11d0 [bridge] br_handle_frame_finish+0x3c6/0x11d0 [bridge] ? br_pass_frame_up+0x3a0/0x3a0 [bridge] ? virtnet_probe+0x1c80/0x1c80 [virtio_net] br_handle_frame+0x731/0xd90 [bridge] ? select_idle_sibling+0x25/0x7d0 ? br_handle_frame_finish+0x11d0/0x11d0 [bridge] __netif_receive_skb_core+0xced/0x2d70 ? virtqueue_get_buf_ctx+0x230/0x1130 [virtio_ring] ? do_xdp_generic+0x20/0x20 ? virtqueue_napi_complete+0x39/0x70 [virtio_net] ? virtnet_poll+0x94d/0xc78 [virtio_net] ? receive_buf+0x5120/0x5120 [virtio_net] ? __netif_receive_skb_one_core+0x97/0x1d0 __netif_receive_skb_one_core+0x97/0x1d0 ? __netif_receive_skb_core+0x2d70/0x2d70 ? _raw_write_trylock+0x100/0x100 ? __queue_work+0x41e/0xbe0 process_backlog+0x19c/0x650 ? _raw_read_lock_irq+0x40/0x40 net_rx_action+0x71e/0xbc0 ? __switch_to_asm+0x40/0x70 ? napi_complete_done+0x360/0x360 ? __switch_to_asm+0x34/0x70 ? __switch_to_asm+0x40/0x70 ? __schedule+0x85e/0x14d0 __do_softirq+0x1db/0x5f9 ? takeover_tasklets+0x5f0/0x5f0 run_ksoftirqd+0x26/0x40 smpboot_thread_fn+0x443/0x680 ? sort_range+0x20/0x20 ? schedule+0x94/0x210 ? __kthread_parkme+0x78/0xf0 ? sort_range+0x20/0x20 kthread+0x2ae/0x3a0 ? kthread_create_worker_on_cpu+0xc0/0xc0 ret_from_fork+0x35/0x40 The buggy address belongs to the page: page:ffffea0001084c00 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x0 flags: 0xffffc000000000() raw: 00ffffc000000000 ffffea0000cfca08 ffffea0001098608 0000000000000000 raw: 0000000000000000 0000000000000003 00000000ffffff7f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888042130180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888042130200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > ffff888042130280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888042130300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888042130380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== Disabling lock debugging due to kernel taint Fixes: bc8c20ac ("bridge: multicast: treat igmpv3 report with INCLUDE and no sources as a leave") Reported-by: -
Hayes Wang authored
1. Rename r8153b_queue_wake() to r8153_queue_wake(). 2. Correct the setting. The enable bit should be 0xd38c bit 0. Besides, the 0xd38a bit 0 and 0xd398 bit 8 have to be cleared for both enabled and disabled. Signed-off-by:
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Jakub Kicinski authored
Commit 86029d10 ("tls: zero the crypto information from tls_context before freeing") added memzero_explicit() calls to clear the key material before freeing struct tls_context, but it missed tls_device.c has its own way of freeing this structure. Replace the missing free. Fixes: 86029d10 ("tls: zero the crypto information from tls_context before freeing") Signed-off-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by:
Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by:
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Jakub Kicinski authored
Neither drivers nor the tls offload code currently supports TLS version 1.3. Check the TLS version when installing connection state. TLS 1.3 will just fallback to the kernel crypto for now. Fixes: 130b392c ("net: tls: Add tls 1.3 support") Signed-off-by:
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David S. Miller authored
Cong Wang says: ==================== idr: fix overflow cases on 32-bit CPU idr_get_next_ul() is problematic by design, it can't handle the following overflow case well on 32-bit CPU: u32 id = UINT_MAX; idr_alloc_u32(&id); while (idr_get_next_ul(&id) != NULL) id++; when 'id' overflows and becomes 0 after UINT_MAX, the loop goes infinite. Fix this by eliminating external users of idr_get_next_ul() and migrating them to idr_for_each_entry_continue_ul(). And add an additional parameter for these iteration macros to detect overflow properly. Please merge this through networking tree, as all the users are in networking subsystem. ==================== Signed-off-by: -
Davide Caratti authored
Reported-by:
Li Shuang <shuali@redhat.com> Signed-off-by:
Davide Caratti <dcaratti@redhat.com> Signed-off-by:
Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by:
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Cong Wang authored
Similarly, other callers of idr_get_next_ul() suffer the same overflow bug as they don't handle it properly either. Introduce idr_for_each_entry_continue_ul() to help these callers iterate from a given ID. cls_flower needs more care here because it still has overflow when does arg->cookie++, we have to fold its nested loops into one and remove the arg->cookie++. Fixes: 01683a14 ("net: sched: refactor flower walk to iterate over idr") Fixes: 12d6066c ("net/mlx5: Add flow counters idr") Reported-by:
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Cong Wang authored
idr_for_each_entry_ul() is buggy as it can't handle overflow case correctly. When we have an ID == UINT_MAX, it becomes an infinite loop. This happens when running on 32-bit CPU where unsigned long has the same size with unsigned int. There is no better way to fix this than casting it to a larger integer, but we can't just 64 bit integer on 32 bit CPU. Instead we could just use an additional integer to help us to detect this overflow case, that is, adding a new parameter to this macro. Fortunately tc action is its only user right now. Fixes: 65a206c0 ("net/sched: Change act_api and act_xxx modules to use IDR") Reported-by:
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David S. Miller authored
Stefano Garzarella says: ==================== vsock/virtio: several fixes in the .probe() and .remove() During the review of "[PATCH] vsock/virtio: Initialize core virtio vsock before registering the driver", Stefan pointed out some possible issues in the .probe() and .remove() callbacks of the virtio-vsock driver. This series tries to solve these issues: - Patch 1 adds RCU critical sections to avoid use-after-free of 'the_virtio_vsock' pointer. - Patch 2 stops workers before to call vdev->config->reset(vdev) to be sure that no one is accessing the device. - Patch 3 moves the works flush at the end of the .remove() to avoid use-after-free of 'vsock' object. v2: - Patch 1: use RCU to protect 'the_virtio_vsock' pointer - Patch 2: no changes - Patch 3: flush works only at the end of .remove() - Removed patch 4 because virtqueue_detach_unused_buf() returns all the buffers allocated. v1: https://patchwork.kernel.org/cover/10964733/ ==================== Signed-off-by:
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Stefano Garzarella authored
This patch moves the flush of works after vdev->config->del_vqs(vdev), because we need to be sure that no workers run before to free the 'vsock' object. Since we stopped the workers using the [tx|rx|event]_run flags, we are sure no one is accessing the device while we are calling vdev->config->reset(vdev), so we can safely move the workers' flush. Before the vdev->config->del_vqs(vdev), workers can be scheduled by VQ callbacks, so we must flush them after del_vqs(), to avoid use-after-free of 'vsock' object. Suggested-by:
Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
Stefano Garzarella <sgarzare@redhat.com> Signed-off-by:
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Stefano Garzarella authored
Before to call vdev->config->reset(vdev) we need to be sure that no one is accessing the device, for this reason, we add new variables in the struct virtio_vsock to stop the workers during the .remove(). This patch also add few comments before vdev->config->reset(vdev) and vdev->config->del_vqs(vdev). Suggested-by:
Stefan Hajnoczi <stefanha@redhat.com> Suggested-by:
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Stefano Garzarella authored
Some callbacks used by the upper layers can run while we are in the .remove(). A potential use-after-free can happen, because we free the_virtio_vsock without knowing if the callbacks are over or not. To solve this issue we move the assignment of the_virtio_vsock at the end of .probe(), when we finished all the initialization, and at the beginning of .remove(), before to release resources. For the same reason, we do the same also for the vdev->priv. We use RCU to be sure that all callbacks that use the_virtio_vsock ended before freeing it. This is not required for callbacks that use vdev->priv, because after the vdev->config->del_vqs() we are sure that they are ended and will no longer be invoked. We also take the mutex during the .remove() to avoid that .probe() can run while we are resetting the device. Signed-off-by:
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Taehee Yoo authored
__vxlan_dev_create() destroys FDB using specific pointer which indicates a fdb when error occurs. But that pointer should not be used when register_netdevice() fails because register_netdevice() internally destroys fdb when error occurs. This patch makes vxlan_fdb_create() to do not link fdb entry to vxlan dev internally. Instead, a new function vxlan_fdb_insert() is added to link fdb to vxlan dev. vxlan_fdb_insert() is called after calling register_netdevice(). This routine can avoid situation that ->ndo_uninit() destroys fdb entry in error path of register_netdevice(). Hence, error path of __vxlan_dev_create() routine can have an opportunity to destroy default fdb entry by hand. Test command ip link add bonding_masters type vxlan id 0 group 239.1.1.1 \ dev enp0s9 dstport 4789 Splat looks like: [ 213.392816] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 213.401257] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN PTI [ 213.402178] CPU: 0 PID: 1414 Comm: ip Not tainted 5.2.0-rc5+ #256 [ 213.402178] RIP: 0010:vxlan_fdb_destroy+0x120/0x220 [vxlan] [ 213.402178] Code: df 48 8b 2b 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 06 01 00 00 4c 8b 63 08 48 b8 00 00 00 00 00 fc d [ 213.402178] RSP: 0018:ffff88810cb9f0a0 EFLAGS: 00010202 [ 213.402178] RAX: dffffc0000000000 RBX: ffff888101d4a8c8 RCX: 0000000000000000 [ 213.402178] RDX: 1bd5a00000000040 RSI: ffff888101d4a8c8 RDI: ffff888101d4a8d0 [ 213.402178] RBP: 0000000000000000 R08: fffffbfff22b72d9 R09: 0000000000000000 [ 213.402178] R10: 00000000ffffffef R11: 0000000000000000 R12: dead000000000200 [ 213.402178] R13: ffff88810cb9f1f8 R14: ffff88810efccda0 R15: ffff88810efccda0 [ 213.402178] FS: 00007f7f6621a0c0(0000) GS:ffff88811b000000(0000) knlGS:0000000000000000 [ 213.402178] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 213.402178] CR2: 000055746f0807d0 CR3: 00000001123e0000 CR4: 00000000001006f0 [ 213.402178] Call Trace: [ 213.402178] __vxlan_dev_create+0x3a9/0x7d0 [vxlan] [ 213.402178] ? vxlan_changelink+0x740/0x740 [vxlan] [ 213.402178] ? rcu_read_unlock+0x60/0x60 [vxlan] [ 213.402178] ? __kasan_kmalloc.constprop.3+0xa0/0xd0 [ 213.402178] vxlan_newlink+0x8d/0xc0 [vxlan] [ 213.402178] ? __vxlan_dev_create+0x7d0/0x7d0 [vxlan] [ 213.554119] ? __netlink_ns_capable+0xc3/0xf0 [ 213.554119] __rtnl_newlink+0xb75/0x1180 [ 213.554119] ? rtnl_link_unregister+0x230/0x230 [ ... ] Fixes: 0241b836 ("vxlan: fix default fdb entry netlink notify ordering during netdev create") Suggested-by:Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by:
Taehee Yoo <ap420073@gmail.com> Acked-by:
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Marcelo Ricardo Leitner authored
It allocates the extended area for outbound streams only on sendmsg calls, if they are not yet allocated. When using the priority stream scheduler, this initialization may imply into a subsequent allocation, which may fail. In this case, it was aborting the stream scheduler initialization but leaving the ->ext pointer (allocated) in there, thus in a partially initialized state. On a subsequent call to sendmsg, it would notice the ->ext pointer in there, and trip on uninitialized stuff when trying to schedule the data chunk. The fix is undo the ->ext initialization if the stream scheduler initialization fails and avoid the partially initialized state. Although syzkaller bisected this to commit 4ff40b86 ("sctp: set chunk transport correctly when it's a new asoc"), this bug was actually introduced on the commit I marked below. Reported-by: syzbot+c1a380d42b190ad1e559@syzkaller.appspotmail.com Fixes: 5bbbbe32 ("sctp: introduce stream scheduler foundations") Tested-by:
Xin Long <lucien.xin@gmail.com> Signed-off-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Acked-by:
Neil Horman <nhorman@redhat.com> Signed-off-by:
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Cong Wang authored
When the skb is associated with a new sock, just assigning it to skb->sk is not sufficient, we have to set its destructor to free the sock properly too. Reported-by: syzbot+d6636a36d3c34bd88938@syzkaller.appspotmail.com Signed-off-by:
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- 01 Jul, 2019 5 commits
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Matteo Croce authored
Avoid the situation where an IPV6 only flag is applied to an IPv4 address: # ip addr add 192.0.2.1/24 dev dummy0 nodad home mngtmpaddr noprefixroute # ip -4 addr show dev dummy0 2: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000 inet 192.0.2.1/24 scope global noprefixroute dummy0 valid_lft forever preferred_lft forever Or worse, by sending a malicious netlink command: # ip -4 addr show dev dummy0 2: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000 inet 192.0.2.1/24 scope global nodad optimistic dadfailed home tentative mngtmpaddr noprefixroute stable-privacy dummy0 valid_lft forever preferred_lft forever Signed-off-by:Matteo Croce <mcroce@redhat.com> Reviewed-by:
David Ahern <dsahern@gmail.com> Signed-off-by:
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Vandana BN authored
Fix GUE_PFLAG_REMCSUM to use "U" cast to avoid shifting signed 32-bit value by 31 bits problem. Signed-off-by:
Vandana BN <bnvandana@gmail.com> Signed-off-by:
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Vandana BN authored
Fix DST_FEATURE_ECN_CA to use "U" cast to avoid shifting signed 32-bit value by 31 bits problem. Signed-off-by:
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Hangbin Liu authored
default_ttl should be integer instead of bool Reported-by:
Ying Xu <yinxu@redhat.com> Fixes: a59166e4 ("mpls: allow TTL propagation from IP packets to be configured") Signed-off-by:
Hangbin Liu <liuhangbin@gmail.com> Reviewed-by:
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John Hurley authored
Skbs may have their checksum value populated by HW. If this is a checksum calculated over the entire packet then the CHECKSUM_COMPLETE field is marked. Changes to the data pointer on the skb throughout the network stack still try to maintain this complete csum value if it is required through functions such as skb_postpush_rcsum. The MPLS actions in Open vSwitch modify a CHECKSUM_COMPLETE value when changes are made to packet data without a push or a pull. This occurs when the ethertype of the MAC header is changed or when MPLS lse fields are modified. The modification is carried out using the csum_partial function to get the csum of a buffer and add it into the larger checksum. The buffer is an inversion of the data to be removed followed by the new data. Because the csum is calculated over 16 bits and these values align with 16 bits, the effect is the removal of the old value from the CHECKSUM_COMPLETE and addition of the new value. However, the csum fed into the function and the outcome of the calculation are also inverted. This would only make sense if it was the new value rather than the old that was inverted in the input buffer. Fix the issue by removing the bit inverts in the csum_partial calculation. The bug was verified and the fix tested by comparing the folded value of the updated CHECKSUM_COMPLETE value with the folded value of a full software checksum calculation (reset skb->csum to 0 and run skb_checksum_complete(skb)). Prior to the fix the outcomes differed but after they produce the same result. Fixes: 25cd9ba0 ("openvswitch: Add basic MPLS support to kernel") Fixes: bc7cc599 ("openvswitch: update checksum in {push,pop}_mpls") Signed-off-by:
John Hurley <john.hurley@netronome.com> Reviewed-by:
Simon Horman <simon.horman@netronome.com> Acked-by:
Pravin B Shelar <pshelar@ovn.org> Signed-off-by:
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- 30 Jun, 2019 6 commits
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David S. Miller authored
Michael Chan says: ==================== bnxt_en: Bug fixes. Miscellaneous bug fix patches, including two resource handling fixes for the RDMA driver, a PCI shutdown patch to add pci_disable_device(), a patch to fix ethtool selftest crash, and the last one suppresses an unnecessry error message. Please also queue patches 1, 2, and 3 for -stable. Thanks. ==================== Signed-off-by: -
Michael Chan authored
Some firmware versions do not support this so use the silent variant to send the message to firmware to suppress the harmless error. This error message is unnecessarily alarming the user. Fixes: afdc8a84 ("bnxt_en: Add DCBNL DSCP application protocol support.") Signed-off-by:
Michael Chan <michael.chan@broadcom.com> Signed-off-by:
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Michael Chan authored
In an earlier commit to improve NQ reservations on 57500 chips, we set the resv_irqs on the 57500 VFs to the fixed value assigned by the PF regardless of how many are actually used. The current code assumes that resv_irqs minus the ones used by the network driver must be the ones for the RDMA driver. This is no longer true and we may return more MSIX vectors than requested, causing inconsistency. Fix it by capping the value. Fixes: 01989c6b ("bnxt_en: Improve NQ reservations.") Signed-off-by:
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Michael Chan authored
The current logic assumes that the RDMA driver uses one statistics context adjacent to the ones used by the network driver. This assumption is not true and the statistics context used by the RDMA driver is tied to its MSIX base vector. This wrong assumption can cause RDMA driver failure after changing ethtool rings on the network side. Fix the statistics reservation logic accordingly. Fixes: 780baad4 ("bnxt_en: Reserve 1 stat_ctx for RDMA driver.") Signed-off-by:
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Michael Chan authored
After ethtool loopback packet tests, we re-open the nic for the next IRQ test. If the open fails, we must not proceed with the IRQ test or we will crash with NULL pointer dereference. Fix it by checking the bnxt_open_nic() return code before proceeding. Reported-by:
Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com> Fixes: 67fea463 ("bnxt_en: Add interrupt test to ethtool -t selftest.") Signed-off-by:
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Michael Chan authored
Some chips with older firmware can continue to perform DMA read from context memory even after the memory has been freed. In the PCI shutdown method, we need to call pci_disable_device() to shutdown DMA to prevent this DMA before we put the device into D3hot. DMA memory request in D3hot state will generate PCI fatal error. Similarly, in the driver remove method, the context memory should only be freed after DMA has been shutdown for correctness. Fixes: 98f04cf0 ("bnxt_en: Check context memory requirements from firmware.") Signed-off-by:
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- 29 Jun, 2019 1 commit
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Baruch Siach authored
Add a 1ms delay after reset deactivation. Otherwise the chip returns bogus ID value. This is observed with 88E6390 (Peridot) chip. Signed-off-by:
Baruch Siach <baruch@tkos.co.il> Reviewed-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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