Hello, I am getting this trace from my driver which I ported from 2.6.32-431 to 3.10.0-123 kernel. The driver works just fine on 2.6.32-431 kernel but not on 3.10.0-123 after porting. Ping works fine on 3.10.0-123 but I get this trace when I run ssh or tcp traffic. Please find the attached wireshark traces of both machines in between ssh was tried. Please help. Patch: --- a/src/kernel/xyvnic/xyvnic.c +++ b/src/kernel/xyvnic/xyvnic.c @@ -230,7 +230,11 @@ xyvnic_worker_thread(void *arg) * Once unconditional, we will always notify when the * link returns (and when we restart the driver). */ +#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 5, 0)) netif_notify_peers(sp->dev); +#else + netdev_notify_peers(sp->dev); +#endif /* * You may get a series of: * NOHZ: local_softirq_pending @@ -429,7 +433,11 @@ xyvnic_probe(void) dev->netdev_ops = &xyvnic_netdev_ops; dev->mtu = STUB_MTU; dev->hard_header_len = ETH_HLEN + 2; +#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0)) dev->features = NETIF_F_NO_CSUM; +#else + dev->features = NETIF_F_HW_CSUM; +#endif netif_napi_add(dev, &sp->napi, xyvnic_poll, 256); SET_ETHTOOL_OPS(dev, &xyvnic_ethtool_ops); Trace: [ 8904.486918] ------------[ cut here ]------------ [ 8904.492910] WARNING: at net/ipv4/tcp.c:1669 tcp_recvmsg+0xd1c/0xe90() [ 8904.500614] recvmsg bug 2: copied AFA498B3 seq AFA498B3 rcvnxt AFA49EDC fl 0 [ 8904.508914] Modules linked in: fuse btrfs zlib_deflate raid6_pq xor vfat msdos fat ext4 mbcache jbd2 binfmt_misc bridge stp llc xyvnic(POF) xybridge(POF) sg nfsv3 nfs fscache iTCO_wdt iTCO_vendor_support raid1 dm_mirror dm_region_hash dm_log dm_mod coretemp kvm_intel ipmi_devintf kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul sb_edac glue_helper ablk_helper lpc_ich ses cryptd i2c_i801 pcspkr edac_core mfd_core enclosure ioatdma ipmi_si ipmi_msghandler shpchp acpi_cpufreq wmi mperf acpi_pad nfsd auth_rpcgss nfs_acl lockd sunrpc xfs libcrc32c sd_mod sr_mod cdrom crc_t10dif crct10dif_common mlx4_en usb_storage ast syscopyarea sysfillrect ixgbe sysimgblt i2c_algo_bit drm_kms_helper ttm mdio ahci e1000e libahci dca drm mpt3sas ptp crc32c_intel libata mlx4_core i2c_core [ 8904.588598] raid_class pps_core scsi_transport_sas [ 8904.593575] CPU: 2 PID: 26342 Comm: ssh Tainted: PF W O-------------- 3.10.0-123.20.1.el7.6.xrs7.x86_64 #1 [ 8904.605399] Hardware name: Seagate CS6000AC/Type2 - Board Product Summit Point, BIOS SummitPoint.v03.0005 12/12/2014 [ 8904.617329] ffff880451583c18 00000000eae1daff ffff880451583bd0 ffffffff815e2b0c [ 8904.626232] ffff880451583c08 ffffffff8105dee1 ffff880464f16100 00000000ffffffff [ 8904.635139] ffff88045b0aaaac ffff88045b0aa610 0000000000000000 ffff880451583c70 [ 8904.644060] Call Trace: [ 8904.647954] [<ffffffff815e2b0c>] dump_stack+0x19/0x1b [ 8904.654551] [<ffffffff8105dee1>] warn_slowpath_common+0x61/0x80 [ 8904.662017] [<ffffffff8105df5c>] warn_slowpath_fmt+0x5c/0x80 [ 8904.669200] [<ffffffff815ea202>] ? _raw_spin_lock_bh+0x12/0x50 [ 8904.676556] [<ffffffff8151ae4c>] tcp_recvmsg+0xd1c/0xe90 [ 8904.683359] [<ffffffff8154347b>] inet_recvmsg+0x7b/0xa0 [ 8904.690037] [<ffffffff814b7316>] sock_aio_read.part.7+0x146/0x160 [ 8904.697559] [<ffffffff811c3701>] ? set_fd_set+0x21/0x30 [ 8904.704183] [<ffffffff814b7351>] sock_aio_read+0x21/0x30 [ 8904.710855] [<ffffffff811aeffd>] do_sync_read+0x8d/0xd0 [ 8904.717411] [<ffffffff811af785>] vfs_read+0x145/0x170 [ 8904.723752] [<ffffffff811b0208>] SyS_read+0x58/0xb0 [ 8904.729891] [<ffffffff815f3219>] system_call_fastpath+0x16/0x1b [ 8904.737044] ---[ end trace e338b9f1a546ee37 ]--- [ 8904.742782] ------------[ cut here ]------------ [ 8904.748524] WARNING: at net/ipv4/tcp.c:1657 tcp_recvmsg+0x4f7/0xe90() [ 8904.756103] recvmsg bug: copied AFA498B3 seq AFA49EB3 rcvnxt AFA49EDC fl 0 [ 8904.764108] Modules linked in: fuse btrfs zlib_deflate raid6_pq xor vfat msdos fat ext4 mbcache jbd2 binfmt_misc bridge stp llc xyvnic(POF) xybridge(POF) sg nfsv3 nfs fscache iTCO_wdt iTCO_vendor_support raid1 dm_mirror dm_region_hash dm_log dm_mod coretemp kvm_intel ipmi_devintf kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul sb_edac glue_helper ablk_helper lpc_ich ses cryptd i2c_i801 pcspkr edac_core mfd_core enclosure ioatdma ipmi_si ipmi_msghandler shpchp acpi_cpufreq wmi mperf acpi_pad nfsd auth_rpcgss nfs_acl lockd sunrpc xfs libcrc32c sd_mod sr_mod cdrom crc_t10dif crct10dif_common mlx4_en usb_storage ast syscopyarea sysfillrect ixgbe sysimgblt i2c_algo_bit drm_kms_helper ttm mdio ahci e1000e libahci dca drm mpt3sas ptp crc32c_intel libata mlx4_core i2c_core [ 8904.843667] raid_class pps_core scsi_transport_sas [ 8904.848645] CPU: 2 PID: 26342 Comm: ssh Tainted: PF W O-------------- 3.10.0-123.20.1.el7.6.xrs7.x86_64 #1 [ 8904.860468] Hardware name: Seagate CS6000AC/Type2 - Board Product Summit Point, BIOS SummitPoint.v03.0005 12/12/2014 [ 8904.872408] ffff880451583c18 00000000eae1daff ffff880451583bd0 ffffffff815e2b0c [ 8904.881315] ffff880451583c08 ffffffff8105dee1 ffff880464f16600 00000000ffffffff [ 8904.890230] ffff88045b0aaaac ffff88045b0aa610 0000000000000000 ffff880451583c70 [ 8904.899157] Call Trace: [ 8904.903053] [<ffffffff815e2b0c>] dump_stack+0x19/0x1b [ 8904.909640] [<ffffffff8105dee1>] warn_slowpath_common+0x61/0x80 [ 8904.917105] [<ffffffff8105df5c>] warn_slowpath_fmt+0x5c/0x80 [ 8904.924335] [<ffffffff815ea202>] ? _raw_spin_lock_bh+0x12/0x50 [ 8904.931686] [<ffffffff8151a627>] tcp_recvmsg+0x4f7/0xe90 [ 8904.938488] [<ffffffff8154347b>] inet_recvmsg+0x7b/0xa0 [ 8904.945168] [<ffffffff814b7316>] sock_aio_read.part.7+0x146/0x160 [ 8904.952626] [<ffffffff811c3701>] ? set_fd_set+0x21/0x30 [ 8904.959133] [<ffffffff814b7351>] sock_aio_read+0x21/0x30 [ 8904.965713] [<ffffffff811aeffd>] do_sync_read+0x8d/0xd0 [ 8904.972104] [<ffffffff811af785>] vfs_read+0x145/0x170 [ 8904.978313] [<ffffffff811b0208>] SyS_read+0x58/0xb0 [ 8904.984258] [<ffffffff815f3219>] system_call_fastpath+0x16/0x1b [ 8904.991223] ---[ end trace e338b9f1a546ee38 ]---