Hi Michal, On 11/12/2019 12.48, Michal Sojka wrote:
I use usb_8dev USB2CAN converter and I'm getting non-killable processes and the following warnings in dmesg. Any idea, how to fix it?
Dec 11 10:27:38 kernel: usb 1-5.2: new full-speed USB device number 12 using xhci_hcd Dec 11 10:27:38 kernel: usb 1-5.2: New USB device found, idVendor=0483, idProduct=1234, bcdDevice= 1.00 Dec 11 10:27:38 kernel: usb 1-5.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Dec 11 10:27:38 kernel: usb 1-5.2: Product: USB2CAN converter Dec 11 10:27:38 kernel: usb 1-5.2: Manufacturer: 8Devices Dec 11 10:27:38 kernel: usb 1-5.2: SerialNumber: 7272B673 Dec 11 10:27:38 kernel: usb_8dev 1-5.2:1.0 can0: firmware: 2.1, hardware: 2.0
Is this the new version with the blue housing? https://www.8devices.com/products/usb2can_korlan
... Dec 11 10:28:54 kernel: ------------[ cut here ]------------ Dec 11 10:28:54 kernel: WARNING: CPU: 5 PID: 0 at net/core/skbuff.c:651 skb_release_head_state.cold+0xc/0x17
Dec 11 10:28:54 kernel: CPU: 5 PID: 0 Comm: swapper/5 Not tainted 5.3.0-1-amd64 #1 Debian 5.3.7-1
Dec 11 10:28:54 kernel: RIP: 0010:skb_release_head_state.cold+0xc/0x17 Dec 11 10:28:54 kernel: Code: 54 24 08 e8 1c 57 ae ff 0f 0b 48 8b 54 24 08 48 8b 74 24 10 4c 63 4c 24 1c e9 b2 93 ff ff 48 c7 c7 60 4b c6 8d e8 fa 56 ae ff <0f> 0b 48 8b 43 60 e9 1d 9e ff ff 44 89 ce 48 c7 c7 c8 6a d0 8d e8 Dec 11 10:28:54 kernel: RSP: 0018:ffffb8cf401c8cb8 EFLAGS: 00010046 Dec 11 10:28:54 kernel: RAX: 0000000000000024 RBX: ffff93e8bb326d00 RCX: 0000000000000000 Dec 11 10:28:54 kernel: RDX: 0000000000000000 RSI: ffff93e8bdb57688 RDI: ffff93e8bdb57688 Dec 11 10:28:54 kernel: RBP: ffff93e8bb326d00 R08: ffff93e8bdb57688 R09: 0000000000000004 Dec 11 10:28:54 kernel: R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8d413959 Dec 11 10:28:54 kernel: R13: ffff93e8bb326d00 R14: 0000000000000082 R15: ffff93e8bdb6b64c Dec 11 10:28:54 kernel: FS: 0000000000000000(0000) GS:ffff93e8bdb40000(0000) knlGS:0000000000000000 Dec 11 10:28:54 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Dec 11 10:28:54 kernel: CR2: 00000042084c6000 CR3: 0000000344a0a005 CR4: 00000000003606e0 Dec 11 10:28:54 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Dec 11 10:28:54 kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Dec 11 10:28:54 kernel: Call Trace: Dec 11 10:28:54 kernel: <IRQ> Dec 11 10:28:54 kernel: skb_release_all+0xe/0x30 Dec 11 10:28:54 kernel: kfree_skb+0x32/0xa0 Dec 11 10:28:54 kernel: enqueue_to_backlog+0x99/0x230 Dec 11 10:28:54 kernel: ? recalibrate_cpu_khz+0x10/0x10 Dec 11 10:28:54 kernel: netif_rx_internal+0x41/0x100 Dec 11 10:28:54 kernel: netif_rx+0x18/0xb0 Dec 11 10:28:54 kernel: can_get_echo_skb+0x32/0x60 [can_dev] Dec 11 10:28:54 kernel: usb_8dev_write_bulk_callback+0x7d/0xb0 [usb_8dev] Dec 11 10:28:54 kernel: __usb_hcd_giveback_urb+0x6f/0x120 [usbcore]
Did you do anything weird (e.g. pulling the USB plug on the run) to get this problem?
Best, Oliver
