From: Kurt Kanzenbach <kurt@linutronix.de>
To: netdev@vger.kernel.org
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Song Yoong Siang <yoong.siang.song@intel.com>
Subject: stmmac and XDP/ZC issue
Date: Tue, 20 Feb 2024 12:02:25 +0100 [thread overview]
Message-ID: <87r0h7wg8u.fsf@kurt.kurt.home> (raw)
[-- Attachment #1: Type: text/plain, Size: 4127 bytes --]
Hello netdev community,
after updating to v6.8 kernel I've encountered an issue in the stmmac
driver.
I have an application which makes use of XDP zero-copy sockets. It works
on v6.7. On v6.8 it results in the stack trace shown below. The program
counter points to:
- ./include/net/xdp_sock.h:192 and
- ./drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:2681
It seems to be caused by the XDP meta data patches. This one in
particular 1347b419318d ("net: stmmac: Add Tx HWTS support to XDP ZC").
To reproduce:
- Hardware: imx93
- Run ptp4l/phc2sys
- Configure Qbv, Rx steering, NAPI threading
- Run my application using XDP/ZC on queue 1
Any idea what might be the issue here?
Thanks,
Kurt
Stack trace:
|[ 169.248150] imx-dwmac 428a0000.ethernet eth1: configured EST
|[ 191.820913] imx-dwmac 428a0000.ethernet eth1: EST: SWOL has been switched
|[ 226.039166] imx-dwmac 428a0000.ethernet eth1: entered promiscuous mode
|[ 226.203262] imx-dwmac 428a0000.ethernet eth1: Register MEM_TYPE_PAGE_POOL RxQ-0
|[ 226.203753] imx-dwmac 428a0000.ethernet eth1: Register MEM_TYPE_PAGE_POOL RxQ-1
|[ 226.303337] imx-dwmac 428a0000.ethernet eth1: Register MEM_TYPE_XSK_BUFF_POOL RxQ-1
|[ 255.822584] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
|[ 255.822602] Mem abort info:
|[ 255.822604] ESR = 0x0000000096000044
|[ 255.822608] EC = 0x25: DABT (current EL), IL = 32 bits
|[ 255.822613] SET = 0, FnV = 0
|[ 255.822616] EA = 0, S1PTW = 0
|[ 255.822618] FSC = 0x04: level 0 translation fault
|[ 255.822622] Data abort info:
|[ 255.822624] ISV = 0, ISS = 0x00000044, ISS2 = 0x00000000
|[ 255.822627] CM = 0, WnR = 1, TnD = 0, TagAccess = 0
|[ 255.822630] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
|[ 255.822634] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000085fe1000
|[ 255.822638] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000
|[ 255.822650] Internal error: Oops: 0000000096000044 [#1] PREEMPT_RT SMP
|[ 255.822655] Modules linked in:
|[ 255.822660] CPU: 0 PID: 751 Comm: napi/eth1-261 Not tainted 6.8.0-rc4-rt4-00100-g9c63d995ca19 #8
|[ 255.822666] Hardware name: NXP i.MX93 11X11 EVK board (DT)
|[ 255.822669] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
|[ 255.822674] pc : stmmac_tx_clean.constprop.0+0x848/0xc38
|[ 255.822690] lr : stmmac_tx_clean.constprop.0+0x844/0xc38
|[ 255.822696] sp : ffff800085ec3bc0
|[ 255.822698] x29: ffff800085ec3bc0 x28: ffff000005b609e0 x27: 0000000000000001
|[ 255.822706] x26: 0000000000000000 x25: ffff000005b60ae0 x24: 0000000000000001
|[ 255.822712] x23: 0000000000000001 x22: ffff000005b649e0 x21: 0000000000000000
|[ 255.822719] x20: 0000000000000020 x19: ffff800085291030 x18: 0000000000000000
|[ 255.822725] x17: ffff7ffffc51c000 x16: ffff800080000000 x15: 0000000000000008
|[ 255.822732] x14: ffff80008369b880 x13: 0000000000000000 x12: 0000000000008507
|[ 255.822738] x11: 0000000000000040 x10: 0000000000000a70 x9 : ffff800080e32f84
|[ 255.822745] x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000003ff0
|[ 255.822751] x5 : 0000000000003c40 x4 : ffff000005b60000 x3 : 0000000000000000
|[ 255.822757] x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
|[ 255.822764] Call trace:
|[ 255.822766] stmmac_tx_clean.constprop.0+0x848/0xc38
|[ 255.822772] stmmac_napi_poll_rxtx+0xc4/0xec0
|[ 255.822778] __napi_poll.constprop.0+0x40/0x220
|[ 255.822785] napi_threaded_poll+0xd8/0x228
|[ 255.822790] kthread+0x108/0x120
|[ 255.822798] ret_from_fork+0x10/0x20
|[ 255.822808] Code: 910303e0 f9003be1 97ffdec0 f9403be1 (f9000020)
|[ 255.822812] ---[ end trace 0000000000000000 ]---
|[ 255.822817] Kernel panic - not syncing: Oops: Fatal exception in interrupt
|[ 255.822819] SMP: stopping secondary CPUs
|[ 255.822827] Kernel Offset: disabled
|[ 255.822829] CPU features: 0x0,c0000000,4002814a,2100720b
|[ 255.822834] Memory Limit: none
|[ 256.062429] ---[ end Kernel panic - not syncing: Oops: Fatal exception in interrupt ]---
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 861 bytes --]
next reply other threads:[~2024-02-20 11:02 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-20 11:02 Kurt Kanzenbach [this message]
2024-02-20 13:18 ` stmmac and XDP/ZC issue Serge Semin
2024-02-20 14:43 ` Maciej Fijalkowski
2024-02-20 21:57 ` Stanislav Fomichev
2024-02-21 7:13 ` Kurt Kanzenbach
2024-02-21 9:21 ` Kurt Kanzenbach
2024-02-21 15:59 ` Maciej Fijalkowski
2024-02-21 17:20 ` Serge Semin
2024-02-22 8:35 ` Kurt Kanzenbach
2024-02-22 10:06 ` Serge Semin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87r0h7wg8u.fsf@kurt.kurt.home \
--to=kurt@linutronix.de \
--cc=bigeasy@linutronix.de \
--cc=netdev@vger.kernel.org \
--cc=yoong.siang.song@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).