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Message-ID: <CAA85sZvZ4Nuz6yk2ditVGoS0c2wcKU=MwUzOUoC2QT3_hjQ6FQ@mail.gmail.com> Date: Wed, 5 Feb 2025 12:43:50 +0100 From: Ian Kumlien <ian.kumlien@...il.com> To: Linux Kernel Network Developers <netdev@...r.kernel.org> Cc: tariqt@...dia.com, Paolo Abeni <pabeni@...hat.com> Subject: Bug when trying to use a old mellanox connextx-3 pro Hi, Was thinking of switching my firewall from gigabit networking to 10gbit, and connectx-3 pro seemed like a ok fit (very cheap and works with a pcie x4 slot) Anyway, booting using that interface results in a kernel oops after just a few seconds... I assume it could be related to this being enabled by default: ethtool -k enp2s0 |grep rx-gro-list rx-gro-list: on I have had similar issues with gro-lists when playing with tun/tap devices (haven't had the time to debug it yet though) (Which is why I included you Paolo, it could however be completely unrelated) Anyway, here is the kernel oops <4>[ 34.088397] ------------[ cut here ]------------ <2>[ 34.088406] kernel BUG at ./include/linux/skbuff.h:2773! <4>[ 34.088422] Oops: invalid opcode: 0000 [#1] PREEMPT_RT SMP NOPTI <4>[ 34.088433] CPU: 11 UID: 0 PID: 2404 Comm: irq/108-mlx4-8@ Not tainted 6.13.1 #441 <4>[ 34.088442] Hardware name: Supermicro Super Server/A2SDi-12C-HLN4F, BIOS 1.9a 12/25/2023 <4>[ 34.088446] RIP: 0010:skb_pull (./include/linux/skbuff.h:2773 ./include/linux/skbuff.h:2780 net/core/skbuff.c:2653) <4>[ 34.088461] Code: 39 f0 72 1f 29 f0 89 47 70 3b 47 74 72 1c 89 f0 48 03 87 d0 00 00 00 48 89 87 d0 00 00 00 c3 cc cc cc cc 31 c0 c3 cc cc cc cc <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 All code ======== 0: 39 f0 cmp %esi,%eax 2: 72 1f jb 0x23 4: 29 f0 sub %esi,%eax 6: 89 47 70 mov %eax,0x70(%rdi) 9: 3b 47 74 cmp 0x74(%rdi),%eax c: 72 1c jb 0x2a e: 89 f0 mov %esi,%eax 10: 48 03 87 d0 00 00 00 add 0xd0(%rdi),%rax 17: 48 89 87 d0 00 00 00 mov %rax,0xd0(%rdi) 1e: c3 ret 1f: cc int3 20: cc int3 21: cc int3 22: cc int3 23: 31 c0 xor %eax,%eax 25: c3 ret 26: cc int3 27: cc int3 28: cc int3 29: cc int3 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 90 nop 31: 90 nop 32: 90 nop 33: 90 nop 34: 90 nop 35: 90 nop 36: 90 nop 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 41 57 push %r15 3f: 41 rex.B Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 41 57 push %r15 15: 41 rex.B <4>[ 34.088468] RSP: 0018:ffffa047c1c67a78 EFLAGS: 00010297 <4>[ 34.088476] RAX: 0000000000000578 RBX: ffff94c1070d7400 RCX: 0000000000000000 <4>[ 34.088481] RDX: ffff94c105152400 RSI: 0000000000000034 RDI: ffff94c1039f6f00 <4>[ 34.088485] RBP: ffff94c1039f6f00 R08: 0000000000000000 R09: 0000000000000000 <4>[ 34.088489] R10: 0000000000000000 R11: 0000000000000001 R12: ffff94c1039f6f00 <4>[ 34.088493] R13: 000000000e041080 R14: 0000000000000578 R15: 0000000000000578 <4>[ 34.088498] FS: 0000000000000000(0000) GS:ffff94c46fcc0000(0000) knlGS:0000000000000000 <4>[ 34.088504] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 <4>[ 34.088509] CR2: 0000562f4233b000 CR3: 000000010596e000 CR4: 00000000003526f0 <4>[ 34.088514] Call Trace: <4>[ 34.088519] <TASK> <4>[ 34.088523] ? __die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434) <4>[ 34.088534] ? die (arch/x86/kernel/dumpstack.c:449) <4>[ 34.088541] ? do_trap (arch/x86/kernel/traps.c:156 arch/x86/kernel/traps.c:197) <4>[ 34.088553] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:218) <4>[ 34.088562] ? skb_pull (./include/linux/skbuff.h:2773 ./include/linux/skbuff.h:2780 net/core/skbuff.c:2653) <4>[ 34.088570] ? exc_invalid_op (arch/x86/kernel/traps.c:316) <4>[ 34.088578] ? skb_pull (./include/linux/skbuff.h:2773 ./include/linux/skbuff.h:2780 net/core/skbuff.c:2653) <4>[ 34.088585] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) <4>[ 34.088597] ? skb_pull (./include/linux/skbuff.h:2773 ./include/linux/skbuff.h:2780 net/core/skbuff.c:2653) <4>[ 34.088605] skb_gro_receive_list (net/core/gro.c:242) <4>[ 34.088614] tcp_gro_receive (./include/linux/skbuff.h:1670 ./include/linux/skbuff.h:5049 net/ipv4/tcp_offload.c:371) <4>[ 34.088626] inet_gro_receive (./include/net/gro.h:367 (discriminator 1) net/ipv4/af_inet.c:1545 (discriminator 1)) <4>[ 34.088637] dev_gro_receive (net/core/gro.c:516 (discriminator 4)) <4>[ 34.088645] ? __napi_build_skb (net/core/skbuff.c:545) <4>[ 34.088655] napi_gro_frags (net/core/gro.c:765) <4>[ 34.088661] mlx4_en_process_rx_cq (drivers/net/ethernet/mellanox/mlx4/en_rx.c:955) <4>[ 34.088671] ? mlx4_en_free_tx_desc (drivers/net/ethernet/mellanox/mlx4/en_tx.c:339 (discriminator 1)) <4>[ 34.088682] mlx4_en_poll_rx_cq (drivers/net/ethernet/mellanox/mlx4/en_rx.c:1021) <4>[ 34.088690] __napi_poll.constprop.0 (net/core/dev.c:6902) <4>[ 34.088700] net_rx_action (net/core/dev.c:6973 net/core/dev.c:7093) <4>[ 34.088709] ? asm_common_interrupt (./arch/x86/include/asm/idtentry.h:693) <4>[ 34.088718] ? mlx4_cq_completion (drivers/net/ethernet/mellanox/mlx4/cq.c:113) <4>[ 34.088729] ? __napi_schedule (net/core/dev.c:4577 net/core/dev.c:4545 net/core/dev.c:6198) <4>[ 34.088737] ? mlx4_eq_int (drivers/net/ethernet/mellanox/mlx4/eq.c:523) <4>[ 34.088743] ? update_curr_rt (kernel/sched/rt.c:997) <4>[ 34.088751] handle_softirqs.isra.0 (./arch/x86/include/asm/jump_label.h:36 ./include/trace/events/irq.h:142 kernel/softirq.c:562) <4>[ 34.088764] __local_bh_enable_ip (kernel/softirq.c:246) <4>[ 34.088770] irq_forced_thread_fn (kernel/irq/manage.c:1207) <4>[ 34.088782] irq_thread (kernel/irq/manage.c:1325) <4>[ 34.088791] ? __pfx_irq_forced_thread_fn (kernel/irq/manage.c:1192) <4>[ 34.088802] ? __pfx_irq_thread_dtor (kernel/irq/manage.c:1234) <4>[ 34.088812] ? __pfx_irq_thread (kernel/irq/manage.c:1301) <4>[ 34.088821] kthread (kernel/kthread.c:389) <4>[ 34.088830] ? __pfx_kthread (kernel/kthread.c:342) <4>[ 34.088838] ret_from_fork (arch/x86/kernel/process.c:153) <4>[ 34.088849] ? __pfx_kthread (kernel/kthread.c:342) <4>[ 34.088857] ret_from_fork_asm (arch/x86/entry/entry_64.S:254) <4>[ 34.088870] </TASK> <4>[ 34.088873] Modules linked in: chaoskey <4>[ 34.088885] ---[ end trace 0000000000000000 ]---
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