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Message-Id: <87C19B32-53F2-435C-8B9F-15F80639226D@gmail.com> Date: Mon, 24 Feb 2025 11:08:40 +0200 From: Martin Zaharinov <micron10@...il.com> To: Eric Dumazet <edumazet@...gle.com> Cc: netdev@...r.kernel.org, kuba@...nel.org, pabeni@...hat.com, willemb@...gle.com, lulie@...ux.alibaba.com, aleksander.lobakin@...el.com, dust.li@...ux.alibaba.com, hustcat@...il.com, jasowang@...hat.com, jdamato@...tly.com Subject: Re: Bug Report in Virtio_net driver and skb_try_coalesce Hey Eric, Yes i find a issue : https://patchwork.kernel.org/project/netdevbpf/patch/20240419222328.3231075-1-dwilder@us.ibm.com/#25819022 this patch i apply before many months , and this patch make issueee….. Sorry for disturbed you !!! Best regards, Martin P.S. Thanks for fast response. And sorry again! > On 24 Feb 2025, at 9:21, Eric Dumazet <edumazet@...gle.com> wrote: > > On Mon, Feb 24, 2025 at 6:13 AM Martin Zaharinov <micron10@...il.com> wrote: >> >> Hello all, >> >> i have this issue fro kernel 6.12 and still is here with kernel 6.13.4 >> >> when run vm with virtio_net as ethernet card >> start traffic like try to scp file to this vm and machine crash with second debug. >> First is when system boot . >> >> any help to fix this . >> >> Best regards, >> Martin >> >> [ 19.070538][ C7] ------------[ cut here ]------------ >> [ 19.071165][ C7] WARNING: CPU: 7 PID: 0 at net/core/skbuff.c:6075 skb_try_coalesce+0x495/0x520 > > This is a bit strange, because in 6.13.4 the WARN_ON_ONCE(delta < > len); should be at line 6072 > >> [ 19.072094][ C7] Modules linked in: nf_conntrack_sip(-) nf_conntrack_ftp nf_conntrack_pptp nft_ct nft_nat nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables netconsole vmxnet3 virtio_net net_failover failover virtio_pci virtio_pci_legacy_dev virtio_pci_modern_dev virtio virtio_ring e1000 e1000e tap tun aesni_intel gf128mul crypto_simd cryptd >> [ 19.075316][ C7] CPU: 7 UID: 0 PID: 0 Comm: swapper/7 Tainted: G O 6.13.4 #2 >> [ 19.076047][ C7] Tainted: [O]=OOT_MODULE >> [ 19.076456][ C7] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 >> [ 19.077608][ C7] RIP: 0010:skb_try_coalesce+0x495/0x520 >> [ 19.078049][ C7] Code: 00 00 0f 85 ef fd ff ff 49 8b 11 80 e2 40 0f 84 e3 fd ff ff 49 8b 51 48 f6 c2 01 0f 84 d6 fd ff ff 4c 8d 4a ff e9 cd fd ff ff <0f> 0b e9 fc fd ff ff 0f 0b 31 c0 e9 cd fe ff ff 4c 8d 4e ff e9 b4 >> [ 19.079500][ C7] RSP: 0018:ffff9aaf002a4c90 EFLAGS: 00010297 >> [ 19.079969][ C7] RAX: ffff9aaf002a4d03 RBX: ffff917408a6b900 RCX: 00000000000000c0 >> [ 19.080582][ C7] RDX: 00000000fffffdc0 RSI: ffff9174059e3800 RDI: 0000000000000598 >> [ 19.081178][ C7] RBP: ffff917408a6b100 R08: 0000000000000001 R09: 0000000000000000 >> [ 19.081781][ C7] R10: 0000000000000000 R11: 00000000000000c0 R12: ffff9aaf002a4d04 >> [ 19.082600][ C7] R13: 0000000000000598 R14: ffff9175059e35c0 R15: ffff9175059e2dc0 >> [ 19.083465][ C7] FS: 0000000000000000(0000) GS:ffff917577dc0000(0000) knlGS:0000000000000000 >> [ 19.084492][ C7] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> [ 19.085203][ C7] CR2: 00007f56364bdd78 CR3: 0000000104866000 CR4: 00000000003506f0 >> [ 19.086077][ C7] Call Trace: >> [ 19.086436][ C7] <IRQ> >> [ 19.086751][ C7] ? show_trace_log_lvl+0x1a2/0x260 >> [ 19.087312][ C7] ? inet_frag_reasm_finish+0xef/0x380 >> [ 19.087903][ C7] ? skb_try_coalesce+0x495/0x520 >> [ 19.088442][ C7] ? __warn.cold+0x90/0x9e >> [ 19.088917][ C7] ? skb_try_coalesce+0x495/0x520 >> [ 19.089460][ C7] ? report_bug+0xf2/0x1f0 >> [ 19.089934][ C7] ? handle_bug+0x4f/0x90 >> [ 19.090397][ C7] ? exc_invalid_op+0x17/0x160 >> [ 19.090907][ C7] ? asm_exc_invalid_op+0x16/0x20 >> [ 19.091447][ C7] ? skb_try_coalesce+0x495/0x520 >> [ 19.091993][ C7] inet_frag_reasm_finish+0xef/0x380 >> [ 19.092560][ C7] ip_frag_queue+0x507/0x670 >> [ 19.093059][ C7] ip_defrag+0x93/0x130 >> [ 19.093493][ C7] ip_local_deliver+0x38/0xc0 >> [ 19.094013][ C7] process_backlog+0xcb/0x1f0 >> [ 19.094516][ C7] __napi_poll+0x20/0x130 >> [ 19.094992][ C7] net_rx_action+0x306/0x3e0 >> [ 19.095486][ C7] ? enqueue_dl_entity+0x42f/0xa80 >> [ 19.096047][ C7] ? enqueue_task_fair+0x21a/0xb00 >> [ 19.096595][ C7] ? __napi_schedule+0x97/0xa0 >> [ 19.097101][ C7] handle_softirqs+0xde/0x1d0 >> [ 19.097605][ C7] irq_exit_rcu+0xac/0xd0 >> [ 19.097964][ C7] common_interrupt+0x79/0xa0 >> [ 19.098414][ C7] </IRQ> >> [ 19.098737][ C7] <TASK> >> [ 19.099055][ C7] asm_common_interrupt+0x22/0x40 >> [ 19.099599][ C7] RIP: 0010:default_idle+0xb/0x10 >> [ 19.100144][ C7] Code: 07 76 e7 48 89 07 49 c7 c0 08 00 00 00 4d 29 c8 4c 01 c7 4c 29 c2 e9 72 ff ff ff cc cc cc cc eb 07 0f 00 2d 37 f9 33 00 fb f4 <fa> c3 0f 1f 00 65 48 8b 35 98 ff 55 7c f0 80 4e 02 20 48 8b 06 a8 >> [ 19.102223][ C7] RSP: 0018:ffff9aaf000efef0 EFLAGS: 00000202 >> [ 19.102825][ C7] RAX: ffff917577dc0000 RBX: ffff91740083bdc0 RCX: 00000000ffffffff >> [ 19.103447][ C7] RDX: 0000000000000000 RSI: 000000046bc5c460 RDI: 00000000000234d4 >> [ 19.104075][ C7] RBP: 0000000000000007 R08: 0000000000000001 R09: 00000000fff8da2a >> [ 19.104703][ C7] R10: 0000000000000001 R11: 0000000000001800 R12: 0000000000000000 >> [ 19.105326][ C7] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 >> [ 19.105953][ C7] default_idle_call+0x20/0x40 >> [ 19.106334][ C7] do_idle+0x1a4/0x1d0 >> [ 19.106658][ C7] cpu_startup_entry+0x20/0x30 >> [ 19.107042][ C7] start_secondary+0xe1/0xf0 >> [ 19.107405][ C7] common_startup_64+0x13e/0x148 >> [ 19.107802][ C7] </TASK> >> [ 19.108041][ C7] ---[ end trace 0000000000000000 ]— >> >> >> >> [ 101.473110][ C5] BUG: unable to handle page fault for address: ffff91742f6ed1ec >> [ 101.473731][ C5] #PF: supervisor write access in kernel mode >> [ 101.474181][ C5] #PF: error_code(0x0003) - permissions violation >> [ 101.474661][ C5] PGD 233c01067 P4D 233c01067 PUD 101bbf063 PMD 13f3cf063 PTE 800000012f6ed121 >> [ 101.475326][ C5] Oops: Oops: 0003 [#1] SMP >> [ 101.475662][ C5] CPU: 5 UID: 0 PID: 0 Comm: swapper/5 Tainted: G W O 6.13.4 #2 >> [ 101.476318][ C5] Tainted: [W]=WARN, [O]=OOT_MODULE >> [ 101.476706][ C5] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 >> [ 101.477616][ C5] RIP: 0010:memcpy_orig+0x68/0x110 >> [ 101.477997][ C5] Code: 83 c2 20 eb 44 48 01 d6 48 01 d7 48 83 ea 20 0f 1f 00 48 83 ea 20 4c 8b 46 f8 4c 8b 4e f0 4c 8b 56 e8 4c 8b 5e e0 48 8d 76 e0 <4c> 89 47 f8 4c 89 4f f0 4c 89 57 e8 4c 89 5f e0 48 8d 7f e0 73 d2 >> [ 101.479467][ C5] RSP: 0018:ffff9aaf0022cc58 EFLAGS: 00010206 >> [ 101.479918][ C5] RAX: ffff91742f6ec840 RBX: ffff91740ac63100 RCX: 0000000000000000 >> [ 101.480519][ C5] RDX: 0000000000000974 RSI: ffff917400396630 RDI: ffff91742f6ed1f4 >> [ 101.481110][ C5] RBP: 00000000000009b4 R08: bd71b2c82ec828b5 R09: 516abfaa22e30e4c >> [ 101.481705][ C5] R10: 70129ddb96fbe60f R11: 877be8f28680b588 R12: ffff917400395c90 >> [ 101.482294][ C5] R13: 000000000000000c R14: 0000000000005c9c R15: fffff4a18400e400 >> [ 101.482889][ C5] FS: 0000000000000000(0000) GS:ffff917577d40000(0000) knlGS:0000000000000000 >> [ 101.483554][ C5] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> [ 101.484041][ C5] CR2: ffff91742f6ed1ec CR3: 0000000109555000 CR4: 00000000003506f0 >> [ 101.484635][ C5] Call Trace: >> [ 101.484878][ C5] <IRQ> >> [ 101.485088][ C5] ? show_trace_log_lvl+0x1a2/0x260 >> [ 101.485478][ C5] ? page_to_skb+0x378/0x5e0 [virtio_net] >> [ 101.485903][ C5] ? __die+0x4d/0x8a >> [ 101.486190][ C5] ? page_fault_oops+0x83/0x190 >> [ 101.486553][ C5] ? kernelmode_fixup_or_oops.constprop.0+0x33/0x1d0 >> [ 101.487049][ C5] ? exc_page_fault+0x91/0xa0 >> [ 101.487395][ C5] ? asm_exc_page_fault+0x22/0x30 >> [ 101.487771][ C5] ? memcpy_orig+0x68/0x110 >> [ 101.488103][ C5] page_to_skb+0x378/0x5e0 [virtio_net] >> [ 101.488518][ C5] receive_buf+0x2ba/0xb70 [virtio_net] >> [ 101.488930][ C5] ? kmem_cache_free+0x287/0x2d0 >> [ 101.489295][ C5] virtnet_poll+0x4f6/0x6c0 [virtio_net] >> [ 101.489717][ C5] __napi_poll+0x20/0x130 >> [ 101.490037][ C5] net_rx_action+0x1c7/0x3e0 >> [ 101.490376][ C5] ? __napi_schedule+0x97/0xa0 >> [ 101.490732][ C5] handle_softirqs+0xde/0x1d0 >> [ 101.491078][ C5] irq_exit_rcu+0xac/0xd0 >> [ 101.491398][ C5] common_interrupt+0x79/0xa0 >> [ 101.491755][ C5] </IRQ> >> [ 101.491972][ C5] <TASK> >> [ 101.492188][ C5] asm_common_interrupt+0x22/0x40 >> [ 101.492564][ C5] RIP: 0010:default_idle+0xb/0x10 >> [ 101.492939][ C5] Code: 07 76 e7 48 89 07 49 c7 c0 08 00 00 00 4d 29 c8 4c 01 c7 4c 29 c2 e9 72 ff ff ff cc cc cc cc eb 07 0f 00 2d 37 f9 33 00 fb f4 <fa> c3 0f 1f 00 65 48 8b 35 98 ff 55 7c f0 80 4e 02 20 48 8b 06 a8 >> [ 101.494404][ C5] RSP: 0018:ffff9aaf000dfef0 EFLAGS: 00000212 >> [ 101.494860][ C5] RAX: ffff917577d40000 RBX: ffff917400839b40 RCX: 00000000ffffffff >> [ 101.495455][ C5] RDX: 0000000000000000 RSI: 000000179b776480 RDI: 00000000000510ec >> [ 101.496048][ C5] RBP: 0000000000000005 R08: 0000000000000001 R09: 00000000fffaf2b0 >> [ 101.496643][ C5] R10: 0000000000000001 R11: 0000000000016c00 R12: 0000000000000000 >> [ 101.497234][ C5] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 >> [ 101.497829][ C5] default_idle_call+0x20/0x40 >> [ 101.498183][ C5] do_idle+0x1a4/0x1d0 >> [ 101.498488][ C5] cpu_startup_entry+0x20/0x30 >> [ 101.498842][ C5] start_secondary+0xe1/0xf0 >> [ 101.499183][ C5] common_startup_64+0x13e/0x148 >> [ 101.499553][ C5] </TASK> >> [ 101.499777][ C5] Modules linked in: xsk_diag unix_diag pppoe pppox ppp_generic slhc nf_conntrack_sip nf_conntrack_ftp nf_conntrack_pptp nft_ct nft_nat nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables netconsole vmxnet3 virtio_net net_failover failover virtio_pci virtio_pci_legacy_dev virtio_pci_modern_dev virtio virtio_ring e1000 e1000e tap tun aesni_intel gf128mul crypto_simd cryptd >> [ 101.502860][ C5] CR2: ffff91742f6ed1ec >> [ 101.503168][ C5] ---[ end trace 0000000000000000 ]--- >> [ 101.503578][ C5] RIP: 0010:memcpy_orig+0x68/0x110 >> [ 101.503959][ C5] Code: 83 c2 20 eb 44 48 01 d6 48 01 d7 48 83 ea 20 0f 1f 00 48 83 ea 20 4c 8b 46 f8 4c 8b 4e f0 4c 8b 56 e8 4c 8b 5e e0 48 8d 76 e0 <4c> 89 47 f8 4c 89 4f f0 4c 89 57 e8 4c 89 5f e0 48 8d 7f e0 73 d2 >> [ 101.505439][ C5] RSP: 0018:ffff9aaf0022cc58 EFLAGS: 00010206 >> [ 101.505897][ C5] RAX: ffff91742f6ec840 RBX: ffff91740ac63100 RCX: 0000000000000000 >> [ 101.506492][ C5] RDX: 0000000000000974 RSI: ffff917400396630 RDI: ffff91742f6ed1f4 >> [ 101.507084][ C5] RBP: 00000000000009b4 R08: bd71b2c82ec828b5 R09: 516abfaa22e30e4c >> [ 101.507679][ C5] R10: 70129ddb96fbe60f R11: 877be8f28680b588 R12: ffff917400395c90 >> [ 101.508269][ C5] R13: 000000000000000c R14: 0000000000005c9c R15: fffff4a18400e400 >> [ 101.508864][ C5] FS: 0000000000000000(0000) GS:ffff917577d40000(0000) knlGS:0000000000000000 >> [ 101.509533][ C5] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> [ 101.510024][ C5] CR2: ffff91742f6ed1ec CR3: 0000000109555000 CR4: 00000000003506f0 >> [ 101.510631][ C5] Kernel panic - not syncing: Fatal exception in interrupt >> [ 101.511284][ C5] Kernel Offset: 0x2000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) >> [ 101.512159][ C5] Rebooting in 10 seconds..
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