Le jeudi 07 octobre 2021 à 06:51 -0700, Eric Dumazet a écrit : > On Thu, Oct 7, 2021 at 6:11 AM Michael S. Tsirkin <mst@xxxxxxxxxx> > wrote: > > On Thu, Oct 07, 2021 at 02:04:22PM +0200, Corentin Noël wrote: > > > I've been experiencing crashes with 5.14-rc1 and above that do > > > not > > > occur with 5.13, > > What about 5.14 ? > > 5.14-rc1 has many bugs we do not want to spend time rediscovering > them... > I've tested on 5.14, 5.15-rc4 and 5.15-rc4 with latest netdev and could reproduce the crash on them all. > > > here is the crash trace: > > > > > > [ 61.346677] skbuff: skb_over_panic: text:ffffffff881ae2c7 > > > len:3762 > > > put:3762 head:ffff8a5ec8c22000 data:ffff8a5ec8c22010 tail:0xec2 > > > end:0xec0 dev:<NULL> > > > [ 61.369192] kernel BUG at net/core/skbuff.c:111! > > > [ 61.372840] invalid opcode: 0000 [#1] SMP PTI > > > [ 61.374892] CPU: 5 PID: 0 Comm: swapper/5 Not tainted 5.14.0- > > > rc1linux-v5.14-rc1-for-mesa-ci.tar.bz2 #1 > > > [ 61.376450] Hardware name: ChromiumOS crosvm, BIOS 0 > > > [ 61.377222] RIP: 0010:skb_panic+0x43/0x45 > > > [ 61.377833] Code: 4f 70 50 8b 87 bc 00 00 00 50 8b 87 b8 00 00 > > > 00 50 > > > ff b7 c8 00 00 00 4c 8b 8f c0 00 00 00 48 c7 c7 18 f1 cf 88 e8 6a > > > 43 fb > > > ff <0f> 0b 48 8b 14 24 48 c7 c1 20 35 b1 88 e8 ab ff ff ff 48 c7 > > > c6 60 > > > [ 61.380566] RSP: 0018:ffffae258017cce0 EFLAGS: 00010246 > > > [ 61.381267] RAX: 000000000000008b RBX: 0000000000000010 RCX: > > > 00000000ffffdfff > > > [ 61.382246] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: > > > 0000000000000000 > > > [ 61.383376] RBP: ffffde6a80230880 R08: ffffffff88f45568 R09: > > > 0000000000009ffb > > > [ 61.384494] R10: 00000000ffffe000 R11: 3fffffffffffffff R12: > > > ffff8a5ec7461200 > > > [ 61.385696] R13: ffff8a5ec8c22000 R14: 0000000000000000 R15: > > > 0000000000000eb2 > > > [ 61.386825] FS: 0000000000000000(0000) > > > GS:ffff8a5febd40000(0000) > > > knlGS:0000000000000000 > > > [ 61.388055] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > > [ 61.389221] CR2: 000000000148a060 CR3: 000000011ae0e005 CR4: > > > 0000000000370ee0 > > > [ 61.390871] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > > > 0000000000000000 > > > [ 61.392335] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > > > 0000000000000400 > > > [ 61.393635] Call Trace: > > > [ 61.394127] <IRQ> > > > [ 61.394488] skb_put.cold+0x10/0x10 > > > [ 61.395095] page_to_skb+0xf7/0x410 > > > [ 61.395689] receive_buf+0x81/0x1660 > > > [ 61.396228] ? netif_receive_skb_list_internal+0x1ad/0x2b0 > > > [ 61.397180] ? napi_gro_flush+0x97/0xe0 > > > [ 61.397896] ? detach_buf_split+0x67/0x120 > > > [ 61.398573] virtnet_poll+0x2cf/0x420 > > > [ 61.399197] __napi_poll+0x25/0x150 > > > [ 61.399764] net_rx_action+0x22f/0x280 > > > [ 61.400394] __do_softirq+0xba/0x257 > > > [ 61.401012] irq_exit_rcu+0x8e/0xb0 > > > [ 61.401618] common_interrupt+0x7b/0xa0 > > > [ 61.402270] </IRQ> > > > [ 61.402620] asm_common_interrupt+0x1e/0x40 > > > [ 61.403302] RIP: 0010:default_idle+0xb/0x10 > > > [ 61.404018] Code: 8b 04 25 00 6d 01 00 f0 80 60 02 df c3 0f ae > > > f0 0f > > > ae 38 0f ae f0 eb b9 0f 1f 80 00 00 00 00 eb 07 0f 00 2d df 3e 44 > > > 00 fb > > > f4 <c3> cc cc cc cc 65 8b 15 31 2f a4 77 89 d2 48 8b 05 d0 a1 0c > > > 01 48 > > > [ 61.407636] RSP: 0018:ffffae258008fef8 EFLAGS: 00000202 > > > [ 61.408394] RAX: ffffffff885ce620 RBX: 0000000000000005 RCX: > > > ffff8a5febd56f80 > > > [ 61.409451] RDX: 0000000000c1ec32 RSI: 7ffffff1b7a1e726 RDI: > > > ffff8a5febd5dd00 > > > [ 61.410530] RBP: ffff8a5fc01f8000 R08: 0000000000c1ec32 R09: > > > 0000000000000000 > > > [ 61.411715] R10: 0000000000000006 R11: 0000000000000002 R12: > > > 0000000000000000 > > > [ 61.412984] R13: 0000000000000000 R14: 0000000000000000 R15: > > > 0000000000000000 > > > [ 61.414183] ? mwait_idle+0x70/0x70 > > > [ 61.414805] ? mwait_idle+0x70/0x70 > > > [ 61.415592] default_idle_call+0x2a/0xa0 > > > [ 61.416216] do_idle+0x1e8/0x250 > > > [ 61.416722] cpu_startup_entry+0x14/0x20 > > > [ 61.417347] secondary_startup_64_no_verify+0xc2/0xcb > > > [ 61.418144] Modules linked in: > > > [ 61.418622] ---[ end trace 3741c3e580a52bbd ]--- > > > [ 61.419399] RIP: 0010:skb_panic+0x43/0x45 > > > [ 61.420054] Code: 4f 70 50 8b 87 bc 00 00 00 50 8b 87 b8 00 00 > > > 00 50 > > > ff b7 c8 00 00 00 4c 8b 8f c0 00 00 00 48 c7 c7 18 f1 cf 88 e8 6a > > > 43 fb > > > ff <0f> 0b 48 8b 14 24 48 c7 c1 20 35 b1 88 e8 ab ff ff ff 48 c7 > > > c6 60 > > > [ 61.422606] RSP: 0018:ffffae258017cce0 EFLAGS: 00010246 > > > [ 61.423865] RAX: 000000000000008b RBX: 0000000000000010 RCX: > > > 00000000ffffdfff > > > [ 61.425031] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: > > > 0000000000000000 > > > [ 61.426229] RBP: ffffde6a80230880 R08: ffffffff88f45568 R09: > > > 0000000000009ffb > > > [ 61.427439] R10: 00000000ffffe000 R11: 3fffffffffffffff R12: > > > ffff8a5ec7461200 > > > [ 61.428615] R13: ffff8a5ec8c22000 R14: 0000000000000000 R15: > > > 0000000000000eb2 > > > [ 61.429799] FS: 0000000000000000(0000) > > > GS:ffff8a5febd40000(0000) > > > knlGS:0000000000000000 > > > [ 61.431048] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > > [ 61.431997] CR2: 000000000148a060 CR3: 000000011ae0e005 CR4: > > > 0000000000370ee0 > > > [ 61.433206] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > > > 0000000000000000 > > > [ 61.434502] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > > > 0000000000000400 > > > [ 61.435799] Kernel panic - not syncing: Fatal exception in > > > interrupt > > > [ 61.439250] Kernel Offset: 0x6a00000 from 0xffffffff81000000 > > > (relocation range: 0xffffffff80000000-0xffffffffbfffffff) > > > > > > Here is my kernel config: > > > https://gitlab.freedesktop.org/tintou/mesa/-/raw/7cf2be0e1c53d1040ff8a973ddeeeb3d93250f8e/.gitlab-ci/container/x86_64.config > > > > > > > > > here is the decoded trace: > > > > > > [ 61.346677] skbuff: skb_over_panic: text:ffffffff881ae2c7 > > > len:3762 > > > put:3762 head:ffff8a5ec8c22000 data:ffff8a5ec8c22010 tail:0xec2 > > > end:0xec0 dev:<NULL> > > > [ 61.369192] kernel BUG at net/core/skbuff.c:111! > > > [ 61.372840] invalid opcode: 0000 [#1] SMP PTI > > > [ 61.374892] CPU: 5 PID: 0 Comm: swapper/5 Not tainted 5.14.0- > > > rc1linux-v5.14-rc1-for-mesa-ci.tar.bz2 #1 > > > [ 61.376450] Hardware name: ChromiumOS crosvm, BIOS 0 > > > [ 61.377222] RIP: skb_panic+0x43/0x45 > > > [ 61.377833] Code: 4f 70 50 8b 87 bc 00 00 00 50 8b 87 b8 00 00 > > > 00 50 > > > ff b7 c8 00 00 00 4c 8b 8f c0 00 00 00 48 c7 c7 18 f1 cf 88 e8 6a > > > 43 fb > > > ff <0f> 0b 48 8b 14 24 48 c7 c1 20 35 b1 88 e8 ab ff ff ff 48 c7 > > > c6 60 > > > All code > > > ======== > > > 0: 4f 70 50 rex.WRXB jo 0x53 > > > 3: 8b 87 bc 00 00 00 mov 0xbc(%rdi),%eax > > > 9: 50 push %rax > > > a: 8b 87 b8 00 00 00 mov 0xb8(%rdi),%eax > > > 10: 50 push %rax > > > 11: ff b7 c8 00 00 00 pushq 0xc8(%rdi) > > > 17: 4c 8b 8f c0 00 00 00 mov 0xc0(%rdi),%r9 > > > 1e: 48 c7 c7 18 f1 cf 88 mov $0xffffffff88cff118,%rdi > > > 25: e8 6a 43 fb ff callq 0xfffffffffffb4394 > > > 2a:* 0f 0b ud2 <-- > > > trapping > > > instruction > > > 2c: 48 8b 14 24 mov (%rsp),%rdx > > > 30: 48 c7 c1 20 35 b1 88 mov $0xffffffff88b13520,%rcx > > > 37: e8 ab ff ff ff callq 0xffffffffffffffe7 > > > 3c: 48 rex.W > > > 3d: c7 .byte 0xc7 > > > 3e: c6 (bad) > > > 3f: 60 (bad) > > > > > > Code starting with the faulting instruction > > > =========================================== > > > 0: 0f 0b ud2 > > > 2: 48 8b 14 24 mov (%rsp),%rdx > > > 6: 48 c7 c1 20 35 b1 88 mov $0xffffffff88b13520,%rcx > > > d: e8 ab ff ff ff callq 0xffffffffffffffbd > > > 12: 48 rex.W > > > 13: c7 .byte 0xc7 > > > 14: c6 (bad) > > > 15: 60 (bad) > > > [ 61.380566] RSP: 0018:ffffae258017cce0 EFLAGS: 00010246 > > > [ 61.381267] RAX: 000000000000008b RBX: 0000000000000010 RCX: > > > 00000000ffffdfff > > > [ 61.382246] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: > > > 0000000000000000 > > > [ 61.383376] RBP: ffffde6a80230880 R08: ffffffff88f45568 R09: > > > 0000000000009ffb > > > [ 61.384494] R10: 00000000ffffe000 R11: 3fffffffffffffff R12: > > > ffff8a5ec7461200 > > > [ 61.385696] R13: ffff8a5ec8c22000 R14: 0000000000000000 R15: > > > 0000000000000eb2 > > > [ 61.386825] FS: 0000000000000000(0000) > > > GS:ffff8a5febd40000(0000) > > > knlGS:0000000000000000 > > > [ 61.388055] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > > [ 61.389221] CR2: 000000000148a060 CR3: 000000011ae0e005 CR4: > > > 0000000000370ee0 > > > [ 61.390871] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > > > 0000000000000000 > > > [ 61.392335] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > > > 0000000000000400 > > > [ 61.393635] Call Trace: > > > [ 61.394127] <IRQ> > > > [ 61.394488] skb_put.cold+0x10/0x10 > > > [ 61.395095] page_to_skb+0xf7/0x410 > > > [ 61.395689] receive_buf+0x81/0x1660 > > > [ 61.396228] ? netif_receive_skb_list_internal+0x1ad/0x2b0 > > > [ 61.397180] ? napi_gro_flush+0x97/0xe0 > > > [ 61.397896] ? detach_buf_split+0x67/0x120 > > > [ 61.398573] virtnet_poll+0x2cf/0x420 > > > [ 61.399197] __napi_poll+0x25/0x150 > > > [ 61.399764] net_rx_action+0x22f/0x280 > > > [ 61.400394] __do_softirq+0xba/0x257 > > > [ 61.401012] irq_exit_rcu+0x8e/0xb0 > > > [ 61.401618] common_interrupt+0x7b/0xa0 > > > [ 61.402270] </IRQ> > > > [ 61.402620] asm_common_interrupt+0x1e/0x40 > > > [ 61.403302] RIP: default_idle+0xb/0x10 > > > [ 61.404018] Code: 8b 04 25 00 6d 01 00 f0 80 60 02 df c3 0f ae > > > f0 0f > > > ae 38 0f ae f0 eb b9 0f 1f 80 00 00 00 00 eb 07 0f 00 2d df 3e 44 > > > 00 fb > > > f4 <c3> cc cc cc cc 65 8b 15 31 2f a4 77 89 d2 48 8b 05 d0 a1 0c > > > 01 48 > > > All code > > > ======== > > > 0: 8b 04 25 00 6d 01 00 mov 0x16d00,%eax > > > 7: f0 80 60 02 df lock andb $0xdf,0x2(%rax) > > > c: c3 retq > > > d: 0f ae f0 mfence > > > 10: 0f ae 38 clflush (%rax) > > > 13: 0f ae f0 mfence > > > 16: eb b9 jmp 0xffffffffffffffd1 > > > 18: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) > > > 1f: eb 07 jmp 0x28 > > > 21: 0f 00 2d df 3e 44 00 verw 0x443edf(%rip) # > > > 0x443f07 > > > 28: fb sti > > > 29: f4 hlt > > > 2a:* c3 retq <-- > > > trapping > > > instruction > > > 2b: cc int3 > > > 2c: cc int3 > > > 2d: cc int3 > > > 2e: cc int3 > > > 2f: 65 8b 15 31 2f a4 77 mov %gs:0x77a42f31(%rip),%edx > > > # 0x77a42f67 > > > 36: 89 d2 mov %edx,%edx > > > 38: 48 8b 05 d0 a1 0c > > > 01 mov 0x10ca1d0(%rip),%rax # > > > 0x10ca20f > > > 3f: 48 rex.W > > > > > > Code starting with the faulting instruction > > > =========================================== > > > 0: c3 retq > > > 1: cc int3 > > > 2: cc int3 > > > 3: cc int3 > > > 4: cc int3 > > > 5: 65 8b 15 31 2f a4 77 mov %gs:0x77a42f31(%rip),%edx > > > # 0x77a42f3d > > > c: 89 d2 mov %edx,%edx > > > e: 48 8b 05 d0 a1 0c > > > 01 mov 0x10ca1d0(%rip),%rax # > > > 0x10ca1e5 > > > 15: 48 rex.W > > > [ 61.407636] RSP: 0018:ffffae258008fef8 EFLAGS: 00000202 > > > [ 61.408394] RAX: ffffffff885ce620 RBX: 0000000000000005 RCX: > > > ffff8a5febd56f80 > > > [ 61.409451] RDX: 0000000000c1ec32 RSI: 7ffffff1b7a1e726 RDI: > > > ffff8a5febd5dd00 > > > [ 61.410530] RBP: ffff8a5fc01f8000 R08: 0000000000c1ec32 R09: > > > 0000000000000000 > > > [ 61.411715] R10: 0000000000000006 R11: 0000000000000002 R12: > > > 0000000000000000 > > > [ 61.412984] R13: 0000000000000000 R14: 0000000000000000 R15: > > > 0000000000000000 > > > [ 61.414183] ? mwait_idle+0x70/0x70 > > > [ 61.414805] ? mwait_idle+0x70/0x70 > > > [ 61.415592] default_idle_call+0x2a/0xa0 > > > [ 61.416216] do_idle+0x1e8/0x250 > > > [ 61.416722] cpu_startup_entry+0x14/0x20 > > > [ 61.417347] secondary_startup_64_no_verify+0xc2/0xcb > > > [ 61.418144] Modules linked in: > > > [ 61.418622] ---[ end trace 3741c3e580a52bbd ]--- > > > [ 61.419399] RIP: skb_panic+0x43/0x45 > > > [ 61.420054] Code: 4f 70 50 8b 87 bc 00 00 00 50 8b 87 b8 00 00 > > > 00 50 > > > ff b7 c8 00 00 00 4c 8b 8f c0 00 00 00 48 c7 c7 18 f1 cf 88 e8 6a > > > 43 fb > > > ff <0f> 0b 48 8b 14 24 48 c7 c1 20 35 b1 88 e8 ab ff ff ff 48 c7 > > > c6 60 > > > All code > > > ======== > > > 0: 4f 70 50 rex.WRXB jo 0x53 > > > 3: 8b 87 bc 00 00 00 mov 0xbc(%rdi),%eax > > > 9: 50 push %rax > > > a: 8b 87 b8 00 00 00 mov 0xb8(%rdi),%eax > > > 10: 50 push %rax > > > 11: ff b7 c8 00 00 00 pushq 0xc8(%rdi) > > > 17: 4c 8b 8f c0 00 00 00 mov 0xc0(%rdi),%r9 > > > 1e: 48 c7 c7 18 f1 cf 88 mov $0xffffffff88cff118,%rdi > > > 25: e8 6a 43 fb ff callq 0xfffffffffffb4394 > > > 2a:* 0f 0b ud2 <-- > > > trapping > > > instruction > > > 2c: 48 8b 14 24 mov (%rsp),%rdx > > > 30: 48 c7 c1 20 35 b1 88 mov $0xffffffff88b13520,%rcx > > > 37: e8 ab ff ff ff callq 0xffffffffffffffe7 > > > 3c: 48 rex.W > > > 3d: c7 .byte 0xc7 > > > 3e: c6 (bad) > > > 3f: 60 (bad) > > > > > > Code starting with the faulting instruction > > > =========================================== > > > 0: 0f 0b ud2 > > > 2: 48 8b 14 24 mov (%rsp),%rdx > > > 6: 48 c7 c1 20 35 b1 88 mov $0xffffffff88b13520,%rcx > > > d: e8 ab ff ff ff callq 0xffffffffffffffbd > > > 12: 48 rex.W > > > 13: c7 .byte 0xc7 > > > 14: c6 (bad) > > > 15: 60 (bad) > > > [ 61.422606] RSP: 0018:ffffae258017cce0 EFLAGS: 00010246 > > > [ 61.423865] RAX: 000000000000008b RBX: 0000000000000010 RCX: > > > 00000000ffffdfff > > > [ 61.425031] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: > > > 0000000000000000 > > > [ 61.426229] RBP: ffffde6a80230880 R08: ffffffff88f45568 R09: > > > 0000000000009ffb > > > [ 61.427439] R10: 00000000ffffe000 R11: 3fffffffffffffff R12: > > > ffff8a5ec7461200 > > > [ 61.428615] R13: ffff8a5ec8c22000 R14: 0000000000000000 R15: > > > 0000000000000eb2 > > > [ 61.429799] FS: 0000000000000000(0000) > > > GS:ffff8a5febd40000(0000) > > > knlGS:0000000000000000 > > > > > > Regards, > > > Corentin > > > > Don't see anything obvious.. could be a net stack change. > > Any chance of a bisect? > > > > -- > > MST > >
