lkml.org 
[lkml]   [2019]   [Aug]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: 5.3-rc3-ish VM crash: RIP: 0010:tcp_trim_head+0x20/0xe0
From
Date


On 8/12/19 2:50 PM, Sander Eikelenboom wrote:
> L.S.,
>
> While testing a somewhere-after-5.3-rc3 kernel (which included the latest net merge (33920f1ec5bf47c5c0a1d2113989bdd9dfb3fae9),
> one of my Xen VM's (which gets quite some network load) crashed.
> See below for the stacktrace.
>
> Unfortunately I haven't got a clear trigger, so bisection doesn't seem to be an option at the moment.
> I haven't encountered this on 5.2, so it seems to be an regression against 5.2.
>
> Any ideas ?
>
> --
> Sander
>
>
> [16930.653595] general protection fault: 0000 [#1] SMP NOPTI
> [16930.653624] CPU: 0 PID: 3275 Comm: rsync Not tainted 5.3.0-rc3-20190809-doflr+ #1
> [16930.653657] RIP: 0010:tcp_trim_head+0x20/0xe0
> [16930.653677] Code: 2e 0f 1f 84 00 00 00 00 00 90 41 54 41 89 d4 55 48 89 fd 53 48 89 f3 f6 46 7e 01 74 2f 8b 86 bc 00 00 00 48 03 86 c0 00 00 00 <8b> 40 20 66 83 f8 01 74 19 31 d2 31 f6 b9 20 0a 00 00 48 89 df e8
> [16930.653741] RSP: 0000:ffffc90000003ad8 EFLAGS: 00010286
> [16930.653762] RAX: fffe888005bf62c0 RBX: ffff8880115fb800 RCX: 000000008010000b

crash in " mov 0x20(%rax),%eax" and RAX=fffe888005bf62c0 (not a valid kernel address)

Look like one bit corruption maybe.

Nothing comes to mind really between 5.2 and 53 that could explain this.

> [16930.653791] RDX: 00000000000005a0 RSI: ffff8880115fb800 RDI: ffff888016b00880
> [16930.653819] RBP: ffff888016b00880 R08: 0000000000000001 R09: 0000000000000000
> [16930.653848] R10: ffff88800ae00800 R11: 00000000bfe632e6 R12: 00000000000005a0
> [16930.653875] R13: 0000000000000001 R14: 00000000bfe62d46 R15: 0000000000000004
> [16930.653913] FS: 00007fe71fe2cb80(0000) GS:ffff88801f200000(0000) knlGS:0000000000000000
> [16930.653943] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [16930.653965] CR2: 000055de0f3e7000 CR3: 0000000011f32000 CR4: 00000000000006f0
> [16930.653993] Call Trace:
> [16930.654005] <IRQ>
> [16930.654018] tcp_ack+0xbb0/0x1230
> [16930.654033] tcp_rcv_established+0x2e8/0x630
> [16930.654053] tcp_v4_do_rcv+0x129/0x1d0
> [16930.654070] tcp_v4_rcv+0xac9/0xcb0
> [16930.654088] ip_protocol_deliver_rcu+0x27/0x1b0
> [16930.654109] ip_local_deliver_finish+0x3f/0x50
> [16930.654128] ip_local_deliver+0x4d/0xe0
> [16930.654145] ? ip_protocol_deliver_rcu+0x1b0/0x1b0
> [16930.654163] ip_rcv+0x4c/0xd0
> [16930.654179] __netif_receive_skb_one_core+0x79/0x90
> [16930.654200] netif_receive_skb_internal+0x2a/0xa0
> [16930.654219] napi_gro_receive+0xe7/0x140
> [16930.654237] xennet_poll+0x9be/0xae0
> [16930.654254] net_rx_action+0x136/0x340
> [16930.654271] __do_softirq+0xdd/0x2cf
> [16930.654287] irq_exit+0x7a/0xa0
> [16930.654304] xen_evtchn_do_upcall+0x27/0x40
> [16930.654320] xen_hvm_callback_vector+0xf/0x20
> [16930.654339] </IRQ>
> [16930.654349] RIP: 0033:0x55de0d87db99
> [16930.654364] Code: 00 00 48 89 7c 24 f8 45 39 fe 45 0f 42 fe 44 89 7c 24 f4 eb 09 0f 1f 40 00 83 e9 01 74 3e 89 f2 48 63 f8 4c 01 d2 44 38 1c 3a <75> 25 44 38 6c 3a ff 75 1e 41 0f b6 3c 24 40 38 3a 75 14 41 0f b6
> [16930.654432] RSP: 002b:00007ffd5531eec8 EFLAGS: 00000a87 ORIG_RAX: ffffffffffffff0c
> [16930.655004] RAX: 0000000000000002 RBX: 000055de0f3e8e50 RCX: 000000000000007f
> [16930.655034] RDX: 000055de0f3dc2d2 RSI: 0000000000003492 RDI: 0000000000000002
> [16930.655062] RBP: 0000000000007fff R08: 00000000000080ea R09: 00000000000001f0
> [16930.655089] R10: 000055de0f3d8e40 R11: 0000000000000094 R12: 000055de0f3e0f2a
> [16930.655116] R13: 0000000000000010 R14: 0000000000007f16 R15: 0000000000000080
> [16930.655144] Modules linked in:
> [16930.655200] ---[ end trace 533367c95501b645 ]---
> [16930.655223] RIP: 0010:tcp_trim_head+0x20/0xe0
> [16930.655243] Code: 2e 0f 1f 84 00 00 00 00 00 90 41 54 41 89 d4 55 48 89 fd 53 48 89 f3 f6 46 7e 01 74 2f 8b 86 bc 00 00 00 48 03 86 c0 00 00 00 <8b> 40 20 66 83 f8 01 74 19 31 d2 31 f6 b9 20 0a 00 00 48 89 df e8
> [16930.655312] RSP: 0000:ffffc90000003ad8 EFLAGS: 00010286
> [16930.655331] RAX: fffe888005bf62c0 RBX: ffff8880115fb800 RCX: 000000008010000b
> [16930.655360] RDX: 00000000000005a0 RSI: ffff8880115fb800 RDI: ffff888016b00880
> [16930.655387] RBP: ffff888016b00880 R08: 0000000000000001 R09: 0000000000000000
> [16930.655414] R10: ffff88800ae00800 R11: 00000000bfe632e6 R12: 00000000000005a0
> [16930.655441] R13: 0000000000000001 R14: 00000000bfe62d46 R15: 0000000000000004
> [16930.655475] FS: 00007fe71fe2cb80(0000) GS:ffff88801f200000(0000) knlGS:0000000000000000
> [16930.655502] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [16930.655525] CR2: 000055de0f3e7000 CR3: 0000000011f32000 CR4: 00000000000006f0
> [16930.655553] Kernel panic - not syncing: Fatal exception in interrupt
> [16930.655789] Kernel Offset: disabled
>

\
 
 \ /
  Last update: 2019-08-12 20:02    [W:0.069 / U:0.988 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site