Re: [PATCH for-rc v3 0/6] RDMA/rxe: Various bug fixes.

[Bart Van Assche <bvanassche@acm.org>]

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On 9/9/21 1:44 PM, Bob Pearson wrote:
> This series of patches implements several bug fixes and minor
> cleanups of the rxe driver. Specifically these fix a bug exposed
> by blktest.
> 
> They apply cleanly to both
> commit 2169b908894df2ce83e7eb4a399d3224b2635126 (origin/for-rc, for-rc)
> commit 6a217437f9f5482a3f6f2dc5fcd27cf0f62409ac (HEAD -> for-next,
> 	origin/wip/jgg-for-next, origin/for-next, origin/HEAD)
> 
> These are being resubmitted to for-rc instead of for-next.

Hi Bob,

Thanks for having rebased and reposted this patch series. I have applied
this series on top of commit 2169b908894d ("IB/hfi1: make hist static").
A kernel bug was triggered while running test srp/001. I have attached
the kernel configuration used in my test to this email.

Thanks,

Bart.



ib_srpt Received SRP_LOGIN_REQ with i_port_id fe80:0000:0000:0000:5054:00ff:fe86:7464, t_port_id 5054:00ff:fe86:7464:5054:00ff:fe86:7464 and it_iu_len 8260 on port 1 (guid=fe80:0000:0000:0000:5054:00ff:fe86:7464); pkey 0xffff
BUG: unable to handle page fault for address: ffffc900e357d614
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 100000067 P4D 100000067 PUD 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 26 PID: 148 Comm: ksoftirqd/26 Tainted: G            E     5.14.0-rc6-dbg+ #2
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:rxe_completer+0x96d/0x1050 [rdma_rxe]
Code: e0 49 8b 44 24 08 44 89 e9 41 d3 e6 4e 8d a4 30 80 01 00 00 4d 85 e4 0f 84 f9 00 00 00 49 8d bc 24 94 00 00 00 e8 73 a8 b1 e0 <41> 8b 84 24 94 00 00 00 85 c0 0f 84 df 00 00 00 83 f8 03 0f 84 bf
RSP: 0018:ffff8881014075f8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88813c67c000 RCX: dffffc0000000000
RDX: 0000000000000007 RSI: ffffffff826920c0 RDI: ffffc900e357d614
RBP: ffff8881014076e8 R08: ffffffffa09b228d R09: ffff88813c67c57b
R10: ffffed10278cf8af R11: 0000000000000000 R12: ffffc900e357d580
R13: 000000000000000a R14: 00000000d9c99400 R15: ffff8881515ddd08
FS:  0000000000000000(0000) GS:ffff88842d100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc900e357d614 CR3: 0000000002e29005 CR4: 0000000000770ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
  rxe_do_task+0xdd/0x160 [rdma_rxe]
  rxe_run_task+0x67/0x80 [rdma_rxe]
  rxe_comp_queue_pkt+0x75/0x80 [rdma_rxe]
  rxe_rcv+0x345/0x480 [rdma_rxe]
  rxe_xmit_packet+0x1af/0x300 [rdma_rxe]
  send_ack.isra.0+0x88/0xd0 [rdma_rxe]
  rxe_responder+0xf4c/0x15e0 [rdma_rxe]
  rxe_do_task+0xdd/0x160 [rdma_rxe]
  rxe_run_task+0x67/0x80 [rdma_rxe]
  rxe_resp_queue_pkt+0x5a/0x60 [rdma_rxe]
  rxe_rcv+0x370/0x480 [rdma_rxe]
  rxe_xmit_packet+0x1af/0x300 [rdma_rxe]
  rxe_requester+0x4f4/0xe80 [rdma_rxe]
  rxe_do_task+0xdd/0x160 [rdma_rxe]
  tasklet_action_common.constprop.0+0x168/0x1b0
  tasklet_action+0x44/0x60
  __do_softirq+0x1db/0x6ed
  run_ksoftirqd+0x37/0x60
  smpboot_thread_fn+0x302/0x410
  kthread+0x1f6/0x220
  ret_from_fork+0x1f/0x30
Modules linked in: ib_srp(E) scsi_transport_srp(E) target_core_user(E) uio(E) target_core_pscsi(E) target_core_file(E) ib_srpt(E) target_core_iblock(E) target_core_mod(E) ib_umad(E) rdma_ucm(E) ib_iser(E) libiscsi(E) scsi_transport_iscsi(E) rdma_cm(E) iw_cm(E) 
scsi_debug(E) ib_cm(E) rdma_rxe(E) ip6_udp_tunnel(E) udp_tunnel(E) ib_uverbs(E) null_blk(E) ib_core(E) brd(E) af_packet(E) nft_fib_inet(E) nft_fib_ipv4(E) nft_fib_ipv6(E) nft_fib(E) nft_reject_inet(E) nf_reject_ipv4(E) nf_reject_ipv6(E) nft_reject(E) nft_ct(E) 
nft_chain_nat(E) nf_tables(E) ebtable_nat(E) iTCO_wdt(E) watchdog(E) ebtable_broute(E) intel_rapl_msr(E) intel_pmc_bxt(E) ip6table_nat(E) ip6table_mangle(E) ip6table_raw(E) iptable_nat(E) nf_nat(E) nf_conntrack(E) nf_defrag_ipv6(E) nf_defrag_ipv4(E) libcrc32c(E) 
iptable_mangle(E) iptable_raw(E) ip_set(E) nfnetlink(E) ebtable_filter(E) ebtables(E) ip6table_filter(E) ip6_tables(E) rfkill(E) iptable_filter(E) ip_tables(E) x_tables(E) bpfilter(E) intel_rapl_common(E)
  iosf_mbi(E) isst_if_common(E) i2c_i801(E) pcspkr(E) i2c_smbus(E) virtio_net(E) lpc_ich(E) virtio_balloon(E) net_failover(E) failover(E) tiny_power_button(E) button(E) fuse(E) crct10dif_pclmul(E) crc32_pclmul(E) crc32c_intel(E) ghash_clmulni_intel(E) aesni_intel(E) 
crypto_simd(E) cryptd(E) sr_mod(E) serio_raw(E) cdrom(E) virtio_gpu(E) virtio_dma_buf(E) drm_kms_helper(E) syscopyarea(E) sysfillrect(E) sysimgblt(E) fb_sys_fops(E) cec(E) drm(E) qemu_fw_cfg(E) sg(E) nbd(E) dm_multipath(E) dm_mod(E) scsi_dh_rdac(E) scsi_dh_emc(E) 
scsi_dh_alua(E) virtio_rng(E)
CR2: ffffc900e357d614
---[ end trace 0667a278da47193a ]---
RIP: 0010:rxe_completer+0x96d/0x1050 [rdma_rxe]
Code: e0 49 8b 44 24 08 44 89 e9 41 d3 e6 4e 8d a4 30 80 01 00 00 4d 85 e4 0f 84 f9 00 00 00 49 8d bc 24 94 00 00 00 e8 73 a8 b1 e0 <41> 8b 84 24 94 00 00 00 85 c0 0f 84 df 00 00 00 83 f8 03 0f 84 bf
RSP: 0018:ffff8881014075f8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88813c67c000 RCX: dffffc0000000000
RDX: 0000000000000007 RSI: ffffffff826920c0 RDI: ffffc900e357d614
RBP: ffff8881014076e8 R08: ffffffffa09b228d R09: ffff88813c67c57b
R10: ffffed10278cf8af R11: 0000000000000000 R12: ffffc900e357d580
R13: 000000000000000a R14: 00000000d9c99400 R15: ffff8881515ddd08
FS:  0000000000000000(0000) GS:ffff88842d100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc900e357d614 CR3: 0000000002e29005 CR4: 0000000000770ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Kernel panic - not syncing: Fatal exception in interrupt
Kernel Offset: disabled
Rebooting in 90 seconds..

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