We have triaged the issue and mentioned the upstream commit that should
fixes the issue in the bug description.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1827330
Title:
[block layer] please pull below upstream patch to Ubuntu 19.04 kernel
Status in linux package in Ubuntu:
Confirmed
Bug description:
Doing a lip on lpfc crashes the Ubuntu 19.04 kernel
#echo 1> /sys/class/fc_host/host<>/issue_lip
Kernel version:
Linux version 5.0.0-7-generic (buildd@lcy01-amd64-020) (gcc version 8.3.0
(Ubuntu 8.3.0-2ubuntu1))
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.338980] BUG: unable to
handle kernel NULL pointer dereference at 00000000000000b8
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.344517] #PF error: [normal
kernel read fault]
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.344523] PGD 0 P4D 0
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.351436] device-mapper:
multipath: Failing path 129:64.
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352960] RIP:
0010:blk_mq_dispatch_rq_list+0xc8/0x4f0
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352962] Code: 45 84 ed 0f
85 21 02 00 00 49 8b 06 83 45 ac 01 49 39 c6 0f 84 2e 02 00 00 4d 8b 3e 80 7d
b0 00 4d 8d 67 b8 49 8b 5f c8 75 26 <48> 8b 83 b8 00 00 00 48 8b 40 40 48 8b 40
10 48 85 c0 74 12 48 89
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352963] RSP:
0018:ffffb8c6c7d37d88 EFLAGS: 00010246
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352965] RAX:
ffff9da508c85848 RBX: 0000000000000000 RCX: 000000000000000a
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352966] RDX:
0000000000000000 RSI: ffffb8c6c7d37e10 RDI: ffff9da50321c848
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352967] RBP:
ffffb8c6c7d37e00 R08: 0000000000000000 R09: 00646b636f6c626b
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352968] R10:
8080808080808080 R11: 000000ddf2c6455b R12: ffff9da508c85800
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352969] R13:
0000000000000000 R14: ffffb8c6c7d37e10 R15: ffff9da508c85848
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352971] FS:
0000000000000000(0000) GS:ffff9da51fdc0000(0000) knlGS:0000000000000000
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352972] CS: 0010 DS: 0000
ES: 0000 CR0: 0000000080050033
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352973] CR2:
00000000000000b8 CR3: 00000007a8c0e002 CR4: 00000000007606e0
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352974] DR0:
0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352975] DR3:
0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.352976] PKRU: 55555554
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.353566] Oops: 0000 [#19]
SMP PTI
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.403374] CPU: 2 PID: 27111
Comm: kworker/2:2H Tainted: G D 5.0.0-7-generic #8-Ubuntu
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.404046] Hardware name: Dell
Inc. PowerEdge R740/07WCGN, BIOS 1.5.6 10/17/2018
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.404861] Workqueue: kblockd
blk_mq_run_work_fn
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.405740] RIP:
0010:blk_mq_dispatch_rq_list+0xc8/0x4f0
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.406428] Code: 45 84 ed 0f
85 21 02 00 00 49 8b 06 83 45 ac 01 49 39 c6 0f 84 2e 02 00 00 4d 8b 3e 80 7d
b0 00 4d 8d 67 b8 49 8b 5f c8 75 26 <48> 8b 83 b8 00 00 00 48 8b 40 40 48 8b 40
10 48 85 c0 74 12 48 89
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.407860] RSP:
0018:ffffb8c6ca4dfd88 EFLAGS: 00010246
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.408624] RAX:
ffff9da509360b48 RBX: 0000000000000000 RCX: 000000000000000a
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.409492] RDX:
0000000000000000 RSI: ffffb8c6ca4dfe10 RDI: ffff9da50cc71010
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.410234] RBP:
ffffb8c6ca4dfe00 R08: 0000000000000000 R09: 00646b636f6c626b
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.410980] R10:
8080808080808080 R11: 0000000000001000 R12: ffff9da509360b00
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.411730] R13:
0000000000000000 R14: ffffb8c6ca4dfe10 R15: ffff9da509360b48
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.412493] FS:
0000000000000000(0000) GS:ffff9da51fa40000(0000) knlGS:0000000000000000
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.413283] CS: 0010 DS: 0000
ES: 0000 CR0: 0000000080050033
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.414045] CR2:
00000000000000b8 CR3: 00000007a8c0e006 CR4: 00000000007606e0
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.414814] DR0:
0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.415586] DR3:
0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.416366] PKRU: 55555554
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.417100] Call Trace:
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.417818] ?
blk_mq_flush_busy_ctxs+0xf7/0x110
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.418522]
blk_mq_sched_dispatch_requests+0x153/0x170
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.419211]
__blk_mq_run_hw_queue+0x57/0xe0
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.419969]
blk_mq_run_work_fn+0x1b/0x20
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.420642]
process_one_work+0x20f/0x410
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.421421]
worker_thread+0x34/0x400
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.422043] kthread+0x120/0x140
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.422653] ?
process_one_work+0x410/0x410
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.423262] ?
__kthread_parkme+0x70/0x70
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.423859]
ret_from_fork+0x35/0x40
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.424522] Modules linked in:
xt_tcpudp ip6table_filter ip6_tables iptable_filter bpfilter nls_iso8859_1
dm_service_time dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua intel_rapl
skx_edac nfit x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel dcdbas
kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel intel_cstate
intel_rapl_perf ipmi_ssif input_leds joydev mei_me mei ipmi_si ipmi_devintf
ipmi_msghandler acpi_power_meter mac_hid sch_fq_codel ib_iser rdma_cm iw_cm
ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables
x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0
multipath linear ses enclosure scsi_transport_sas uas usb_storage hid_generic
usbhid hid mgag200 i2c_algo_bit lpfc ttm drm_kms_helper syscopyarea nvmet_fc
aesni_intel sysfillrect nvmet sysimgblt nvme_fc nvme_fabrics fb_sys_fops
aes_x86_64 crypto_simd cryptd nvme_core glue_helper drm
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.424562] scsi_transport_fc
ahci megaraid_sas lpc_ich tg3 libahci
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.430783] CR2:
00000000000000b8
Apr 8 12:10:38 dhcp-10-123-163-25 kernel: [ 8673.431477] ---[ end trace
2d2128512982fd5b ]---
Below patch should fix this issue:
---------------------------------
From fd9c40f64c514bdc585a21e2e33fa5f83ca8811b Mon Sep 17 00:00:00 2001
From: Bart Van Assche <[email protected]>
Date: Thu, 4 Apr 2019 10:08:43 -0700
Subject: [PATCH] block: Revert v5.0 blk_mq_request_issue_directly() changes
blk_mq_try_issue_directly() can return BLK_STS*_RESOURCE for requests that
have been queued. If that happens when blk_mq_try_issue_directly() is called
by the dm-mpath driver then dm-mpath will try to resubmit a request that is
already queued and a kernel crash follows. Since it is nontrivial to fix
blk_mq_request_issue_directly(), revert the blk_mq_request_issue_directly()
changes that went into kernel v5.0.
This patch reverts the following commits:
* d6a51a97c0b2 ("blk-mq: replace and kill blk_mq_request_issue_directly") #
v5.0.
* 5b7a6f128aad ("blk-mq: issue directly with bypass 'false' in
blk_mq_sched_insert_requests") # v5.0.
* 7f556a44e61d ("blk-mq: refactor the code of issue request directly") # v5.0.
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