Public bug reported:
Issue found on Focal RISCV 5.4.0-27
When running the ubuntu_ftrace_smoke_test test, the following error message
could be found in dmesg:
[ 1491.973122] Unable to handle kernel paging request at virtual address
fffffff888eea090
[ 1491.973278] Unable to handle kernel paging request at virtual address
fffffff888eea090
[ 1491.973346] Unable to handle kernel paging request at virtual address
fffffff888eea090
[ 1491.973421] Unable to handle kernel paging request at virtual address
fffffff888eea090
[ 1491.973485] Unable to handle kernel paging request at virtual address
fffffff888eea090
[ 1491.973545] Unable to handle kernel paging request at virtual address
fffffff888eea090
[ 1491.973865] Oops [#1]
[ 1491.973927] Unable to handle kernel paging request at virtual address
fffffff888eea090
[ 1491.981391] Modules linked in: aufs ofpart redboot cmdlinepart
cfi_cmdset_0001 cfi_probe cfi_util gen_probe physmap map_funcs chipreg mtd
uio_pdrv_genirq uio sch_fq_codel drm drm_panel_orientation_quirks ip_tables
x_tables autofs4 virtio_blk virtio_net net_failover failover
[ 1491.984773] CPU: 3 PID: 25 Comm: migration/3 Not tainted 5.4.0-27-generic
#31-Ubuntu
[ 1491.985795] sepc: ffffffe0000b8c56 ra : ffffffe00015cc12 sp :
ffffffe078035d60
[ 1491.987039] gp : ffffffe000d53840 tp : ffffffe078022280 t0 :
0000000000000000
[ 1491.987967] t1 : fffffffff4e53a0c t2 : 0000000000000018 s0 :
ffffffe078035d70
[ 1491.988996] s1 : ffffffe0719b1bec a0 : 0000000000000000 a1 :
0000000000000000
[ 1491.989877] a2 : ffffffe000d691cc a3 : 0000000000000004 a4 :
0000002ad7faa680
[ 1491.990775] a5 : fffffff888eea088 a6 : 000000037f010229 a7 :
0000000000000000
[ 1491.991635] s2 : 0000000000000003 s3 : ffffffffffffffff s4 :
ffffffe000d54408
[ 1491.992550] s5 : 0000000000000001 s6 : 0000000000000003 s7 :
0000000000000003
[ 1491.993473] s8 : 0000000000000002 s9 : 0000000000000004 s10:
0000000000000000
[ 1491.994437] s11: ffffffe0719b1bc8 t3 : 0000000000000014 t4 :
0000000000000013
[ 1491.995360] t5 : 0000000000000004 t6 : 0000000000000000
[ 1491.996109] sstatus: 0000000000000100 sbadaddr: fffffff888eea090 scause:
000000000000000d
[ 1491.997470] Oops [#2]
[ 1491.997909] Modules linked in: aufs ofpart redboot cmdlinepart
cfi_cmdset_0001 cfi_probe cfi_util gen_probe physmap map_funcs chipreg mtd
uio_pdrv_genirq uio sch_fq_codel drm drm_panel_orientation_quirks ip_tables
x_tables autofs4 virtio_blk virtio_net net_failover failover
[ 1492.000565] CPU: 2 PID: 20 Comm: migration/2 Tainted: G D
5.4.0-27-generic #31-Ubuntu
[ 1492.001501] sepc: ffffffe0000b8c56 ra : ffffffe00015cc12 sp :
ffffffe07802bd60
[ 1492.002287] gp : ffffffe000d53840 tp : ffffffe078027300 t0 :
0000000000000000
[ 1492.003091] t1 : fffffffff47d3a0c t2 : 0000000000000018 s0 :
ffffffe07802bd70
[ 1492.003983] s1 : ffffffe0719b1bec a0 : 0000000000000000 a1 :
0000000000000000
[ 1492.004764] a2 : ffffffe000d691cc a3 : 0000000000000003 a4 :
0000002ad7faa680
[ 1492.005612] a5 : fffffff888eea088 a6 : 000000037f010229 a7 :
0000000000000000
[ 1492.006433] s2 : 0000000000000003 s3 : ffffffffffffffff s4 :
ffffffe000d54408
[ 1492.006746] ---[ end trace 7c8d93ec2f9285a9 ]---
The test will hang:
Running
'/home/ubuntu/autotest/client/tests/ubuntu_ftrace_smoke_test/ubuntu_ftrace_smoke_test.sh'
PASSED (CONFIG_FUNCTION_TRACER=y in /boot/config-5.4.0-27-generic)
PASSED (CONFIG_FUNCTION_GRAPH_TRACER=y in /boot/config-5.4.0-27-generic)
PASSED (CONFIG_STACK_TRACER=y in /boot/config-5.4.0-27-generic)
PASSED (CONFIG_DYNAMIC_FTRACE=y in /boot/config-5.4.0-27-generic)
PASSED all expected /sys/kernel/debug/tracing files exist
PASSED (function_graph in /sys/kernel/debug/tracing/available_tracers)
PASSED (function in /sys/kernel/debug/tracing/available_tracers)
PASSED (nop in /sys/kernel/debug/tracing/available_tracers)
(looks like it has stopped here)
** Affects: ubuntu-kernel-tests
Importance: Undecided
Status: New
** Affects: linux-riscv (Ubuntu)
Importance: Undecided
Status: New
** Tags: 5.4 focal kqa-blocker sru-20200518 ubuntu-ftrace-smoke-test
** Also affects: ubuntu-kernel-tests
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1882028
Title:
Unable to handle kernel paging request at virtual address when running
ubuntu_ftrace_smoke_test
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