Re: [PATCH 6.8 000/399] 6.8.3-rc1 review

Naresh Kamboju
2024-04-01T19:40:25Z

On Mon, 1 Apr 2024 at 21:20, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 6.8.3 release.
> There are 399 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 03 Apr 2024 15:24:46 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.8.3-rc1.gz
> or in the git tree and branch at:
> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.8.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

The following kernel BUG: unable to handle page fault for address and followed
by Kernel panic - not syncing: Fatal exception in interrupt noticed
on the qemu-i386 running selftests: net: pmtu.sh test case and the kernel
built with kselftest merge net configs with clang.

We are investigating this problem on qemu-i386.

Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>

# selftests: net: pmtu.sh
# TEST: ipv4: PMTU exceptions [ OK ]
# TEST: ipv4: PMTU exceptions - nexthop objects [ OK ]
# TEST: ipv6: PMTU exceptions [ OK ]
<trim>
# TEST: ipv4: cleanup of cached exceptions [ OK ]
# TEST: ipv4: cleanup of cached exceptions - nexthop objects [ OK ]
# TEST: ipv6: cleanup of cached exceptions [ OK ]
# TEST: ipv6: cleanup of cached exceptions - nexthop objects [ OK ]
<1>[ 577.550133] BUG: unable to handle page fault for address: 26c2e000
<1>[ 577.555420] #PF: supervisor read access in kernel mode
<1>[ 577.555881] #PF: error_code(0x0000) - not-present page
<6>[ 577.556265] *pde = 00000000
<4>[ 577.558166] Oops: 0000 [#1] PREEMPT SMP
<4>[ 577.559142] CPU: 1 PID: 59 Comm: kworker/u4:5 Not tainted 6.8.3-rc1 #1
<4>[ 577.560387] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009),
BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
<4>[ 577.561517] Workqueue: netns cleanup_net
<4>[ 577.563500] EIP: percpu_counter_add_batch+0x38/0xc0

<trim>

<4>[ 577.569244] Call Trace:
<4>[ 577.570414] <SOFTIRQ>
<4>[ 577.571182] ? __die_body+0x56/0xa0
<4>[ 577.571635] ? __die+0x6b/0x80
<4>[ 577.571877] ? page_fault_oops+0x296/0x2e0
<4>[ 577.572169] ? kernelmode_fixup_or_oops+0xa0/0xb0
<4>[ 577.572535] ? __bad_area_nosemaphore+0x43/0x180
<4>[ 577.572856] ? bad_area_nosemaphore+0xd/0x20
<4>[ 577.573186] ? do_user_addr_fault+0x314/0x400
<4>[ 577.573524] ? exc_page_fault+0x49/0xa0
<4>[ 577.573807] ? pvclock_clocksource_read_nowd+0xec/0xec
<4>[ 577.574143] ? dst_release+0x60/0x60
<4>[ 577.574408] ? handle_exception+0x14b/0x14b
<4>[ 577.574706] ? dst_release+0x60/0x60
<4>[ 577.574990] ? pvclock_clocksource_read_nowd+0xec/0xec
<4>[ 577.575340] ? percpu_counter_add_batch+0x38/0xc0
<4>[ 577.575664] ? pvclock_clocksource_read_nowd+0xec/0xec
<4>[ 577.576005] ? percpu_counter_add_batch+0x38/0xc0
<4>[ 577.576333] ? dst_release+0x60/0x60
<4>[ 577.576594] dst_destroy+0x34/0xe0
<4>[ 577.577017] dst_destroy_rcu+0xb/0x10
<4>[ 577.577298] rcu_core+0x3f5/0x920
<4>[ 577.577561] rcu_core_si+0x8/0x10
<4>[ 577.577803] __do_softirq+0xa8/0x23e
<4>[ 577.578088] ? __lock_text_end+0x3/0x3
<4>[ 577.578353] do_softirq_own_stack+0x50/0x60
<4>[ 577.578744] </SOFTIRQ>
<4>[ 577.578974] ? sysvec_call_function_single+0x2c/0x2c
<4>[ 577.579313] irq_exit_rcu+0x3a/0x80
<4>[ 577.579574] sysvec_apic_timer_interrupt+0x1f/0x30
<4>[ 577.579893] handle_exception+0x14b/0x14b
<4>[ 577.580315] EIP: rb_erase+0x1aa/0x270

<trim>

<4>[ 577.581832] ? sysvec_call_function_single+0x2c/0x2c
<4>[ 577.582101] ? sysvec_call_function_single+0x2c/0x2c
<4>[ 577.582361] ? rb_erase+0x1aa/0x270
<4>[ 577.582631] remove_proc_entry+0xce/0x1a0
<4>[ 577.582959] tcp4_proc_exit_net+0x10/0x20
<4>[ 577.583251] cleanup_net+0x1fb/0x350
<4>[ 577.583515] process_scheduled_works+0x1e1/0x3a0
<4>[ 577.583837] worker_thread+0x294/0x3c0
<4>[ 577.584112] kthread+0x13a/0x150
<4>[ 577.584348] ? pr_cont_work+0x180/0x180
<4>[ 577.584624] ? kthread_blkcg+0x30/0x30
<4>[ 577.584892] ? kthread_blkcg+0x30/0x30
<4>[ 577.585175] ret_from_fork+0x2b/0x40
<4>[ 577.585433] ret_from_fork_asm+0x12/0x18
<4>[ 577.585734] entry_INT80_32+0x108/0x108
<4>[ 577.586133] Modules linked in: xfrm_user ipip bridge stp llc
geneve vxlan act_csum act_pedit cls_flower sch_prio xt_mark nft_compat
nf_tables libcrc32c sch_ingress act_mirred cls_basic sch_fq_codel vrf
macvtap macvlan tap ip_tables x_tables [last unloaded:
test_blackhole_dev]
<4>[ 577.588292] CR2: 0000000026c2e000
<4>[ 577.589067] ---[ end trace 0000000000000000 ]---
<4>[ 577.589465] EIP: percpu_counter_add_batch+0x38/0xc0

<trim>

<0>[ 577.592536] Kernel panic - not syncing: Fatal exception in interrupt
<0>[ 577.598118] Kernel Offset: disabled
<0>[ 577.598605] ---[ end Kernel panic - not syncing: Fatal exception
in interrupt ]---

Steps to reproduce:
-----
- https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2eVRrC1WkGHyPnNFg2O7ZvT2Vgy/reproducer

Links:
- https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.8.y/build/v6.8.2-400-gbffeaccf18b5/testrun/23255383/suite/log-parser-test/test/check-kernel-bug/log
- https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.8.y/build/v6.8.2-400-gbffeaccf18b5/testrun/23255383/suite/log-parser-test/tests/
- https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2eVRrC1WkGHyPnNFg2O7ZvT2Vgy

--
Linaro LKFT