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Message-ID:
<BN8PR15MB251311AA63AE08F9E868B0F89967A@BN8PR15MB2513.namprd15.prod.outlook.com>
Date: Wed, 28 May 2025 16:52:24 +0000
From: Bernard Metzler <BMT@...ich.ibm.com>
To: Vlastimil Babka <vbabka@...e.cz>,
kernel test robot
<oliver.sang@...el.com>,
"David S. Miller" <davem@...emloft.net>,
Eric
Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni
<pabeni@...hat.com>, Jason Gunthorpe <jgg@...pe.ca>,
Leon Romanovsky
<leon@...nel.org>
CC: "oe-lkp@...ts.linux.dev" <oe-lkp@...ts.linux.dev>,
"lkp@...el.com"
<lkp@...el.com>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
Matthew Wilcox
<willy@...radead.org>, Simon Horman <horms@...nel.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>
Subject: RE: [linux-next:master] [mm, slab] 6431f06eec:
WARNING:at_include/linux/mm.h:#skb_append_pagefrags
> -----Original Message-----
> From: Vlastimil Babka <vbabka@...e.cz>
> Sent: Wednesday, May 28, 2025 11:46 AM
> To: kernel test robot <oliver.sang@...el.com>; David S. Miller
> <davem@...emloft.net>; Eric Dumazet <edumazet@...gle.com>; Jakub Kicinski
> <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>; Bernard Metzler
> <BMT@...ich.ibm.com>; Jason Gunthorpe <jgg@...pe.ca>; Leon Romanovsky
> <leon@...nel.org>
> Cc: oe-lkp@...ts.linux.dev; lkp@...el.com; linux-mm@...ck.org; Matthew
> Wilcox <willy@...radead.org>; Simon Horman <horms@...nel.org>;
> netdev@...r.kernel.org; linux-rdma@...r.kernel.org
> Subject: [EXTERNAL] Re: [linux-next:master] [mm, slab] 6431f06eec:
> WARNING:at_include/linux/mm.h:#skb_append_pagefrags
>
> On 5/22/25 06:54, kernel test robot wrote:
> >
> >
> > Hello,
> >
> >
> > we noticed the WARN added in this commit is hit in our tests. not sure if
> it's
> > expected. below full report FYI.
>
> It's expected in the sense that if somebody is doing the wrong thing, there
> would be a report. So it seems that has now happened :)
>
> > kernel test robot noticed
> "WARNING:at_include/linux/mm.h:#skb_append_pagefrags" on:
> >
> > commit: 6431f06eecf44e7b8d42237cb0e166a456f491ad ("mm, slab: warn when
> increasing refcount on large kmalloc page")
> > https%
> 3A__git.kernel.org_cgit_linux_kernel_git_next_linux-
> 2Dnext.git&d=DwIFaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4tYSbqxy
> OwdSiLedP4yO55g&m=RVwvTs1_4tv9VS6aBY_BN1Nb5XX4P80N9RLHq1UND_lRCm9uja6lYFlrt
> 1eIP6xD&s=gDBCZ9iGPTCbRHLz-aCIQx6RpCDBnybfljVjh1G_MjQ&e= master
>
> FYI that's
> https%
> 3A__git.kernel.org_pub_scm_linux_kernel_git_vbabka_slab.git_commit_-3Fh-
> 3Dslab_for-2D6.16_testing-26id-
> 3D6431f06eecf44e7b8d42237cb0e166a456f491ad&d=DwIFaQ&c=BSDicqBQBDjDI9RkVyTcH
> Q&r=4ynb4Sj_4MUcZXbhvovE4tYSbqxyOwdSiLedP4yO55g&m=RVwvTs1_4tv9VS6aBY_BN1Nb5
> XX4P80N9RLHq1UND_lRCm9uja6lYFlrt1eIP6xD&s=HgoQP2p-
> qH0YF0Pxt2hT1lLJjQI4CaEArKRz-4OZCUA&e=
>
> so we have skb_splice_from_iter() calling skb_append_pagefrags() and that
> does a get_page(). But this warning means one of the pages is a kmalloc()
> with size >8kb that is using the page allocator and not slab caches. But
> that 8kb threshold is an implementation detail, so we want all kmalloc()
> allocated buffers to behave the same and use frozen pages and thus not
> allow
> get_page().
>
> Note skb_splice_from_iter() has above the call to skb_append_pagefrags():
>
> if (WARN_ON_ONCE(!sendpage_ok(page)))
> goto out;
>
> and sendpage_ok() is:
>
> return !PageSlab(page) && page_count(page) >= 1;
>
> Thus if we went ahead with frozen pages for large kmalloc(), sendpage_ok()
> would start marking them as not ok, which seems like the right thing. But
> this callsite would still produce a WARN_ON_ONCE(), so that suggests it's
> not really expected to for kmalloc() pages to reach this code.
>
> It's possible that some other code using sendpage_ok() elsewhere prevents
> this from happening, and this WARN_ON_ONCE() is just a safety double check.
> Or not, and something (siw?) needs to be fixed to e.g. stop using kmalloc()
siw ckecks every page before sending via sendpage_ok(). It unsets
MSG_SPLICE_PAGES flag for the current message if one page to be
handed to tcp_sendmsg_locked() fails that test. Wouldn't that
be sufficient?
Thanks,
Bernard.
> and use the page allocator directly. I don't know this code so I'm just
> ccing networking and siw maintainers. Thanks in advance.
>
> Vlastimil
>
> >
> > [test failed on linux-next/master
> 7bac2c97af4078d7a627500c9bcdd5b033f97718]
> >
> > in testcase: blktests
> > version: blktests-x86_64-613b837-1_20250520
> > with following parameters:
> >
> > disk: 1SSD
> > test: nvme-group-00
> > nvme_trtype: rdma
> > use_siw: true
> >
> >
> >
> > config: x86_64-rhel-9.4-func
> > compiler: gcc-12
> > test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz (Skylake)
> with 16G memory
> >
> > (please refer to attached dmesg/kmsg for entire log/backtrace)
> >
> >
> >
> > If you fix the issue in a separate patch/commit (i.e. not just a new
> version of
> > the same patch/commit), kindly add following tags
> > | Reported-by: kernel test robot <oliver.sang@...el.com>
> > | Closes: https%
> 3A__lore.kernel.org_oe-2Dlkp_202505221248.595a9117-2Dlkp-
> 40intel.com&d=DwIFaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4tYSbqx
> yOwdSiLedP4yO55g&m=RVwvTs1_4tv9VS6aBY_BN1Nb5XX4P80N9RLHq1UND_lRCm9uja6lYFlr
> t1eIP6xD&s=DPDmeNRUMUu0ZG0SDNI9LtFWXdtU6aTDbKw4Jlc6V9k&e=
> >
> >
> > [ 130.177740][ T2674] ------------[ cut here ]------------
> > [ 130.183066][ T2674] WARNING: CPU: 6 PID: 2674 at
> include/linux/mm.h:1552 skb_append_pagefrags (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/include/linux/mm.h:1552 kbuild/obj/consumer/x86_64-rhel-9.4-
> func/net/core/skbuff.c:4518)
> > [ 130.192642][ T2674] Modules linked in: siw ib_uverbs nvmet_rdma nvmet
> nvme_rdma nvme_fabrics rdma_cm nvme_auth nvme_core iw_cm ib_cm ib_core xfs
> dm_multipath btrfs blake2b_generic xor zstd_compress raid6_pq
> intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp
> snd_soc_avs snd_hda_codec_hdmi coretemp snd_soc_hda_codec snd_hda_ext_core
> sd_mod snd_ctl_led snd_soc_core sg snd_hda_codec_realtek kvm_intel
> snd_hda_codec_generic snd_compress ipmi_devintf snd_hda_scodec_component
> ipmi_msghandler i915 kvm snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi
> intel_gtt snd_hda_codec cec irqbypass ghash_clmulni_intel drm_buddy
> snd_hda_core sha512_ssse3 ttm snd_hwdep sha256_ssse3 drm_display_helper
> sha1_ssse3 snd_pcm ahci mei_wdt drm_client_lib drm_kms_helper rapl libahci
> mei_me snd_timer intel_cstate video wmi_bmof i2c_i801 snd intel_uncore mei
> pcspkr soundcore i2c_smbus libata serio_raw intel_pmc_core
> intel_pch_thermal intel_vsec pmt_telemetry wmi acpi_pad pmt_class
> binfmt_misc drm fuse loop dm_mod ip_tables
> > [ 130.192875][ T2674] [last unloaded: ib_uverbs]
> > [ 130.286562][ T2674] CPU: 6 UID: 0 PID: 2674 Comm: siw_tx/6 Tainted: G
> S 6.15.0-rc3-00001-g6431f06eecf4 #1 PREEMPT(voluntary)
> > [ 130.299313][ T2674] Tainted: [S]=CPU_OUT_OF_SPEC
> > [ 130.303929][ T2674] Hardware name: HP HP Z240 SFF Workstation/802E,
> BIOS N51 Ver. 01.63 10/05/2017
> > [ 130.312877][ T2674] RIP: 0010:skb_append_pagefrags
> (kbuild/obj/consumer/x86_64-rhel-9.4-func/include/linux/mm.h:1552
> kbuild/obj/consumer/x86_64-rhel-9.4-func/net/core/skbuff.c:4518)
> > [ 130.318708][ T2674] Code: a2 ff ff 48 8b 4c 24 18 4c 8b 4c 24 10 8b 54
> 24 08 4c 8b 14 24 e9 1b fb ff ff 4c 8d 60 ff e9 47 fb ff ff 0f 0b e9 bb fb
> ff ff <0f> 0b e9 7b fb ff ff b8 a6 ff ff ff e9 d7 fc ff ff 0f 0b 31 ff e9
> > All code
> > ========
> > 0: a2 ff ff 48 8b 4c 24 movabs %al,0x4c18244c8b48ffff
> > 7: 18 4c
> > 9: 8b 4c 24 10 mov 0x10(%rsp),%ecx
> > d: 8b 54 24 08 mov 0x8(%rsp),%edx
> > 11: 4c 8b 14 24 mov (%rsp),%r10
> > 15: e9 1b fb ff ff jmp 0xfffffffffffffb35
> > 1a: 4c 8d 60 ff lea -0x1(%rax),%r12
> > 1e: e9 47 fb ff ff jmp 0xfffffffffffffb6a
> > 23: 0f 0b ud2
> > 25: e9 bb fb ff ff jmp 0xfffffffffffffbe5
> > 2a:* 0f 0b ud2 <-- trapping instruction
> > 2c: e9 7b fb ff ff jmp 0xfffffffffffffbac
> > 31: b8 a6 ff ff ff mov $0xffffffa6,%eax
> > 36: e9 d7 fc ff ff jmp 0xfffffffffffffd12
> > 3b: 0f 0b ud2
> > 3d: 31 ff xor %edi,%edi
> > 3f: e9 .byte 0xe9
> >
> > Code starting with the faulting instruction
> > ===========================================
> > 0: 0f 0b ud2
> > 2: e9 7b fb ff ff jmp 0xfffffffffffffb82
> > 7: b8 a6 ff ff ff mov $0xffffffa6,%eax
> > c: e9 d7 fc ff ff jmp 0xfffffffffffffce8
> > 11: 0f 0b ud2
> > 13: 31 ff xor %edi,%edi
> > 15: e9 .byte 0xe9
> > [ 130.338106][ T2674] RSP: 0018:ffffc90000ec7220 EFLAGS: 00010246
> > [ 130.344005][ T2674] RAX: 00000000000000f8 RBX: ffffea00086b0000 RCX:
> ffff8883ffd08840
> > [ 130.351795][ T2674] RDX: 0000000000000001 RSI: 1ffffd40010d6006 RDI:
> ffffea00086b0030
> > [ 130.359609][ T2674] RBP: ffff8883ffd08780 R08: 0000000000000011 R09:
> ffff8883ffd08848
> > [ 130.367426][ T2674] R10: 0000000000000001 R11: 0000000000000001 R12:
> ffffea00086b0000
> > [ 130.375247][ T2674] R13: 0000000000000001 R14: 0000000000001000 R15:
> 0000000000000000
> > [ 130.383044][ T2674] FS: 0000000000000000(0000)
> GS:ffff888426d45000(0000) knlGS:0000000000000000
> > [ 130.391798][ T2674] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > [ 130.398234][ T2674] CR2: 000055b575c2cd28 CR3: 000000043c06e004 CR4:
> 00000000003726f0
> > [ 130.406050][ T2674] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> > [ 130.413861][ T2674] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
> 0000000000000400
> > [ 130.421668][ T2674] Call Trace:
> > [ 130.424805][ T2674] <TASK>
> > [ 130.427594][ T2674] ? __pfx_tcp_established_options
> (kbuild/obj/consumer/x86_64-rhel-9.4-func/net/ipv4/tcp_output.c:989)
> > [ 130.433409][ T2674] skb_splice_from_iter (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/net/core/skbuff.c:7256)
> > [ 130.438455][ T2674] ? __pfx_skb_splice_from_iter
> (kbuild/obj/consumer/x86_64-rhel-9.4-func/net/core/skbuff.c:7223)
> > [ 130.444015][ T2674] ? __sk_mem_raise_allocated
> (kbuild/obj/consumer/x86_64-rhel-9.4-func/net/core/sock.c:3335)
> > [ 130.449674][ T2674] ? __sk_mem_schedule (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/net/core/sock.c:3353)
> > [ 130.454470][ T2674] tcp_sendmsg_locked (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/net/ipv4/tcp.c:1275)
> > [ 130.459521][ T2674] ? tcp_sendmsg (kbuild/obj/consumer/x86_64-rhel-9.4-
> func/net/ipv4/tcp.c:1370)
> > [ 130.463786][ T2674] ? sock_sendmsg (kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/net/socket.c:712 kbuild/obj/consumer/x86_64-rhel-9.4-
> func/net/socket.c:727 kbuild/obj/consumer/x86_64-rhel-9.4-
> func/net/socket.c:750)
> > [ 130.468307][ T2674] ? __pfx_tcp_sendmsg_locked
> (kbuild/obj/consumer/x86_64-rhel-9.4-func/net/ipv4/tcp.c:1061)
> > [ 130.473697][ T2674] ? __pfx_sock_sendmsg (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/net/socket.c:739)
> > [ 130.478561][ T2674] ? _raw_spin_lock_bh (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/arch/x86/include/asm/atomic.h:107 kbuild/obj/consumer/x86_64-
> rhel-9.4-func/include/linux/atomic/atomic-arch-fallback.h:2170
> kbuild/obj/consumer/x86_64-rhel-9.4-func/include/linux/atomic/atomic-
> instrumented.h:1302 kbuild/obj/consumer/x86_64-rhel-9.4-func/include/asm-
> generic/qspinlock.h:111 kbuild/obj/consumer/x86_64-rhel-9.4-
> func/include/linux/spinlock.h:187 kbuild/obj/consumer/x86_64-rhel-9.4-
> func/include/linux/spinlock_api_smp.h:127 kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/kernel/locking/spinlock.c:178)
> > [ 130.483350][ T2674] ? __pfx_tcp_release_cb (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/net/ipv4/tcp_output.c:1151)
> > [ 130.488394][ T2674] siw_tcp_sendpages+0x1f1/0x4f0 siw
> > [ 130.494322][ T2674] ? __pfx_siw_tcp_sendpages+0x10/0x10 siw
> > [ 130.500763][ T2674] siw_tx_hdt (kbuild/obj/consumer/x86_64-rhel-9.4-
> func/drivers/infiniband/sw/siw/siw_qp_tx.c:379 kbuild/obj/consumer/x86_64-
> rhel-9.4-func/drivers/infiniband/sw/siw/siw_qp_tx.c:586) siw
> > [ 130.505558][ T2674] ? __pfx_sched_balance_find_src_group
> (kbuild/obj/consumer/x86_64-rhel-9.4-func/kernel/sched/fair.c:11298)
> > [ 130.511811][ T2674] ? __pfx_siw_tx_hdt (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/drivers/infiniband/sw/siw/siw_qp_tx.c:431) siw
> > [ 130.517045][ T2674] ? sched_balance_rq (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/kernel/sched/fair.c:11770)
> > [ 130.521998][ T2674] ? dl_scaled_delta_exec (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/kernel/sched/deadline.c:1481)
> > [ 130.527133][ T2674] ? place_entity (kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/kernel/sched/fair.c:5206)
> > [ 130.531567][ T2674] ? __pfx__raw_spin_lock (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/kernel/locking/spinlock.c:153)
> > [ 130.536606][ T2674] ? pick_eevdf (kbuild/obj/consumer/x86_64-rhel-9.4-
> func/kernel/sched/fair.c:946)
> > [ 130.540970][ T2674] ? __resched_curr (kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/arch/x86/include/asm/bitops.h:60 kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/include/asm-generic/bitops/instrumented-atomic.h:29
> kbuild/obj/consumer/x86_64-rhel-9.4-func/include/linux/thread_info.h:97
> kbuild/obj/consumer/x86_64-rhel-9.4-func/kernel/sched/core.c:1113)
> > [ 130.545678][ T2674] ? update_curr (kbuild/obj/consumer/x86_64-rhel-9.4-
> func/kernel/sched/fair.c:1236)
> > [ 130.550031][ T2674] ? xas_load (kbuild/obj/consumer/x86_64-rhel-9.4-
> func/include/linux/xarray.h:175 kbuild/obj/consumer/x86_64-rhel-9.4-
> func/include/linux/xarray.h:1264 kbuild/obj/consumer/x86_64-rhel-9.4-
> func/lib/xarray.c:241)
> > [ 130.554136][ T2674] ? xa_load (kbuild/obj/consumer/x86_64-rhel-9.4-
> func/lib/xarray.c:1613)
> > [ 130.558136][ T2674] ? __pfx_xa_load (kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/lib/xarray.c:1613)
> > [ 130.562569][ T2674] ? ttwu_do_activate (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/kernel/sched/core.c:3705 kbuild/obj/consumer/x86_64-rhel-9.4-
> func/kernel/sched/core.c:3735)
> > [ 130.567431][ T2674] ? update_rq_clock_task (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/kernel/sched/sched.h:1325 kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/kernel/sched/pelt.h:120 kbuild/obj/consumer/x86_64-rhel-9.4-
> func/kernel/sched/core.c:797)
> > [ 130.572650][ T2674] ? siw_mem_id2obj (kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/drivers/infiniband/sw/siw/siw_mem.c:52) siw
> > [ 130.577866][ T2674] ? __pfx_siw_try_1seg (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/drivers/infiniband/sw/siw/siw_qp_tx.c:50) siw
> > [ 130.583264][ T2674] ? __pfx_try_to_wake_up (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/kernel/sched/core.c:4175)
> > [ 130.588310][ T2674] ? finish_task_switch+0x155/0x750
> > [ 130.593957][ T2674] siw_qp_sq_proc_tx (kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/drivers/infiniband/sw/siw/siw_qp_tx.c:882) siw
> > [ 130.599352][ T2674] ? siw_activate_tx (kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/drivers/infiniband/sw/siw/siw_qp.c:996) siw
> > [ 130.604670][ T2674] siw_qp_sq_process (kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/drivers/infiniband/sw/siw/siw_qp_tx.c:1038) siw
> > [ 130.609905][ T2674] siw_sq_resume (kbuild/obj/consumer/x86_64-rhel-9.4-
> func/drivers/infiniband/sw/siw/siw_qp_tx.c:1170) siw
> > [ 130.614789][ T2674] siw_run_sq (kbuild/obj/consumer/x86_64-rhel-9.4-
> func/drivers/infiniband/sw/siw/siw_qp_tx.c:1258) siw
> > [ 130.619508][ T2674] ? __pfx_siw_run_sq (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/drivers/infiniband/sw/siw/siw_qp_tx.c:1236) siw
> > [ 130.624735][ T2674] ? __pfx__raw_spin_lock_irqsave
> (kbuild/obj/consumer/x86_64-rhel-9.4-func/kernel/locking/spinlock.c:161)
> > [ 130.630482][ T2674] ? __pfx_autoremove_wake_function
> (kbuild/obj/consumer/x86_64-rhel-9.4-func/kernel/sched/wait.c:383)
> > [ 130.636383][ T2674] ? __kthread_parkme (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/arch/x86/include/asm/bitops.h:206 (discriminator 15)
> kbuild/obj/consumer/x86_64-rhel-9.4-func/arch/x86/include/asm/bitops.h:238
> (discriminator 15) kbuild/obj/consumer/x86_64-rhel-9.4-func/include/asm-
> generic/bitops/instrumented-non-atomic.h:142 (discriminator 15)
> kbuild/obj/consumer/x86_64-rhel-9.4-func/kernel/kthread.c:291
> (discriminator 15))
> > [ 130.641160][ T2674] ? __pfx_siw_run_sq (kbuild/obj/consumer/x86_64-
> rhel-9.4-func/drivers/infiniband/sw/siw/siw_qp_tx.c:1236) siw
> > [ 130.646377][ T2674] kthread (kbuild/obj/consumer/x86_64-rhel-9.4-
> func/kernel/kthread.c:464)
> > [ 130.650291][ T2674] ? __pfx_kthread (kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/kernel/kthread.c:413)
> > [ 130.654724][ T2674] ? __pfx__raw_spin_lock_irq
> (kbuild/obj/consumer/x86_64-rhel-9.4-func/kernel/locking/spinlock.c:169)
> > [ 130.660098][ T2674] ? __pfx_kthread (kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/kernel/kthread.c:413)
> > [ 130.664534][ T2674] ret_from_fork (kbuild/obj/consumer/x86_64-rhel-9.4-
> func/arch/x86/kernel/process.c:159)
> > [ 130.668809][ T2674] ? __pfx_kthread (kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/kernel/kthread.c:413)
> > [ 130.673247][ T2674] ret_from_fork_asm (kbuild/obj/consumer/x86_64-rhel-
> 9.4-func/arch/x86/entry/entry_64.S:258)
> > [ 130.677869][ T2674] </TASK>
> > [ 130.680755][ T2674] ---[ end trace 0000000000000000 ]---
> >
> >
> >
> > The kernel config and materials to reproduce are available at:
> > https%
> 3A__download.01.org_0day-2Dci_archive_20250522_202505221248.595a9117-2Dlkp-
> 40intel.com&d=DwIFaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4tYSbqx
> yOwdSiLedP4yO55g&m=RVwvTs1_4tv9VS6aBY_BN1Nb5XX4P80N9RLHq1UND_lRCm9uja6lYFlr
> t1eIP6xD&s=0zFCWDVF-T2ahG-ugOYYBxHQfJHaj8ndY77_YbCzPNY&e=
> >
> >
> >
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