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Also, any tips on whether the issue is likely with my Linux version or QEMU ? I can share more details if required but just wanted to know if this looks obvious to expert eyes. > Hi Mohan, It would be better if you can share your qemu and kernel setup details so people who can help look into to it can reproduce your issue and analyze. Fan > Regards, > Mohan > > > > [ 57.988032] ------------[ cut here ]------------ > [ 57.990637] memcpy: detected buffer overflow: 96 byte write of buffer size 0 > [ 57.994123] WARNING: CPU: 0 PID: 46 at lib/string_helpers.c:1032 __fortify_report+0x55/0xa0 > [ 58.001055] Modules linked in: cxl_pci i2c_i801(+) irqbypass vfat pcspkr fat i2c_smbus mctp_i2c(+) parport_pc(+) cxl_acpi i2c_mux parport cxl_port cxl_core e1000e einj lpc_ich bochs loop nfnetlink vsock_loopback vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport vsock zram vmw_vmci qemu_fw_cfg serio_raw scsi_dh_rdac scsi_dh_emc scsi_dh_alua i2c_dev fuse > [ 58.016135] CPU: 0 UID: 0 PID: 46 Comm: kworker/u16:2 Not tainted 6.15.0-rc4-mohan+ #4 PREEMPT(voluntary) > [ 58.021711] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 > [ 58.025755] Workqueue: async async_run_entry_fn > [ 58.029028] RIP: 0010:__fortify_report+0x55/0xa0 > [ 58.032915] Code: 01 48 8b 34 c5 20 1f 73 b9 48 c7 c1 06 58 f2 b9 48 c7 c0 fc 57 f2 b9 48 0f 44 c8 4c 89 ca 48 c7 c7 d8 ef e3 b9 e8 bb 2e 80 ff <0f> 0b 48 83 c4 20 c3 cc cc cc cc 48 89 74 24 10 48 89 c6 89 7c 24 > [ 58.039451] RSP: 0018:ffffd248801a3a38 EFLAGS: 00010246 > [ 58.047157] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000027 > [ 58.053599] RDX: ffff88abbbc1ca88 RSI: 0000000000000001 RDI: ffff88abbbc1ca80 > [ 58.059967] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffd248801a38d8 > [ 58.064773] R10: ffffffffba939ac8 R11: 00000000ffffdfff R12: 0000000000000000 > [ 58.075635] R13: 0000000000000000 R14: ffff88ab4007c800 R15: 0000000000000002 > [ 58.084667] FS: 0000000000000000(0000) GS:ffff88ac0052b000(0000) knlGS:0000000000000000 > [ 58.096028] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 58.106050] CR2: 00007fbd45b4b058 CR3: 0000000115109000 CR4: 00000000000006f0 > [ 58.117482] Call Trace: > [ 58.121907] > [ 58.129551] ? cxl_internal_send_cmd+0x3c/0xf0 [cxl_core] > [ 58.139570] __fortify_panic+0xd/0xf > [ 58.146273] devm_cxl_setup_features.cold+0x43/0x43 [cxl_core] > [ 58.153161] cxl_pci_probe+0x431/0xa90 [cxl_pci] > [ 58.158287] ? kernfs_xattr_get+0x3b/0x70 > [ 58.161167] ? selinux_kernfs_init_security+0x74/0x250 > [ 58.167922] ? try_to_wake_up+0x7f/0x760 > [ 58.170137] local_pci_probe+0x42/0x90 > [ 58.172399] pci_device_probe+0xda/0x2b0 > [ 58.177444] ? sysfs_do_create_link_sd+0x6d/0xd0 > [ 58.182205] really_probe+0xde/0x340 > [ 58.190234] ? pm_runtime_barrier+0x55/0x90 > [ 58.192903] __driver_probe_device+0x78/0x140 > [ 58.197956] driver_probe_device+0x1f/0xa0 > [ 58.203673] __driver_attach_async_helper+0x5e/0xe0 > [ 58.208474] async_run_entry_fn+0x34/0x130 > [ 58.217941] process_one_work+0x18e/0x350 > [ 58.221932] worker_thread+0x25a/0x3a0 > [ 58.223804] ? __pfx_worker_thread+0x10/0x10 > [ 58.229040] kthread+0xfc/0x240 > [ 58.237142] ? __pfx_kthread+0x10/0x10 > [ 58.246321] ret_from_fork+0x34/0x50 > [ 58.253927] ? __pfx_kthread+0x10/0x10 > [ 58.261905] ret_from_fork_asm+0x1a/0x30 > [ 58.267821] > [ 58.269775] ---[ end trace 0000000000000000 ]--- > [ 58.274065] ------------[ cut here ]------------ > [ 58.282586] kernel BUG at lib/string_helpers.c:1040! > [ 58.293976] Oops: invalid opcode: 0000 [#1] SMP NOPTI > [ 58.299430] audit: type=1130 audit(1746252020.305:32): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=systemd-random-seed comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' > [ 58.299474] CPU: 0 UID: 0 PID: 46 Comm: kworker/u16:2 Tainted: G W 6.15.0-rc4-mohan+ #4 PREEMPT(voluntary) > [ 58.313086] Tainted: [W]=WARN > [ 58.317049] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 > [ 58.322714] Workqueue: async async_run_entry_fn > [ 58.329051] RIP: 0010:__fortify_panic+0xd/0xf > [ 58.332500] Code: e9 dc d9 95 00 e9 02 da 95 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 40 0f b6 ff e8 d3 f2 95 00 <0f> 0b 48 8b 54 24 10 48 8b 74 24 08 4c 89 e1 48 c7 c7 90 2e ef b9 > [ 58.339956] RSP: 0018:ffffd248801a3a60 EFLAGS: 00010282 > [ 58.348114] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000027 > [ 58.356607] RDX: ffff88abbbc1ca88 RSI: 0000000000000001 RDI: ffff88abbbc1ca80 > [ 58.360981] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffd248801a38d8 > [ 58.366267] R10: ffffffffba939ac8 R11: 00000000ffffdfff R12: 0000000000000000 > [ 58.369804] R13: 0000000000000000 R14: ffff88ab4007c800 R15: 0000000000000002 > [ 58.376177] FS: 0000000000000000(0000) GS:ffff88ac0052b000(0000) knlGS:0000000000000000 > [ 58.380150] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 58.384364] CR2: 00007fbd45b4b058 CR3: 0000000115109000 CR4: 00000000000006f0 > [ 58.387660] Call Trace: > [ 58.390086] > [ 58.392804] devm_cxl_setup_features.cold+0x43/0x43 [cxl_core] > [ 58.395791] cxl_pci_probe+0x431/0xa90 [cxl_pci] > [ 58.409127] ? kernfs_xattr_get+0x3b/0x70 > [ 58.415392] ? selinux_kernfs_init_security+0x74/0x250 > [ 58.420775] ? try_to_wake_up+0x7f/0x760 > [ 58.423879] local_pci_probe+0x42/0x90 > [ 58.429026] pci_device_probe+0xda/0x2b0 > [ 58.433175] ? sysfs_do_create_link_sd+0x6d/0xd0 > [ 58.438630] really_probe+0xde/0x340 > [ 58.440769] ? pm_runtime_barrier+0x55/0x90 > [ 58.442846] __driver_probe_device+0x78/0x140 > [ 58.445598] driver_probe_device+0x1f/0xa0 > [ 58.448532] __driver_attach_async_helper+0x5e/0xe0 > [ 58.451848] async_run_entry_fn+0x34/0x130 > [ 58.456739] process_one_work+0x18e/0x350 > [ 58.462118] worker_thread+0x25a/0x3a0 > [ 58.467050] ? __pfx_worker_thread+0x10/0x10 > [ 58.470596] kthread+0xfc/0x240 > [ 58.474475] ? __pfx_kthread+0x10/0x10 > [ 58.477836] ret_from_fork+0x34/0x50 > [ 58.480791] ? __pfx_kthread+0x10/0x10 > [ 58.484168] ret_from_fork_asm+0x1a/0x30 > [ 58.487363] > [ 58.490697] Modules linked in: cxl_pci i2c_i801 irqbypass vfat pcspkr fat i2c_smbus mctp_i2c parport_pc(+) cxl_acpi i2c_mux parport cxl_port cxl_core e1000e einj lpc_ich bochs loop nfnetlink vsock_loopback vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport vsock zram vmw_vmci qemu_fw_cfg serio_raw scsi_dh_rdac scsi_dh_emc scsi_dh_alua i2c_dev fuse > [ 58.505259] ---[ end trace 0000000000000000 ]--- > [ 58.509396] RIP: 0010:__fortify_panic+0xd/0xf > [ 58.512731] Code: e9 dc d9 95 00 e9 02 da 95 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 40 0f b6 ff e8 d3 f2 95 00 <0f> 0b 48 8b 54 24 10 48 8b 74 24 08 4c 89 e1 48 c7 c7 90 2e ef b9 > [ 58.520925] RSP: 0018:ffffd248801a3a60 EFLAGS: 00010282 > [ 58.524495] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000027 > [ 58.528365] RDX: ffff88abbbc1ca88 RSI: 0000000000000001 RDI: ffff88abbbc1ca80 > [ 58.532956] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffd248801a38d8 > [ 58.536365] R10: ffffffffba939ac8 R11: 00000000ffffdfff R12: 0000000000000000 > [ 58.540179] R13: 0000000000000000 R14: ffff88ab4007c800 R15: 0000000000000002 > [ 58.546765] FS: 0000000000000000(0000) GS:ffff88ac0052b000(0000) knlGS:0000000000000000 > [ 58.550843] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 58.554470] CR2: 00007fbd45b4b058 CR3: 0000000115109000 CR4: 00000000000006f0 > [ 59.773090] iTCO_vendor_support: vendor-support=0 -- Fan Ni