Hi,
a wrong config surfaced a potential issue in the cleanup path of ACPI,
at least according to my current understanding. Use x86_64_defconfig,
add CONFIG_SLAB_FREELIST_HARDENED=y and disable CONFIG_PCI, then boot in
QEMU (likely also real HW) to get this:
...
[ 0.041398] ACPI: Added _OSI(Module Device)
[ 0.041978] ACPI: Added _OSI(Processor Device)
[ 0.042342] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 0.043060] ACPI: Added _OSI(Processor Aggregator Device)
[ 0.043337] ACPI: Added _OSI(Linux-Dell-Video)
[ 0.044095] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[ 0.044341] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)
[ 0.045020] ACPI Error: AE_BAD_PARAMETER, During Region initialization (20210105/tbxfload-53)
[ 0.045340] ACPI: Unable to load the System Description Tables
[ 0.046076] ACPI Error: Could not remove SCI handler (20210105/evmisc-251)
[ 0.046367] ------------[ cut here ]------------
[ 0.047004] cache_from_obj: Wrong slab cache. ftrace_event_field but object is from kmalloc-64
[ 0.047340] WARNING: CPU: 0 PID: 1 at ../mm/slab.h:456 kmem_cache_free+0x1c8/0x280
[ 0.048319] Modules linked in:
[ 0.048335] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.12.0-rc2+ #7
[ 0.049174] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba527-rebuilt.opensuse.org 04/01/2014
[ 0.049336] RIP: 0010:kmem_cache_free+0x1c8/0x280
[ 0.050041] Code: 28 48 01 d8 48 85 db 0f 85 2d ff ff ff 0f 0b 48 8b 57 60 48 8b 4d 60 48 c7 c6 f0 5b c1 af 48 c7 c7 50 5c da af e8 c8 36 e8 ff <0f> 0b 48 89 de 48 89 ef e8 8b be ff ff 48 8b 0d 7c 9e e4 00 e9 a6
[ 0.050336] RSP: 0000:ffffb12e80017d90 EFLAGS: 00010282
[ 0.051135] RAX: 0000000000000000 RBX: ffff89570104f340 RCX: 00000000ffffdfff
[ 0.051335] RDX: ffffb12e80017bb0 RSI: 00000000ffffdfff RDI: 0000000000000003
[ 0.052304] RBP: ffff895701042500 R08: 0000000000000000 R09: 0000000000000001
[ 0.052335] R10: 0000000000000001 R11: ffffb12e80017ba8 R12: ffffffffafdcb739
[ 0.053201] R13: ffff89570104f380 R14: ffff89578104f340 R15: 0000000000000000
[ 0.053335] FS: 0000000000000000(0000) GS:ffff89573ec00000(0000) knlGS:0000000000000000
[ 0.054337] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.055342] CR2: 0000000000000000 CR3: 000000001780c001 CR4: 0000000000370ef0
[ 0.056345] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 0.057291] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 0.057337] Call Trace:
[ 0.057743] ? rdinit_setup+0x26/0x26
[ 0.058268] acpi_os_release_object+0x5/0x10
[ 0.058335] acpi_ns_delete_children+0x4b/0x60
[ 0.059168] acpi_ns_delete_namespace_subtree+0x5c/0x79
[ 0.059336] ? acpi_sleep_proc_init+0x1f/0x1f
[ 0.059987] acpi_ns_terminate+0xc/0x31
[ 0.060335] acpi_ut_subsystem_shutdown+0x45/0xa1
[ 0.061060] ? acpi_sleep_proc_init+0x1f/0x1f
[ 0.061335] acpi_terminate+0x5/0xf
[ 0.062160] acpi_init+0x3f7/0x482
[ 0.062337] ? video_setup+0x79/0x79
[ 0.062958] ? acpi_sleep_proc_init+0x1f/0x1f
[ 0.063335] do_one_initcall+0x3f/0x1c0
[ 0.063876] kernel_init_freeable+0x1bb/0x1f9
[ 0.064335] ? rest_init+0xb0/0xb0
[ 0.064833] kernel_init+0x5/0x110
[ 0.065329] ret_from_fork+0x22/0x30
[ 0.065338] ---[ end trace 8bfe26bf6796f23c ]---
[ 0.066028] ------------[ cut here ]------------
and many more of those. This was with current Linus head and also
v5.10.23.
Jan
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Corporate Competence Center Embedded Linux