kern/59337: Kernel panic while running ATF suite on -current

[rares.aioanei%gmail.com@localhost]

>Number:         59337
>Category:       kern
>Synopsis:       Kernel panic while running ATF suite on -current
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Apr 21 09:00:02 +0000 2025
>Originator:     Rares Aioanei
>Release:        10.99.14 (updated today, 21st of April)
>Organization:
>Environment:
NetBSD netbsdvmcurr.localdom.ain 10.99.14 NetBSD 10.99.14 (GENERIC) #0: Sat Apr 19 14:25:11 UTC 2025  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64

>Description:
While running ATF tests and updating my pkgsrc tree at the same time, the machine rebooted. Afterwards, I found this in /var/log/messages : 

Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5157224] panic: kernel diagnostic assertion "!(l->l_md.md_flags & MDL_FPU_IN_CPU)" failed: file "/usr/src/sys/arch/x86/x86/fpu.c", line 149 
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5157224] cpu2: Begin traceback...
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5157224] vpanic() at netbsd:vpanic+0x171
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5157224] kern_assert() at netbsd:kern_assert+0x4b
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5257809] process_read_fpregs_xmm() at netbsd:process_read_fpregs_xmm+0x122
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5257809] process_read_fpregs() at netbsd:process_read_fpregs+0x9
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5257809] proc_regio() at netbsd:proc_regio+0x69
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5257809] do_ptrace() at netbsd:do_ptrace+0xc4f
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5257809] sys_ptrace() at netbsd:sys_ptrace+0x2b
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5257809] syscall() at netbsd:syscall+0x9d
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5257809] --- syscall (number 26) ---
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5257809] netbsd:syscall+0x9d:
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5257809] cpu2: End traceback...
Apr 21 11:43:30 netbsdvmcurr /netbsd: 
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5257809] dumping to dev 0,1 (offset=1039, size=2097022):
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9762.5358317] dump Skipping crash dump on recursive panic
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5716764] panic: atastart: channel 0 busy, xfer not possible
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5716764] cpu2: Begin traceback...
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5716764] vpanic() at netbsd:vpanic+0x171
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5716764] panic() at netbsd:panic+0x3c
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5716764] atastart() at netbsd:atastart+0x5c5
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5817350] wd_dumpblocks() at netbsd:wd_dumpblocks+0xfe
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5817350] dk_dump() at netbsd:dk_dump+0x15f
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5817350] dump_header_flush() at netbsd:dump_header_flush+0x5d
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5817350] dump_header_addbytes() at netbsd:dump_header_addbytes+0x40
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5817350] dump_header_addseg() at netbsd:dump_header_addseg+0x29
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5817350] dump_seg_iter() at netbsd:dump_seg_iter+0xe6
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5817350] cpu_dump() at netbsd:cpu_dump+0x76
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5817350] dodumpsys() at netbsd:dodumpsys+0x100
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5917905] dumpsys() at netbsd:dumpsys+0x1d
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5917905] kern_reboot() at netbsd:kern_reboot+0x93
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5917905] vpanic() at netbsd:vpanic+0x17b
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5917905] kern_assert() at netbsd:kern_assert+0x4b
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5917905] process_read_fpregs_xmm() at netbsd:process_read_fpregs_xmm+0x122
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5917905] process_read_fpregs() at netbsd:process_read_fpregs+0x9
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.5917905] proc_regio() at netbsd:proc_regio+0x69
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.6018477] do_ptrace() at netbsd:do_ptrace+0xc4f
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.6018477] sys_ptrace() at netbsd:sys_ptrace+0x2b
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.6018477] syscall() at netbsd:syscall+0x9d
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.6018477] --- syscall (number 26) ---
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.6018477] netbsd:syscall+0x9d:
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.6018477] cpu2: End traceback...
Apr 21 11:43:30 netbsdvmcurr /netbsd: [ 9763.6018477] rebooting...

>How-To-Repeat:
Run ATF tests 
>Fix: