[Bug 280546] Panic on network startup with iwlwifi

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 01 Aug 2024 02:07:23 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280546

            Bug ID: 280546
           Summary: Panic on network startup with iwlwifi
           Product: Base System
           Version: 15.0-CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: wireless
          Assignee: wireless@FreeBSD.org
          Reporter: rkoberman@gmail.com

Created attachment 252415
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=252415&action=edit
core.txt from panic

System is a T16-Gen1 with the Alder Lake wifi. When starting the network, it
panics with:
Fatal trap 12: page fault while in kernel mode
cpuid = 5; apic id = 12
fault virtual address   = 0xc
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff8359afd3
stack pointer           = 0x28:0xfffffe00f1341c80
frame pointer           = 0x28:0xfffffe00f1341d00
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 0 (linuxkpi_short_wq_1)
rdi: fffffe016695c4f8 rsi: fffffe00f1341c48 rdx: ffffffff8118971b
rcx: 0000000000000000  r8: 0000000000000001  r9: ffffffffffffffff
rax: 0000000000000000 rbx: fffffe0167886e80 rbp: fffffe00f1341d00
r10: 0000000000010000 r11: 0000000000000001 r12: fffffe0167887478
r13: 0000000000000000 r14: fffffe016695c4c8 r15: fffff80003bec540

core.txt is attached. The backtrace shows the following items:
iwl_mvm_bt_notif_iterator() at iwl_mvm_bt_notif_iterator+0xf3/frame
0xfffffe00f1341d00
linuxkpi_ieee80211_iterate_interfaces() at
linuxkpi_ieee80211_iterate_interfaces+0x84/frame 0xfffffe00f1341d40
iwl_mvm_bt_coex_notif_handle() at iwl_mvm_bt_coex_notif_handle+0x7c/frame
0xfffffe00f1341da0
iwl_mvm_async_handlers_wk() at iwl_mvm_async_handlers_wk+0x110/frame
0xfffffe00f1341df0

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