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Updated to the latest kernel now, will report issues here.

I reverted to the 24.7.8 kernel yesterday.  I have 3 panics from the original 24.7.10 kernel, 2 from pf_find_state() and 1 from pf_detach_state().

My backtrace is slightly different if this helps.

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db:0:kdb.enter.default>  bt
Tracing pid 0 tid 100041 td 0xfffff80103950740
kdb_enter() at kdb_enter+0x33/frame 0xfffffe00d3bf22b0
panic() at panic+0x43/frame 0xfffffe00d3bf2310
trap_fatal() at trap_fatal+0x40b/frame 0xfffffe00d3bf2370
trap_pfault() at trap_pfault+0x46/frame 0xfffffe00d3bf23c0
calltrap() at calltrap+0x8/frame 0xfffffe00d3bf23c0
--- trap 0xc, rip = 0xffffffff8109fa60, rsp = 0xfffffe00d3bf2490, rbp = 0xfffffe00d3bf2490 ---
memcmp() at memcmp+0x110/frame 0xfffffe00d3bf2490
pf_find_state() at pf_find_state+0xc0/frame 0xfffffe00d3bf24e0
pf_test_state_tcp() at pf_test_state_tcp+0x1c4/frame 0xfffffe00d3bf2650
pf_test() at pf_test+0x131e/frame 0xfffffe00d3bf2800
pf_check_in() at pf_check_in+0x27/frame 0xfffffe00d3bf2820
pfil_mbuf_in() at pfil_mbuf_in+0x38/frame 0xfffffe00d3bf2850
ip_tryforward() at ip_tryforward+0x17f/frame 0xfffffe00d3bf2910
ip_input() at ip_input+0x56c/frame 0xfffffe00d3bf2970
netisr_dispatch_src() at netisr_dispatch_src+0x9e/frame 0xfffffe00d3bf29c0
ether_demux() at ether_demux+0x149/frame 0xfffffe00d3bf29f0
ng_ether_rcv_upper() at ng_ether_rcv_upper+0x8c/frame 0xfffffe00d3bf2a10
ng_apply_item() at ng_apply_item+0x13e/frame 0xfffffe00d3bf2ab0
ng_snd_item() at ng_snd_item+0x274/frame 0xfffffe00d3bf2af0
ng_apply_item() at ng_apply_item+0x13e/frame 0xfffffe00d3bf2b90
ng_snd_item() at ng_snd_item+0x274/frame 0xfffffe00d3bf2bd0
ng_ether_input() at ng_ether_input+0x4c/frame 0xfffffe00d3bf2c00
ether_nh_input() at ether_nh_input+0x1dc/frame 0xfffffe00d3bf2c60
netisr_dispatch_src() at netisr_dispatch_src+0x9e/frame 0xfffffe00d3bf2cb0
ether_input() at ether_input+0x56/frame 0xfffffe00d3bf2d00
iflib_rxeof() at iflib_rxeof+0xc0e/frame 0xfffffe00d3bf2e00
_task_fn_rx() at _task_fn_rx+0x72/frame 0xfffffe00d3bf2e40
gtaskqueue_run_locked() at gtaskqueue_run_locked+0x14e/frame 0xfffffe00d3bf2ec0
gtaskqueue_thread_loop() at gtaskqueue_thread_loop+0xc2/frame 0xfffffe00d3bf2ef0
fork_exit() at fork_exit+0x7f/frame 0xfffffe00d3bf2f30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00d3bf2f30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---

This is a Dell VEP 4600.  I'm using the 8 core version.  I believe  that BIOS is the latest, but will double check.  Again, this was working reliably in 24.1 on the same hardware.  I agree that the backtrace doesn't seem incredibly helpful, however.

https://www.delltechnologies.com/asset/en-us/products/networking/technical-support/virtual-edge-platform-4600-spec-sheet.pdf

This was working reliably on 24.1, but since upgrading to 24.7 as soon as a client connects the system panics.

MCA: Bank 6, Status 0xbb80000000000e0b
MCA: Global Cap 0x000000000f000c14, Status 0x0000000000000005
MCA: Vendor "GenuineIntel", ID 0x50654, APIC ID 8
MCA: CPU 8 UNCOR EN PCC S AR generic I/O error (pci0:178:0:0)
MCA: Misc 0xb2000000
panic: Unrecoverable machine check exception
cpuid = 8
time = 1722267831
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00d684dd60
vpanic() at vpanic+0x131/frame 0xfffffe00d684de90
panic() at panic+0x43/frame 0xfffffe00d684def0
mca_intr() at mca_intr+0xbb/frame 0xfffffe00d684df20
mchk_calltrap() at mchk_calltrap+0x8/frame 0xfffffe00d684df20
--- trap 0x1c, rip = 0xffffffff8106501b, rsp = 0xfffffe00d3b4cd70, rbp = 0xfffffe00d3b4cd70 ---
acpi_cpu_idle_mwait() at acpi_cpu_idle_mwait+0x6b/frame 0xfffffe00d3b4cd70
acpi_cpu_idle() at acpi_cpu_idle+0x188/frame 0xfffffe00d3b4cdb0
cpu_idle_acpi() at cpu_idle_acpi+0x46/frame 0xfffffe00d3b4cdd0
cpu_idle() at cpu_idle+0x9d/frame 0xfffffe00d3b4cdf0
sched_idletd() at sched_idletd+0x576/frame 0xfffffe00d3b4cef0
fork_exit() at fork_exit+0x7f/frame 0xfffffe00d3b4cf30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00d3b4cf30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 11 tid 100011 ]
Stopped at      kdb_enter+0x33: movq    $0,0xfd9b22(%rip)
db:0:kdb.enter.default> textdump set
textdump set
db:0:kdb.enter.default>  capture on
db:0:kdb.enter.default>  run lockinfo
db:1:lockinfo> show locks
No such command; use "help" to list available commands
db:1:lockinfo>  show alllocks
No such command; use "help" to list available commands
db:1:lockinfo>  show lockedvnods
Locked vnodes
db:0:kdb.enter.default>  show pcpu
cpuid        = 8
dynamic pcpu = 0xfffffe0154edac40
curthread    = 0xfffff8010398a740: pid 11 tid 100011 critnest 2 "idle: cpu8"
curpcb       = 0xfffff8010398ac60
fpcurthread  = none
idlethread   = 0xfffff8010398a740: tid 100011 "idle: cpu8"
self         = 0xffffffff82e18000
curpmap      = 0xffffffff81b81670
tssp         = 0xffffffff82e18384
rsp0         = 0xfffffe00d3b4d000
kcr3         = 0x800000005dc47002
ucr3         = 0xffffffffffffffff
scr3         = 0x28bdb4ce3
gs32p        = 0xffffffff82e18404
ldt          = 0xffffffff82e18444
tss          = 0xffffffff82e18434
curvnet      = 0
db:0:kdb.enter.default>  bt
Tracing pid 11 tid 100011 td 0xfffff8010398a740
kdb_enter() at kdb_enter+0x33/frame 0xfffffe00d684de90
panic() at panic+0x43/frame 0xfffffe00d684def0
mca_intr() at mca_intr+0xbb/frame 0xfffffe00d684df20
mchk_calltrap() at mchk_calltrap+0x8/frame 0xfffffe00d684df20
--- trap 0x1c, rip = 0xffffffff8106501b, rsp = 0xfffffe00d3b4cd70, rbp = 0xfffffe00d3b4cd70 ---
acpi_cpu_idle_mwait() at acpi_cpu_idle_mwait+0x6b/frame 0xfffffe00d3b4cd70
acpi_cpu_idle() at acpi_cpu_idle+0x188/frame 0xfffffe00d3b4cdb0
cpu_idle_acpi() at cpu_idle_acpi+0x46/frame 0xfffffe00d3b4cdd0
cpu_idle() at cpu_idle+0x9d/frame 0xfffffe00d3b4cdf0
sched_idletd() at sched_idletd+0x576/frame 0xfffffe00d3b4cef0
fork_exit() at fork_exit+0x7f/frame 0xfffffe00d3b4cf30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00d3b4cf30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---