Re: Panic after update from stable/15-n280148-c2427a67c7af -> stable/15-n280157-0caba7093871

On Wed, 17 Sep 2025, David Wolfskill wrote:

Cc: adrian as he's into iwn and tx paths... but if you ask me that
smells like an mbuf/memory problem ...  I see you have core files later
in another email so someone should look.

> Fairly standard source-based update (that I've done for years).  I need
> to head to a meeting soon, so I haven't much time just now.  I will try
> to put relevant info up at catwhisker.org, but that won't be for a dfew
> hours, I expect.
>
> The system came up after the reboot long enough for me to login via xdm
> (this was on a laptop) and start copying data from the build to the
> history I keep, but died as it was copying the 3rd file.
>
> Backtrace from vmcore.8:
>
> Fatal trap 12: page fault while in kernel mode
> cpuid = 1; apic id = 01
> fault virtual address   = 0x165210083538
> fault code              = supervisor read data, page not present
> instruction pointer     = 0x20:0xffffffff8068a18e
> stack pointer           = 0x28:0xfffffe108da3e250
> frame pointer           = 0x28:0xfffffe108da3e2c0
> 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         = 12 (irq37: iwn0)
> rdi: fffffe108e8af000 rsi: fffffe108e8af038 rdx: 000000007fc8b700
> rcx: fffff8005e62a600  r8: fffff8005e62a600  r9: fffff8005e62a666
> rax: 00001841817ca800 rbx: fffffe10efc51000 rbp: fffffe108da3e2c0
> r10: 0000000000000085 r11: 000000000000084c r12: fffff8005e62a666
> r13: 0000000000000001 r14: 00001652100804a8 r15: 0000000000000009
> trap number             = 12
> panic: page fault
> cpuid = 1
> time = 1758119492
> KDB: stack backtrace:
> #0 0xffffffff80bb0fad at kdb_backtrace+0x5d
> #1 0xffffffff80b640a6 at vpanic+0x136
> #2 0xffffffff80b63f63 at panic+0x43
> #3 0xffffffff8109fe99 at trap_pfault+0x3c9
> #4 0xffffffff81076378 at calltrap+0x8
> #5 0xffffffff8067f947 at iwn_transmit+0xa7
> #6 0xffffffff80cdb5f3 at ieee80211_parent_xmitpkt+0x13
> #7 0xffffffff80cfe45f at ieee80211_vap_pkt_send_dest+0x17f
> #8 0xffffffff80cff7ff at ieee80211_vap_transmit+0x2cf
> #9 0xffffffff80c95903 at ether_output_frame+0xd3
> #10 0xffffffff80c95700 at ether_output+0x6b0
> #11 0xffffffff80d36641 at ip_output+0x13d1
> #12 0xffffffff80d4fbc1 at tcp_default_output+0x1f21
> #13 0xffffffff80d46ed3 at tcp_output+0x13
> #14 0xffffffff80d4551d at tcp_do_segment+0x1dfd
> #15 0xffffffff80d42d5d at tcp_input_with_port+0xf2d
> #16 0xffffffff80d4370b at tcp_input+0xb
> #17 0xffffffff80d32a39 at ip_input+0x1f9
> Uptime: 1m10s
>
>
> uname:
> FreeBSD 15.0-ALPHA2 #589 stable/15-n280157-0caba7093871: Wed Sep 17 14:21:34 -00 2025     root@localhost:/common/S3/obj/usr/src/amd64.amd64/sys/CANARY amd64 1500064 1500064
>
> Peace,
> david
>

-- 
Bjoern A. Zeeb                                                     r15:7