rtwn(0) panics with RTL8188CE

Marcus von Appen mva at FreeBSD.org
Mon May 16 09:38:01 UTC 2016

On, Mon May 16, 2016, Marcus von Appen wrote:


this one seems to provide some more information. I have no idea,
if both crash types are related or not.

Unread portion of the kernel message buffer:
rtwn0: can't map mbuf (error 12)
panic: Duplicate free of 0xfffff800c94c1300 from zone 0xfffff800056c4900(mbuf_packet) slab 0xfffff800c94c1f90(3)

cpuid = 1
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe04535f5660
vpanic() at vpanic+0x186/frame 0xfffffe04535f56e0
panic() at panic+0x43/frame 0xfffffe04535f5740
uma_dbg_free() at uma_dbg_free+0xee/frame 0xfffffe04535f5770
uma_zfree_arg() at uma_zfree_arg+0x64/frame 0xfffffe04535f57c0
mb_free_ext() at mb_free_ext+0x155/frame 0xfffffe04535f57f0
m_freem() at m_freem+0x38/frame 0xfffffe04535f5810
rtwn_raw_xmit() at rtwn_raw_xmit+0x7b/frame 0xfffffe04535f5840
ieee80211_send_probereq() at ieee80211_send_probereq+0x514/frame 0xfffffe04535f58e0
ieee80211_swscan_probe_curchan() at ieee80211_swscan_probe_curchan+0x5a/frame 0xfffffe04535f5920
scan_curchan() at scan_curchan+0x68/frame 0xfffffe04535f5960
scan_curchan_task() at scan_curchan_task+0x247/frame 0xfffffe04535f59e0
taskqueue_run_locked() at taskqueue_run_locked+0xf0/frame 0xfffffe04535f5a40
taskqueue_thread_loop() at taskqueue_thread_loop+0x88/frame 0xfffffe04535f5a70
fork_exit() at fork_exit+0x84/frame 0xfffffe04535f5ab0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe04535f5ab0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---

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