Re: kernel trap 12 .. cam_periph_release_locked_buses() panics under panic?
Date: Mon, 11 Sep 2023 14:26:23 UTC
On Mon, 11 Sep 2023, Warner Losh wrote: > That's a crazy traceback. We get a fatal trap and then call into the wifi > stack? That makes no sense in the absence of some crazy data corruption or > a weird traceback issue. No, we panic in wifi and then iterated again and again. The first one is the lkpi_sta_auth_to_scan() panic. > On Mon, Sep 11, 2023, 7:47 AM Bjoern A. Zeeb <bzeeb-lists@lists.zabbadoz.net> > wrote: > >> Hi, >> >> had a kernel hitting an alll-to-known wifi issue and panic (I was actually >> happy I could reproduce) and then the screen kept scrolling for a while >> panicing all over again and ddb was unusable (not so happy). >> >> I assume the problem is cam_periph_release_locked_buses()? >> > > Unlikely given the rest of the traceback.... > > Can you get a core so we can look at it more deeply? No, after <n> iterations. ddb gave up and stopped and power cycle was the only thing I could still do. >> /bz >> >> ... >> --- trap 0x80bc1f07, rip = 0xffffffff80381e83, rsp = 0x3d7bb6db69f8, rbp = >> 0xfffffe00907fa4a0 --- >> cam_periph_release_locked_buses() at >> cam_periph_release_locked_buses+0x43/frame 0xfffffe00907fa4a0 >> kernel trap 12 with interrupts disabled >> >> >> Fatal trap 12: page fault while in kernel mode >> cpuid = 2; apic id = 02 >> fault virtual address = 0xfffffe00907fa4a8 >> fault code = supervisor read data, page not present >> instruction pointer = 0x20:0xffffffff8101f660 >> stack pointer = 0x0:0xfffffe00907f8f90 >> frame pointer = 0x0:0xfffffe00907f9020 >> code segment = base 0x0, limit 0xfffff, type 0x1b >> = DPL 0, pres 1, long 1, def32 0, gran 1 >> processor eflags = resume, IOPL = 0 >> current process = 0 (iwlwifi0 net80211 t) >> rdi: fffffe00907f8f90 rsi: 0000000000000008 rdx: fffffe00907fa4a8 >> rcx: fffffe00907f9030 r8: 0000000000000000 r9: 0000000000000000 >> rax: 0000000000000000 rbx: fffffe00907f90f0 rbp: fffffe00907f9020 >> r10: 0000000000000000 r11: 0000000000000000 r12: fffffe00907fa4a8 >> r13: 0000000000000008 r14: 0000000000000000 r15: fffffe00907f9030 >> trap number = 12 >> panic: page fault >> cpuid = 2 >> time = 1694439681 >> KDB: stack backtrace: >> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame >> 0xfffffe00907f8c60 >> vpanic() at vpanic+0x132/frame 0xfffffe00907f8d90 >> panic() at panic+0x43/frame 0xfffffe00907f8df0 >> trap_fatal() at trap_fatal+0x40c/frame 0xfffffe00907f8e50 >> trap_pfault() at trap_pfault+0xae/frame 0xfffffe00907f8ec0 >> calltrap() at calltrap+0x8/frame 0xfffffe00907f8ec0 >> --- trap 0xc, rip = 0xffffffff8101f660, rsp = 0xfffffe00907f8f90, rbp = >> 0xfffffe00907f9020 --- >> db_read_bytes() at db_read_bytes+0xa0/frame 0xfffffe00907f9020 >> db_get_value() at db_get_value+0x31/frame 0xfffffe00907f9060 >> db_backtrace() at db_backtrace+0x1d9/frame 0xfffffe00907f90e0 >> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame >> 0xfffffe00907f9160 >> vpanic() at vpanic+0x132/frame 0xfffffe00907f9290 >> panic() at panic+0x43/frame 0xfffffe00907f92f0 >> trap_fatal() at trap_fatal+0x40c/frame 0xfffffe00907f9350 >> trap_pfault() at trap_pfault+0xae/frame 0xfffffe00907f93c0 >> calltrap() at calltrap+0x8/frame 0xfffffe00907f93c0 >> --- trap 0xc, rip = 0xffffffff8101f660, rsp = 0xfffffe00907f9490, rbp = >> 0xfffffe00907f9520 --- >> db_read_bytes() at db_read_bytes+0xa0/frame 0xfffffe00907f9520 >> db_get_value() at db_get_value+0x31/frame 0xfffffe00907f9560 >> db_backtrace() at db_backtrace+0x1d9/frame 0xfffffe00907f95e0 >> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame >> 0xfffffe00907f9660 >> vpanic() at vpanic+0x132/frame 0xfffffe00907f9790 >> panic() at panic+0x43/frame 0xfffffe00907f97f0 >> trap_fatal() at trap_fatal+0x40c/frame 0xfffffe00907f9850 >> trap_pfault() at trap_pfault+0xae/frame 0xfffffe00907f98c0 >> calltrap() at calltrap+0x8/frame 0xfffffe00907f98c0 >> --- trap 0xc, rip = 0xffffffff8101f660, rsp = 0xfffffe00907f9990, rbp = >> 0xfffffe00907f9a20 --- >> db_read_bytes() at db_read_bytes+0xa0/frame 0xfffffe00907f9a20 >> db_get_value() at db_get_value+0x31/frame 0xfffffe00907f9a60 >> db_backtrace() at db_backtrace+0x1d9/frame 0xfffffe00907f9ae0 >> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame >> 0xfffffe00907f9b60 >> vpanic() at vpanic+0x132/frame 0xfffffe00907f9c90 >> panic() at panic+0x43/frame 0xfffffe00907f9cf0 >> lkpi_sta_auth_to_scan() at lkpi_sta_auth_to_scan+0x388/frame >> 0xfffffe00907f9d70 >> lkpi_iv_newstate() at lkpi_iv_newstate+0x2eb/frame 0xfffffe00907f9df0 >> ieee80211_newstate_cb() at ieee80211_newstate_cb+0x1e7/frame >> 0xfffffe00907f9e40 >> taskqueue_run_locked() at taskqueue_run_locked+0xab/frame >> 0xfffffe00907f9ec0 >> taskqueue_thread_loop() at taskqueue_thread_loop+0xd3/frame >> 0xfffffe00907f9ef0 >> fork_exit() at fork_exit+0x82/frame 0xfffffe00907f9f30 >> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00907f9f30 >> --- trap 0x80bc1f07, rip = 0xffffffff80381e83, rsp = 0x3d7bb6db69f8, rbp = >> 0xfffffe00907fa4a0 --- >> cam_periph_release_locked_buses() at >> cam_periph_release_locked_buses+0x43/frame 0xfffffe00907fa4a0 >> kernel trap 12 with interrupts disabled >> ... >> >> -- >> Bjoern A. Zeeb r15:7 >> >> > -- Bjoern A. Zeeb r15:7