Date: Sat, 24 Aug 2019 18:38:54 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 240060] Fatal trap 12: page fault while in kernel mode: Cannot access memory at address 0x7fffffffe8a8 Message-ID: <bug-240060-227-HeLpKDFwfX@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-240060-227@https.bugs.freebsd.org/bugzilla/> References: <bug-240060-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240060 --- Comment #3 from Martin Filla <freebsd@sysctl.cz> --- It is suspicion on small stack overflow #0 __curthread () at ./machine/pcpu.h:234 #1 doadump (textdump=<optimized out>) at /usr/src/sys/kern/kern_shutdown.c:366 #2 0xffffffff80b9b09b in kern_reboot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:446 #3 0xffffffff80b9b513 in vpanic (fmt=<optimized out>, ap=0xfffffe006a2903b0) at /usr/src/sys/kern/kern_shutdown.c:872 #4 0xffffffff80b9b303 in panic (fmt=<unavailable>) at /usr/src/sys/kern/kern_shutdown.c:799 #5 0xffffffff81074bff in trap_fatal (frame=0xfffffe006a2905a0, eva=1040) at /usr/src/sys/amd64/amd64/trap.c:929 #6 0xffffffff81074c59 in trap_pfault (frame=0xfffffe006a2905a0, usermode=0) at /usr/src/sys/amd64/amd64/trap.c:765 #7 0xffffffff8107427e in trap (frame=0xfffffe006a2905a0) at /usr/src/sys/amd64/amd64/trap.c:441 #8 <signal handler called> #9 __mtx_lock_sleep (c=0xfffff8000ab50750, v=<optimized out>) at /usr/src/sys/kern/kern_mutex.c:565 #10 0xffffffff80ba6813 in _sleep (ident=0xfffffe004d5a2138, lock=0xfffff8000ab50738, priority=108, wmesg=0xffffffff8123a845 "-", sbt=0, pr=0, flags=256) at /usr/src/sys/kern/kern_synch.c:226 #11 0xffffffff80bfa339 in TQ_SLEEP (t=<error reading variable: Cannot access memory at address 0x0>, tq=<optimized out>, p=<optimized out>, m=<optimized out>, pri=<optimized out>, wm=<optimized out>) at /usr/src/sys/kern/subr_taskqueue.c:124 #12 taskqueue_drain (queue=0xfffff8000ab50700, task=0xfffffe004d5a2138) at /usr/src/sys/kern/subr_taskqueue.c:573 #13 0xffffffff80cfee78 in ieee80211_draintask (ic=0xfffffe004d5a2020, task=0x4) at /usr/src/sys/net80211/ieee80211_var.h:794 #14 ieee80211_waitfor_parent (ic=0xfffffe004d5a2020) at /usr/src/sys/net80211/ieee80211_proto.c:1440 #15 0xffffffff80ce4a82 in ieee80211_ioctl (ifp=0xfffff800b1cae800, cmd=<optimized out>, data=<optimized out>) at /usr/src/sys/net80211/ieee80211_ioctl.c:3535 #16 0xffffffff80c9ab6a in ifhwioctl (cmd=<optimized out>, ifp=<optimized out>, data=0xfffffe006a290a10 "wlan0", td=<optimized out>) at /usr/src/sys/net/if.c:2704 #17 0xffffffff80c9c0ff in ifioctl (so=0xfffff8023523b000, cmd=2149607696, data=<optimized out>, td=0xfffff80217205000) at /usr/src/sys/net/if.c:3124 #18 0xffffffff80c04e9d in fo_ioctl (fp=<optimized out>, com=<optimized out>, active_cred=0xfffff80217205000, td=<optimized out>, data=<optimized out>) at /usr/src/sys/sys/file.h:330 #19 kern_ioctl (td=0xfffff80217205000, fd=4, com=2149607696, data=0xffffffff82112320 <common_tss> "") at /usr/src/sys/kern/sys_generic.c:800 #20 0xffffffff80c04bbe in sys_ioctl (td=0xfffff80217205000, uap=0xfffff802172053c0) at /usr/src/sys/kern/sys_generic.c:712 #21 0xffffffff810756d9 in syscallenter (td=<optimized out>) at /usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:135 #22 amd64_syscall (td=0xfffff80217205000, traced=0) at /usr/src/sys/amd64/amd64/trap.c:1076 #23 <signal handler called> #24 0x00000008008d911a in ?? () Backtrace stopped: Cannot access memory at address 0x7fffffffe8a8 (kgdb) list 1455 * 1456 * Return 0 if we're ok, 1 if the channel needs to be reset. 1457 * 1458 * See PR kern/202502. 1459 */ 1460 static int 1461 ieee80211_start_check_reset_chan(struct ieee80211vap *vap) 1462 { 1463 struct ieee80211com *ic = vap->iv_ic; (kgdb) frame 14 #14 ieee80211_waitfor_parent (ic=0xfffffe004d5a2020) at /usr/src/sys/net80211/ieee80211_proto.c:1440 1440 ieee80211_draintask(ic, &ic->ic_parent_task); (kgdb) frame 13 #13 0xffffffff80cfee78 in ieee80211_draintask (ic=0xfffffe004d5a2020, task=0x4) at /usr/src/sys/net80211/ieee80211_var.h:794 794 taskqueue_drain(ic->ic_tq, task); (kgdb) frame 14 #14 ieee80211_waitfor_parent (ic=0xfffffe004d5a2020) at /usr/src/sys/net80211/ieee80211_proto.c:1440 1440 ieee80211_draintask(ic, &ic->ic_parent_task); (kgdb) print &ic->ic_parent_task $15 = (struct task *) 0xfffffe004d5a2138 -- You are receiving this mail because: You are the assignee for the bug.
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