[Bug 278161] [panic] kernel panic on kern_munmap from awk process
Date: Thu, 04 Apr 2024 09:29:40 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278161
Bug ID: 278161
Summary: [panic] kernel panic on kern_munmap from awk process
Product: Base System
Version: 14.0-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: bugs@FreeBSD.org
Reporter: supportme@ukr.net
[ng7:~]# kgdb /usr/lib/debug/boot/kernel/kernel.debug /var/crash/vmcore.0
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Reading symbols from /usr/lib/debug/boot/kernel/kernel.debug...
Unread portion of the kernel message buffer:
Fatal trap 12: page fault while in kernel mode
cpuid = 4; apic id = 04
fault virtual address = 0x30
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff80986d13
stack pointer = 0x28:0xfffffe010279abe0
frame pointer = 0x28:0xfffffe010279ac30
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 = 41337 (awk)
rdi: ffffffff80f5cdc0 rsi: fffffe010279acd0 rdx: 0000302d4e0a1000
rcx: 000007fd78a3807f r8: 000ffffffffff000 r9: fffffe010279acd0
rax: 0000000000000000 rbx: 0000000000000000 rbp: fffffe010279ac30
r10: 000007fffffff000 r11: 0000000000000000 r12: 0000000000000020
r13: fffff802875c7f80 r14: 0000000000000040 r15: fffff800271b1d38
trap number = 12
panic: page fault
cpuid = 4
time = 1712172060
KDB: stack backtrace:
#0 0xffffffff80688add at kdb_backtrace+0x5d
#1 0xffffffff8063f141 at vpanic+0x131
#2 0xffffffff8063f003 at panic+0x43
#3 0xffffffff80994e7f at trap_fatal+0x40f
#4 0xffffffff80994ecf at trap_pfault+0x4f
#5 0xffffffff8096d3a8 at calltrap+0x8
#6 0xffffffff8098c9dc at pmap_remove_ptes+0xdc
#7 0xffffffff8097d972 at pmap_remove1+0x552
#8 0xffffffff808f63ff at vm_map_delete+0x1af
#9 0xffffffff808ff730 at kern_munmap+0x90
#10 0xffffffff80995729 at amd64_syscall+0x109
#11 0xffffffff8096dcbb at fast_syscall_common+0xf8
Uptime: 64d6h51m44s
Dumping 6112 out of 32712 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91%
Reading symbols from /boot/kernel/zfs.ko...
Reading symbols from /usr/lib/debug//boot/kernel/zfs.ko.debug...
Reading symbols from /boot/kernel/acl_nfs4.ko...
Reading symbols from /usr/lib/debug//boot/kernel/acl_nfs4.ko.debug...
Reading symbols from /boot/kernel/xdr.ko...
Reading symbols from /usr/lib/debug//boot/kernel/xdr.ko.debug...
Reading symbols from /boot/kernel/cryptodev.ko...
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Reading symbols from /boot/kernel/ipmi.ko...
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Reading symbols from /boot/kernel/smbus.ko...
Reading symbols from /usr/lib/debug//boot/kernel/smbus.ko.debug...
Reading symbols from /boot/kernel/if_lagg.ko...
Reading symbols from /usr/lib/debug//boot/kernel/if_lagg.ko.debug...
Reading symbols from /boot/kernel/if_infiniband.ko...
Reading symbols from /usr/lib/debug//boot/kernel/if_infiniband.ko.debug...
Reading symbols from /boot/kernel/coretemp.ko...
Reading symbols from /usr/lib/debug//boot/kernel/coretemp.ko.debug...
Reading symbols from /boot/kernel/ichsmb.ko...
Reading symbols from /usr/lib/debug//boot/kernel/ichsmb.ko.debug...
Reading symbols from /boot/kernel/uhid.ko...
Reading symbols from /usr/lib/debug//boot/kernel/uhid.ko.debug...
Reading symbols from /boot/kernel/ums.ko...
Reading symbols from /usr/lib/debug//boot/kernel/ums.ko.debug...
Reading symbols from /boot/kernel/usbhid.ko...
Reading symbols from /usr/lib/debug//boot/kernel/usbhid.ko.debug...
Reading symbols from /boot/kernel/hidbus.ko...
--Type <RET> for more, q to quit, c to continue without paging--
Reading symbols from /usr/lib/debug//boot/kernel/hidbus.ko.debug...
Reading symbols from /boot/kernel/mac_ntpd.ko...
Reading symbols from /usr/lib/debug//boot/kernel/mac_ntpd.ko.debug...
__curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:57
57 __asm("movq %%gs:%P1,%0" : "=r" (td) : "n" (offsetof(struct
pcpu,
(kgdb) bt
#0 __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:57
#1 doadump (textdump=<optimized out>) at /usr/src/sys/kern/kern_shutdown.c:405
#2 0xffffffff8063ecd7 in kern_reboot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:523
#3 0xffffffff8063f1ae in vpanic (fmt=0xffffffff80a260e3 "%s",
ap=ap@entry=0xfffffe010279aa30) at /usr/src/sys/kern/kern_shutdown.c:967
#4 0xffffffff8063f003 in panic (fmt=<unavailable>) at
/usr/src/sys/kern/kern_shutdown.c:891
#5 0xffffffff80994e7f in trap_fatal (frame=0xfffffe010279ab20, eva=48) at
/usr/src/sys/amd64/amd64/trap.c:952
#6 0xffffffff80994ecf in trap_pfault (frame=0xfffffe010279ab20,
usermode=false, signo=<optimized out>, ucode=<optimized out>) at
/usr/src/sys/amd64/amd64/trap.c:760
#7 <signal handler called>
#8 pmap_remove_pte (pmap=pmap@entry=0xfffff800271b1d38,
ptq=ptq@entry=0xfffff803f4a0c508, va=va@entry=52971140943872,
ptepde=16989077607, free=free@entry=0xfffffe010279acb0,
lockp=lockp@entry=0xfffffe010279acd0)
at /usr/src/sys/amd64/amd64/pmap.c:6287
#9 0xffffffff8098c9dc in pmap_remove_ptes (pmap=pmap@entry=0xfffff800271b1d38,
sva=52971140943872, sva@entry=52971140415488, eva=eva@entry=52971142381568,
pde=0xfffff80016da7380, free=free@entry=0xfffffe010279acb0,
lockp=lockp@entry=0xfffffe010279acd0) at
/usr/src/sys/amd64/amd64/pmap.c:6352
#10 0xffffffff8097d972 in pmap_remove1 (pmap=0xfffff800271b1d38,
sva=52971140415488, eva=52971142512640, map_delete=<optimized out>) at
/usr/src/sys/amd64/amd64/pmap.c:6505
#11 0xffffffff8097dadf in pmap_map_delete (pmap=0xffffffff80f5cdc0
<vm_phys_fictitious_reg_lock>, sva=18446741879022791888, eva=52971140943872) at
/usr/src/sys/amd64/amd64/pmap.c:6539
#12 0xffffffff808f63ff in vm_map_delete (map=map@entry=0xfffff800271b1c08,
start=start@entry=52971140415488, end=end@entry=52971142512640) at
/usr/src/sys/vm/vm_map.c:4045
#13 0xffffffff808ff730 in kern_munmap (td=0xfffff800036f8000, addr0=<optimized
out>, size=<optimized out>) at /usr/src/sys/vm/vm_mmap.c:619
#14 0xffffffff80995729 in syscallenter (td=0xfffff800036f8000) at
/usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:188
#15 amd64_syscall (td=0xfffff800036f8000, traced=0) at
/usr/src/sys/amd64/amd64/trap.c:1194
#16 <signal handler called>
#17 0x00000008233b5d3a in ?? ()
Backtrace stopped: Cannot access memory at address 0x820aeeb28
(kgdb) up
#1 doadump (textdump=<optimized out>) at /usr/src/sys/kern/kern_shutdown.c:405
405 dump_savectx();
(kgdb)
#2 0xffffffff8063ecd7 in kern_reboot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:523
523 doadump(TRUE);
(kgdb)
#3 0xffffffff8063f1ae in vpanic (fmt=0xffffffff80a260e3 "%s",
ap=ap@entry=0xfffffe010279aa30) at /usr/src/sys/kern/kern_shutdown.c:967
967 kern_reboot(bootopt);
(kgdb)
#4 0xffffffff8063f003 in panic (fmt=<unavailable>) at
/usr/src/sys/kern/kern_shutdown.c:891
891 vpanic(fmt, ap);
(kgdb)
#5 0xffffffff80994e7f in trap_fatal (frame=0xfffffe010279ab20, eva=48) at
/usr/src/sys/amd64/amd64/trap.c:952
952 panic("%s", type < nitems(trap_msg) ? trap_msg[type] :
(kgdb) p type
$27 = <optimized out>
(kgdb) l
947 if (handled)
948 return;
949 }
950 #endif
951 printf("trap number = %d\n", type);
952 panic("%s", type < nitems(trap_msg) ? trap_msg[type] :
953 "unknown/reserved trap");
954 }
955
956 #ifdef KDTRACE_HOOKS
(kgdb) l -
937 printf("r10: %016lx r11: %016lx r12: %016lx\n", frame->tf_r10,
938 frame->tf_r11, frame->tf_r12);
939 printf("r13: %016lx r14: %016lx r15: %016lx\n", frame->tf_r13,
940 frame->tf_r14, frame->tf_r15);
941
942 #ifdef KDB
943 if (debugger_on_trap) {
944 kdb_why = KDB_WHY_TRAP;
945 handled = kdb_trap(type, 0, frame);
946 kdb_why = KDB_WHY_UNSET;
(kgdb) p frame
$28 = (struct trapframe *) 0xfffffe010279ab20
(kgdb) p *frame
$29 = {tf_rdi = -2131374656, tf_rsi = -2194686759728, tf_rdx = 52971140943872,
tf_rcx = 8785232101503, tf_r8 = 4503599627366400, tf_r9 = -2194686759728,
tf_rax = 0, tf_rbx = 0, tf_rbp = -2194686759888, tf_r10 = 8796093018112,
tf_r11 = 0, tf_r12 = 32, tf_r13 = -8785232101504, tf_r14 = 64, tf_r15 =
-8795436933832, tf_trapno = 12, tf_fs = 19, tf_gs = 27, tf_addr = 48, tf_flags
= 1, tf_es = 59, tf_ds = 59, tf_err = 0, tf_rip = -2137494253, tf_cs = 32,
tf_rflags = 66118, tf_rsp = -2194686759968, tf_ss = 40}
(kgdb) up
#6 0xffffffff80994ecf in trap_pfault (frame=0xfffffe010279ab20,
usermode=false, signo=<optimized out>, ucode=<optimized out>) at
/usr/src/sys/amd64/amd64/trap.c:760
760 if (td->td_critnest != 0 ||
(kgdb) l
755 * lock, then it is most likely a fatal kernel page
fault.
756 * If WITNESS is enabled, then it's going to whine
about
757 * bogus LORs with various VM locks, so just skip to
the
758 * fatal trap handling directly.
759 */
760 if (td->td_critnest != 0 ||
761 WITNESS_CHECK(WARN_SLEEPOK | WARN_GIANTOK, NULL,
762 "Kernel page fault") != 0) {
763 trap_fatal(frame, eva);
764 return (-1);
(kgdb) p frame
$30 = (struct trapframe *) 0xfffffe010279ab20
(kgdb) p eva
$31 = 48
(kgdb) p td
$32 = (struct thread *) 0xfffff800036f8000
(kgdb) p *td
$33 = {td_lock = 0xfffffe0038409200, td_proc = 0xfffffe00e056c580, td_plist =
{tqe_next = 0x0, tqe_prev = 0xfffffe00e056c590}, td_runq = {tqe_next = 0x0,
tqe_prev = 0xfffffe0038409408}, {td_slpq = {tqe_next = 0x0,
tqe_prev = 0xfffff8039730a580}, td_zombie = 0x0}, td_lockq = {tqe_next =
0x0, tqe_prev = 0xfffffe0143d4ea58}, td_hash = {le_next = 0x0, le_prev =
0xfffffe00e00a5ec0}, td_cpuset = 0xfffff80002ae6d00, td_domain = {
dr_policy = 0xffffffff80c01110 <domainset_firsttouch>, dr_iter = 239359},
td_sel = 0x0, td_sleepqueue = 0xfffff8039730a580, td_turnstile =
0xfffff80002e37900, td_rlqe = 0xfffff8000cd42e10, td_umtxq =
0xfffff80003700480,
td_tid = 100312, td_sigqueue = {sq_signals = {__bits = {0, 0, 0, 0}}, sq_kill
= {__bits = {0, 0, 0, 0}}, sq_ptrace = {__bits = {0, 0, 0, 0}}, sq_list =
{tqh_first = 0x0, tqh_last = 0xfffff800036f80d8}, sq_proc = 0xfffffe00e056c580,
sq_flags = 1}, td_lend_user_pri = 255 '\377', td_allocdomain = 0 '\000',
td_base_ithread_pri = 0 '\000', td_kmsan = 0x0, td_flags = 6, td_ast = 0,
td_inhibitors = 0, td_pflags = 0, td_pflags2 = 0, td_dupfd = 0, td_sqqueue = 0,
td_wchan = 0x0, td_wmesg = 0x0, td_owepreempt = 0 '\000', td_tsqueue = 0
'\000', td_stopsched = 1 '\001', td_locks = 0, td_rw_rlocks = 0, td_sx_slocks =
0, td_lk_slocks = 0, td_blocked = 0x0, td_lockname = 0x0, td_contested = {
lh_first = 0x0}, td_sleeplocks = 0x0, td_intr_nesting_level = 0, td_pinned
= 1, td_realucred = 0xfffff8036a565800, td_ucred = 0xfffff8036a565800, td_limit
= 0xfffff803d5a6f500, td_slptick = 0, td_blktick = 0,
td_swvoltick = -888747322, td_swinvoltick = 0, td_cow = 28, td_ru = {ru_utime
= {tv_sec = 0, tv_usec = 0}, ru_stime = {tv_sec = 0, tv_usec = 0}, ru_maxrss =
0, ru_ixrss = 0, ru_idrss = 0, ru_isrss = 0, ru_minflt = 65, ru_majflt = 0,
ru_nswap = 0, ru_inblock = 0, ru_oublock = 0, ru_msgsnd = 0, ru_msgrcv = 0,
ru_nsignals = 0, ru_nvcsw = 1, ru_nivcsw = 0}, td_rux = {rux_runtime = 0,
rux_uticks = 0, rux_sticks = 0, rux_iticks = 0, rux_uu = 0, rux_su = 0,
rux_tu = 0}, td_incruntime = 562220, td_runtime = 562220, td_pticks = 0,
td_sticks = 0, td_iticks = 0, td_uticks = 0, td_intrval = 0, td_oldsigmask =
{__bits = {0, 0, 0, 0}}, td_generation = 1, td_sigstk = {ss_sp = 0x0, ss_size =
0,
ss_flags = 4}, td_xsig = 0, td_profil_addr = 0, td_profil_ticks = 0,
td_name = "awk", '\000' <repeats 16 times>, td_fpop = 0x0, td_dbgflags = 0,
td_si = {si_signo = 0, si_errno = 0, si_code = 0, si_pid = 0, si_uid = 0,
si_status = 0, si_addr = 0x0, si_value = {sival_int = 0, sival_ptr = 0x0,
sigval_int = 0, sigval_ptr = 0x0}, _reason = {_fault = {_trapno = 0}, _timer =
{_timerid = 0, _overrun = 0}, _mesgq = {_mqd = 0}, _poll = {_band = 0},
_capsicum = {_syscall = 0}, __spare__ = {__spare1__ = 0, __spare2__ = {0,
0, 0, 0, 0, 0, 0}}}}, td_ng_outbound = 0, td_osd = {osd_nslots = 0, osd_slots =
0x0, osd_next = {le_next = 0x0, le_prev = 0x0}}, td_map_def_user = 0x0,
td_dbg_forked = 0, td_vp_reserved = 0x0, td_no_sleeping = 0, td_su = 0x0,
td_sleeptimo = 0, td_rtcgen = 0, td_errno = 0, td_vslock_sz = 0, td_kcov_info =
0x0, td_ucredref = -9, td_sigmask = {__bits = {0, 0, 0, 0}},
td_rqindex = 25 '\031', td_base_pri = 52 '4', td_priority = 52 '4',
td_pri_class = 3 '\003', td_user_pri = 100 'd', td_base_user_pri = 100 'd',
td_rb_list = 0, td_rbp_list = 0, td_rb_inact = 0, td_sa = {code = 73,
original_code = 73,
callp = 0xffffffff80c486b0 <sysent+2336>, args = {52971140415488, 2097152,
3, 2097151, 0, 0, 0, 0}}, td_sigblock_ptr = 0x5594989a4910, td_sigblock_val =
0, td_pcb = 0xfffff800036f8520, td_state = TDS_RUNNING, td_uretoff = {
tdu_retval = {0, 3}, tdu_off = 0}, td_cowgen = 0, td_slpcallout = {c_links
= {le = {le_next = 0x0, le_prev = 0xfffffe003843cb20}, sle = {sle_next = 0x0},
tqe = {tqe_next = 0x0, tqe_prev = 0xfffffe003843cb20}},
c_time = 23856685301620388, c_precision = 80530631250, c_arg =
0xfffff800036f8000, c_func = 0xffffffff806988b0 <sleepq_timeout>, c_lock = 0x0,
c_flags = 0, c_iflags = 272, c_cpu = 0}, td_frame = 0xfffffe010279af40,
td_kstack = 18446741879022776320, td_kstack_pages = 4, td_critnest = 1, td_md
= {md_spinlock_count = 1, md_saved_flags = 582, md_spurflt_addr =
47518932344832, md_invl_gen = {gen = 6283878933, {link = {le_next = 0x0,
le_prev = 0x64}, {
next = 0x0, saved_pri = 100 'd'}}}, md_efirt_tmp = 0, md_efirt_dis_pf
= 0, md_pcb = {pcb_r15 = -2131742328, pcb_r14 = -2198079557120, pcb_r13 =
-8796049711104, pcb_r12 = -2141217104, pcb_rbp = 0, pcb_rsp = -2194686759112,
pcb_rbx = -8796035383296, pcb_rip = -2137594880, pcb_fsbase = 0,
pcb_gsbase = 0, pcb_kgsbase = 0, pcb_cr0 = 0, pcb_cr2 = 0, pcb_cr3 = 0, pcb_cr4
= 0, pcb_dr0 = 0, pcb_dr1 = 0, pcb_dr2 = 0, pcb_dr3 = 0, pcb_dr6 = 0, pcb_dr7 =
0,
pcb_gdt = {rd_limit = 0, rd_base = 0}, pcb_idt = {rd_limit = 0, rd_base =
0}, pcb_ldt = {rd_limit = 0, rd_base = 0}, pcb_tr = 0, pcb_flags = 24,
pcb_initial_fpucw = 895, pcb_onfault = 0x0, pcb_saved_ucr3 = 0, pcb_tssp = 0x0,
pcb_efer = 0, pcb_star = 0, pcb_lstar = 0, pcb_cstar = 0, pcb_sfmask = 0,
pcb_save = 0xfffffe0105e94380, pcb_pad = {0, 0, 0, 0, 0}}, md_stack_base =
18446741879022792704, md_usr_fpu_save = 0xfffffe0105e94380}, td_ar = 0x0,
td_lprof = {{lh_first = 0x0}, {lh_first = 0x0}}, td_dtrace =
0xfffff8000c970b00, td_vnet = 0x0, td_vnet_lpush = 0x0, td_intr_frame = 0x0,
td_rfppwait_p = 0xfffffe01401b5000, td_ma = 0x0, td_ma_cnt = 0, td_emuldata =
0x0,
td_lastcpu = 4, td_oncpu = 4, td_lkpi_task = 0x0, td_pmcpend = 0,
td_remotereq = 0x0, td_ktr_io_lim = 0}
(kgdb) up
#7 <signal handler called>
(kgdb) up
#8 pmap_remove_pte (pmap=pmap@entry=0xfffff800271b1d38,
ptq=ptq@entry=0xfffff803f4a0c508, va=va@entry=52971140943872,
ptepde=16989077607, free=free@entry=0xfffffe010279acb0,
lockp=lockp@entry=0xfffffe010279acd0)
at /usr/src/sys/amd64/amd64/pmap.c:6287
6287 CHANGE_PV_LIST_LOCK_TO_VM_PAGE(lockp, m);
(kgdb) p m
$34 = (vm_page_t) 0x0
(kgdb) p lockp
$35 = (struct rwlock **) 0xfffffe010279acd0
(kgdb) p *lockp
$36 = (struct rwlock *) 0x0
(kgdb) l
6282 m = PHYS_TO_VM_PAGE(oldpte & PG_FRAME);
6283 if ((oldpte & (PG_M | PG_RW)) == (PG_M | PG_RW))
6284 vm_page_dirty(m);
6285 if (oldpte & PG_A)
6286 vm_page_aflag_set(m, PGA_REFERENCED);
6287 CHANGE_PV_LIST_LOCK_TO_VM_PAGE(lockp, m);
6288 pmap_pvh_free(&m->md, pmap, va);
6289 if (TAILQ_EMPTY(&m->md.pv_list) &&
6290 (m->flags & PG_FICTITIOUS) == 0) {
6291 pvh = pa_to_pvh(VM_PAGE_TO_PHYS(m));
(kgdb) p oldpte
$37 = 18446735288477450112
(kgdb) l -
6272 PG_A = pmap_accessed_bit(pmap);
6273 PG_M = pmap_modified_bit(pmap);
6274 PG_RW = pmap_rw_bit(pmap);
6275
6276 PMAP_LOCK_ASSERT(pmap, MA_OWNED);
6277 oldpte = pte_load_clear(ptq);
6278 if (oldpte & PG_W)
6279 pmap->pm_stats.wired_count -= 1;
6280 pmap_resident_count_adj(pmap, -1);
6281 if (oldpte & PG_MANAGED) {
(kgdb) p pmap
$38 = (pmap_t) 0xfffff800271b1d38
(kgdb) p *pmap
$39 = {pm_mtx = {lock_object = {lo_name = 0xffffffff80a4bc2c "pmap", lo_flags =
21168128, lo_data = 0, lo_witness = 0x0}, mtx_lock = 18446735277674168320},
pm_pmltop = 0xfffff802b9d05000, pm_pmltopu = 0x0, pm_cr3 = 11707371520,
pm_ucr3 = 18446744073709551615, pm_pvchunk = {tqh_first = 0xfffff806412fb000,
tqh_last = 0xfffff807d1faf008}, pm_active = {__bits = {16, 0 <repeats 15
times>}}, pm_type = PT_X86, pm_stats = {resident_count = 524, wired_count =
-1},
pm_root = {rt_root = 0x1}, pm_eptgen = 0, pm_eptsmr = 0x0, pm_flags = 256,
pm_pcidp = 0xfffffe015e1c6108, pm_pkru = {rs_trie = {pt_root = 0x0},
rs_dup_data = 0x0, rs_free_data = 0x0, rs_data_ctx = 0x0, rs_alloc_flags = 0}}
(kgdb) p ptq
$40 = (pt_entry_t *) 0xfffff803f4a0c508
(kgdb) p *ptq
Cannot access memory at address 0xfffff803f4a0c508
(kgdb) up
#9 0xffffffff8098c9dc in pmap_remove_ptes (pmap=pmap@entry=0xfffff800271b1d38,
sva=52971140943872, sva@entry=52971140415488, eva=eva@entry=52971142381568,
pde=0xfffff80016da7380, free=free@entry=0xfffffe010279acb0,
lockp=lockp@entry=0xfffffe010279acd0) at
/usr/src/sys/amd64/amd64/pmap.c:6352
6352 if (pmap_remove_pte(pmap, pte, sva, *pde, free, lockp))
{
(kgdb) p pmap
$41 = (pmap_t) 0xfffff800271b1d38
(kgdb) p pte
$42 = (pt_entry_t *) 0xfffff803f4a0c508
(kgdb) p sva
$43 = 52971140943872
(kgdb) p *pde
Cannot access memory at address 0xfffff80016da7380
(kgdb) p free
$44 = (struct spglist *) 0xfffffe010279acb0
(kgdb) p *free
$45 = {slh_first = 0x0}
(kgdb) p lockp
$46 = (struct rwlock **) 0xfffffe010279acd0
(kgdb) l
6347 }
6348 if ((*pte & PG_G) == 0)
6349 anyvalid = true;
6350 else if (va == eva)
6351 va = sva;
6352 if (pmap_remove_pte(pmap, pte, sva, *pde, free, lockp))
{
6353 sva += PAGE_SIZE;
6354 break;
6355 }
6356 }
(kgdb) up
#10 0xffffffff8097d972 in pmap_remove1 (pmap=0xfffff800271b1d38,
sva=52971140415488, eva=52971142512640, map_delete=<optimized out>) at
/usr/src/sys/amd64/amd64/pmap.c:6505
6505 if (pmap_remove_ptes(pmap, sva, va_next, pde, &free,
&lock))
(kgdb) l
6500 * range being removed.
6501 */
6502 if (va_next > eva)
6503 va_next = eva;
6504
6505 if (pmap_remove_ptes(pmap, sva, va_next, pde, &free,
&lock))
6506 anyvalid = 1;
6507 }
6508 if (lock != NULL)
6509 rw_wunlock(lock);
(kgdb) p pmap
$47 = (pmap_t) 0xfffff800271b1d38
(kgdb) p sva
$48 = 52971140415488
(kgdb) p va_next
$49 = 52971142381568
(kgdb) p pde
$50 = <optimized out>
(kgdb) p &free
$51 = (struct spglist *) 0xfffffe010279acb0
(kgdb) p &lock
$52 = (struct rwlock **) 0xfffffe010279acd0
(kgdb) up
#11 0xffffffff8097dadf in pmap_map_delete (pmap=0xffffffff80f5cdc0
<vm_phys_fictitious_reg_lock>, sva=18446741879022791888, eva=52971140943872) at
/usr/src/sys/amd64/amd64/pmap.c:6539
6539 pmap_remove1(pmap, sva, eva, true);
(kgdb) l
6534 * of a logical mapping.
6535 */
6536 void
6537 pmap_map_delete(pmap_t pmap, vm_offset_t sva, vm_offset_t eva)
6538 {
6539 pmap_remove1(pmap, sva, eva, true);
6540 }
6541
6542 /*
6543 * Routine: pmap_remove_all
(kgdb) p pmap
$53 = (pmap_t) 0xffffffff80f5cdc0 <vm_phys_fictitious_reg_lock>
(kgdb) p sva
$54 = 18446741879022791888
(kgdb) p eva
$55 = 52971140943872
(kgdb) up
#12 0xffffffff808f63ff in vm_map_delete (map=map@entry=0xfffff800271b1c08,
start=start@entry=52971140415488, end=end@entry=52971142512640) at
/usr/src/sys/vm/vm_map.c:4045
4045 pmap_map_delete(map->pmap, entry->start,
entry->end);
(kgdb) l
4040 * mappings could exist. For instance, it does not
4041 * make sense to call pmap_remove() for guard entries.
4042 */
4043 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) != 0 ||
4044 entry->object.vm_object != NULL)
4045 pmap_map_delete(map->pmap, entry->start,
entry->end);
4046
4047 if (entry->end == map->anon_loc)
4048 map->anon_loc = entry->start;
4049
(kgdb) p entry
$56 = <optimized out>
(kgdb) up
#13 0xffffffff808ff730 in kern_munmap (td=0xfffff800036f8000, addr0=<optimized
out>, size=<optimized out>) at /usr/src/sys/vm/vm_mmap.c:619
619 rv = vm_map_delete(map, addr, end);
(kgdb) l
614 }
615 }
616 }
617 }
618 #endif
619 rv = vm_map_delete(map, addr, end);
620
621 #ifdef HWPMC_HOOKS
622 if (rv == KERN_SUCCESS && __predict_false(pmc_handled)) {
623 /* downgrade the lock to prevent a LOR with the pmc-sx
lock */
(kgdb) p map
$57 = (vm_map_t) 0xfffff800271b1c08
(kgdb) p addr
$58 = 52971140415488
(kgdb) p end
$59 = 52971142512640
(kgdb) up
#14 0xffffffff80995729 in syscallenter (td=0xfffff800036f8000) at
/usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:188
188 error = (se->sy_call)(td, sa->args);
(kgdb) l
183 #endif
184
185 if (!sy_thr_static)
186 syscall_thread_exit(td, se);
187 } else {
188 error = (se->sy_call)(td, sa->args);
189 /* Save the latest error return value. */
190 if (__predict_false((td->td_pflags & TDP_NERRNO) != 0))
191 td->td_pflags &= ~TDP_NERRNO;
192 else
(kgdb) p se
$60 = (struct sysent *) 0xffffffff80c486b0 <sysent+2336>
(kgdb) p *se
$61 = {sy_call = 0xffffffff808ff680 <sys_munmap>, sy_systrace_args_func = 0x0,
sy_narg = 2 '\002', sy_flags = 1 '\001', sy_auevent = 213, sy_entry = 0,
sy_return = 0, sy_thrcnt = 1}
(kgdb) p td
$62 = (struct thread *) 0xfffff800036f8000
(kgdb) p sa
$63 = <optimized out>
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