[Bug 274375] page fault while load kernel module virtio
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Date: Fri, 03 Nov 2023 03:05:21 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274375
--- Comment #3 from Zhenlei Huang <zlei@FreeBSD.org> ---
** UPDATE **
With 14.0-RC3 I am able to get the line number of sdt.ko.
Fatal trap 12: page fault while in kernel mode
cpuid = 2; apic id = 04
fault virtual address = 0x0
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff82e3a134
stack pointer = 0x28:0xfffffe00b0540920
frame pointer = 0x28:0xfffffe00b0540950
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 = 29038 (kldload)
rdi: fffff8002ce880e0 rsi: fffffe00b0540928 rdx: 0000000000000000
rcx: ffffffff82e9d470 r8: 0000000000000004 r9: 00000000000000f3
rax: 0000000000000000 rbx: fffffe00b0540974 rbp: fffffe00b0540950
r10: 0000000000000002 r11: ffffffffffffff90 r12: fffff8000a0d8000
r13: fffffe00b0540974 r14: fffff8000a1e5c40 r15: ffffffff82e9d468
trap number = 12
panic: page fault
cpuid = 2
time = 1698979988
KDB: stack backtrace:
#0 0xffffffff80b9002d at kdb_backtrace+0x5d
#1 0xffffffff80b43132 at vpanic+0x132
#2 0xffffffff80b42ff3 at panic+0x43
#3 0xffffffff8100c85c at trap_fatal+0x40c
#4 0xffffffff8100c8af at trap_pfault+0x4f
#5 0xffffffff80fe3818 at calltrap+0x8
#6 0xffffffff80b0f73c at linker_file_unload+0xcc
#7 0xffffffff810bfa78 at link_elf_load_file+0x198
#8 0xffffffff80b0efb3 at linker_load_module+0x9e3
#9 0xffffffff80b10cba at kern_kldload+0x16a
#10 0xffffffff80b10ddc at sys_kldload+0x5c
#11 0xffffffff8100d119 at amd64_syscall+0x109
#12 0xffffffff80fe412b at fast_syscall_common+0xf8
Uptime: 1m14s
Dumping 452 out of 8100 MB:..4%..11%..22%..32%..43%..54%..61%..71%..82%..92%
(kgdb) #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 0xffffffff80b42cc7 in kern_reboot (howto=260)
at /usr/src/sys/kern/kern_shutdown.c:526
#3 0xffffffff80b4319f in vpanic (fmt=0xffffffff81136b3b "%s",
ap=ap@entry=0xfffffe00b0540770) at /usr/src/sys/kern/kern_shutdown.c:970
#4 0xffffffff80b42ff3 in panic (fmt=<unavailable>)
at /usr/src/sys/kern/kern_shutdown.c:894
#5 0xffffffff8100c85c in trap_fatal (frame=0xfffffe00b0540860, eva=0)
at /usr/src/sys/amd64/amd64/trap.c:952
#6 0xffffffff8100c8af in trap_pfault (frame=0xfffffe00b0540860,
usermode=false, signo=<optimized out>, ucode=<optimized out>)
at /usr/src/sys/amd64/amd64/trap.c:760
#7 <signal handler called>
#8 0xffffffff82e3a134 in sdt_kld_unload_try (arg=<optimized out>,
lf=<optimized out>, error=0xfffffe00b0540974)
at /usr/src/sys/cddl/dev/sdt/sdt.c:343
#9 0xffffffff80b0f73c in linker_file_unload (
file=file@entry=0xfffff8003d292180, flags=flags@entry=1)
at /usr/src/sys/kern/kern_linker.c:673
#10 0xffffffff810bfa78 in link_elf_load_file (cls=<optimized out>,
filename=<optimized out>, result=<optimized out>)
at /usr/src/sys/kern/link_elf_obj.c:1241
#11 0xffffffff80b0efb3 in LINKER_LOAD_FILE (
cls=0xffffffff817560a8 <link_elf_class>, result=0xfffffe00b0540c00,
filename=<optimized out>) at ./linker_if.h:214
#12 linker_load_file (filename=<optimized out>, result=<optimized out>)
at /usr/src/sys/kern/kern_linker.c:459
#13 linker_load_module (kldname=kldname@entry=0xfffff8000a0c3800 "virtio.ko",
modname=modname@entry=0x0, parent=parent@entry=0x0,
verinfo=verinfo@entry=0x0, lfpp=lfpp@entry=0xfffffe00b0540d90)
at /usr/src/sys/kern/kern_linker.c:2203
#14 0xffffffff80b10cba in kern_kldload (td=td@entry=0xfffffe00b1522720,
file=file@entry=0xfffff8000a0c3800 "virtio.ko",
fileid=fileid@entry=0xfffffe00b0540de4)
at /usr/src/sys/kern/kern_linker.c:1162
#15 0xffffffff80b10ddc in sys_kldload (td=0xfffffe00b1522720,
uap=<optimized out>) at /usr/src/sys/kern/kern_linker.c:1185
#16 0xffffffff8100d119 in syscallenter (td=0xfffffe00b1522720)
at /usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:187
#17 amd64_syscall (td=0xfffffe00b1522720, traced=0)
at /usr/src/sys/amd64/amd64/trap.c:1197
#18 <signal handler called>
#19 0x00002ab829148b3a in ?? ()
Backtrace stopped: Cannot access memory at address 0x2ab8285939b8
(kgdb)
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