On 10/13/19, Evilham <contact_at_evilham.com> wrote: > Hello, > > I somehow had managed to mess up my build system and only > yesterday got it back to compiling properly. > So to be clear, there is an unrelated bug where it seems the module can decide to abort loading and then it crashes in pseudofs. This can happen if there is a mismatch between the kernel and the module itself. > > On ds., oct. 12 2019, Mateusz Guzik wrote: > >> Try this: >> >> https://people.freebsd.org/~mjg/pmap-fict-invl.diff > > > I tested this patch on top of r353449 and a panic is still > ocurring when the drm-kmod modules are loaded. > > This is on a Lenovo A485 Laptop, which is an AMD Ryzen processor > and a Radeon Vega graphics. > My last known working revision is r352987. > > > Here are bits of the core dump, I hope they are useful, if more > information is needed, please don't hesitate to ask. > BTW: I usually compile GENERIC-NODEBUG, if that results in the > dump being useless (sadly I can't tell), I can disable all the > performance goodies and compile GENERIC :-). > -- > Evilham > > > Fatal trap 12: page fault while in kernel mode > cpuid = 2; apic id = 02 > fault virtual address = 0xf8 > fault code = supervisor read data, page not present > instruction pointer = 0x20:0xffffffff80b1be61 > stack pointer = 0x28:0xfffffe00dd81ccc0 > frame pointer = 0x28:0xfffffe00dd81ccf0 > 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 = 24022 (kldload) > trap number = 12 > panic: page fault > cpuid = 2 > time = 1570970502 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame > 0xfffffe00dd81c920 > vpanic() at vpanic+0x17e/frame 0xfffffe00dd81c980 > panic() at panic+0x43/frame 0xfffffe00dd81c9e0 > trap_pfault() at trap_pfault/frame 0xfffffe00dd81ca50 > trap_pfault() at trap_pfault+0x4f/frame 0xfffffe00dd81cac0 > trap() at trap+0x288/frame 0xfffffe00dd81cbf0 > calltrap() at calltrap+0x8/frame 0xfffffe00dd81cbf0 > --- trap 0xc, rip = 0xffffffff80b1be61, rsp = 0xfffffe00dd81ccc0, > rbp = 0xfffffe00dd81ccf0 --- > pfs_destroy() at pfs_destroy+0x11/frame 0xfffffe00dd81ccf0 > pfs_uninit() at pfs_uninit+0x16/frame 0xfffffe00dd81cd10 > vfs_modevent() at vfs_modevent+0x474/frame 0xfffffe00dd81cd50 > module_register_init() at module_register_init+0xa4/frame > 0xfffffe00dd81cd80 > linker_load_module() at linker_load_module+0xb49/frame > 0xfffffe00dd81d0a0 > linker_load_dependencies() at linker_load_dependencies+0x18c/frame > 0xfffffe00dd81d0f0 > link_elf_load_file() at link_elf_load_file+0x1127/frame > 0xfffffe00dd81d1b0 > linker_load_module() at linker_load_module+0x89a/frame > 0xfffffe00dd81d4d0 > linker_load_dependencies() at linker_load_dependencies+0x18c/frame > 0xfffffe00dd81d520 > link_elf_load_file() at link_elf_load_file+0x1127/frame > 0xfffffe00dd81d5e0 > linker_load_module() at linker_load_module+0x89a/frame > 0xfffffe00dd81d900 > kern_kldload() at kern_kldload+0xbd/frame 0xfffffe00dd81d950 > sys_kldload() at sys_kldload+0x5b/frame 0xfffffe00dd81d980 > amd64_syscall() at amd64_syscall+0x3a3/frame 0xfffffe00dd81dab0 > fast_syscall_common() at fast_syscall_common+0x101/frame > 0xfffffe00dd81dab0 > --- syscall (304, FreeBSD ELF64, sys_kldload), rip = 0x8002d1cda, > rsp = 0x7fffffffd748, rbp = 0x7fffffffdcc0 --- > KDB: enter: panic > > > __curthread () at /freebsd/src/sys/amd64/include/pcpu_aux.h:55 > 55 __asm("movq %%gs:%P1,%0" : "=r" (td) : "n" > (offsetof(struct pcpu, > (kgdb) #0 __curthread () at > /freebsd/src/sys/amd64/include/pcpu_aux.h:55 > #1 doadump (textdump=0) at > /freebsd/src/sys/kern/kern_shutdown.c:392 > #2 0xffffffff80496a7a in db_dump (dummy=<optimized out>, > dummy2=<unavailable>, dummy3=<unavailable>, > dummy4=<unavailable>) > at /freebsd/src/sys/ddb/db_command.c:575 > #3 0xffffffff8049683c in db_command (last_cmdp=<optimized out>, > cmd_table=<optimized out>, dopager=1) > at /freebsd/src/sys/ddb/db_command.c:482 > #4 0xffffffff804965ad in db_command_loop () > at /freebsd/src/sys/ddb/db_command.c:535 > #5 0xffffffff80499858 in db_trap (type=<optimized out>, > code=<optimized out>) > at /freebsd/src/sys/ddb/db_main.c:252 > #6 0xffffffff80c322a7 in kdb_trap (type=3, code=0, tf=<optimized > out>) > at /freebsd/src/sys/kern/subr_kdb.c:692 > #7 0xffffffff8105d925 in trap (frame=0xfffffe00dd81c850) > at /freebsd/src/sys/amd64/amd64/trap.c:585 > #8 <signal handler called> > #9 kdb_enter (why=0xffffffff811dee7e "panic", msg=<optimized > out>) > at /freebsd/src/sys/kern/subr_kdb.c:479 > #10 0xffffffff80be377a in vpanic (fmt=<optimized out>, > ap=<optimized out>) > at /freebsd/src/sys/kern/kern_shutdown.c:897 > #11 0xffffffff80be35d3 in panic ( > fmt=0xffffffff818e4c18 <vt_conswindow+16> > "\357\327\037\201\377\377\377\377") at > /freebsd/src/sys/kern/kern_shutdown.c:835 > #12 0xffffffff8105ddb0 in trap_fatal (frame=0xfffffe00dd81cc00, > eva=248) > at /freebsd/src/sys/amd64/amd64/trap.c:925 > #13 0xffffffff8105ddff in trap_pfault (frame=0xfffffe00dd81cc00, > usermode=<optimized out>, signo=<optimized out>, > ucode=<optimized out>) > at /freebsd/src/sys/amd64/amd64/trap.c:743 > #14 0xffffffff8105d458 in trap (frame=0xfffffe00dd81cc00) > at /freebsd/src/sys/amd64/amd64/trap.c:407 > #15 <signal handler called> > #16 pfs_destroy (pn=0x0) at > /freebsd/src/sys/fs/pseudofs/pseudofs.c:324 > #17 0xffffffff80b1ca96 in pfs_uninit ( > pi=0xffffffff8360f120 <anon_inodefs_info>, > vfc=0xffffffff8360f010 <anon_inodefs_vfsconf>) > at /freebsd/src/sys/fs/pseudofs/pseudofs.c:473 > #18 0xffffffff80caddd4 in vfs_register ( > vfc=0xffffffff8360f010 <anon_inodefs_vfsconf>) > at /freebsd/src/sys/kern/vfs_init.c:497 > #19 vfs_modevent (mod=<optimized out>, type=<optimized out>, > data=0xffffffff8360f010 <anon_inodefs_vfsconf>) > at /freebsd/src/sys/kern/vfs_init.c:582 > #20 0xffffffff80bc0b24 in module_register_init ( > arg=0xffffffff8360eff8 <anon_inodefs_mod>) > at /freebsd/src/sys/kern/kern_module.c:123 > #21 0xffffffff80bb26b9 in linker_file_sysinit (lf=<optimized out>) > at /freebsd/src/sys/kern/kern_linker.c:236 > #22 linker_load_file (filename=<optimized out>, result=<optimized > out>) > at /freebsd/src/sys/kern/kern_linker.c:462 > #23 linker_load_module (kldname=<optimized out>, > modname=0xffffffff835d4c80 "linuxkpi_gplv2", parent=<optimized > out>, > verinfo=<optimized out>, lfpp=<optimized out>) > at /freebsd/src/sys/kern/kern_linker.c:2110 > #24 0xffffffff80bb4eec in linker_load_dependencies > (lf=0xfffff800060dcc00) > at /freebsd/src/sys/kern/kern_linker.c:2200 > #25 0xffffffff810d6027 in link_elf_load_file (cls=<optimized out>, > filename=0xfffff8000645bcc0 "/boot/modules/drm.ko", > result=0xfffffe00dd81d358) at > /freebsd/src/sys/kern/link_elf_obj.c:1004 > #26 0xffffffff80bb240a in LINKER_LOAD_FILE ( > cls=0xffffffff81972e90 <link_elf_class>, filename=<optimized > out>, > result=<optimized out>) at ./linker_if.h:180 > #27 linker_load_file (filename=<optimized out>, result=<optimized > out>) > at /freebsd/src/sys/kern/kern_linker.c:447 > #28 linker_load_module (kldname=<optimized out>, > modname=0xffffffff83542bc4 "drmn", parent=<optimized out>, > verinfo=<optimized out>, lfpp=<optimized out>) > at /freebsd/src/sys/kern/kern_linker.c:2110 > #29 0xffffffff80bb4eec in linker_load_dependencies > (lf=0xfffff800060db200) > at /freebsd/src/sys/kern/kern_linker.c:2200 > #30 0xffffffff810d6027 in link_elf_load_file (cls=<optimized out>, > filename=0xfffff8000503ed80 "/boot/modules/amdgpu.ko", > result=0xfffffe00dd81d788) at > /freebsd/src/sys/kern/link_elf_obj.c:1004 > #31 0xffffffff80bb240a in LINKER_LOAD_FILE ( > cls=0xffffffff81972e90 <link_elf_class>, filename=<optimized > out>, > result=<optimized out>) at ./linker_if.h:180 > #32 linker_load_file (filename=<optimized out>, result=<optimized > out>) > at /freebsd/src/sys/kern/kern_linker.c:447 > #33 linker_load_module (kldname=<optimized out>, > modname=0xfffff8000612b000 "amdgpu", parent=<optimized out>, > verinfo=<optimized out>, lfpp=<optimized out>) > at /freebsd/src/sys/kern/kern_linker.c:2110 > #34 0xffffffff80bb3f2d in kern_kldload (td=<optimized out>, > file=<optimized out>, fileid=0xfffffe00dd81d964) > at /freebsd/src/sys/kern/kern_linker.c:1089 > #35 0xffffffff80bb406b in sys_kldload (td=0xfffff800125d8000, > uap=<optimized out>) at > /freebsd/src/sys/kern/kern_linker.c:1115 > #36 0xffffffff8105e973 in syscallenter (td=0xfffff800125d8000) > at /freebsd/src/sys/amd64/amd64/../../kern/subr_syscall.c:144 > #37 amd64_syscall (td=0xfffff800125d8000, traced=0) > at /freebsd/src/sys/amd64/amd64/trap.c:1162 > #38 <signal handler called> > #39 0x00000008002d1cda in ?? () > Backtrace stopped: Cannot access memory at address 0x7fffffffd748 > (kgdb) > -- Mateusz Guzik <mjguzik gmail.com>Received on Sun Oct 13 2019 - 12:37:39 UTC
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