[Bug 217708] panic: pfs_add_node() homonymous siblings in sys/fs/pseudofs/pseudofs.c

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217708

--- Comment #1 from Dave Cottlehuber <dch at skunkwerks.at> ---
root at akai /u/o/u/s/s/GENERIC#  kgdb kernel.debug /var/crash/vmcore.last 
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Unread portion of the kernel message buffer:
[327] vt_kms_postswitch() at vt_kms_postswitch+0x52/frame 0xfffffe0464f80430
[327] vt_window_switch() at vt_window_switch+0xdb/frame 0xfffffe0464f80470
[327] vtterm_cngrab() at vtterm_cngrab+0x20/frame 0xfffffe0464f80490
[327] cngrab() at cngrab+0x32/frame 0xfffffe0464f804b0
[327] vpanic() at vpanic+0x10a/frame 0xfffffe0464f80530
[327] kassert_panic() at kassert_panic+0x126/frame 0xfffffe0464f805a0
[327] pfs_add_node() at pfs_add_node+0x114/frame 0xfffffe0464f805d0
[327] pfs_create_link() at pfs_create_link+0xc5/frame 0xfffffe0464f80620
[327] linprocfs_dirfill() at linprocfs_dirfill+0x9c/frame 0xfffffe0464f80680
[327] pfs_iterate() at pfs_iterate+0x251/frame 0xfffffe0464f806f0
[327] Dumping 1034 out of 16254 MB: (CTRL-C to abort)
..2%..11%..21%..31%..41%..52%..61%..72%..81%..92%

...
Loaded symbols for /boot/kernel/debugfs.ko
#0  doadump (textdump=0) at pcpu.h:232
232             __asm("movq %%gs:%1,%0" : "=r" (td)

(kgdb) list
227     static __inline __pure2 struct thread *
228     __curthread(void)
229     {
230             struct thread *td;
231     
232             __asm("movq %%gs:%1,%0" : "=r" (td)
233                 : "m" (*(char *)OFFSETOF_CURTHREAD));
234             return (td);
235     }
236     #ifdef __clang__
Current language:  auto; currently minimal

up

#1  0xffffffff83ef3697 in vt_kms_postswitch (arg=<value optimized out>) at
/usr/src/sys/modules/drm/drm/../../../dev/drm/linux_fb.c:80


I had to stop here as my source was already pulled for building a new kernel..

I'll finish that and re-try this very repeatable crash.

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