Re: kern/45833: Occasional crash of 5.99.59: SPL NOT LOWERED ON TRAP EXIT

[coypu%sdf.org@localhost]

The following reply was made to PR kern/45833; it has been noted by GNATS.

From: coypu%sdf.org@localhost
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/45833: Occasional crash of 5.99.59: SPL NOT LOWERED ON TRAP
 EXIT
Date: Tue, 6 Jun 2017 03:22:20 +0000

 Extracting useful information out of this PR...
 
  :        p
  rocfs_do_pid_stat() at :     :  
     
      
  :      :    
  :     :  n etb s d :
  roc fs _do_p id_st at 
  +x131
  :        
     :  :  p   ro 
  c
  s _rw()  a t    :     
  
  netbsd:procsrw: +: x d5
  _( at: :      
  netbsd:_+x37
 
  :        
  vn_read() at :        
 
  :      net bs d:
  vn_read+x94
  :        
  dofileread() at ::        
       6  0
  netbsd:dofileread+x8f
  sys_read() at :        
  :   :       
  : ne tbs d:sys _r ead  x5 f0
  syscall() at :        
  netbsd:syscall+x15b
  - --- syscall (number 3) ---
  7f7ff73a8fa:
  cpu4: nd traceback...
 
 I believe this might be the bug where repeatedly reading from procfs
 would eventually reach a null deref. I filed it before and had trouble
 reproducing it recently (before 8 branch).