DragonFlyBSD

Bug #1831

Updated by tuxillo almost 2 years ago

I was able to reproduce with a hammer equivalent of issue1726 with the following 
 
 test case from vsrinivas in issue1726: 

 <pre> 
 <code class="c"> 
 

 #include <unistd.h> 
 
 #include <stdlib.h> 
 
 #include <stdio.h> 

 

 main() { 
         
         int i; 
         
         char id[320] = {}; 

         

         for (i = 0; i < 10000000; i++) { 
                 
                 sprintf(id, "%09d", i); 
                 
                 link("sin.c", id); 
         
         } 

         

         return 0; 
 
 } 

 </code> 
 </pre> 

 
 ---- 
 <pre> 

 


 (kgdb) bt 
 
 #0    _get_mycpu (di=0xc06d4ca0) at ./machine/thread.h:83 
 
 #1    md_dumpsys (di=0xc06d4ca0) 
     
     at /usr/src/sys/platform/pc32/i386/dump_machdep.c:263 
 
 #2    0xc0304d15 in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:880 
 
 #3    0xc03052d5 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:387 
 
 #4    0xc030559e in panic (fmt=0xc05bb41b "%s: malloc limit exceeded") 
     
     at /usr/src/sys/kern/kern_shutdown.c:786 
 
 #5    0xc03032bb in kmalloc (size=25, type=0xc1d8f590, flags=258) 
     
     at /usr/src/sys/kern/kern_slaballoc.c:503 
 
 #6    0xc04aa5a3 in hammer_alloc_mem_record (ip=0xcb803d50, data_len=25) 
     
     at /usr/src/sys/vfs/hammer/hammer_object.c:280 
 
 #7    0xc04aa91f in hammer_ip_add_directory (trans=0xce350ad4,  
      
     dip=0xcb803d50, name=0xd3cdb1d0 "000452457", bytes=9, ip=0xce31df50) 
     
     at /usr/src/sys/vfs/hammer/hammer_object.c:666 
 
 #8    0xc04bbf8a in hammer_vop_nlink (ap=0xce350b2c) 
     
     at /usr/src/sys/vfs/hammer/hammer_vnops.c:1388 
 
 #9    0xc036cc1f in vop_nlink_ap (ap=0xce350b2c) 
     
     at /usr/src/sys/kern/vfs_vopops.c:1978 
 
 #10 0xc03717ca in null_nlink (ap=0xce350b2c) 
     
     at /usr/src/sys/vfs/nullfs/null_vnops.c:164 
 
 #11 0xc036d465 in vop_nlink (ops=0xcdbbe030, nch=0xce350c48,  
      
     dvp=0xce0913e8, vp=0xce2f04e8, cred=0xcdef1738) 
     
     at /usr/src/sys/kern/vfs_vopops.c:1397 
 
 ---Type <return> to continue, or q <return> to quit---  
  
 ---Type <return> to continue, or q <return> to quit---#12 0xc0365496 in 
 
 kern_link (nd=0xce350c80, linknd=0xce350c48) 
     
     at /usr/src/sys/kern/vfs_syscalls.c:2320 
 
 #13 0xc036ad49 in sys_link (uap=0xce350cf0) 
     
     at /usr/src/sys/kern/vfs_syscalls.c:2345 
 
 #14 0xc055f6b3 in syscall2 (frame=0xce350d40) 
     
     at /usr/src/sys/platform/pc32/i386/trap.c:1310 
 
 #15 0xc0547fb6 in Xint0x80_syscall () 
     
     at /usr/src/sys/platform/pc32/i386/exception.s:876 
 
 #16 0x0000001f in ?? () 
 
 Backtrace stopped: previous frame inner to this frame (corrupt stack?) 
 
 (kgdb)  

 </pre> 

  


 Dump on my leaf account; 
 
 http://leaf.dragonflybsd.org/~evocallaghan/hammer_vfs_panic.7z 

 

 Cheers, 
 
 Edward.

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