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hjfs: fix potential deadlock in putloc()

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cinap_lenrek 2012-11-16 19:55:58 +01:00
parent b9bf9f1d54
commit 84ddc4cd4b
1 changed files with 6 additions and 0 deletions
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6
sys/src/cmd/hjfs/fs1.c
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@ -428,11 +428,17 @@ putloc(Fs *fs, Loc *l, int loop)
while(loop && l != nil && l->ref <= 1){ while(loop && l != nil && l->ref <= 1){
freeit: freeit:
if((l->flags & LGONE) != 0){ if((l->flags & LGONE) != 0){
/*
* safe to unlock here, the file is gone and
* we'r the last reference.
*/
qunlock(&fs->loctree);
b = getbuf(fs->d, l->blk, TDENTRY, 0); b = getbuf(fs->d, l->blk, TDENTRY, 0);
if(b != nil){ if(b != nil){
delete(fs, l, b); delete(fs, l, b);
putbuf(b); putbuf(b);
} }
qlock(&fs->loctree);
} }
l->cnext->cprev = l->cprev; l->cnext->cprev = l->cprev;
l->cprev->cnext = l->cnext; l->cprev->cnext = l->cnext;