[PATCH] Race in coda_readdir()

Alexander Viro (viro@math.psu.edu)
Fri, 19 Feb 1999 02:28:52 -0500 (EST)

coda_readdir() calls ->readdir() method of caching object without
holding the semaphore on it. Patch below is against 2.2.2-pre5.

--- linux/fs/coda/dir.c Tue Feb 16 11:53:48 1999
+++ linux/fs/coda/dir.c.new Fri Feb 19 02:20:50 1999
@@ -637,7 +637,9 @@
result = coda_venus_readdir(&open_file, dirent, filldir);
} else {
/* potemkin case: we are handed a directory inode */
+ down(&cnp->ovp->i_sem);
result = open_file.f_op->readdir(&open_file, dirent, filldir);
+ up(&cnp->ovp->i_sem);
}
coda_restore_codafile(inode, file, cnp->c_ovp, &open_file);
EXIT;

Cheers,
Al

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