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Avoid stack overwrite in zfs_setattr_dir() 

The bulk[] array index, count, must be reset per-iteration in order to
not overwrite the stack.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Chris Dunlop <chris@onthe.net.au>
Reviewed-by: Tom Caputi <tcaputi@datto.com>
Signed-off-by: Tim Chase <tim@chase2k.com>
Closes #8072
Closes #8597
Closes #8601
This commit is contained in:
Tim Chase 2019-04-10 17:38:21 -05:00 committed by Brian Behlendorf
parent 5ae4e4481e
commit 8cb34421e0
1 changed files with 2 additions and 1 deletions
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3
module/zfs/zfs_vnops.c
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@ -2710,11 +2710,12 @@ zfs_setattr_dir(znode_t *dzp)
dmu_tx_t *tx = NULL;
uint64_t uid, gid;
sa_bulk_attr_t bulk[4];
int count = 0;
int count;
int err;
zap_cursor_init(&zc, os, dzp->z_id);
while ((err = zap_cursor_retrieve(&zc, &zap)) == 0) {
count = 0;
if (zap.za_integer_length != 8 || zap.za_num_integers != 1) {
err = ENXIO;
break;