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cxgb4: avoid accessing registers when clearing filters

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[ Upstream commit 88c380df84 ]

Hardware register having the server TID base can contain
invalid values when adapter is in bad state (for example,
due to AER fatal error). Reading these invalid values in the
register can lead to out-of-bound memory access. So, fix
by using the saved server TID base when clearing filters.

Fixes: b1a79360ee ("cxgb4: Delete all hash and TCAM filters before resource cleanup")
Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Raju Rangoju 2021-05-19 16:48:31 +05:30 • committed by Greg Kroah-Hartman
commit 02f03883fd
1 changed files with 1 additions and 1 deletions
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drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c
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@ -1042,7 +1042,7 @@ void clear_all_filters(struct adapter *adapter)
cxgb4_del_filter(dev, f->tid, &f->fs);
}
sb = t4_read_reg(adapter, LE_DB_SRVR_START_INDEX_A);
sb = adapter->tids.stid_base;
for (i = 0; i < sb; i++) {
f = (struct filter_entry *)adapter->tids.tid_tab[i];