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(parent: 773e0c4) | patch
afs: Fix missing lock when replacing VL server list
authorDavid Howells <dhowells@redhat.com>
Tue, 7 May 2019 14:16:26 +0000 (15:16 +0100)
committerDavid Howells <dhowells@redhat.com>
Wed, 15 May 2019 16:35:53 +0000 (17:35 +0100)
commit6b8812fc8ec28c13c09c89f88ce3958f19238838
tree9cbdfed7205a1b2255706b1293893639b1122ba4tree | snapshot
parent773e0c40253443e0ce5491cb0e414b62f7cc45edcommit | diff
afs: Fix missing lock when replacing VL server list

When afs_update_cell() replaces the cell->vl_servers list, it uses RCU
protocol so that proc is protected, but doesn't take ->vl_servers_lock to
protect afs_start_vl_iteration() (which does actually take a shared lock).

Fix this by making afs_update_cell() take an exclusive lock when replacing
->vl_servers.

Fixes: 0a5143f2f89c ("afs: Implement VL server rotation")
Signed-off-by: David Howells <dhowells@redhat.com>
fs/afs/cell.c diff | blob | history
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