Messages in this thread Patch in this message | | | From | Alexander Mikhalitsyn <> | Subject | [PATCH 2/2] ipc: WARN if trying to remove ipc object which is absent | Date | Tue, 6 Jul 2021 16:22:59 +0300 |
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Lets produce a warning if we trying to remove non-existing IPC object from IPC namespace kht/idr structures.
This allows to catch possible bugs when ipc_rmid() function was called with inconsistent struct ipc_ids*, struct kern_ipc_perm* arguments.
Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Milton Miller <miltonm@bga.com> Cc: Jack Miller <millerjo@us.ibm.com> Cc: Pavel Tikhomirov <ptikhomirov@virtuozzo.com> Cc: Alexander Mikhalitsyn <alexander@mihalicyn.com> Signed-off-by: Alexander Mikhalitsyn <alexander.mikhalitsyn@virtuozzo.com> --- ipc/util.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/ipc/util.c b/ipc/util.c index 0027e47626b7..45bb8ce6c42c 100644 --- a/ipc/util.c +++ b/ipc/util.c @@ -447,8 +447,8 @@ static int ipcget_public(struct ipc_namespace *ns, struct ipc_ids *ids, static void ipc_kht_remove(struct ipc_ids *ids, struct kern_ipc_perm *ipcp) { if (ipcp->key != IPC_PRIVATE) - rhashtable_remove_fast(&ids->key_ht, &ipcp->khtnode, - ipc_kht_params); + WARN_ON(rhashtable_remove_fast(&ids->key_ht, &ipcp->khtnode, + ipc_kht_params)); } /** @@ -498,7 +498,7 @@ void ipc_rmid(struct ipc_ids *ids, struct kern_ipc_perm *ipcp) { int idx = ipcid_to_idx(ipcp->id); - idr_remove(&ids->ipcs_idr, idx); + WARN_ON(idr_remove(&ids->ipcs_idr, idx) != ipcp); ipc_kht_remove(ids, ipcp); ids->in_use--; ipcp->deleted = true; -- 2.31.1
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