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checkpatch advises that WARN_ON and recovery code are preferred over
BUG_ON which crashes the kernel.
l2tp_ppp.c's BUG_ON checks of the l2tp session structure's "magic" field
occur in code paths where it's reasonably easy to recover:
* In the case of pppol2tp_sock_to_session, we can return NULL and the
caller will bail out appropriately. There is no change required to
any of the callsites of this function since they already handle
pppol2tp_sock_to_session returning NULL.
* In the case of pppol2tp_session_destruct we can just avoid
decrementing the reference count on the suspect session structure.
In the worst case scenario this results in a memory leak, which is
preferable to a crash.
Convert these uses of BUG_ON to WARN_ON accordingly.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1aa646ac71