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authorTom Herbert <tom@quantonium.net>2018-01-24 12:35:41 -0800
committerDavid S. Miller <davem@davemloft.net>2018-01-24 15:54:30 -0500
commite5571240236c5652f3e079b1d5866716a7ad819c (patch)
tree1541ccbaf77a4b034f515865927e175bb7e00bc0 /crypto/des_generic.c
parent581e7226a5d43f629eb6399a121f85f6a15f81be (diff)
downloadlinux-e5571240236c5652f3e079b1d5866716a7ad819c.tar.bz2
kcm: Check if sk_user_data already set in kcm_attach
This is needed to prevent sk_user_data being overwritten. The check is done under the callback lock. This should prevent a socket from being attached twice to a KCM mux. It also prevents a socket from being attached for other use cases of sk_user_data as long as the other cases set sk_user_data under the lock. Followup work is needed to unify all the use cases of sk_user_data to use the same locking. Reported-by: syzbot+114b15f2be420a8886c3@syzkaller.appspotmail.com Fixes: ab7ac4eb9832 ("kcm: Kernel Connection Multiplexor module") Signed-off-by: Tom Herbert <tom@quantonium.net> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'crypto/des_generic.c')
0 files changed, 0 insertions, 0 deletions