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| author | Guillaume Nault <gnault@redhat.com> | 2019-12-06 12:38:49 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-12-06 21:05:14 -0800 |
| commit | 721c8dafad26ccfa90ff659ee19755e3377b829d (patch) | |
| tree | 725d07517fb3ffada269bee3a5c69861c6a831c8 /block | |
| parent | cb44a08f8647fd2e8db5cc9ac27cd8355fa392d8 (diff) | |
| download | linux-721c8dafad26ccfa90ff659ee19755e3377b829d.tar.bz2 | |
tcp: Protect accesses to .ts_recent_stamp with {READ,WRITE}_ONCE()
Syncookies borrow the ->rx_opt.ts_recent_stamp field to store the
timestamp of the last synflood. Protect them with READ_ONCE() and
WRITE_ONCE() since reads and writes aren't serialised.
Use of .rx_opt.ts_recent_stamp for storing the synflood timestamp was
introduced by a0f82f64e269 ("syncookies: remove last_synq_overflow from
struct tcp_sock"). But unprotected accesses were already there when
timestamp was stored in .last_synq_overflow.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions