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| author | Soheil Hassas Yeganeh <[email protected]> | 2018-06-09 02:47:10 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2018-06-10 21:12:50 +0000 |
| commit | 867f816badc01e6da655028810d468c9f935b37c (patch) | |
| tree | 8638841a4e39647569a24e5021bfa45586c90a3b /net/tls/tls_main.c | |
| parent | net: phy: dp83822: use BMCR_ANENABLE instead of BMSR_ANEGCAPABLE for DP83620 (diff) | |
| download | kernel-867f816badc01e6da655028810d468c9f935b37c.tar.gz kernel-867f816badc01e6da655028810d468c9f935b37c.zip | |
tcp: limit sk_rcvlowat by the maximum receive buffer
The user-provided value to setsockopt(SO_RCVLOWAT) can be
larger than the maximum possible receive buffer. Such values
mute POLLIN signals on the socket which can stall progress
on the socket.
Limit the user-provided value to half of the maximum receive
buffer, i.e., half of sk_rcvbuf when the receive buffer size
is set by the user, or otherwise half of sysctl_tcp_rmem[2].
Fixes: d1361840f8c5 ("tcp: fix SO_RCVLOWAT and RCVBUF autotuning")
Signed-off-by: Soheil Hassas Yeganeh <[email protected]>
Signed-off-by: Eric Dumazet <[email protected]>
Reviewed-by: Neal Cardwell <[email protected]>
Acked-by: Willem de Bruijn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'net/tls/tls_main.c')
0 files changed, 0 insertions, 0 deletions