linux/include
Eric Dumazet 04c494e68a Revert "tcp/dccp: get rid of inet_twsk_purge()"
This reverts commits:

0dad4087a8 ("tcp/dccp: get rid of inet_twsk_purge()")
d507204d3c ("tcp/dccp: add tw->tw_bslot")

As Leonard pointed out, a newly allocated netns can happen
to reuse a freed 'struct net'.

While TCP TW timers were covered by my patches, other things were not:

1) Lookups in rx path (INET_MATCH() and INET6_MATCH()), as they look
  at 4-tuple plus the 'struct net' pointer.

2) /proc/net/tcp[6] and inet_diag, same reason.

3) hashinfo->bhash[], same reason.

Fixing all this seems risky, lets instead revert.

In the future, we might have a per netns tcp hash table, or
a per netns list of timewait sockets...

Fixes: 0dad4087a8 ("tcp/dccp: get rid of inet_twsk_purge()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Leonard Crestez <cdleonard@gmail.com>
Tested-by: Leonard Crestez <cdleonard@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2022-05-13 12:24:12 +01:00
..
acpi ACPI: bus: Eliminate acpi_bus_get_device() 2022-04-05 19:49:26 +02:00
asm-generic bug: Have __warn() prototype defined unconditionally 2022-04-26 10:59:57 +02:00
clocksource
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2022-03-21 16:02:36 -07:00
drm
dt-bindings dt-bindings: clk: mpfs: add defines for two new clocks 2022-04-22 18:40:15 -07:00
keys
kunit
kvm
linux Networking fixes for 5.18-rc7, including fixes from wireless, 2022-05-12 11:51:45 -07:00
math-emu
media
memory memory: renesas-rpc-if: Fix HF/OSPI data transfer in Manual Mode 2022-04-21 17:00:24 +02:00
misc
net Revert "tcp/dccp: get rid of inet_twsk_purge()" 2022-05-13 12:24:12 +01:00
pcmcia
ras mm/memory-failure.c: fix race with changing page compound again 2022-03-22 15:57:07 -07:00
rdma
scsi scsi: iscsi: Fix NOP handling during conn recovery 2022-04-11 22:09:35 -04:00
soc net: mscc: ocelot: mark traps with a bool instead of keeping them in a list 2022-05-05 19:15:14 -07:00
sound ASoC: Fixes for v5.18 2022-04-19 17:26:01 +02:00
target
trace NFSD bug fixes for 5.18-rc: 2022-04-12 14:23:19 -10:00
uapi Networking fixes for 5.18-rc7, including fixes from wireless, 2022-05-12 11:51:45 -07:00
vdso
video
xen