MengEn eff5c3174b netfilter: x_tables: Use correct memory barriers. ... [upstream commit]: 175e476b8cdf2a4de7432583b49c871345e4f8a1 [upstream commit]: cc00bcaa589914096edef7fb87ca5cee4a166b5c [upstream commit]: d3d40f237480abf3268956daf18cdc56edd32834 When a new table value was assigned, it was followed by a write memory barrier. This ensured that all writes before this point would complete before any writes after this point. However, to determine whether the rules are unused, the sequence counter is read. To ensure that all writes have been done before these reads, a full memory barrier is needed, not just a write memory barrier. The same argument applies when incrementing the counter, before the rules are read. Changing to using smp_mb() instead of smp_wmb() fixes the kernel panic reported in cc00bcaa5899 (which is still present), while still maintaining the same speed of replacing tables. The smb_mb() barriers potentially slow the packet path, however testing has shown no measurable change in performance on a 4-core MIPS64 platform. Fixes: 7f5c6d4f665b ("netfilter: get rid of atomic ops in fast path") Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>		2021-04-19 06:16:11 +00:00
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acpi	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
asm-generic	arm64: implement ftrace with regs by using patchable-function-entry	2020-01-02 12:14:57 +08:00
clocksource	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
crypto	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
drm	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
dt-bindings	arm/myimx6q: init config for myimx6q	2020-01-02 14:50:57 +08:00
keys	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
kvm	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
linux	netfilter: x_tables: Use correct memory barriers.	2021-04-19 06:16:11 +00:00
math-emu	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
media	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
memory	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
misc	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
net	Introduce ipvs_mode to share ipvs service and connection between net namespace	2020-09-08 00:42:25 +08:00
pcmcia	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
ras	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
rdma	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
scsi	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
soc	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
sound	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
target	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
trace	ext4: optimize the calculation of inode prealloc-list length	2020-09-11 14:22:55 +08:00
uapi	virtblk: print useful info for timeout scenario	2020-12-25 15:38:30 +08:00
video	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00
xen	Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces	2020-01-02 10:51:04 +08:00