[PATCH openEuler-5.10 1/2] block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern
From: Haimin Zhang <tcs.kernel@gmail.com> mainline inclusion from mainline-v5.17-rc5 commit cc8f7fe1f5eab010191aa4570f27641876fa1267 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I4Z2IA CVE: CVE-2022-0494 -------------------------------- Add __GFP_ZERO flag for alloc_page in function bio_copy_kern to initialize the buffer of a bio. Signed-off-by: Haimin Zhang <tcs.kernel@gmail.com> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20220216084038.15635-1-tcs.kernel@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk> Conflict: commit ce288e053568 ("block: remove BLK_BOUNCE_ISA support") is not backported. Signed-off-by: Yu Kuai <yukuai3@huawei.com> Reviewed-by: Jason Yan <yanaijie@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- block/blk-map.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/blk-map.c b/block/blk-map.c index 21630dccac62..ede73f4f7014 100644 --- a/block/blk-map.c +++ b/block/blk-map.c @@ -488,7 +488,7 @@ static struct bio *bio_copy_kern(struct request_queue *q, void *data, if (bytes > len) bytes = len; - page = alloc_page(q->bounce_gfp | gfp_mask); + page = alloc_page(q->bounce_gfp | __GFP_ZERO | gfp_mask); if (!page) goto cleanup; -- 2.20.1
From: Eric Dumazet <edumazet@google.com> mainline inclusion from mainline-v5.16-rc4 commit 59f09ae8fac4a990070fc6bdc889d0e0118664ea category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I4Z2Z9 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... ------------------------------- This trivial function is called ~90,000 times on 256 cpus hosts, when reading /proc/net/netstat. And this number keeps inflating. Inlining it saves many cycles. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Cao Wangbao <caowangbao@huawei.com> Reviewed-by: Wu Changye <wuchangye@huawei.com> Reviewed-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- include/net/ip.h | 6 +++++- net/ipv4/af_inet.c | 6 ------ 2 files changed, 5 insertions(+), 7 deletions(-) diff --git a/include/net/ip.h b/include/net/ip.h index 5538e54d4620..cf7bf5518f6b 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -291,7 +291,11 @@ void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb, #define NET_ADD_STATS(net, field, adnd) SNMP_ADD_STATS((net)->mib.net_statistics, field, adnd) #define __NET_ADD_STATS(net, field, adnd) __SNMP_ADD_STATS((net)->mib.net_statistics, field, adnd) -u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offct); +static inline u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offt) +{ + return *(((unsigned long *)per_cpu_ptr(mib, cpu)) + offt); +} + unsigned long snmp_fold_field(void __percpu *mib, int offt); #if BITS_PER_LONG==32 u64 snmp_get_cpu_field64(void __percpu *mib, int cpu, int offct, diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index ab3e34241f98..67a081b5fb83 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1666,12 +1666,6 @@ int inet_ctl_sock_create(struct sock **sk, unsigned short family, } EXPORT_SYMBOL_GPL(inet_ctl_sock_create); -u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offt) -{ - return *(((unsigned long *)per_cpu_ptr(mib, cpu)) + offt); -} -EXPORT_SYMBOL_GPL(snmp_get_cpu_field); - unsigned long snmp_fold_field(void __percpu *mib, int offt) { unsigned long res = 0; -- 2.20.1
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Zheng Zengkai