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openEuler Kernel SIG双周例会
by openEuler conference 01 Nov '22

01 Nov '22

您好！ Kernel SIG 邀请您参加 2022-11-04 14:00 召开的Zoom会议(自动录制) 会议主题：openEuler Kernel SIG双周例会会议内容： 1.进展update 2.议题征集中欢迎大家积极申报议题~（新增议题可以回复邮件反馈，或者录入会议看板）会议链接：https://us06web.zoom.us/j/87646118604?pwd=Q3doR3VOQW4zRm51QjZHZzBJcldYUT09 会议纪要：https://etherpad.openeuler.org/p/Kernel-meetings 温馨提醒：建议接入会议后修改参会人的姓名，也可以使用您在gitee.com的ID 更多资讯尽在：https://openeuler.org/zh/ Hello! openEuler Kernel SIG invites you to attend the Zoom conference(auto recording) will be held at 2022-11-04 14:00, The subject of the conference is openEuler Kernel SIG双周例会, Summary: 1.进展update 2.议题征集中欢迎大家积极申报议题~（新增议题可以回复邮件反馈，或者录入会议看板） You can join the meeting at https://us06web.zoom.us/j/87646118604?pwd=Q3doR3VOQW4zRm51QjZHZzBJcldYUT09. Add topics at https://etherpad.openeuler.org/p/Kernel-meetings. Note: You are advised to change the participant name after joining the conference or use your ID at gitee.com. More information: https://openeuler.org/en/

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[PATCH openEuler-1.0-LTS] scsi: stex: Properly zero out the passthrough command structure
by Yongqiang Liu 31 Oct '22

31 Oct '22

From: Linus Torvalds <torvalds(a)linux-foundation.org> stable inclusion from stable-v4.19.262 commit a99c5e38dc6c3dc3da28489b78db09a4b9ffc8c3 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I5ROPX CVE: CVE-2022-40768 ------------------------------- commit 6022f210461fef67e6e676fd8544ca02d1bcfa7a upstream. The passthrough structure is declared off of the stack, so it needs to be set to zero before copied back to userspace to prevent any unintentional data leakage. Switch things to be statically allocated which will fill the unused fields with 0 automatically. Link: https://lore.kernel.org/r/YxrjN3OOw2HHl9tx@kroah.com Cc: stable(a)kernel.org Cc: "James E.J. Bottomley" <jejb(a)linux.ibm.com> Cc: "Martin K. Petersen" <martin.petersen(a)oracle.com> Cc: Dan Carpenter <dan.carpenter(a)oracle.com> Reported-by: hdthky <hdthky0(a)gmail.com> Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Martin K. Petersen <martin.petersen(a)oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Lu Jialin <lujialin4(a)huawei.com> Reviewed-by: GONG Ruiqi <gongruiqi1(a)huawei.com> Reviewed-by: Cai Xinchen <caixinchen1(a)huawei.com> Reviewed-by: Wang Weiyang <wangweiyang2(a)huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13(a)huawei.com> --- drivers/scsi/stex.c | 17 +++++++++-------- include/scsi/scsi_cmnd.h | 2 +- 2 files changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c index 9b20643ab49d..124a5d0ec05c 100644 --- a/drivers/scsi/stex.c +++ b/drivers/scsi/stex.c @@ -673,16 +673,17 @@ stex_queuecommand_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) return 0; case PASSTHRU_CMD: if (cmd->cmnd[1] == PASSTHRU_GET_DRVVER) { - struct st_drvver ver; + const struct st_drvver ver = { + .major = ST_VER_MAJOR, + .minor = ST_VER_MINOR, + .oem = ST_OEM, + .build = ST_BUILD_VER, + .signature[0] = PASSTHRU_SIGNATURE, + .console_id = host->max_id - 1, + .host_no = hba->host->host_no, + }; size_t cp_len = sizeof(ver); - ver.major = ST_VER_MAJOR; - ver.minor = ST_VER_MINOR; - ver.oem = ST_OEM; - ver.build = ST_BUILD_VER; - ver.signature[0] = PASSTHRU_SIGNATURE; - ver.console_id = host->max_id - 1; - ver.host_no = hba->host->host_no; cp_len = scsi_sg_copy_from_buffer(cmd, &ver, cp_len); cmd->result = sizeof(ver) == cp_len ? DID_OK << 16 | COMMAND_COMPLETE << 8 : diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 4c47157c01cc..d5ead17c9252 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -233,7 +233,7 @@ static inline struct scsi_data_buffer *scsi_out(struct scsi_cmnd *cmd) } static inline int scsi_sg_copy_from_buffer(struct scsi_cmnd *cmd, - void *buf, int buflen) + const void *buf, int buflen) { return sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, buflen); -- 2.25.1

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[Cancel] openEuler Kernel SIG双周例会
by openEuler conference 31 Oct '22

31 Oct '22

Sorry! The Zoom meeting will be held at 2022-11-04 14:00 scheduled by openEuler Kernel SIG has been cancelled.

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openEuler Kernel SIG双周例会
by openEuler conference 31 Oct '22

31 Oct '22

您好！ Kernel SIG 邀请您参加 2022-11-04 14:00 召开的Zoom会议(自动录制) 会议主题：openEuler Kernel SIG双周例会会议内容： 1. 进展update 2. 议题征集中欢迎大家积极申报议题~ 会议链接：https://us06web.zoom.us/j/88363936462?pwd=MEpPRWZKWFd2ejFWalNQQythd1JSdz09 会议纪要：https://etherpad.openeuler.org/p/Kernel-meetings 温馨提醒：建议接入会议后修改参会人的姓名，也可以使用您在gitee.com的ID 更多资讯尽在：https://openeuler.org/zh/ Hello! openEuler Kernel SIG invites you to attend the Zoom conference(auto recording) will be held at 2022-11-04 14:00, The subject of the conference is openEuler Kernel SIG双周例会, Summary: 1. 进展update 2. 议题征集中欢迎大家积极申报议题~ You can join the meeting at https://us06web.zoom.us/j/88363936462?pwd=MEpPRWZKWFd2ejFWalNQQythd1JSdz09. Add topics at https://etherpad.openeuler.org/p/Kernel-meetings. Note: You are advised to change the participant name after joining the conference or use your ID at gitee.com. More information: https://openeuler.org/en/

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[PATCH openEuler-1.0-LTS] nilfs2: fix leak of nilfs_root in case of writer thread creation failure
by Yongqiang Liu 29 Oct '22

29 Oct '22

From: Ryusuke Konishi <konishi.ryusuke(a)gmail.com> mainline inclusion from mainline-v6.1-rc1 commit d0d51a97063db4704a5ef6bc978dddab1636a306 category: bugfix bugzilla: 187884, https://gitee.com/src-openeuler/kernel/issues/I5X2OB CVE: CVE-2022-3646 -------------------------------- If nilfs_attach_log_writer() failed to create a log writer thread, it frees a data structure of the log writer without any cleanup. After commit e912a5b66837 ("nilfs2: use root object to get ifile"), this causes a leak of struct nilfs_root, which started to leak an ifile metadata inode and a kobject on that struct. In addition, if the kernel is booted with panic_on_warn, the above ifile metadata inode leak will cause the following panic when the nilfs2 kernel module is removed: kmem_cache_destroy nilfs2_inode_cache: Slab cache still has objects when called from nilfs_destroy_cachep+0x16/0x3a [nilfs2] WARNING: CPU: 8 PID: 1464 at mm/slab_common.c:494 kmem_cache_destroy+0x138/0x140 ... RIP: 0010:kmem_cache_destroy+0x138/0x140 Code: 00 20 00 00 e8 a9 55 d8 ff e9 76 ff ff ff 48 8b 53 60 48 c7 c6 20 70 65 86 48 c7 c7 d8 69 9c 86 48 8b 4c 24 28 e8 ef 71 c7 00 <0f> 0b e9 53 ff ff ff c3 48 81 ff ff 0f 00 00 77 03 31 c0 c3 53 48 ... Call Trace: <TASK> ? nilfs_palloc_freev.cold.24+0x58/0x58 [nilfs2] nilfs_destroy_cachep+0x16/0x3a [nilfs2] exit_nilfs_fs+0xa/0x1b [nilfs2] __x64_sys_delete_module+0x1d9/0x3a0 ? __sanitizer_cov_trace_pc+0x1a/0x50 ? syscall_trace_enter.isra.19+0x119/0x190 do_syscall_64+0x34/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd ... </TASK> Kernel panic - not syncing: panic_on_warn set ... This patch fixes these issues by calling nilfs_detach_log_writer() cleanup function if spawning the log writer thread fails. Link: https://lkml.kernel.org/r/20221007085226.57667-1-konishi.ryusuke@gmail.com Fixes: e912a5b66837 ("nilfs2: use root object to get ifile") Signed-off-by: Ryusuke Konishi <konishi.ryusuke(a)gmail.com> Reported-by: syzbot+7381dc4ad60658ca4c05(a)syzkaller.appspotmail.com Tested-by: Ryusuke Konishi <konishi.ryusuke(a)gmail.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> Conflict: fs/nilfs2/segment.c Signed-off-by: Baokun Li <libaokun1(a)huawei.com> Reviewed-by: Zhang Yi <yi.zhang(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13(a)huawei.com> --- fs/nilfs2/segment.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index 445eef41bfaf..2104be29417b 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -2781,10 +2781,9 @@ int nilfs_attach_log_writer(struct super_block *sb, struct nilfs_root *root) return -ENOMEM; err = nilfs_segctor_start_thread(nilfs->ns_writer); - if (err) { - kfree(nilfs->ns_writer); - nilfs->ns_writer = NULL; - } + if (unlikely(err)) + nilfs_detach_log_writer(sb); + return err; } -- 2.25.1

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[PATCH openEuler-1.0-LTS] vsock: Fix memory leak in vsock_connect()
by Yongqiang Liu 29 Oct '22

29 Oct '22

From: Peilin Ye <peilin.ye(a)bytedance.com> stable inclusion from stable-v4.19.256 commit 2fc2a7767f661e6083f69588718cdf6f07cb9330 category: bugfix bugzilla: 187891, https://gitee.com/src-openeuler/kernel/issues/I5WYLL CVE: CVE-2022-3629 -------------------------------- commit 7e97cfed9929eaabc41829c395eb0d1350fccb9d upstream. An O_NONBLOCK vsock_connect() request may try to reschedule @connect_work. Imagine the following sequence of vsock_connect() requests: 1. The 1st, non-blocking request schedules @connect_work, which will expire after 200 jiffies. Socket state is now SS_CONNECTING; 2. Later, the 2nd, blocking request gets interrupted by a signal after a few jiffies while waiting for the connection to be established. Socket state is back to SS_UNCONNECTED, but @connect_work is still pending, and will expire after 100 jiffies. 3. Now, the 3rd, non-blocking request tries to schedule @connect_work again. Since @connect_work is already scheduled, schedule_delayed_work() silently returns. sock_hold() is called twice, but sock_put() will only be called once in vsock_connect_timeout(), causing a memory leak reported by syzbot: BUG: memory leak unreferenced object 0xffff88810ea56a40 (size 1232): comm "syz-executor756", pid 3604, jiffies 4294947681 (age 12.350s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 28 00 07 40 00 00 00 00 00 00 00 00 00 00 00 00 (..@............ backtrace: [<ffffffff837c830e>] sk_prot_alloc+0x3e/0x1b0 net/core/sock.c:1930 [<ffffffff837cbe22>] sk_alloc+0x32/0x2e0 net/core/sock.c:1989 [<ffffffff842ccf68>] __vsock_create.constprop.0+0x38/0x320 net/vmw_vsock/af_vsock.c:734 [<ffffffff842ce8f1>] vsock_create+0xc1/0x2d0 net/vmw_vsock/af_vsock.c:2203 [<ffffffff837c0cbb>] __sock_create+0x1ab/0x2b0 net/socket.c:1468 [<ffffffff837c3acf>] sock_create net/socket.c:1519 [inline] [<ffffffff837c3acf>] __sys_socket+0x6f/0x140 net/socket.c:1561 [<ffffffff837c3bba>] __do_sys_socket net/socket.c:1570 [inline] [<ffffffff837c3bba>] __se_sys_socket net/socket.c:1568 [inline] [<ffffffff837c3bba>] __x64_sys_socket+0x1a/0x20 net/socket.c:1568 [<ffffffff84512815>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84512815>] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 [<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae <...> Use mod_delayed_work() instead: if @connect_work is already scheduled, reschedule it, and undo sock_hold() to keep the reference count balanced. Reported-and-tested-by: syzbot+b03f55bf128f9a38f064(a)syzkaller.appspotmail.com Fixes: d021c344051a ("VSOCK: Introduce VM Sockets") Co-developed-by: Stefano Garzarella <sgarzare(a)redhat.com> Signed-off-by: Stefano Garzarella <sgarzare(a)redhat.com> Reviewed-by: Stefano Garzarella <sgarzare(a)redhat.com> Signed-off-by: Peilin Ye <peilin.ye(a)bytedance.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Dong Chenchen <dongchenchen2(a)huawei.com> Reviewed-by: Yue Haibing <yuehaibing(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13(a)huawei.com> --- net/vmw_vsock/af_vsock.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index 4f9a0635d723..ed715ccca9a9 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -1213,7 +1213,14 @@ static int vsock_stream_connect(struct socket *sock, struct sockaddr *addr, * timeout fires. */ sock_hold(sk); - schedule_delayed_work(&vsk->connect_work, timeout); + + /* If the timeout function is already scheduled, + * reschedule it, then ungrab the socket refcount to + * keep it balanced. + */ + if (mod_delayed_work(system_wq, &vsk->connect_work, + timeout)) + sock_put(sk); /* Skip ahead to preserve error code set above. */ goto out_wait; -- 2.25.1

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[PATCH OLK-5.10 00/39] sharepool: Update patches from hulk
by Wang Wensheng 28 Oct '22

28 Oct '22

This patch set contains code optimizations and bugfixes for the sharepool. Chen Jun (5): sharepool: Make the definitions of MMAP_SHARE_POOL_{START|16G_START} more readable sharepool: Rename sp_mapping.flag to sp_mapping.type sharepool: replace spg->{dvpp|normal} with spg->mapping[SP_MAPPING_{DVPP|NORMAL}] sharepool: Extract sp_mapping_find sharepool: Support alloc ro mapping Guo Mengqi (14): mm: sharepool: remove deprecated interfaces mm: sharepool: proc_sp_group_state bugfix mm: sharepool: fix dvpp spm redundant print error mm: sharepool: fix statistics error mm: sharepool: fix static code-check errors mm: sharepool: delete redundant codes mm: sharepool: fix softlockup in high pressure use case. mm: sharepool: fix deadlock in spa_stat_of_mapping_show mm: sharepool: fix deadlock in sp_check_mmap_addr mm: sharepool: delete unused codes mm: sharepool: fix potential AA deadlock mm: sharepool: check size=0 in mg_sp_make_share_k2u() mm: sharepool: fix hugepage_rsvd count increase error Fix sharepool hugepage cgroup uncount error. Wang Wensheng (3): mm/sharepool: Delete unused sysctl interface mm/sharepool: Fix UAF reported by KASAN mm/sharepool: Rebind the numa node when fallback to normal pages Zhang Zekun (11): mm: sharepool: Remove unused sp_dev_va_start and sp_dev_va_size mm: sharepool: Remove sp_device_number_detect function mm: sharepool: Remove enable_mdc_default_group and change the definition of is_process_in_group() mm: sharepool: Remove the comment and fix a bug in mg_sp_group_id_by_pid() mm: sharepool: Add a read lock in proc_usage_show() mm: share_pool: Fix CodeCheck2.0 static warning Fix CodeCheck2.0 static check warning Fix the broken logic in mg_sp_group_add_task() Renaming __insert_sp_area to insert_sp_area Renaming __find_sp_area_locked to find_sp_area_locked Use space instead of tap before '*normal' and '*dvpp' Zhou Guanghui (6): mm/share pool: delete unnecessary judgment mm/share pool: Avoid UAF on spa mm/share pool: Check the maximum value of spg_id mm/share pool: Avoid UAF on mm mm/sharepool: bugfix for 2M U2K mm/share pool: fix the incorrect judgement of the addr range fs/hugetlbfs/inode.c | 19 +- include/linux/hugetlb.h | 6 +- include/linux/share_pool.h | 168 ++----- kernel/sysctl.c | 67 --- mm/hugetlb.c | 3 + mm/share_pool.c | 882 +++++++++++++------------------------ 6 files changed, 363 insertions(+), 782 deletions(-) -- 2.17.1

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[PATCH openEuler-1.0-LTS 1/2] sch_sfb: Don't assume the skb is still around after enqueueing to child
by Yongqiang Liu 27 Oct '22

27 Oct '22

From: Toke Høiland-Jørgensen <toke(a)toke.dk> stable inclusion from stable-v4.19.258 commit 9245ed20950afe225bc6d1c4b9d28d55aa152e25 category: bugfix bugzilla: 187862, https://gitee.com/src-openeuler/kernel/issues/I5WF14 CVE: CVE-2022-3586 -------------------------------- [ Upstream commit 9efd23297cca530bb35e1848665805d3fcdd7889 ] The sch_sfb enqueue() routine assumes the skb is still alive after it has been enqueued into a child qdisc, using the data in the skb cb field in the increment_qlen() routine after enqueue. However, the skb may in fact have been freed, causing a use-after-free in this case. In particular, this happens if sch_cake is used as a child of sfb, and the GSO splitting mode of CAKE is enabled (in which case the skb will be split into segments and the original skb freed). Fix this by copying the sfb cb data to the stack before enqueueing the skb, and using this stack copy in increment_qlen() instead of the skb pointer itself. Reported-by: zdi-disclosures(a)trendmicro.com # ZDI-CAN-18231 Fixes: e13e02a3c68d ("net_sched: SFB flow scheduler") Signed-off-by: Toke Høiland-Jørgensen <toke(a)toke.dk> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Guo Mengqi <guomengqi3(a)huawei.com> Reviewed-by: chenweilong <chenweilong(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13(a)huawei.com> --- net/sched/sch_sfb.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/net/sched/sch_sfb.c b/net/sched/sch_sfb.c index 1aa95e761671..5e237f978075 100644 --- a/net/sched/sch_sfb.c +++ b/net/sched/sch_sfb.c @@ -139,15 +139,15 @@ static void increment_one_qlen(u32 sfbhash, u32 slot, struct sfb_sched_data *q) } } -static void increment_qlen(const struct sk_buff *skb, struct sfb_sched_data *q) +static void increment_qlen(const struct sfb_skb_cb *cb, struct sfb_sched_data *q) { u32 sfbhash; - sfbhash = sfb_hash(skb, 0); + sfbhash = cb->hashes[0]; if (sfbhash) increment_one_qlen(sfbhash, 0, q); - sfbhash = sfb_hash(skb, 1); + sfbhash = cb->hashes[1]; if (sfbhash) increment_one_qlen(sfbhash, 1, q); } @@ -287,6 +287,7 @@ static int sfb_enqueue(struct sk_buff *skb, struct Qdisc *sch, struct sfb_sched_data *q = qdisc_priv(sch); struct Qdisc *child = q->qdisc; struct tcf_proto *fl; + struct sfb_skb_cb cb; int i; u32 p_min = ~0; u32 minqlen = ~0; @@ -403,11 +404,12 @@ static int sfb_enqueue(struct sk_buff *skb, struct Qdisc *sch, } enqueue: + memcpy(&cb, sfb_skb_cb(skb), sizeof(cb)); ret = qdisc_enqueue(skb, child, to_free); if (likely(ret == NET_XMIT_SUCCESS)) { qdisc_qstats_backlog_inc(sch, skb); sch->q.qlen++; - increment_qlen(skb, q); + increment_qlen(&cb, q); } else if (net_xmit_drop_count(ret)) { q->stats.childdrop++; qdisc_qstats_drop(sch); -- 2.25.1

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[PATCH openEuler-1.0-LTS 1/4] inet: factor out inet_send_prepare()
by Yongqiang Liu 27 Oct '22

27 Oct '22

From: Paolo Abeni <pabeni(a)redhat.com> mainline inclusion from mainline-v5.3-rc1 commit e473093639945cb0a07ad4d51d5fd3fc3c3708cf category: bugfix bugzilla: 187846, https://gitee.com/src-openeuler/kernel/issues/I5W7YP CVE: CVE-2022-3567 --------------------------- The same code is replicated verbatim in multiple places, and the next patches will introduce an additional user for it. Factor out a helper and use it where appropriate. No functional change intended. Signed-off-by: Paolo Abeni <pabeni(a)redhat.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Xu Jia <xujia39(a)huawei.com> Reviewed-by: Yue Haibing <yuehaibing(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13(a)huawei.com> --- include/net/inet_common.h | 1 + net/ipv4/af_inet.c | 21 +++++++++++++-------- 2 files changed, 14 insertions(+), 8 deletions(-) diff --git a/include/net/inet_common.h b/include/net/inet_common.h index 3ca969cbd161..4c2a6b175b34 100644 --- a/include/net/inet_common.h +++ b/include/net/inet_common.h @@ -23,6 +23,7 @@ int inet_dgram_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags); int inet_accept(struct socket *sock, struct socket *newsock, int flags, bool kern); +int inet_send_prepare(struct sock *sk); int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size); ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags); diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index ba716480f2f1..d526dd68589d 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -784,10 +784,8 @@ int inet_getname(struct socket *sock, struct sockaddr *uaddr, } EXPORT_SYMBOL(inet_getname); -int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) +int inet_send_prepare(struct sock *sk) { - struct sock *sk = sock->sk; - sock_rps_record_flow(sk); /* We may need to bind the socket. */ @@ -795,6 +793,17 @@ int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) inet_autobind(sk)) return -EAGAIN; + return 0; +} +EXPORT_SYMBOL_GPL(inet_send_prepare); + +int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) +{ + struct sock *sk = sock->sk; + + if (unlikely(inet_send_prepare(sk))) + return -EAGAIN; + return sk->sk_prot->sendmsg(sk, msg, size); } EXPORT_SYMBOL(inet_sendmsg); @@ -804,11 +813,7 @@ ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset, { struct sock *sk = sock->sk; - sock_rps_record_flow(sk); - - /* We may need to bind the socket. */ - if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind && - inet_autobind(sk)) + if (unlikely(inet_send_prepare(sk))) return -EAGAIN; if (sk->sk_prot->sendpage) -- 2.25.1

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[PATCH openEuler-5.10 01/53] ubifs: Rectify space budget for ubifs_symlink() if symlink is encrypted
by Zheng Zengkai 27 Oct '22

27 Oct '22

From: Zhihao Cheng <chengzhihao1(a)huawei.com> hulk inclusion category: bugfix bugzilla: 187685, https://gitee.com/openeuler/kernel/issues/I5VVZX CVE: NA -------------------------------- Fix bad space budget when symlink file is encrypted. Bad space budget may let make_reservation() return with -ENOSPC, which could turn ubifs to read-only mode in do_writepage() process. Fetch a reproducer in [Link]. Link: https://bugzilla.kernel.org/show_bug.cgi?id=216490 Fixes: ca7f85be8d6cf9 ("ubifs: Add support for encrypted symlinks") Signed-off-by: Zhihao Cheng <chengzhihao1(a)huawei.com> Reviewed-by: Zhang Yi <yi.zhang(a)huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai(a)huawei.com> --- fs/ubifs/dir.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c index acd7e83a35e4..647a47ade5bd 100644 --- a/fs/ubifs/dir.c +++ b/fs/ubifs/dir.c @@ -1148,7 +1148,6 @@ static int ubifs_symlink(struct inode *dir, struct dentry *dentry, int err, sz_change, len = strlen(symname); struct fscrypt_str disk_link; struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1, - .new_ino_d = ALIGN(len, 8), .dirtied_ino = 1 }; struct fscrypt_name nm; @@ -1164,6 +1163,7 @@ static int ubifs_symlink(struct inode *dir, struct dentry *dentry, * Budget request settings: new inode, new direntry and changing parent * directory inode. */ + req.new_ino_d = ALIGN(disk_link.len - 1, 8); err = ubifs_budget_space(c, &req); if (err) return err; -- 2.20.1

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