June 2024 - Kernel - mailweb.openeuler.org

[PATCH openEuler-1.0-LTS] scsi: megaraid_sas: Fix resource leak in case of probe failure
by Luo Gengkun 03 Jun '24

03 Jun '24

From: Chandrakanth Patil <chandrakanth.patil(a)broadcom.com> mainline inclusion from mainline-v5.14-rc1 commit b5438f48fdd8e1c3f130d32637511efd32038152 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9RQ71 CVE: CVE-2021-47329 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- The driver doesn't clean up all the allocated resources properly when scsi_add_host(), megasas_start_aen() function fails during the PCI device probe. Clean up all those resources. Link: https://lore.kernel.org/r/20210528131307.25683-3-chandrakanth.patil@broadco… Signed-off-by: Chandrakanth Patil <chandrakanth.patil(a)broadcom.com> Signed-off-by: Sumit Saxena <sumit.saxena(a)broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen(a)oracle.com> Conflicts: drivers/scsi/megaraid/megaraid_sas_base.c Signed-off-by: Luo Gengkun <luogengkun2(a)huawei.com> --- drivers/scsi/megaraid/megaraid_sas_base.c | 10 ++++++++++ drivers/scsi/megaraid/megaraid_sas_fusion.c | 1 + 2 files changed, 11 insertions(+) diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index 3f0752dc8ab5..b993b79ed38f 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -6620,11 +6620,16 @@ static int megasas_probe_one(struct pci_dev *pdev, return 0; fail_start_aen: + instance->unload = 1; + scsi_remove_host(instance->host); fail_io_attach: megasas_mgmt_info.count--; megasas_mgmt_info.max_index--; megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL; + if (instance->requestorId && !instance->skip_heartbeat_timer_del) + del_timer_sync(&instance->sriov_heartbeat_timer); + instance->instancet->disable_intr(instance); megasas_destroy_irqs(instance); @@ -6632,8 +6637,13 @@ static int megasas_probe_one(struct pci_dev *pdev, megasas_release_fusion(instance); else megasas_release_mfi(instance); + if (instance->msix_vectors) pci_free_irq_vectors(instance->pdev); + instance->msix_vectors = 0; + + if (instance->fw_crash_state != UNAVAILABLE) + megasas_free_host_crash_buffer(instance); fail_init_mfi: scsi_host_put(host); fail_alloc_instance: diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index f45c54f02bfa..9d4941cb961b 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -4857,6 +4857,7 @@ megasas_alloc_fusion_context(struct megasas_instance *instance) if (!fusion->log_to_span) { dev_err(&instance->pdev->dev, "Failed from %s %d\n", __func__, __LINE__); + kfree(instance->ctrl_context); return -ENOMEM; } } -- 2.34.1

2 1

[PATCH openEuler-1.0-LTS v2 0/8] Fix hugetlb deadlock
by Jinjiang Tu 03 Jun '24

03 Jun '24

Fix hugetlb deadlock. Changelog since v1: * remove unnecessary semicolon. * update commit message. Jinjiang Tu (2): Revert "hugetlbfs: fix hugetlbfs_statfs() locking" Revert "hugetlb: make free_huge_page irq safe" Mike Kravetz (4): hugetlb: create remove_hugetlb_page() to separate functionality hugetlb: call update_and_free_page without hugetlb_lock hugetlb: change free_pool_huge_page to remove_pool_huge_page hugetlb: make free_huge_page irq safe Mina Almasry (1): hugetlbfs: fix hugetlbfs_statfs() locking Naoya Horiguchi (1): hugetlb: pass head page to remove_hugetlb_page() mm/hugetlb.c | 183 ++++++++++++++++++++++++++++++++------------------- 1 file changed, 116 insertions(+), 67 deletions(-) -- 2.25.1

2 9

[PATCH OLK-6.6 0/1] Fix vf init and common user permissions issue
by Shuai Wu 03 Jun '24

03 Jun '24

Modify hrn3 dev file permissions to support common users use the RDMA API. Fixes: 5bc8dbb5fdf5 ("infiniband/hw/hiroce3: Add Huawei Intelligent Network Card RDMA Driver") Shuai Wu (1): net/ethernet/huawei/hiroce3: Fix vf init and common user permissions issue drivers/infiniband/hw/hiroce3/roce.h | 2 +- drivers/infiniband/hw/hiroce3/roce_main.c | 2 +- drivers/net/ethernet/huawei/hinic3/hw/hinic3_pci_id_tbl.h | 1 + 3 files changed, 3 insertions(+), 2 deletions(-) -- 2.33.0

2 2

[PATCH openEuler-22.03-LTS-SP1] scsi: lpfc: Release hbalock before calling lpfc_worker_wake_up()
by Ye Bin 03 Jun '24

03 Jun '24

From: Justin Tee <justin.tee(a)broadcom.com> mainline inclusion from mainline-v6.9-rc2 commit ded20192dff31c91cef2a04f7e20e60e9bb887d3 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9U211 CVE: CVE-2024-36924 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- lpfc_worker_wake_up() calls the lpfc_work_done() routine, which takes the hbalock. Thus, lpfc_worker_wake_up() should not be called while holding the hbalock to avoid potential deadlock. Signed-off-by: Justin Tee <justin.tee(a)broadcom.com> Link: https://lore.kernel.org/r/20240305200503.57317-7-justintee8345@gmail.com Signed-off-by: Martin K. Petersen <martin.petersen(a)oracle.com> Conflicts: drivers/scsi/lpfc/lpfc_hbadisc.c [fix context diff] Signed-off-by: Ye Bin <yebin(a)huaweicloud.com> --- drivers/scsi/lpfc/lpfc_els.c | 20 ++++++++++---------- drivers/scsi/lpfc/lpfc_hbadisc.c | 2 ++ drivers/scsi/lpfc/lpfc_sli.c | 14 +++++++------- 3 files changed, 19 insertions(+), 17 deletions(-) diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c index 387b0cd1ea18..deb9202307a9 100644 --- a/drivers/scsi/lpfc/lpfc_els.c +++ b/drivers/scsi/lpfc/lpfc_els.c @@ -3636,23 +3636,23 @@ lpfc_els_retry_delay(struct timer_list *t) unsigned long flags; struct lpfc_work_evt *evtp = &ndlp->els_retry_evt; + /* Hold a node reference for outstanding queued work */ + if (!lpfc_nlp_get(ndlp)) + return; + spin_lock_irqsave(&phba->hbalock, flags); if (!list_empty(&evtp->evt_listp)) { spin_unlock_irqrestore(&phba->hbalock, flags); + lpfc_nlp_put(ndlp); return; } - /* We need to hold the node by incrementing the reference - * count until the queued work is done - */ - evtp->evt_arg1 = lpfc_nlp_get(ndlp); - if (evtp->evt_arg1) { - evtp->evt = LPFC_EVT_ELS_RETRY; - list_add_tail(&evtp->evt_listp, &phba->work_list); - lpfc_worker_wake_up(phba); - } + evtp->evt_arg1 = ndlp; + evtp->evt = LPFC_EVT_ELS_RETRY; + list_add_tail(&evtp->evt_listp, &phba->work_list); spin_unlock_irqrestore(&phba->hbalock, flags); - return; + + lpfc_worker_wake_up(phba); } /** diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c index 68ff233f936e..d1f28364356e 100644 --- a/drivers/scsi/lpfc/lpfc_hbadisc.c +++ b/drivers/scsi/lpfc/lpfc_hbadisc.c @@ -184,7 +184,9 @@ lpfc_dev_loss_tmo_callbk(struct fc_rport *rport) if (evtp->evt_arg1) { evtp->evt = LPFC_EVT_DEV_LOSS; list_add_tail(&evtp->evt_listp, &phba->work_list); + spin_unlock_irqrestore(&phba->hbalock, iflags); lpfc_worker_wake_up(phba); + return; } spin_unlock_irqrestore(&phba->hbalock, iflags); diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 755d68b98160..28fee498a3d2 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -1100,9 +1100,9 @@ lpfc_set_rrq_active(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp, empty = list_empty(&phba->active_rrq_list); list_add_tail(&rrq->list, &phba->active_rrq_list); phba->hba_flag |= HBA_RRQ_ACTIVE; + spin_unlock_irqrestore(&phba->hbalock, iflags); if (empty) lpfc_worker_wake_up(phba); - spin_unlock_irqrestore(&phba->hbalock, iflags); return 0; out: spin_unlock_irqrestore(&phba->hbalock, iflags); @@ -10379,18 +10379,18 @@ lpfc_sli_post_recovery_event(struct lpfc_hba *phba, unsigned long iflags; struct lpfc_work_evt *evtp = &ndlp->recovery_evt; + /* Hold a node reference for outstanding queued work */ + if (!lpfc_nlp_get(ndlp)) + return; + spin_lock_irqsave(&phba->hbalock, iflags); if (!list_empty(&evtp->evt_listp)) { spin_unlock_irqrestore(&phba->hbalock, iflags); + lpfc_nlp_put(ndlp); return; } - /* Incrementing the reference count until the queued work is done. */ - evtp->evt_arg1 = lpfc_nlp_get(ndlp); - if (!evtp->evt_arg1) { - spin_unlock_irqrestore(&phba->hbalock, iflags); - return; - } + evtp->evt_arg1 = ndlp; evtp->evt = LPFC_EVT_RECOVER_PORT; list_add_tail(&evtp->evt_listp, &phba->work_list); spin_unlock_irqrestore(&phba->hbalock, iflags); -- 2.31.1

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[PATCH OLK-5.10] scsi: lpfc: Release hbalock before calling lpfc_worker_wake_up()
by Ye Bin 03 Jun '24

03 Jun '24

From: Justin Tee <justin.tee(a)broadcom.com> mainline inclusion from mainline-v6.9-rc2 commit ded20192dff31c91cef2a04f7e20e60e9bb887d3 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9U211 CVE: CVE-2024-36924 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- lpfc_worker_wake_up() calls the lpfc_work_done() routine, which takes the hbalock. Thus, lpfc_worker_wake_up() should not be called while holding the hbalock to avoid potential deadlock. Signed-off-by: Justin Tee <justin.tee(a)broadcom.com> Link: https://lore.kernel.org/r/20240305200503.57317-7-justintee8345@gmail.com Signed-off-by: Martin K. Petersen <martin.petersen(a)oracle.com> Conflicts: drivers/scsi/lpfc/lpfc_hbadisc.c [fix context diff] Signed-off-by: Ye Bin <yebin(a)huaweicloud.com> --- drivers/scsi/lpfc/lpfc_els.c | 20 ++++++++++---------- drivers/scsi/lpfc/lpfc_hbadisc.c | 2 ++ drivers/scsi/lpfc/lpfc_sli.c | 14 +++++++------- 3 files changed, 19 insertions(+), 17 deletions(-) diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c index 387b0cd1ea18..deb9202307a9 100644 --- a/drivers/scsi/lpfc/lpfc_els.c +++ b/drivers/scsi/lpfc/lpfc_els.c @@ -3636,23 +3636,23 @@ lpfc_els_retry_delay(struct timer_list *t) unsigned long flags; struct lpfc_work_evt *evtp = &ndlp->els_retry_evt; + /* Hold a node reference for outstanding queued work */ + if (!lpfc_nlp_get(ndlp)) + return; + spin_lock_irqsave(&phba->hbalock, flags); if (!list_empty(&evtp->evt_listp)) { spin_unlock_irqrestore(&phba->hbalock, flags); + lpfc_nlp_put(ndlp); return; } - /* We need to hold the node by incrementing the reference - * count until the queued work is done - */ - evtp->evt_arg1 = lpfc_nlp_get(ndlp); - if (evtp->evt_arg1) { - evtp->evt = LPFC_EVT_ELS_RETRY; - list_add_tail(&evtp->evt_listp, &phba->work_list); - lpfc_worker_wake_up(phba); - } + evtp->evt_arg1 = ndlp; + evtp->evt = LPFC_EVT_ELS_RETRY; + list_add_tail(&evtp->evt_listp, &phba->work_list); spin_unlock_irqrestore(&phba->hbalock, flags); - return; + + lpfc_worker_wake_up(phba); } /** diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c index 3ff76ca147a5..cfca1352ef70 100644 --- a/drivers/scsi/lpfc/lpfc_hbadisc.c +++ b/drivers/scsi/lpfc/lpfc_hbadisc.c @@ -184,7 +184,9 @@ lpfc_dev_loss_tmo_callbk(struct fc_rport *rport) if (evtp->evt_arg1) { evtp->evt = LPFC_EVT_DEV_LOSS; list_add_tail(&evtp->evt_listp, &phba->work_list); + spin_unlock_irqrestore(&phba->hbalock, iflags); lpfc_worker_wake_up(phba); + return; } spin_unlock_irqrestore(&phba->hbalock, iflags); diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 923ceaba0bf3..9dd7edbbb556 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -1100,9 +1100,9 @@ lpfc_set_rrq_active(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp, empty = list_empty(&phba->active_rrq_list); list_add_tail(&rrq->list, &phba->active_rrq_list); phba->hba_flag |= HBA_RRQ_ACTIVE; + spin_unlock_irqrestore(&phba->hbalock, iflags); if (empty) lpfc_worker_wake_up(phba); - spin_unlock_irqrestore(&phba->hbalock, iflags); return 0; out: spin_unlock_irqrestore(&phba->hbalock, iflags); @@ -10379,18 +10379,18 @@ lpfc_sli_post_recovery_event(struct lpfc_hba *phba, unsigned long iflags; struct lpfc_work_evt *evtp = &ndlp->recovery_evt; + /* Hold a node reference for outstanding queued work */ + if (!lpfc_nlp_get(ndlp)) + return; + spin_lock_irqsave(&phba->hbalock, iflags); if (!list_empty(&evtp->evt_listp)) { spin_unlock_irqrestore(&phba->hbalock, iflags); + lpfc_nlp_put(ndlp); return; } - /* Incrementing the reference count until the queued work is done. */ - evtp->evt_arg1 = lpfc_nlp_get(ndlp); - if (!evtp->evt_arg1) { - spin_unlock_irqrestore(&phba->hbalock, iflags); - return; - } + evtp->evt_arg1 = ndlp; evtp->evt = LPFC_EVT_RECOVER_PORT; list_add_tail(&evtp->evt_listp, &phba->work_list); spin_unlock_irqrestore(&phba->hbalock, iflags); -- 2.31.1

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[PATCH openEuler-1.0-LTS] arm64: asm-bug: Add .align 2 to the end of __BUG_ENTRY
by Li Zetao 03 Jun '24

03 Jun '24

From: Jiangfeng Xiao <xiaojiangfeng(a)huawei.com> mainline inclusion from mainline-v6.10-rc1 commit ffbf4fb9b5c12ff878a10ea17997147ea4ebea6f category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I9R0VC CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- When CONFIG_DEBUG_BUGVERBOSE=n, we fail to add necessary padding bytes to bug_table entries, and as a result the last entry in a bug table will be ignored, potentially leading to an unexpected panic(). All prior entries in the table will be handled correctly. The arm64 ABI requires that struct fields of up to 8 bytes are naturally-aligned, with padding added within a struct such that struct are suitably aligned within arrays. When CONFIG_DEBUG_BUGVERPOSE=y, the layout of a bug_entry is: struct bug_entry { signed int bug_addr_disp; // 4 bytes signed int file_disp; // 4 bytes unsigned short line; // 2 bytes unsigned short flags; // 2 bytes } ... with 12 bytes total, requiring 4-byte alignment. When CONFIG_DEBUG_BUGVERBOSE=n, the layout of a bug_entry is: struct bug_entry { signed int bug_addr_disp; // 4 bytes unsigned short flags; // 2 bytes < implicit padding > // 2 bytes } ... with 8 bytes total, with 6 bytes of data and 2 bytes of trailing padding, requiring 4-byte alginment. When we create a bug_entry in assembly, we align the start of the entry to 4 bytes, which implicitly handles padding for any prior entries. However, we do not align the end of the entry, and so when CONFIG_DEBUG_BUGVERBOSE=n, the final entry lacks the trailing padding bytes. For the main kernel image this is not a problem as find_bug() doesn't depend on the trailing padding bytes when searching for entries: for (bug = __start___bug_table; bug < __stop___bug_table; ++bug) if (bugaddr == bug_addr(bug)) return bug; However for modules, module_bug_finalize() depends on the trailing bytes when calculating the number of entries: mod->num_bugs = sechdrs[i].sh_size / sizeof(struct bug_entry); ... and as the last bug_entry lacks the necessary padding bytes, this entry will not be counted, e.g. in the case of a single entry: sechdrs[i].sh_size == 6 sizeof(struct bug_entry) == 8; sechdrs[i].sh_size / sizeof(struct bug_entry) == 0; Consequently module_find_bug() will miss the last bug_entry when it does: for (i = 0; i < mod->num_bugs; ++i, ++bug) if (bugaddr == bug_addr(bug)) goto out; ... which can lead to a kenrel panic due to an unhandled bug. This can be demonstrated with the following module: static int __init buginit(void) { WARN(1, "hello\n"); return 0; } static void __exit bugexit(void) { } module_init(buginit); module_exit(bugexit); MODULE_LICENSE("GPL"); ... which will trigger a kernel panic when loaded: ------------[ cut here ]------------ hello Unexpected kernel BRK exception at EL1 Internal error: BRK handler: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: hello(O+) CPU: 0 PID: 50 Comm: insmod Tainted: G O 6.9.1 #8 Hardware name: linux,dummy-virt (DT) pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : buginit+0x18/0x1000 [hello] lr : buginit+0x18/0x1000 [hello] sp : ffff800080533ae0 x29: ffff800080533ae0 x28: 0000000000000000 x27: 0000000000000000 x26: ffffaba8c4e70510 x25: ffff800080533c30 x24: ffffaba8c4a28a58 x23: 0000000000000000 x22: 0000000000000000 x21: ffff3947c0eab3c0 x20: ffffaba8c4e3f000 x19: ffffaba846464000 x18: 0000000000000006 x17: 0000000000000000 x16: ffffaba8c2492834 x15: 0720072007200720 x14: 0720072007200720 x13: ffffaba8c49b27c8 x12: 0000000000000312 x11: 0000000000000106 x10: ffffaba8c4a0a7c8 x9 : ffffaba8c49b27c8 x8 : 00000000ffffefff x7 : ffffaba8c4a0a7c8 x6 : 80000000fffff000 x5 : 0000000000000107 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff3947c0eab3c0 Call trace: buginit+0x18/0x1000 [hello] do_one_initcall+0x80/0x1c8 do_init_module+0x60/0x218 load_module+0x1ba4/0x1d70 __do_sys_init_module+0x198/0x1d0 __arm64_sys_init_module+0x1c/0x28 invoke_syscall+0x48/0x114 el0_svc_common.constprop.0+0x40/0xe0 do_el0_svc+0x1c/0x28 el0_svc+0x34/0xd8 el0t_64_sync_handler+0x120/0x12c el0t_64_sync+0x190/0x194 Code: d0ffffe0 910003fd 91000000 9400000b (d4210000) ---[ end trace 0000000000000000 ]--- Kernel panic - not syncing: BRK handler: Fatal exception Fix this by always aligning the end of a bug_entry to 4 bytes, which is correct regardless of CONFIG_DEBUG_BUGVERBOSE. Fixes: 9fb7410f955f ("arm64/BUG: Use BRK instruction for generic BUG traps") Signed-off-by: Yuanbin Xie <xieyuanbin1(a)huawei.com> Signed-off-by: Jiangfeng Xiao <xiaojiangfeng(a)huawei.com> Reviewed-by: Mark Rutland <mark.rutland(a)arm.com> Link: https://lore.kernel.org/r/1716212077-43826-1-git-send-email-xiaojiangfeng@h… Signed-off-by: Will Deacon <will(a)kernel.org> Conflicts: arch/arm64/include/asm/asm-bug.h [The conflict occurs because the commit 69505e3d9a39a("bug: Use normal relative pointers in 'struct bug_entry'") is not merged] Signed-off-by: Li Zetao <lizetao1(a)huawei.com> --- arch/arm64/include/asm/asm-bug.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/include/asm/asm-bug.h b/arch/arm64/include/asm/asm-bug.h index b3552c4a405f..04e5be18acb1 100644 --- a/arch/arm64/include/asm/asm-bug.h +++ b/arch/arm64/include/asm/asm-bug.h @@ -39,6 +39,7 @@ 14470: .long 14471f - 14470b; \ _BUGVERBOSE_LOCATION(__FILE__, __LINE__) \ .short flags; \ + .align 2; \ .popsection; \ 14471: #else -- 2.34.1

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[PATCH openEuler-1.0-LTS 0/1] arch related major bugfix patch
by Liao Chen 03 Jun '24

03 Jun '24

arch related major bugfix patch before 2024 D Scott Phillips (1): arm64: sdei: abort running SDEI handlers during crash arch/arm64/include/asm/sdei.h | 6 ++++++ arch/arm64/kernel/entry.S | 28 +++++++++++++++++++++++++++- arch/arm64/kernel/sdei.c | 3 +++ arch/arm64/kernel/smp.c | 8 ++++---- drivers/firmware/arm_sdei.c | 19 +++++++++++++++++++ include/linux/arm_sdei.h | 2 ++ 6 files changed, 61 insertions(+), 5 deletions(-) -- 2.34.1

2 2

[PATCH openEuler-1.0-LTS] smb: client: fix use-after-free bug in cifs_debug_data_proc_show()
by Wang Zhaolong 03 Jun '24

03 Jun '24

From: Paulo Alcantara <pc(a)manguebit.com> mainline inclusion from mainline-v6.7-rc1 commit d328c09ee9f15ee5a26431f5aad7c9239fa85e62 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9R4LM CVE: CVE-2023-52752 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- Skip SMB sessions that are being teared down (e.g. @ses->ses_status == SES_EXITING) in cifs_debug_data_proc_show() to avoid use-after-free in @ses. This fixes the following GPF when reading from /proc/fs/cifs/DebugData while mounting and umounting [ 816.251274] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b6d81: 0000 [#1] PREEMPT SMP NOPTI ... [ 816.260138] Call Trace: [ 816.260329] <TASK> [ 816.260499] ? die_addr+0x36/0x90 [ 816.260762] ? exc_general_protection+0x1b3/0x410 [ 816.261126] ? asm_exc_general_protection+0x26/0x30 [ 816.261502] ? cifs_debug_tcon+0xbd/0x240 [cifs] [ 816.261878] ? cifs_debug_tcon+0xab/0x240 [cifs] [ 816.262249] cifs_debug_data_proc_show+0x516/0xdb0 [cifs] [ 816.262689] ? seq_read_iter+0x379/0x470 [ 816.262995] seq_read_iter+0x118/0x470 [ 816.263291] proc_reg_read_iter+0x53/0x90 [ 816.263596] ? srso_alias_return_thunk+0x5/0x7f [ 816.263945] vfs_read+0x201/0x350 [ 816.264211] ksys_read+0x75/0x100 [ 816.264472] do_syscall_64+0x3f/0x90 [ 816.264750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 816.265135] RIP: 0033:0x7fd5e669d381 Cc: stable(a)vger.kernel.org Signed-off-by: Paulo Alcantara (SUSE) <pc(a)manguebit.com> Signed-off-by: Steve French <stfrench(a)microsoft.com> Conflicts: fs/cifs/cifs_debug.c Signed-off-by: Wang Zhaolong <wangzhaolong1(a)huawei.com> --- fs/cifs/cifs_debug.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c index a85aeff90df8..afe61b2e10be 100644 --- a/fs/cifs/cifs_debug.c +++ b/fs/cifs/cifs_debug.c @@ -285,6 +285,8 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v) i++; list_for_each(tmp2, &server->smb_ses_list) { + if (ses->status == CifsExiting) + continue; ses = list_entry(tmp2, struct cifs_ses, smb_ses_list); if ((ses->serverDomain == NULL) || -- 2.34.3

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[PATCH V2 OLK-5.10 0/2] Fix soft lockup in stress test
by Zhang Zekun 03 Jun '24

03 Jun '24

speed up the speed of freeing iova and add a cond_resched(). v2: add a cover letter to generate a pr Zhang Zekun (2): iommu/iova: free iovas on each cpu in flush queue iommu/iova: Try to schedule out when free iova too long drivers/iommu/iova.c | 41 +++++++++++++++++++++++++---------------- 1 file changed, 25 insertions(+), 16 deletions(-) -- 2.17.1

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[PATCH OLK-5.10 1/2] iommu/iova: free iovas on each cpu in flush queue
by Zhang Zekun 03 Jun '24

03 Jun '24

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I9SOOM --------------------------------- The iova free logic in flush queue always try to free iova on the cpu who trigger the timer callback function, which does not fully utilizing the capability of cpu rcache in iova_rcache. Always free iovas on each cpu who free the iova can speed up the speed of freeing iova and better utilzing the capalibity of cpu_rcache. Signed-off-by: Zhang Zekun <zhangzekun11(a)huawei.com> --- drivers/iommu/iova.c | 40 ++++++++++++++++++++++++---------------- 1 file changed, 24 insertions(+), 16 deletions(-) diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c index dec7634f35fa..f3c5b0e887ce 100644 --- a/drivers/iommu/iova.c +++ b/drivers/iommu/iova.c @@ -18,7 +18,7 @@ static bool iova_rcache_insert(struct iova_domain *iovad, unsigned long pfn, - unsigned long size); + unsigned long size, int cpu); static unsigned long iova_rcache_get(struct iova_domain *iovad, unsigned long size, unsigned long limit_pfn); @@ -77,7 +77,7 @@ static void free_iova_flush_queue(struct iova_domain *iovad) iovad->entry_dtor = NULL; } -static void fq_ring_free(struct iova_domain *iovad, struct iova_fq *fq); +static void fq_ring_free(struct iova_domain *iovad, struct iova_fq *fq, int cpu); static void free_iova_work_func(struct work_struct *work) { struct iova_domain *iovad; @@ -90,7 +90,7 @@ static void free_iova_work_func(struct work_struct *work) fq = per_cpu_ptr(iovad->fq, cpu); spin_lock_irqsave(&fq->lock, flags); - fq_ring_free(iovad, fq); + fq_ring_free(iovad, fq, cpu); spin_unlock_irqrestore(&fq->lock, flags); } } @@ -459,6 +459,15 @@ alloc_iova_fast(struct iova_domain *iovad, unsigned long size, } EXPORT_SYMBOL_GPL(alloc_iova_fast); +static void +free_iova_fast_internal(struct iova_domain *iovad, unsigned long pfn, unsigned long size, int cpu) +{ + if (iova_rcache_insert(iovad, pfn, size, cpu)) + return; + + free_iova(iovad, pfn); +} + /** * free_iova_fast - free iova pfn range into rcache * @iovad: - iova domain in question. @@ -470,13 +479,11 @@ EXPORT_SYMBOL_GPL(alloc_iova_fast); void free_iova_fast(struct iova_domain *iovad, unsigned long pfn, unsigned long size) { - if (iova_rcache_insert(iovad, pfn, size)) - return; - - free_iova(iovad, pfn); + free_iova_fast_internal(iovad, pfn, size, smp_processor_id()); } EXPORT_SYMBOL_GPL(free_iova_fast); + #define fq_ring_for_each(i, fq) \ for ((i) = (fq)->head; (i) != (fq)->tail; (i) = ((i) + 1) % IOVA_FQ_SIZE) @@ -497,7 +504,7 @@ static inline unsigned fq_ring_add(struct iova_fq *fq) return idx; } -static void fq_ring_free(struct iova_domain *iovad, struct iova_fq *fq) +static void fq_ring_free(struct iova_domain *iovad, struct iova_fq *fq, int cpu) { u64 counter = atomic64_read(&iovad->fq_flush_finish_cnt); unsigned idx; @@ -512,9 +519,9 @@ static void fq_ring_free(struct iova_domain *iovad, struct iova_fq *fq) if (iovad->entry_dtor) iovad->entry_dtor(fq->entries[idx].data); - free_iova_fast(iovad, + free_iova_fast_internal(iovad, fq->entries[idx].iova_pfn, - fq->entries[idx].pages); + fq->entries[idx].pages, cpu); fq->head = (fq->head + 1) % IOVA_FQ_SIZE; } @@ -565,6 +572,7 @@ void queue_iova(struct iova_domain *iovad, struct iova_fq *fq = raw_cpu_ptr(iovad->fq); unsigned long flags; unsigned idx; + int cpu = smp_processor_id(); /* * Order against the IOMMU driver's pagetable update from unmapping @@ -580,11 +588,11 @@ void queue_iova(struct iova_domain *iovad, * flushed out on another CPU. This makes the fq_full() check below less * likely to be true. */ - fq_ring_free(iovad, fq); + fq_ring_free(iovad, fq, cpu); if (fq_full(fq)) { iova_domain_flush(iovad); - fq_ring_free(iovad, fq); + fq_ring_free(iovad, fq, cpu); } idx = fq_ring_add(fq); @@ -957,13 +965,13 @@ static void init_iova_rcaches(struct iova_domain *iovad) */ static bool __iova_rcache_insert(struct iova_domain *iovad, struct iova_rcache *rcache, - unsigned long iova_pfn) + unsigned long iova_pfn, int cpu) { struct iova_cpu_rcache *cpu_rcache; bool can_insert = false; unsigned long flags; - cpu_rcache = raw_cpu_ptr(rcache->cpu_rcaches); + cpu_rcache = per_cpu_ptr(rcache->cpu_rcaches, cpu); spin_lock_irqsave(&cpu_rcache->lock, flags); if (!iova_magazine_full(cpu_rcache->loaded)) { @@ -994,14 +1002,14 @@ static bool __iova_rcache_insert(struct iova_domain *iovad, } static bool iova_rcache_insert(struct iova_domain *iovad, unsigned long pfn, - unsigned long size) + unsigned long size, int cpu) { unsigned int log_size = order_base_2(size); if (log_size >= IOVA_RANGE_CACHE_MAX_SIZE) return false; - return __iova_rcache_insert(iovad, &iovad->rcaches[log_size], pfn); + return __iova_rcache_insert(iovad, &iovad->rcaches[log_size], pfn, cpu); } /* -- 2.17.1

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