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[PATCH openEuler-1.0-LTS 1/5] genirq: Add protection against unsafe usage of generic_handle_irq()
by Yang Yingliang 24 May '21

24 May '21

From: Thomas Gleixner <tglx(a)linutronix.de> mainline inclusion from mainline-5.7 commit c16816acd08697b02a53f56f8936497a9f6f6e7a category: bugfix bugzilla: NA CVE: NA ------------------------------------------------- In general calling generic_handle_irq() with interrupts disabled from non interrupt context is harmless. For some interrupt controllers like the x86 trainwrecks this is outright dangerous as it might corrupt state if an interrupt affinity change is pending. Add infrastructure which allows to mark interrupts as unsafe and catch such usage in generic_handle_irq(). Reported-by: sathyanarayanan.kuppuswamy(a)linux.intel.com Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de> Acked-by: Marc Zyngier <maz(a)kernel.org> Link: https://lkml.kernel.org/r/20200306130623.590923677@linutronix.de Signed-off-by: Liao Chang <liaochang1(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- include/linux/irq.h | 13 +++++++++++++ kernel/irq/internals.h | 8 ++++++++ kernel/irq/irqdesc.c | 6 ++++++ kernel/irq/resend.c | 5 +++-- 4 files changed, 30 insertions(+), 2 deletions(-) diff --git a/include/linux/irq.h b/include/linux/irq.h index 014d5804c1b59..ca367d98a991e 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -210,6 +210,8 @@ struct irq_data { * IRQD_CAN_RESERVE - Can use reservation mode * IRQD_MSI_NOMASK_QUIRK - Non-maskable MSI quirk for affinity change * required + * IRQD_HANDLE_ENFORCE_IRQCTX - Enforce that handle_irq_*() is only invoked + * from actual interrupt context. * IRQD_AFFINITY_ON_ACTIVATE - Affinity is set on activation. Don't call * irq_chip::irq_set_affinity() when deactivated. */ @@ -235,6 +237,7 @@ enum { IRQD_DEFAULT_TRIGGER_SET = (1 << 25), IRQD_CAN_RESERVE = (1 << 26), IRQD_MSI_NOMASK_QUIRK = (1 << 27), + IRQD_HANDLE_ENFORCE_IRQCTX = (1 << 28), IRQD_AFFINITY_ON_ACTIVATE = (1 << 29), }; @@ -305,6 +308,16 @@ static inline bool irqd_is_single_target(struct irq_data *d) return __irqd_to_state(d) & IRQD_SINGLE_TARGET; } +static inline void irqd_set_handle_enforce_irqctx(struct irq_data *d) +{ + __irqd_to_state(d) |= IRQD_HANDLE_ENFORCE_IRQCTX; +} + +static inline bool irqd_is_handle_enforce_irqctx(struct irq_data *d) +{ + return __irqd_to_state(d) & IRQD_HANDLE_ENFORCE_IRQCTX; +} + static inline bool irqd_is_wakeup_set(struct irq_data *d) { return __irqd_to_state(d) & IRQD_WAKEUP_STATE; diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index ed4843df6220c..207bac6ad4c30 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -422,6 +422,10 @@ static inline struct cpumask *irq_desc_get_pending_mask(struct irq_desc *desc) { return desc->pending_mask; } +static inline bool handle_enforce_irqctx(struct irq_data *data) +{ + return irqd_is_handle_enforce_irqctx(data); +} bool irq_fixup_move_pending(struct irq_desc *desc, bool force_clear); #else /* CONFIG_GENERIC_PENDING_IRQ */ static inline bool irq_can_move_pcntxt(struct irq_data *data) @@ -448,6 +452,10 @@ static inline bool irq_fixup_move_pending(struct irq_desc *desc, bool fclear) { return false; } +static inline bool handle_enforce_irqctx(struct irq_data *data) +{ + return false; +} #endif /* !CONFIG_GENERIC_PENDING_IRQ */ #if !defined(CONFIG_IRQ_DOMAIN) || !defined(CONFIG_IRQ_DOMAIN_HIERARCHY) diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index dc4549fc71f95..ffdf02b01d816 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -633,9 +633,15 @@ void irq_init_desc(unsigned int irq) int generic_handle_irq(unsigned int irq) { struct irq_desc *desc = irq_to_desc(irq); + struct irq_data *data; if (!desc) return -EINVAL; + + data = irq_desc_get_irq_data(desc); + if (WARN_ON_ONCE(!in_irq() && handle_enforce_irqctx(data))) + return -EPERM; + generic_handle_irq_desc(desc); return 0; } diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c index 98c04ca5fa43d..5064b13b80d60 100644 --- a/kernel/irq/resend.c +++ b/kernel/irq/resend.c @@ -72,8 +72,9 @@ void check_irq_resend(struct irq_desc *desc) desc->istate &= ~IRQS_PENDING; desc->istate |= IRQS_REPLAY; - if (!desc->irq_data.chip->irq_retrigger || - !desc->irq_data.chip->irq_retrigger(&desc->irq_data)) { + if ((!desc->irq_data.chip->irq_retrigger || + !desc->irq_data.chip->irq_retrigger(&desc->irq_data)) && + !handle_enforce_irqctx(&desc->irq_data)) { #ifdef CONFIG_HARDIRQS_SW_RESEND unsigned int irq = irq_desc_get_irq(desc); -- 2.25.1

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[PATCH openEuler-1.0-LTS 1/5] genirq: Add protection against unsafe usage of generic_handle_irq()
by Yang Yingliang 24 May '21

24 May '21

From: Liao Chang <liaochang1(a)huawei.com> mainline inclusion from mainline-5.7 commit c16816acd08697b02a53f56f8936497a9f6f6e7a category: bugfix bugzilla: NA CVE: NA ------------------------------------------------- In general calling generic_handle_irq() with interrupts disabled from non interrupt context is harmless. For some interrupt controllers like the x86 trainwrecks this is outright dangerous as it might corrupt state if an interrupt affinity change is pending. Add infrastructure which allows to mark interrupts as unsafe and catch such usage in generic_handle_irq(). Reported-by: sathyanarayanan.kuppuswamy(a)linux.intel.com Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de> Acked-by: Marc Zyngier <maz(a)kernel.org> Link: https://lkml.kernel.org/r/20200306130623.590923677@linutronix.de Signed-off-by: Liao Chang <liaochang1(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- include/linux/irq.h | 13 +++++++++++++ kernel/irq/internals.h | 8 ++++++++ kernel/irq/irqdesc.c | 6 ++++++ kernel/irq/resend.c | 5 +++-- 4 files changed, 30 insertions(+), 2 deletions(-) diff --git a/include/linux/irq.h b/include/linux/irq.h index 014d5804c1b59..ca367d98a991e 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -210,6 +210,8 @@ struct irq_data { * IRQD_CAN_RESERVE - Can use reservation mode * IRQD_MSI_NOMASK_QUIRK - Non-maskable MSI quirk for affinity change * required + * IRQD_HANDLE_ENFORCE_IRQCTX - Enforce that handle_irq_*() is only invoked + * from actual interrupt context. * IRQD_AFFINITY_ON_ACTIVATE - Affinity is set on activation. Don't call * irq_chip::irq_set_affinity() when deactivated. */ @@ -235,6 +237,7 @@ enum { IRQD_DEFAULT_TRIGGER_SET = (1 << 25), IRQD_CAN_RESERVE = (1 << 26), IRQD_MSI_NOMASK_QUIRK = (1 << 27), + IRQD_HANDLE_ENFORCE_IRQCTX = (1 << 28), IRQD_AFFINITY_ON_ACTIVATE = (1 << 29), }; @@ -305,6 +308,16 @@ static inline bool irqd_is_single_target(struct irq_data *d) return __irqd_to_state(d) & IRQD_SINGLE_TARGET; } +static inline void irqd_set_handle_enforce_irqctx(struct irq_data *d) +{ + __irqd_to_state(d) |= IRQD_HANDLE_ENFORCE_IRQCTX; +} + +static inline bool irqd_is_handle_enforce_irqctx(struct irq_data *d) +{ + return __irqd_to_state(d) & IRQD_HANDLE_ENFORCE_IRQCTX; +} + static inline bool irqd_is_wakeup_set(struct irq_data *d) { return __irqd_to_state(d) & IRQD_WAKEUP_STATE; diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index ed4843df6220c..207bac6ad4c30 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -422,6 +422,10 @@ static inline struct cpumask *irq_desc_get_pending_mask(struct irq_desc *desc) { return desc->pending_mask; } +static inline bool handle_enforce_irqctx(struct irq_data *data) +{ + return irqd_is_handle_enforce_irqctx(data); +} bool irq_fixup_move_pending(struct irq_desc *desc, bool force_clear); #else /* CONFIG_GENERIC_PENDING_IRQ */ static inline bool irq_can_move_pcntxt(struct irq_data *data) @@ -448,6 +452,10 @@ static inline bool irq_fixup_move_pending(struct irq_desc *desc, bool fclear) { return false; } +static inline bool handle_enforce_irqctx(struct irq_data *data) +{ + return false; +} #endif /* !CONFIG_GENERIC_PENDING_IRQ */ #if !defined(CONFIG_IRQ_DOMAIN) || !defined(CONFIG_IRQ_DOMAIN_HIERARCHY) diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index dc4549fc71f95..ffdf02b01d816 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -633,9 +633,15 @@ void irq_init_desc(unsigned int irq) int generic_handle_irq(unsigned int irq) { struct irq_desc *desc = irq_to_desc(irq); + struct irq_data *data; if (!desc) return -EINVAL; + + data = irq_desc_get_irq_data(desc); + if (WARN_ON_ONCE(!in_irq() && handle_enforce_irqctx(data))) + return -EPERM; + generic_handle_irq_desc(desc); return 0; } diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c index 98c04ca5fa43d..5064b13b80d60 100644 --- a/kernel/irq/resend.c +++ b/kernel/irq/resend.c @@ -72,8 +72,9 @@ void check_irq_resend(struct irq_desc *desc) desc->istate &= ~IRQS_PENDING; desc->istate |= IRQS_REPLAY; - if (!desc->irq_data.chip->irq_retrigger || - !desc->irq_data.chip->irq_retrigger(&desc->irq_data)) { + if ((!desc->irq_data.chip->irq_retrigger || + !desc->irq_data.chip->irq_retrigger(&desc->irq_data)) && + !handle_enforce_irqctx(&desc->irq_data)) { #ifdef CONFIG_HARDIRQS_SW_RESEND unsigned int irq = irq_desc_get_irq(desc); -- 2.25.1

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[PATCH openEuler-1.0-LTS 1/3] jbd2: remove the out label in __jbd2_journal_remove_checkpoint()
by Yang Yingliang 24 May '21

24 May '21

From: Zhang Yi <yi.zhang(a)huawei.com> hulk inclusion category: bugfix bugzilla: 50788 CVE: NA --------------------------- The 'out' lable just return the 'ret' value and seems not required, so remove this label and switch to return appropriate value immediately. This patch also do some minor cleanup, no logical change. Signed-off-by: Zhang Yi <yi.zhang(a)huawei.com> Reviewed-by: Jan Kara <jack(a)suse.cz> Reviewed-by: Zhang Xiaoxu <zhangxiaoxu5(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- fs/jbd2/checkpoint.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c index 96bf33986d030..61de87fbf5ec3 100644 --- a/fs/jbd2/checkpoint.c +++ b/fs/jbd2/checkpoint.c @@ -562,13 +562,13 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh) struct transaction_chp_stats_s *stats; transaction_t *transaction; journal_t *journal; - int ret = 0; JBUFFER_TRACE(jh, "entry"); - if ((transaction = jh->b_cp_transaction) == NULL) { + transaction = jh->b_cp_transaction; + if (!transaction) { JBUFFER_TRACE(jh, "not on transaction"); - goto out; + return 0; } journal = transaction->t_journal; @@ -577,9 +577,9 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh) jh->b_cp_transaction = NULL; jbd2_journal_put_journal_head(jh); - if (transaction->t_checkpoint_list != NULL || - transaction->t_checkpoint_io_list != NULL) - goto out; + /* Is this transaction empty? */ + if (transaction->t_checkpoint_list || transaction->t_checkpoint_io_list) + return 0; /* * There is one special case to worry about: if we have just pulled the @@ -591,10 +591,12 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh) * See the comment at the end of jbd2_journal_commit_transaction(). */ if (transaction->t_state != T_FINISHED) - goto out; + return 0; - /* OK, that was the last buffer for the transaction: we can now - safely remove this transaction from the log */ + /* + * OK, that was the last buffer for the transaction, we can now + * safely remove this transaction from the log. + */ stats = &transaction->t_chp_stats; if (stats->cs_chp_time) stats->cs_chp_time = jbd2_time_diff(stats->cs_chp_time, @@ -604,9 +606,7 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh) __jbd2_journal_drop_transaction(journal, transaction); jbd2_journal_free_transaction(transaction); - ret = 1; -out: - return ret; + return 1; } /* -- 2.25.1

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[PATCH kernel-4.19 1/3] jbd2: remove the out label in __jbd2_journal_remove_checkpoint()
by Yang Yingliang 24 May '21

24 May '21

From: Zhang Yi <yi.zhang(a)huawei.com> hulk inclusion category: bugfix bugzilla: 50788 CVE: NA --------------------------- The 'out' lable just return the 'ret' value and seems not required, so remove this label and switch to return appropriate value immediately. This patch also do some minor cleanup, no logical change. Signed-off-by: Zhang Yi <yi.zhang(a)huawei.com> Reviewed-by: Jan Kara <jack(a)suse.cz> Reviewed-by: Zhang Xiaoxu <zhangxiaoxu5(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- fs/jbd2/checkpoint.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c index 96bf33986d030..61de87fbf5ec3 100644 --- a/fs/jbd2/checkpoint.c +++ b/fs/jbd2/checkpoint.c @@ -562,13 +562,13 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh) struct transaction_chp_stats_s *stats; transaction_t *transaction; journal_t *journal; - int ret = 0; JBUFFER_TRACE(jh, "entry"); - if ((transaction = jh->b_cp_transaction) == NULL) { + transaction = jh->b_cp_transaction; + if (!transaction) { JBUFFER_TRACE(jh, "not on transaction"); - goto out; + return 0; } journal = transaction->t_journal; @@ -577,9 +577,9 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh) jh->b_cp_transaction = NULL; jbd2_journal_put_journal_head(jh); - if (transaction->t_checkpoint_list != NULL || - transaction->t_checkpoint_io_list != NULL) - goto out; + /* Is this transaction empty? */ + if (transaction->t_checkpoint_list || transaction->t_checkpoint_io_list) + return 0; /* * There is one special case to worry about: if we have just pulled the @@ -591,10 +591,12 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh) * See the comment at the end of jbd2_journal_commit_transaction(). */ if (transaction->t_state != T_FINISHED) - goto out; + return 0; - /* OK, that was the last buffer for the transaction: we can now - safely remove this transaction from the log */ + /* + * OK, that was the last buffer for the transaction, we can now + * safely remove this transaction from the log. + */ stats = &transaction->t_chp_stats; if (stats->cs_chp_time) stats->cs_chp_time = jbd2_time_diff(stats->cs_chp_time, @@ -604,9 +606,7 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh) __jbd2_journal_drop_transaction(journal, transaction); jbd2_journal_free_transaction(transaction); - ret = 1; -out: - return ret; + return 1; } /* -- 2.25.1

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[PATCH openEuler-1.0-LTS 1/8] treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 378
by Yang Yingliang 22 May '21

22 May '21

From: Thomas Gleixner <tglx(a)linutronix.de> mainline inclusion from mainline-v5.2-rc4 commit 4317cf95ca02411cf788d10c1972a38582e8c34d category: feature bugzilla: NA CVE: NA ------------------------------------------------- Based on 1 normalized pattern(s): licensed under the gnu general public license version 2 gplv2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 5 file(s). Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de> Reviewed-by: Kate Stewart <kstewart(a)linuxfoundation.org> Reviewed-by: Armijn Hemel <armijn(a)tjaldur.nl> Reviewed-by: Allison Randal <allison(a)lohutok.net> Cc: linux-spdx(a)vger.kernel.org Link: https://lkml.kernel.org/r/20190531081036.993848054@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Reviewed-by: Jian Cheng <cj.chengjian(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- scripts/extract-vmlinux | 2 +- scripts/recordmcount.c | 2 +- scripts/recordmcount.h | 3 +-- scripts/sortextable.c | 2 +- scripts/sortextable.h | 4 +--- 5 files changed, 5 insertions(+), 8 deletions(-) diff --git a/scripts/extract-vmlinux b/scripts/extract-vmlinux index e6239f39abadd..5731a6845a9e8 100755 --- a/scripts/extract-vmlinux +++ b/scripts/extract-vmlinux @@ -1,4 +1,5 @@ #!/bin/sh +# SPDX-License-Identifier: GPL-2.0-only # ---------------------------------------------------------------------- # extract-vmlinux - Extract uncompressed vmlinux from a kernel image # @@ -7,7 +8,6 @@ # # (c) 2011 Corentin Chary <corentin.chary(a)gmail.com> # -# Licensed under the GNU General Public License, version 2 (GPLv2). # ---------------------------------------------------------------------- check_vmlinux() diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c index 895c40e8679f7..4182274a5ab28 100644 --- a/scripts/recordmcount.c +++ b/scripts/recordmcount.c @@ -1,8 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * recordmcount.c: construct a table of the locations of calls to 'mcount' * so that ftrace can find them quickly. * Copyright 2009 John F. Reiser <jreiser(a)BitWagon.com>. All rights reserved. - * Licensed under the GNU General Public License, version 2 (GPLv2). * * Restructured to fit Linux format, as well as other updates: * Copyright 2010 Steven Rostedt <srostedt(a)redhat.com>, Red Hat Inc. diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h index ccfbfde615563..47fca2c69a73e 100644 --- a/scripts/recordmcount.h +++ b/scripts/recordmcount.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * recordmcount.h * @@ -15,8 +16,6 @@ * * This conversion to macros was done by: * Copyright 2010 Steven Rostedt <srostedt(a)redhat.com>, Red Hat Inc. - * - * Licensed under the GNU General Public License, version 2 (GPLv2). */ #undef append_func #undef is_fake_mcount diff --git a/scripts/sortextable.c b/scripts/sortextable.c index 365a907f98b3d..55768654e3c6a 100644 --- a/scripts/sortextable.c +++ b/scripts/sortextable.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * sortextable.c: Sort the kernel's exception table * @@ -6,7 +7,6 @@ * Based on code taken from recortmcount.c which is: * * Copyright 2009 John F. Reiser <jreiser(a)BitWagon.com>. All rights reserved. - * Licensed under the GNU General Public License, version 2 (GPLv2). * * Restructured to fit Linux format, as well as other updates: * Copyright 2010 Steven Rostedt <srostedt(a)redhat.com>, Red Hat Inc. diff --git a/scripts/sortextable.h b/scripts/sortextable.h index ba8700428e21d..d4b3f6c40f027 100644 --- a/scripts/sortextable.h +++ b/scripts/sortextable.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * sortextable.h * @@ -7,9 +8,6 @@ * * Copyright 2009 John F. Reiser <jreiser(a)BitWagon.com>. All rights reserved. * Copyright 2010 Steven Rostedt <srostedt(a)redhat.com>, Red Hat Inc. - * - * - * Licensed under the GNU General Public License, version 2 (GPLv2). */ #undef extable_ent_size -- 2.25.1

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[PATCH kernel-4.19 1/8] treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 378
by Yang Yingliang 22 May '21

22 May '21

From: Thomas Gleixner <tglx(a)linutronix.de> mainline inclusion from mainline-v5.2-rc4 commit 4317cf95ca02411cf788d10c1972a38582e8c34d category: feature bugzilla: NA CVE: NA ------------------------------------------------- Based on 1 normalized pattern(s): licensed under the gnu general public license version 2 gplv2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 5 file(s). Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de> Reviewed-by: Kate Stewart <kstewart(a)linuxfoundation.org> Reviewed-by: Armijn Hemel <armijn(a)tjaldur.nl> Reviewed-by: Allison Randal <allison(a)lohutok.net> Cc: linux-spdx(a)vger.kernel.org Link: https://lkml.kernel.org/r/20190531081036.993848054@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Reviewed-by: Jian Cheng <cj.chengjian(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- scripts/extract-vmlinux | 2 +- scripts/recordmcount.c | 2 +- scripts/recordmcount.h | 3 +-- scripts/sortextable.c | 2 +- scripts/sortextable.h | 4 +--- 5 files changed, 5 insertions(+), 8 deletions(-) diff --git a/scripts/extract-vmlinux b/scripts/extract-vmlinux index e6239f39abadd..5731a6845a9e8 100755 --- a/scripts/extract-vmlinux +++ b/scripts/extract-vmlinux @@ -1,4 +1,5 @@ #!/bin/sh +# SPDX-License-Identifier: GPL-2.0-only # ---------------------------------------------------------------------- # extract-vmlinux - Extract uncompressed vmlinux from a kernel image # @@ -7,7 +8,6 @@ # # (c) 2011 Corentin Chary <corentin.chary(a)gmail.com> # -# Licensed under the GNU General Public License, version 2 (GPLv2). # ---------------------------------------------------------------------- check_vmlinux() diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c index d3e61dcc61295..9660dc632b54f 100644 --- a/scripts/recordmcount.c +++ b/scripts/recordmcount.c @@ -1,8 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * recordmcount.c: construct a table of the locations of calls to 'mcount' * so that ftrace can find them quickly. * Copyright 2009 John F. Reiser <jreiser(a)BitWagon.com>. All rights reserved. - * Licensed under the GNU General Public License, version 2 (GPLv2). * * Restructured to fit Linux format, as well as other updates: * Copyright 2010 Steven Rostedt <srostedt(a)redhat.com>, Red Hat Inc. diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h index ccfbfde615563..47fca2c69a73e 100644 --- a/scripts/recordmcount.h +++ b/scripts/recordmcount.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * recordmcount.h * @@ -15,8 +16,6 @@ * * This conversion to macros was done by: * Copyright 2010 Steven Rostedt <srostedt(a)redhat.com>, Red Hat Inc. - * - * Licensed under the GNU General Public License, version 2 (GPLv2). */ #undef append_func #undef is_fake_mcount diff --git a/scripts/sortextable.c b/scripts/sortextable.c index 365a907f98b3d..55768654e3c6a 100644 --- a/scripts/sortextable.c +++ b/scripts/sortextable.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * sortextable.c: Sort the kernel's exception table * @@ -6,7 +7,6 @@ * Based on code taken from recortmcount.c which is: * * Copyright 2009 John F. Reiser <jreiser(a)BitWagon.com>. All rights reserved. - * Licensed under the GNU General Public License, version 2 (GPLv2). * * Restructured to fit Linux format, as well as other updates: * Copyright 2010 Steven Rostedt <srostedt(a)redhat.com>, Red Hat Inc. diff --git a/scripts/sortextable.h b/scripts/sortextable.h index ba8700428e21d..d4b3f6c40f027 100644 --- a/scripts/sortextable.h +++ b/scripts/sortextable.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * sortextable.h * @@ -7,9 +8,6 @@ * * Copyright 2009 John F. Reiser <jreiser(a)BitWagon.com>. All rights reserved. * Copyright 2010 Steven Rostedt <srostedt(a)redhat.com>, Red Hat Inc. - * - * - * Licensed under the GNU General Public License, version 2 (GPLv2). */ #undef extable_ent_size -- 2.25.1

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[PATCH kernel-4.19 1/2] Revert "ext4: Fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed"
by Yang Yingliang 22 May '21

22 May '21

From: Ye Bin <yebin10(a)huawei.com> hulk inclusion category: bugfix bugzilla: 51854 CVE: NA ------------------------------------------------- This reverts commit 5446b76c34ed8875ba05a61fccfe838a98193791. Signed-off-by: Ye Bin <yebin10(a)huawei.com> Reviewed-by: Zhang Xiaoxu <zhangxiaoxu5(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- fs/ext4/extents.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 584c1ffc9a0c2..251c18fc74636 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3330,7 +3330,7 @@ static int ext4_split_extent_at(handle_t *handle, goto out; } else if (err) - goto err; + goto fix_extent_len; out: ext4_ext_show_leaf(inode, path); @@ -3338,7 +3338,6 @@ static int ext4_split_extent_at(handle_t *handle, fix_extent_len: ex->ee_len = orig_ex.ee_len; -err: ext4_ext_dirty(handle, inode, path + path->p_depth); return err; } -- 2.25.1

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[PATCH kernel-4.19 1/4] nfs: Fix copy-and-paste error in debug message
by Yang Yingliang 22 May '21

22 May '21

From: Donald Buczek <buczek(a)molgen.mpg.de> mainline inclusion from mainline-v5.3-rc1 commit 2eaf426debdce566df9302b218307483903ac534 category: bugfix bugzilla: NA CVE: NA -------------------------------- The debug message of decode_attr_lease_time incorrectly says "file size". Fix it to "lease time". Signed-off-by: Donald Buczek <buczek(a)molgen.mpg.de> Signed-off-by: Trond Myklebust <trond.myklebust(a)hammerspace.com> Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5(a)huawei.com> Reviewed-by: Zhang Yi <yi.zhang(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- fs/nfs/nfs4xdr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 6236daec4cc6c..45a437b21408b 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -3471,7 +3471,7 @@ static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint *res = be32_to_cpup(p); bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME; } - dprintk("%s: file size=%u\n", __func__, (unsigned int)*res); + dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res); return 0; out_overflow: print_overflow_msg(__func__, xdr); -- 2.25.1

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[PATCH kernel-4.19] ext4: cleanup in-core orphan list if ext4_truncate() failed to get a transaction handle
by Yang Yingliang 22 May '21

22 May '21

From: Zhang Yi <yi.zhang(a)huawei.com> hulk inclusion category: bugfix bugzilla: 51864 CVE: NA --------------------------- In ext4_orphan_cleanup(), if ext4_truncate() failed to get a transaction handle, it didn't remove the inode from the in-core orphan list, which may probably trigger below error dump in ext4_destroy_inode() during the final iput() and could lead to memory corruption on the later orphan list changes. EXT4-fs (sda): Inode 6291467 (00000000b8247c67): orphan list check failed! 00000000b8247c67: 0001f30a 00000004 00000000 00000023 ............#... 00000000e24cde71: 00000006 014082a3 00000000 00000000 ......@......... 0000000072c6a5ee: 00000000 00000000 00000000 00000000 ................ ... This patch fix this by cleanup in-core orphan list manually if ext4_truncate() return error. Signed-off-by: Zhang Yi <yi.zhang(a)huawei.com> Signed-off-by: yangerkun <yangerkun(a)huawei.com> Reviewed-by: Zhang Yi <yi.zhang(a)huawei.com> Reviewed-by: Zhang Xiaoxu <zhangxiaoxu5(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- fs/ext4/super.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 50fb70caa0e9f..fcb1f5d3b09ec 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2871,8 +2871,15 @@ static void ext4_orphan_cleanup(struct super_block *sb, inode_lock(inode); truncate_inode_pages(inode->i_mapping, inode->i_size); ret = ext4_truncate(inode); - if (ret) + if (ret) { + /* + * We need to clean up the in-core orphan list + * manually if ext4_truncate() failed to get a + * transaction handle. + */ + ext4_orphan_del(NULL, inode); ext4_std_error(inode->i_sb, ret); + } inode_unlock(inode); nr_truncates++; } else { -- 2.25.1

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[PATCH kernel-4.19] mm: enhance variables check and sync for pin mem
by Yang Yingliang 22 May '21

22 May '21

From: Jingxian He <hejingxian(a)huawei.com> hulk inclusion category: feature bugzilla: 48159 CVE: N/A ------------------------------ Enhance variables check and sync for pin mem as followings: 1) Remove unused variable in set_fork_pid; 2) Remove unused calling of access_ok, which is called in copy_from_user; 3) Enhance page_map_entry_start check in pin_mem_area; 4) Keep get_page_map_info and create_page_map_info for internal use, and increase get_page_map_info_by_pid and create_page_map_info_by_pid for external use, which is protected by spinlock; 5) Use spin_lock_irqsave instead of spin_lock. Signed-off-by: Jingxian He <hejingxian(a)huawei.com> Reviewed-by: Jing Xiangfeng <jingxiangfeng(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- drivers/char/pin_memory.c | 7 ------ include/linux/pin_mem.h | 4 +-- mm/pin_mem.c | 51 +++++++++++++++++++++++++++++---------- 3 files changed, 40 insertions(+), 22 deletions(-) diff --git a/drivers/char/pin_memory.c b/drivers/char/pin_memory.c index 05fa7cfde03b2..4b3a6c8b31de9 100644 --- a/drivers/char/pin_memory.c +++ b/drivers/char/pin_memory.c @@ -98,8 +98,6 @@ static int set_pin_mem_area(unsigned long arg) struct pin_mem_area_set pmas; void __user *buf = (void __user *)arg; - if (!access_ok(buf, sizeof(pmas))) - return -EFAULT; if (copy_from_user(&pmas, buf, sizeof(pmas))) return -EINVAL; if (pmas.area_num > MAX_PIN_MEM_AREA_NUM) { @@ -119,8 +117,6 @@ static int pin_mem_remap(unsigned long arg) void __user *buf = (void __user *)arg; struct pid *pid_s; - if (!access_ok(buf, sizeof(int))) - return -EINVAL; if (copy_from_user(&pid, buf, sizeof(int))) return -EINVAL; @@ -157,11 +153,8 @@ static int pin_mem_remap(unsigned long arg) static int set_fork_pid(unsigned long arg) { int pid; - struct page_map_info *pmi = NULL; void __user *buf = (void __user *)arg; - if (!access_ok(buf, sizeof(int))) - goto fault; if (copy_from_user(&pid, buf, sizeof(int))) goto fault; current->fork_pid = pid; diff --git a/include/linux/pin_mem.h b/include/linux/pin_mem.h index 21422f8b0349c..6c54482a42a11 100644 --- a/include/linux/pin_mem.h +++ b/include/linux/pin_mem.h @@ -64,8 +64,8 @@ struct redirect_info { unsigned int redirect_index[0]; }; -extern struct page_map_info *get_page_map_info(int pid); -extern struct page_map_info *create_page_map_info(int pid); +extern struct page_map_info *get_page_map_info_by_pid(int pid); +extern struct page_map_info *create_page_map_info_by_pid(int pid); extern vm_fault_t do_mem_remap(int pid, struct mm_struct *mm); extern vm_fault_t do_anon_page_remap(struct vm_area_struct *vma, unsigned long address, pmd_t *pmd, struct page *page); diff --git a/mm/pin_mem.c b/mm/pin_mem.c index c657ae7f64860..d035934724cdc 100644 --- a/mm/pin_mem.c +++ b/mm/pin_mem.c @@ -72,7 +72,7 @@ static int __init setup_redirect_space_size(char *str) } early_param("redirect_space_size", setup_redirect_space_size); -struct page_map_info *create_page_map_info(int pid) +static struct page_map_info *create_page_map_info(int pid) { struct page_map_info *new; @@ -93,9 +93,20 @@ struct page_map_info *create_page_map_info(int pid) pin_pid_num++; return new; } -EXPORT_SYMBOL_GPL(create_page_map_info); -struct page_map_info *get_page_map_info(int pid) +struct page_map_info *create_page_map_info_by_pid(int pid) +{ + unsigned long flags; + struct page_map_info *ret; + + spin_lock_irqsave(&page_map_entry_lock, flags); + ret = create_page_map_info(pid); + spin_unlock_irqrestore(&page_map_entry_lock, flags); + return ret; +} +EXPORT_SYMBOL_GPL(create_page_map_info_by_pid); + +static struct page_map_info *get_page_map_info(int pid) { int i; @@ -108,7 +119,18 @@ struct page_map_info *get_page_map_info(int pid) } return NULL; } -EXPORT_SYMBOL_GPL(get_page_map_info); + +struct page_map_info *get_page_map_info_by_pid(int pid) +{ + unsigned long flags; + struct page_map_info *ret; + + spin_lock_irqsave(&page_map_entry_lock, flags); + ret = get_page_map_info(pid); + spin_unlock_irqrestore(&page_map_entry_lock, flags); + return ret; +} +EXPORT_SYMBOL_GPL(get_page_map_info_by_pid); static struct page *find_head_page(struct page *page) { @@ -380,12 +402,12 @@ static void reserve_user_space_map_pages(void) } } } - spin_unlock(&page_map_entry_lock); + spin_unlock_irqrestore(&page_map_entry_lock, flags); return; free_pages: free_user_map_pages(index, i, j); - spin_unlock(&page_map_entry_lock); + spin_unlock_irqrestore(&page_map_entry_lock, flags); } @@ -672,10 +694,11 @@ int pin_mem_area(struct task_struct *task, struct mm_struct *mm, pid = task->pid; spin_lock_irqsave(&page_map_entry_lock, flags); nr_pages = ((end_addr - start_addr) / PAGE_SIZE); - if ((unsigned long)page_map_entry_start + nr_pages * sizeof(struct page *) >= - page_map_entry_end) { + if ((unsigned long)page_map_entry_start + + nr_pages * sizeof(unsigned long) + + sizeof(struct page_map_entry) >= page_map_entry_end) { pr_warn("Page map entry use up!\n"); - ret = -EFAULT; + ret = -ENOMEM; goto finish; } @@ -965,13 +988,15 @@ vm_fault_t do_mem_remap(int pid, struct mm_struct *mm) if (reserve_user_map_pages_fail || !mm) return -EFAULT; + + spin_lock_irqsave(&page_map_entry_lock, flags); pmi = get_page_map_info(pid); + if (pmi) + pmi->disable_free_page = true; + spin_unlock_irqrestore(&page_map_entry_lock, flags); if (!pmi) return -EFAULT; - spin_lock_irqsave(&page_map_entry_lock, flags); - pmi->disable_free_page = true; - spin_unlock(&page_map_entry_lock); down_write(&mm->mmap_sem); pme = pmi->pme; vma = mm->mmap; @@ -1067,7 +1092,7 @@ void clear_pin_memory_record(void) pin_pid_num = 0; page_map_entry_start = __page_map_entry_start; } - spin_unlock(&page_map_entry_lock); + spin_unlock_irqrestore(&page_map_entry_lock, flags); } EXPORT_SYMBOL_GPL(clear_pin_memory_record); -- 2.25.1

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