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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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43d2748394
Change num_ghes from int to unsigned int, preventing an overflow and causing subsequent vmalloc() to fail. The overflow happens in ghes_estatus_pool_init() when calculating len during execution of the statement below as both multiplication operands here are signed int: len += (num_ghes * GHES_ESOURCE_PREALLOC_MAX_SIZE); The following call trace is observed because of this bug: [ 9.317108] swapper/0: vmalloc error: size 18446744071562596352, exceeds total pages, mode:0xcc0(GFP_KERNEL), nodemask=(null),cpuset=/,mems_allowed=0-1 [ 9.317131] Call Trace: [ 9.317134] <TASK> [ 9.317137] dump_stack_lvl+0x49/0x5f [ 9.317145] dump_stack+0x10/0x12 [ 9.317146] warn_alloc.cold+0x7b/0xdf [ 9.317150] ? __device_attach+0x16a/0x1b0 [ 9.317155] __vmalloc_node_range+0x702/0x740 [ 9.317160] ? device_add+0x17f/0x920 [ 9.317164] ? dev_set_name+0x53/0x70 [ 9.317166] ? platform_device_add+0xf9/0x240 [ 9.317168] __vmalloc_node+0x49/0x50 [ 9.317170] ? ghes_estatus_pool_init+0x43/0xa0 [ 9.317176] vmalloc+0x21/0x30 [ 9.317177] ghes_estatus_pool_init+0x43/0xa0 [ 9.317179] acpi_hest_init+0x129/0x19c [ 9.317185] acpi_init+0x434/0x4a4 [ 9.317188] ? acpi_sleep_proc_init+0x2a/0x2a [ 9.317190] do_one_initcall+0x48/0x200 [ 9.317195] kernel_init_freeable+0x221/0x284 [ 9.317200] ? rest_init+0xe0/0xe0 [ 9.317204] kernel_init+0x1a/0x130 [ 9.317205] ret_from_fork+0x22/0x30 [ 9.317208] </TASK> Signed-off-by: Ashish Kalra <ashish.kalra@amd.com> [ rjw: Subject and changelog edits ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
148 lines
3.6 KiB
C
148 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef GHES_H
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#define GHES_H
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#include <acpi/apei.h>
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#include <acpi/hed.h>
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/*
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* One struct ghes is created for each generic hardware error source.
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* It provides the context for APEI hardware error timer/IRQ/SCI/NMI
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* handler.
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*
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* estatus: memory buffer for error status block, allocated during
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* HEST parsing.
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*/
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#define GHES_EXITING 0x0002
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struct ghes {
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union {
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struct acpi_hest_generic *generic;
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struct acpi_hest_generic_v2 *generic_v2;
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};
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struct acpi_hest_generic_status *estatus;
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unsigned long flags;
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union {
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struct list_head list;
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struct timer_list timer;
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unsigned int irq;
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};
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};
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struct ghes_estatus_node {
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struct llist_node llnode;
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struct acpi_hest_generic *generic;
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struct ghes *ghes;
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int task_work_cpu;
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struct callback_head task_work;
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};
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struct ghes_estatus_cache {
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u32 estatus_len;
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atomic_t count;
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struct acpi_hest_generic *generic;
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unsigned long long time_in;
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struct rcu_head rcu;
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};
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enum {
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GHES_SEV_NO = 0x0,
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GHES_SEV_CORRECTED = 0x1,
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GHES_SEV_RECOVERABLE = 0x2,
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GHES_SEV_PANIC = 0x3,
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};
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#ifdef CONFIG_ACPI_APEI_GHES
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/**
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* ghes_register_vendor_record_notifier - register a notifier for vendor
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* records that the kernel would otherwise ignore.
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* @nb: pointer to the notifier_block structure of the event handler.
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*
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* return 0 : SUCCESS, non-zero : FAIL
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*/
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int ghes_register_vendor_record_notifier(struct notifier_block *nb);
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/**
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* ghes_unregister_vendor_record_notifier - unregister the previously
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* registered vendor record notifier.
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* @nb: pointer to the notifier_block structure of the vendor record handler.
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*/
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void ghes_unregister_vendor_record_notifier(struct notifier_block *nb);
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#endif
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int ghes_estatus_pool_init(unsigned int num_ghes);
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/* From drivers/edac/ghes_edac.c */
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#ifdef CONFIG_EDAC_GHES
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void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err);
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int ghes_edac_register(struct ghes *ghes, struct device *dev);
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void ghes_edac_unregister(struct ghes *ghes);
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#else
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static inline void ghes_edac_report_mem_error(int sev,
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struct cper_sec_mem_err *mem_err)
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{
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}
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static inline int ghes_edac_register(struct ghes *ghes, struct device *dev)
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{
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return -ENODEV;
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}
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static inline void ghes_edac_unregister(struct ghes *ghes)
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{
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}
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#endif
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static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata)
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{
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return gdata->revision >> 8;
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}
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static inline void *acpi_hest_get_payload(struct acpi_hest_generic_data *gdata)
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{
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if (acpi_hest_get_version(gdata) >= 3)
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return (void *)(((struct acpi_hest_generic_data_v300 *)(gdata)) + 1);
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return gdata + 1;
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}
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static inline int acpi_hest_get_error_length(struct acpi_hest_generic_data *gdata)
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{
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return ((struct acpi_hest_generic_data *)(gdata))->error_data_length;
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}
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static inline int acpi_hest_get_size(struct acpi_hest_generic_data *gdata)
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{
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if (acpi_hest_get_version(gdata) >= 3)
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return sizeof(struct acpi_hest_generic_data_v300);
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return sizeof(struct acpi_hest_generic_data);
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}
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static inline int acpi_hest_get_record_size(struct acpi_hest_generic_data *gdata)
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{
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return (acpi_hest_get_size(gdata) + acpi_hest_get_error_length(gdata));
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}
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static inline void *acpi_hest_get_next(struct acpi_hest_generic_data *gdata)
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{
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return (void *)(gdata) + acpi_hest_get_record_size(gdata);
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}
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#define apei_estatus_for_each_section(estatus, section) \
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for (section = (struct acpi_hest_generic_data *)(estatus + 1); \
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(void *)section - (void *)(estatus + 1) < estatus->data_length; \
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section = acpi_hest_get_next(section))
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#ifdef CONFIG_ACPI_APEI_SEA
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int ghes_notify_sea(void);
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#else
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static inline int ghes_notify_sea(void) { return -ENOENT; }
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#endif
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#endif /* GHES_H */
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