diff options
| -rw-r--r-- | Documentation/devicetree/bindings/.gitignore | 5 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml | 2 | ||||
| -rw-r--r-- | drivers/of/address.c | 21 | ||||
| -rw-r--r-- | drivers/of/platform.c | 12 | ||||
| -rw-r--r-- | fs/btrfs/raid56.c | 14 | ||||
| -rw-r--r-- | fs/btrfs/send.c | 6 | ||||
| -rw-r--r-- | fs/btrfs/volumes.c | 6 | ||||
| -rw-r--r-- | fs/btrfs/zlib.c | 2 | ||||
| -rw-r--r-- | fs/coredump.c | 48 | ||||
| -rw-r--r-- | kernel/cgroup/cpuset.c | 45 | ||||
| -rw-r--r-- | kernel/trace/trace.c | 3 |
11 files changed, 111 insertions, 53 deletions
diff --git a/Documentation/devicetree/bindings/.gitignore b/Documentation/devicetree/bindings/.gitignore index a77719968a7e..51ddb26d93f0 100644 --- a/Documentation/devicetree/bindings/.gitignore +++ b/Documentation/devicetree/bindings/.gitignore @@ -2,3 +2,8 @@ *.example.dts /processed-schema*.yaml /processed-schema*.json + +# +# We don't want to ignore the following even if they are dot-files +# +!.yamllint diff --git a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml index 9f7d3e11aacb..8449e14af9f3 100644 --- a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml +++ b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml @@ -108,7 +108,7 @@ properties: msi-controller: description: - Only present if the Message Based Interrupt functionnality is + Only present if the Message Based Interrupt functionality is being exposed by the HW, and the mbi-ranges property present. mbi-ranges: diff --git a/drivers/of/address.c b/drivers/of/address.c index c34ac33b7338..67763e5b8c0e 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -965,8 +965,19 @@ int of_dma_get_range(struct device_node *np, const struct bus_dma_region **map) } of_dma_range_parser_init(&parser, node); - for_each_of_range(&parser, &range) + for_each_of_range(&parser, &range) { + if (range.cpu_addr == OF_BAD_ADDR) { + pr_err("translation of DMA address(%llx) to CPU address failed node(%pOF)\n", + range.bus_addr, node); + continue; + } num_ranges++; + } + + if (!num_ranges) { + ret = -EINVAL; + goto out; + } r = kcalloc(num_ranges + 1, sizeof(*r), GFP_KERNEL); if (!r) { @@ -975,18 +986,16 @@ int of_dma_get_range(struct device_node *np, const struct bus_dma_region **map) } /* - * Record all info in the generic DMA ranges array for struct device. + * Record all info in the generic DMA ranges array for struct device, + * returning an error if we don't find any parsable ranges. */ *map = r; of_dma_range_parser_init(&parser, node); for_each_of_range(&parser, &range) { pr_debug("dma_addr(%llx) cpu_addr(%llx) size(%llx)\n", range.bus_addr, range.cpu_addr, range.size); - if (range.cpu_addr == OF_BAD_ADDR) { - pr_err("translation of DMA address(%llx) to CPU address failed node(%pOF)\n", - range.bus_addr, node); + if (range.cpu_addr == OF_BAD_ADDR) continue; - } r->cpu_start = range.cpu_addr; r->dma_start = range.bus_addr; r->size = range.size; diff --git a/drivers/of/platform.c b/drivers/of/platform.c index 81c8c227ab6b..b3878a98d27f 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -525,6 +525,7 @@ static int __init of_platform_default_populate_init(void) if (IS_ENABLED(CONFIG_PPC)) { struct device_node *boot_display = NULL; struct platform_device *dev; + int display_number = 0; int ret; /* Check if we have a MacOS display without a node spec */ @@ -555,16 +556,23 @@ static int __init of_platform_default_populate_init(void) if (!of_get_property(node, "linux,opened", NULL) || !of_get_property(node, "linux,boot-display", NULL)) continue; - dev = of_platform_device_create(node, "of-display", NULL); + dev = of_platform_device_create(node, "of-display.0", NULL); + of_node_put(node); if (WARN_ON(!dev)) return -ENOMEM; boot_display = node; + display_number++; break; } for_each_node_by_type(node, "display") { + char buf[14]; + const char *of_display_format = "of-display.%d"; + if (!of_get_property(node, "linux,opened", NULL) || node == boot_display) continue; - of_platform_device_create(node, "of-display", NULL); + ret = snprintf(buf, sizeof(buf), of_display_format, display_number++); + if (ret < sizeof(buf)) + of_platform_device_create(node, buf, NULL); } } else { diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c index 6a2cf754912d..ff4b1d583788 100644 --- a/fs/btrfs/raid56.c +++ b/fs/btrfs/raid56.c @@ -1426,12 +1426,20 @@ static void rbio_update_error_bitmap(struct btrfs_raid_bio *rbio, struct bio *bi u32 bio_size = 0; struct bio_vec *bvec; struct bvec_iter_all iter_all; + int i; bio_for_each_segment_all(bvec, bio, iter_all) bio_size += bvec->bv_len; - bitmap_set(rbio->error_bitmap, total_sector_nr, - bio_size >> rbio->bioc->fs_info->sectorsize_bits); + /* + * Since we can have multiple bios touching the error_bitmap, we cannot + * call bitmap_set() without protection. + * + * Instead use set_bit() for each bit, as set_bit() itself is atomic. + */ + for (i = total_sector_nr; i < total_sector_nr + + (bio_size >> rbio->bioc->fs_info->sectorsize_bits); i++) + set_bit(i, rbio->error_bitmap); } /* Verify the data sectors at read time. */ @@ -1886,7 +1894,7 @@ pstripe: sector->uptodate = 1; } if (failb >= 0) { - ret = verify_one_sector(rbio, faila, sector_nr); + ret = verify_one_sector(rbio, failb, sector_nr); if (ret < 0) goto cleanup; diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index e65e6b6600a7..d50182b6deec 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -8073,10 +8073,10 @@ long btrfs_ioctl_send(struct inode *inode, struct btrfs_ioctl_send_args *arg) /* * Check that we don't overflow at later allocations, we request * clone_sources_count + 1 items, and compare to unsigned long inside - * access_ok. + * access_ok. Also set an upper limit for allocation size so this can't + * easily exhaust memory. Max number of clone sources is about 200K. */ - if (arg->clone_sources_count > - ULONG_MAX / sizeof(struct clone_root) - 1) { + if (arg->clone_sources_count > SZ_8M / sizeof(struct clone_root)) { ret = -EINVAL; goto out; } diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index bcfef75b97da..4cdadf30163d 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1600,7 +1600,7 @@ again: if (ret < 0) goto out; - while (1) { + while (search_start < search_end) { l = path->nodes[0]; slot = path->slots[0]; if (slot >= btrfs_header_nritems(l)) { @@ -1623,6 +1623,9 @@ again: if (key.type != BTRFS_DEV_EXTENT_KEY) goto next; + if (key.offset > search_end) + break; + if (key.offset > search_start) { hole_size = key.offset - search_start; dev_extent_hole_check(device, &search_start, &hole_size, @@ -1683,6 +1686,7 @@ next: else ret = 0; + ASSERT(max_hole_start + max_hole_size <= search_end); out: btrfs_free_path(path); *start = max_hole_start; diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c index 01a13de11832..da7bb9187b68 100644 --- a/fs/btrfs/zlib.c +++ b/fs/btrfs/zlib.c @@ -63,7 +63,7 @@ struct list_head *zlib_alloc_workspace(unsigned int level) workspacesize = max(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL), zlib_inflate_workspacesize()); - workspace->strm.workspace = kvmalloc(workspacesize, GFP_KERNEL); + workspace->strm.workspace = kvzalloc(workspacesize, GFP_KERNEL); workspace->level = level; workspace->buf = NULL; /* diff --git a/fs/coredump.c b/fs/coredump.c index de78bde2991b..a25ecec9ca7c 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -838,6 +838,30 @@ static int __dump_skip(struct coredump_params *cprm, size_t nr) } } +int dump_emit(struct coredump_params *cprm, const void *addr, int nr) +{ + if (cprm->to_skip) { + if (!__dump_skip(cprm, cprm->to_skip)) + return 0; + cprm->to_skip = 0; + } + return __dump_emit(cprm, addr, nr); +} +EXPORT_SYMBOL(dump_emit); + +void dump_skip_to(struct coredump_params *cprm, unsigned long pos) +{ + cprm->to_skip = pos - cprm->pos; +} +EXPORT_SYMBOL(dump_skip_to); + +void dump_skip(struct coredump_params *cprm, size_t nr) +{ + cprm->to_skip += nr; +} +EXPORT_SYMBOL(dump_skip); + +#ifdef CONFIG_ELF_CORE static int dump_emit_page(struct coredump_params *cprm, struct page *page) { struct bio_vec bvec = { @@ -871,30 +895,6 @@ static int dump_emit_page(struct coredump_params *cprm, struct page *page) return 1; } -int dump_emit(struct coredump_params *cprm, const void *addr, int nr) -{ - if (cprm->to_skip) { - if (!__dump_skip(cprm, cprm->to_skip)) - return 0; - cprm->to_skip = 0; - } - return __dump_emit(cprm, addr, nr); -} -EXPORT_SYMBOL(dump_emit); - -void dump_skip_to(struct coredump_params *cprm, unsigned long pos) -{ - cprm->to_skip = pos - cprm->pos; -} -EXPORT_SYMBOL(dump_skip_to); - -void dump_skip(struct coredump_params *cprm, size_t nr) -{ - cprm->to_skip += nr; -} -EXPORT_SYMBOL(dump_skip); - -#ifdef CONFIG_ELF_CORE int dump_user_range(struct coredump_params *cprm, unsigned long start, unsigned long len) { diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 205dc9edcaa9..ca826bd1eba3 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -1205,12 +1205,13 @@ void rebuild_sched_domains(void) /** * update_tasks_cpumask - Update the cpumasks of tasks in the cpuset. * @cs: the cpuset in which each task's cpus_allowed mask needs to be changed + * @new_cpus: the temp variable for the new effective_cpus mask * * Iterate through each task of @cs updating its cpus_allowed to the * effective cpuset's. As this function is called with cpuset_rwsem held, * cpuset membership stays stable. */ -static void update_tasks_cpumask(struct cpuset *cs) +static void update_tasks_cpumask(struct cpuset *cs, struct cpumask *new_cpus) { struct css_task_iter it; struct task_struct *task; @@ -1224,7 +1225,10 @@ static void update_tasks_cpumask(struct cpuset *cs) if (top_cs && (task->flags & PF_KTHREAD) && kthread_is_per_cpu(task)) continue; - set_cpus_allowed_ptr(task, cs->effective_cpus); + + cpumask_and(new_cpus, cs->effective_cpus, + task_cpu_possible_mask(task)); + set_cpus_allowed_ptr(task, new_cpus); } css_task_iter_end(&it); } @@ -1509,7 +1513,7 @@ static int update_parent_subparts_cpumask(struct cpuset *cs, int cmd, spin_unlock_irq(&callback_lock); if (adding || deleting) - update_tasks_cpumask(parent); + update_tasks_cpumask(parent, tmp->new_cpus); /* * Set or clear CS_SCHED_LOAD_BALANCE when partcmd_update, if necessary. @@ -1661,7 +1665,7 @@ update_parent_subparts: WARN_ON(!is_in_v2_mode() && !cpumask_equal(cp->cpus_allowed, cp->effective_cpus)); - update_tasks_cpumask(cp); + update_tasks_cpumask(cp, tmp->new_cpus); /* * On legacy hierarchy, if the effective cpumask of any non- @@ -2309,7 +2313,7 @@ static int update_prstate(struct cpuset *cs, int new_prs) } } - update_tasks_cpumask(parent); + update_tasks_cpumask(parent, tmpmask.new_cpus); if (parent->child_ecpus_count) update_sibling_cpumasks(parent, cs, &tmpmask); @@ -3348,7 +3352,7 @@ hotplug_update_tasks_legacy(struct cpuset *cs, * as the tasks will be migrated to an ancestor. */ if (cpus_updated && !cpumask_empty(cs->cpus_allowed)) - update_tasks_cpumask(cs); + update_tasks_cpumask(cs, new_cpus); if (mems_updated && !nodes_empty(cs->mems_allowed)) update_tasks_nodemask(cs); @@ -3385,7 +3389,7 @@ hotplug_update_tasks(struct cpuset *cs, spin_unlock_irq(&callback_lock); if (cpus_updated) - update_tasks_cpumask(cs); + update_tasks_cpumask(cs, new_cpus); if (mems_updated) update_tasks_nodemask(cs); } @@ -3692,15 +3696,38 @@ void __init cpuset_init_smp(void) * Description: Returns the cpumask_var_t cpus_allowed of the cpuset * attached to the specified @tsk. Guaranteed to return some non-empty * subset of cpu_online_mask, even if this means going outside the - * tasks cpuset. + * tasks cpuset, except when the task is in the top cpuset. **/ void cpuset_cpus_allowed(struct task_struct *tsk, struct cpumask *pmask) { unsigned long flags; + struct cpuset *cs; spin_lock_irqsave(&callback_lock, flags); - guarantee_online_cpus(tsk, pmask); + rcu_read_lock(); + + cs = task_cs(tsk); + if (cs != &top_cpuset) + guarantee_online_cpus(tsk, pmask); + /* + * Tasks in the top cpuset won't get update to their cpumasks + * when a hotplug online/offline event happens. So we include all + * offline cpus in the allowed cpu list. + */ + if ((cs == &top_cpuset) || cpumask_empty(pmask)) { + const struct cpumask *possible_mask = task_cpu_possible_mask(tsk); + + /* + * We first exclude cpus allocated to partitions. If there is no + * allowable online cpu left, we fall back to all possible cpus. + */ + cpumask_andnot(pmask, possible_mask, top_cpuset.subparts_cpus); + if (!cpumask_intersects(pmask, cpu_online_mask)) + cpumask_copy(pmask, possible_mask); + } + + rcu_read_unlock(); spin_unlock_irqrestore(&callback_lock, flags); } diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 78ed5f1baa8c..c9e40f692650 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -9148,9 +9148,6 @@ buffer_percent_write(struct file *filp, const char __user *ubuf, if (val > 100) return -EINVAL; - if (!val) - val = 1; - tr->buffer_percent = val; (*ppos)++; |