Ming Lei
433e1ee850
blk-mq: avoid sysfs buffer overflow with too many CPU cores ...
commit 8962842ca5abdcf98e22ab3b2b45a103f0408b95 upstream.
It is reported that sysfs buffer overflow can be triggered if the system
has too many CPU cores(>841 on 4K PAGE_SIZE) when showing CPUs of
hctx via /sys/block/$DEV/mq/$N/cpu_list.
Use snprintf to avoid the potential buffer overflow.
This version doesn't change the attribute format, and simply stops
showing CPU numbers if the buffer is going to overflow.
Cc: stable@vger.kernel.org
Fixes: 676141e48af7("blk-mq: don't dump CPU -> hw queue map on driver load")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-21 10:42:02 +01:00
partitions/aix: fix usage of uninitialized lv_info and lvname structures
2018-09-19 22:47:15 +02:00
badblocks: fix wrong return value in badblocks_set if badblocks are disabled
2017-12-20 10:07:29 +01:00
bio-integrity: Do not allocate integrity context for bio w/o data
2018-04-13 19:48:18 +02:00
block: do not leak memory in bio_copy_user_iov()
2019-04-17 08:36:46 +02:00
block,blkcg: use __GFP_NOWARN for best-effort allocations in blkcg
2018-09-19 22:47:11 +02:00
block: blk_init_allocated_queue() set q->fq as NULL in the fail case
2019-08-11 12:22:18 +02:00
block: Fix spelling in a source code comment
2016-07-20 21:28:22 -06:00
block: flush: fix IO hang in case of flood fua req
2016-10-26 07:49:27 -06:00
block: fix blk_integrity_register to use template's interval_exp if not 0
2017-05-20 14:28:36 +02:00
mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd
2015-11-06 17:50:42 -08:00
block: fix infinite loop if the device loses discard capability
2018-12-29 13:40:14 +01:00
blk_rq_map_user_iov: fix error override
2018-02-25 11:05:42 +01:00
block: make sure a big bio is split into at most 256 bvecs
2016-08-24 08:17:24 -06:00
blk-mq: allow the driver to pass in a queue mapping
2016-09-15 08:42:03 -06:00
blk-mq-pci: add a fallback when pci_irq_get_affinity returns NULL
2017-08-24 17:12:20 -07:00
blk-mq: avoid sysfs buffer overflow with too many CPU cores
2019-12-21 10:42:02 +01:00
blk-mq: Fix tagset reinit in the presence of cpu hot-unplug
2017-12-20 10:07:20 +01:00
Merge branch 'for-4.9/block-irq' of git://git.kernel.dk/linux-block
2016-10-09 17:29:33 -07:00
block/mq: fix potential deadlock during cpu hotplug
2018-04-24 09:34:18 +02:00
blk-mq: initialize mq kobjects in blk_mq_init_allocated_queue()
2017-12-14 09:28:21 +01:00
block: kill off q->flush_flags
2016-04-13 13:33:19 -06:00
This adds a new gcc plugin named "latent_entropy". It is designed to
2016-10-15 10:03:15 -07:00
blk-mq: register device instead of disk
2016-09-21 07:56:16 -06:00
block: support different tag allocation policy
2015-01-23 14:15:46 -07:00
blk-throttle: make sure expire time isn't too big
2018-03-22 09:17:44 +01:00
block: Fix a race between blk_cleanup_queue() and timeout handling
2017-11-30 08:39:06 +00:00
blk-mq: remove ->map_queue
2016-09-15 08:42:03 -06:00
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
2015-09-19 18:57:09 -07:00
Revert "bsg-lib: don't free job in bsg_prepare_job"
2017-10-21 17:21:33 +02:00
sg_write()/bsg_write() is not fit to be called under KERNEL_DS
2017-01-09 08:32:25 +01:00
block,blkcg: use __GFP_NOWARN for best-effort allocations in blkcg
2018-09-19 22:47:11 +02:00
block: remove unrelated header files and export symbol
2014-01-21 20:18:26 -08:00
take floppy compat ioctls to sodding floppy.c
2019-08-04 09:33:29 +02:00
block: do not merge requests without consulting with io scheduler
2016-07-20 21:35:12 -06:00
block: Fix secure erase
2016-08-16 09:16:51 -06:00
block: fix bdi vs gendisk lifetime mismatch
2016-08-04 14:19:16 -06:00
block: invalidate the page cache when issuing BLKZEROOUT
2016-10-11 15:06:30 -07:00
block: fix use-after-free in sys_ioprio_get()
2016-07-01 08:39:24 -06:00
Merge branch 'for-4.9/block-irq' of git://git.kernel.dk/linux-block
2016-10-09 17:29:33 -07:00
blkcg: make CONFIG_BLK_CGROUP bool
2012-03-06 21:27:21 +01:00
Merge branch 'for-4.9/block-smp' of git://git.kernel.dk/linux-block
2016-10-09 17:32:20 -07:00
elevator: use list_{first,prev,next}_entry
2015-11-16 15:21:48 -07:00
block: fix an error code in add_partition()
2018-04-13 19:48:04 +02:00
block: allow WRITE_SAME commands with the SG_IO ioctl
2017-03-22 12:43:38 +01:00
block: Consolidate static integrity profile properties
2015-10-21 14:42:38 -06:00
433e1ee850