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Groups > linux.kernel > #1593159
| From | Johannes Thumshirn <jthumshirn@suse.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH] zram: set physical queue limits to avoid array out of bounds accesses |
| Date | 2017-03-06 11:30 +0100 |
| Message-ID | <thY3U-6MU-11@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
zram can handle at most SECTORS_PER_PAGE sectors in a bio's bvec. When using the NVMe over Fabrics loopback target which potentially sends a huge bulk of pages attached to the bio's bvec this results in a kernel panic because of array out of bounds accesses in zram_decompress_page(). Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> --- drivers/block/zram/zram_drv.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index e27d89a..dceb5ed 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -1189,6 +1189,8 @@ static int zram_add(void) blk_queue_io_min(zram->disk->queue, PAGE_SIZE); blk_queue_io_opt(zram->disk->queue, PAGE_SIZE); zram->disk->queue->limits.discard_granularity = PAGE_SIZE; + zram->disk->queue->limits.max_sectors = SECTORS_PER_PAGE; + zram->disk->queue->limits.chunk_sectors = 0; blk_queue_max_discard_sectors(zram->disk->queue, UINT_MAX); /* * zram_bio_discard() will clear all logical blocks if logical block -- 1.8.5.6
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[PATCH] zram: set physical queue limits to avoid array out of bounds accesses Johannes Thumshirn <jthumshirn@suse.de> - 2017-03-06 11:30 +0100
Re: [PATCH] zram: set physical queue limits to avoid array out of bounds accesses Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2017-03-06 11:50 +0100
Re: [PATCH] zram: set physical queue limits to avoid array out of bounds accesses Andrew Morton <akpm@linux-foundation.org> - 2017-03-06 22:40 +0100
Re: [PATCH] zram: set physical queue limits to avoid array out of bounds accesses Minchan Kim <minchan@kernel.org> - 2017-03-07 07:10 +0100
Re: [PATCH] zram: set physical queue limits to avoid array out of bounds accesses Minchan Kim <minchan@kernel.org> - 2017-03-07 08:30 +0100
Re: [PATCH] zram: set physical queue limits to avoid array out of bounds accesses Minchan Kim <minchan@kernel.org> - 2017-03-07 10:20 +0100
Re: [PATCH] zram: set physical queue limits to avoid array out of bounds accesses Johannes Thumshirn <jthumshirn@suse.de> - 2017-03-07 11:30 +0100
Re: [PATCH] zram: set physical queue limits to avoid array out of bounds accesses Minchan Kim <minchan@kernel.org> - 2017-03-08 06:50 +0100
Re: [PATCH] zram: set physical queue limits to avoid array out of bounds accesses Johannes Thumshirn <jthumshirn@suse.de> - 2017-03-08 09:50 +0100
Re: [PATCH] zram: set physical queue limits to avoid array out of bounds accesses Minchan Kim <minchan@kernel.org> - 2017-03-09 06:30 +0100
Re: [PATCH] zram: set physical queue limits to avoid array out of bounds accesses Hannes Reinecke <hare@suse.de> - 2017-03-07 12:40 +0100
Re: [PATCH] zram: set physical queue limits to avoid array out of bounds accesses Hannes Reinecke <hare@suse.de> - 2017-03-07 08:40 +0100
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