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c9e529e635
commit 2fd10bcf0310b9525b2af9e1f7aa9ddd87c3772e upstream. syzbot found WARNING in qp_broker_alloc[1] in qp_host_alloc_queue() when num_pages is 0x100001, giving queue_size + queue_page_size bigger than KMALLOC_MAX_SIZE for kzalloc(), resulting order >= MAX_ORDER condition. queue_size + queue_page_size=0x8000d8, where KMALLOC_MAX_SIZE=0x400000. [1] Call Trace: alloc_pages include/linux/gfp.h:547 [inline] kmalloc_order+0x40/0x130 mm/slab_common.c:837 kmalloc_order_trace+0x15/0x70 mm/slab_common.c:853 kmalloc_large include/linux/slab.h:481 [inline] __kmalloc+0x257/0x330 mm/slub.c:3959 kmalloc include/linux/slab.h:557 [inline] kzalloc include/linux/slab.h:682 [inline] qp_host_alloc_queue drivers/misc/vmw_vmci/vmci_queue_pair.c:540 [inline] qp_broker_create drivers/misc/vmw_vmci/vmci_queue_pair.c:1351 [inline] qp_broker_alloc+0x936/0x2740 drivers/misc/vmw_vmci/vmci_queue_pair.c:1739 Reported-by: syzbot+15ec7391f3d6a1a7cc7d@syzkaller.appspotmail.com Signed-off-by: Sabyrzhan Tasbolatov <snovitoll@gmail.com> Link: https://lore.kernel.org/r/20210209102612.2112247-1-snovitoll@gmail.com Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.