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eb8f087201
[ Upstream commit 738216c1953e802aa9f930c5d15b8f9092c847ff ] In r592_remove(), the driver will free dma after freeing the host, which may cause a UAF bug. The following log reveals it: [ 45.361796 ] BUG: KASAN: use-after-free in r592_remove+0x269/0x350 [r592] [ 45.364286 ] Call Trace: [ 45.364472 ] dump_stack_lvl+0xa8/0xd1 [ 45.364751 ] print_address_description+0x87/0x3b0 [ 45.365137 ] kasan_report+0x172/0x1c0 [ 45.365415 ] ? r592_remove+0x269/0x350 [r592] [ 45.365834 ] ? r592_remove+0x269/0x350 [r592] [ 45.366168 ] __asan_report_load8_noabort+0x14/0x20 [ 45.366531 ] r592_remove+0x269/0x350 [r592] [ 45.378785 ] [ 45.378903 ] Allocated by task 4674: [ 45.379162 ] ____kasan_kmalloc+0xb5/0xe0 [ 45.379455 ] __kasan_kmalloc+0x9/0x10 [ 45.379730 ] __kmalloc+0x150/0x280 [ 45.379984 ] memstick_alloc_host+0x2a/0x190 [ 45.380664 ] [ 45.380781 ] Freed by task 5509: [ 45.381014 ] kasan_set_track+0x3d/0x70 [ 45.381293 ] kasan_set_free_info+0x23/0x40 [ 45.381635 ] ____kasan_slab_free+0x10b/0x140 [ 45.381950 ] __kasan_slab_free+0x11/0x20 [ 45.382241 ] slab_free_freelist_hook+0x81/0x150 [ 45.382575 ] kfree+0x13e/0x290 [ 45.382805 ] memstick_free+0x1c/0x20 [ 45.383070 ] device_release+0x9c/0x1d0 [ 45.383349 ] kobject_put+0x2ef/0x4c0 [ 45.383616 ] put_device+0x1f/0x30 [ 45.383865 ] memstick_free_host+0x24/0x30 [ 45.384162 ] r592_remove+0x242/0x350 [r592] [ 45.384473 ] pci_device_remove+0xa9/0x250 Signed-off-by: Zheyu Ma <zheyuma97@gmail.com> Link: https://lore.kernel.org/r/1634383581-11055-1-git-send-email-zheyuma97@gmail.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org> |
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| README | ||
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.