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[ Upstream commit 2ce35c0821afc2acd5ee1c3f60d149f8b2520ce8 ] On bsg command completion, bsg_job_done() was called while qla driver continued to access the bsg_job buffer. bsg_job_done() would free up resources that ended up being reused by other task while the driver continued to access the buffers. As a result, driver was reading garbage data. localhost kernel: BUG: KASAN: use-after-free in sg_next+0x64/0x80 localhost kernel: Read of size 8 at addr ffff8883228a3330 by task swapper/26/0 localhost kernel: localhost kernel: CPU: 26 PID: 0 Comm: swapper/26 Kdump: loaded Tainted: G OE --------- - - 4.18.0-193.el8.x86_64+debug #1 localhost kernel: Hardware name: HP ProLiant DL360 Gen9/ProLiant DL360 Gen9, BIOS P89 08/12/2016 localhost kernel: Call Trace: localhost kernel: <IRQ> localhost kernel: dump_stack+0x9a/0xf0 localhost kernel: print_address_description.cold.3+0x9/0x23b localhost kernel: kasan_report.cold.4+0x65/0x95 localhost kernel: debug_dma_unmap_sg.part.12+0x10d/0x2d0 localhost kernel: qla2x00_bsg_sp_free+0xaf6/0x1010 [qla2xxx] Link: https://lore.kernel.org/r/20210329085229.4367-6-njavali@marvell.com Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Quinn Tran <qutran@marvell.com> Signed-off-by: Saurav Kashyap <skashyap@marvell.com> Signed-off-by: Nilesh Javali <njavali@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.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.