Kernel sources for Moto G9 (Play) (Guamp)
70249194f9
refcount_inc_not_zero() in bt_tags_iter() still may read one freed
request.
Fix the issue by the following approach:
1) hold a per-tags spinlock when reading ->rqs[tag] and calling
refcount_inc_not_zero in bt_tags_iter()
2) clearing stale request referred via ->rqs[tag] before freeing
request pool, the per-tags spinlock is held for clearing stale
->rq[tag]
So after we cleared stale requests, bt_tags_iter() won't observe
freed request any more, also the clearing will wait for pending
request reference.
The idea of clearing ->rqs[] is borrowed from John Garry's previous
patch and one recent David's patch.
Tested-by: John Garry <john.garry@huawei.com>
Reviewed-by: David Jeffery <djeffery@redhat.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>.
Bug: 197804811
Change-Id: If49478d7b05d3f5b0a26966ddf9ae764cf2fb6b0
[Upstream: cherry picked from commit bd63141d585bef14f4caf111f6d0e27fe2300ec6]
[Todd: refactored to avoid breaking KMI ]
Signed-off-by: Pradeep P V K <pragalla@codeaurora.org>
Signed-off-by: Todd Kjos <tkjos@google.com>
Git-commit: bb96e7f45dc6ac1d6ec12190f1f286e3014fb068
Git-repo: https://android.googlesource.com/kernel/common/
Signed-off-by: Pradeep P V K <quic_pragalla@quicinc.com>
(cherry picked from commit
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android | ||
arch | ||
block | ||
certs | ||
crypto | ||
Documentation | ||
drivers | ||
firmware | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
LICENSES | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
techpack | ||
tools | ||
usr | ||
virt | ||
.clang-format | ||
.cocciconfig | ||
.get_maintainer.ignore | ||
.gitattributes | ||
.gitignore | ||
.mailmap | ||
Android.bp | ||
AndroidKernel.mk | ||
build.config.aarch64 | ||
build.config.allmodconfig | ||
build.config.allmodconfig.aarch64 | ||
build.config.allmodconfig.arm | ||
build.config.allmodconfig.x86_64 | ||
build.config.arm | ||
build.config.common | ||
build.config.gki | ||
build.config.gki-debug.aarch64 | ||
build.config.gki-debug.x86_64 | ||
build.config.gki.aarch64 | ||
build.config.gki.x86_64 | ||
build.config.gki_kasan | ||
build.config.gki_kasan.aarch64 | ||
build.config.gki_kasan.x86_64 | ||
build.config.goldfish.arm | ||
build.config.goldfish.arm64 | ||
build.config.goldfish.mips | ||
build.config.goldfish.mips64 | ||
build.config.goldfish.x86 | ||
build.config.goldfish.x86_64 | ||
build.config.x86_64 | ||
COPYING | ||
CREDITS | ||
gen_headers_arm.bp | ||
gen_headers_arm64.bp | ||
Kbuild | ||
Kconfig | ||
kernel_headers.py | ||
MAINTAINERS | ||
Makefile | ||
README | ||
verity_dev_keys.x509 |
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. See Documentation/00-INDEX for a list of what is contained in each file. 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.