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kernel: fget: check that the fd still exists after getting a ref to it

🗓️ 19 Apr 2022 16:29:38Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 10 Views

A read after free flaw in Unix domain socket file handler GC causes a race between close and fget.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8ppc64lekpatch-patch-4_18_0-3051-12.el8kpatch-patch-4_18_0-305-1-12.el8.ppc64le.rpm
Red Hat Enterprise Linux8x86_64kpatch-patch-4_18_0-3051-12.el8kpatch-patch-4_18_0-305-1-12.el8.x86_64.rpm
Red Hat Enterprise Linux8ppc64lekpatch-patch-4_18_0-305-debuginfo1-12.el8kpatch-patch-4_18_0-305-debuginfo-1-12.el8.ppc64le.rpm
Red Hat Enterprise Linux8x86_64kpatch-patch-4_18_0-305-debuginfo1-12.el8kpatch-patch-4_18_0-305-debuginfo-1-12.el8.x86_64.rpm
Red Hat Enterprise Linux8ppc64lekpatch-patch-4_18_0-305-debugsource1-12.el8kpatch-patch-4_18_0-305-debugsource-1-12.el8.ppc64le.rpm
Red Hat Enterprise Linux8x86_64kpatch-patch-4_18_0-305-debugsource1-12.el8kpatch-patch-4_18_0-305-debugsource-1-12.el8.x86_64.rpm
Red Hat Enterprise Linux8.4ppc64lekpatch-patch-4_18_0-305_10_21-9.el8_4kpatch-patch-4_18_0-305_10_2-1-9.el8_4.ppc64le.rpm
Red Hat Enterprise Linux8.4x86_64kpatch-patch-4_18_0-305_10_21-9.el8_4kpatch-patch-4_18_0-305_10_2-1-9.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4ppc64lekpatch-patch-4_18_0-305_10_2-debuginfo1-9.el8_4kpatch-patch-4_18_0-305_10_2-debuginfo-1-9.el8_4.ppc64le.rpm
Red Hat Enterprise Linux8.4x86_64kpatch-patch-4_18_0-305_10_2-debuginfo1-9.el8_4kpatch-patch-4_18_0-305_10_2-debuginfo-1-9.el8_4.x86_64.rpm
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