CVE-2022-49784

NameCVE-2022-49784
DescriptionIn the Linux kernel, the following vulnerability has been resolved: perf/x86/amd/uncore: Fix memory leak for events array When a CPU comes online, the per-CPU NB and LLC uncore contexts are freed but not the events array within the context structure. This causes a memory leak as identified by the kmemleak detector. [...] unreferenced object 0xffff8c5944b8e320 (size 32): comm "swapper/0", pid 1, jiffies 4294670387 (age 151.072s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000000759fb79>] amd_uncore_cpu_up_prepare+0xaf/0x230 [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470 [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170 [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330 [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110 [<0000000015365e0f>] amd_uncore_init+0x260/0x321 [<00000000089152d2>] do_one_initcall+0x3f/0x1f0 [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212 [<0000000030be8dde>] kernel_init+0x11/0x120 [<0000000059709e59>] ret_from_fork+0x22/0x30 unreferenced object 0xffff8c5944b8dd40 (size 64): comm "swapper/0", pid 1, jiffies 4294670387 (age 151.072s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000306efe8b>] amd_uncore_cpu_up_prepare+0x183/0x230 [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470 [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170 [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330 [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110 [<0000000015365e0f>] amd_uncore_init+0x260/0x321 [<00000000089152d2>] do_one_initcall+0x3f/0x1f0 [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212 [<0000000030be8dde>] kernel_init+0x11/0x120 [<0000000059709e59>] ret_from_fork+0x22/0x30 [...] Fix the problem by freeing the events array before freeing the uncore context.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)bullseye5.10.223-1fixed
bullseye (security)5.10.237-1fixed
bookworm6.1.137-1fixed
bookworm (security)6.1.140-1fixed
trixie6.12.27-1fixed
sid6.12.30-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcebullseye(not affected)
linuxsource(unstable)6.0.10-1

Notes

[bullseye] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/bdfe34597139cfcecd47a2eb97fea44d77157491 (6.1-rc6)

Search for package or bug name: Reporting problems