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CVE-2024-57977

memcg: fix soft lockup in the OOM process

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.4.291, 5.10.235, 5.15.179, 6.1.130, 6.6.80, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: memcg: fix soft lockup in the OOM process A soft lockup issue was found in the product with about 56,000 tasks were in the OOM cgroup, it was traversing them when the soft lockup was triggered. watchdog: BUG: soft lockup - CPU#2 stuck for 23s! [VM Thread:1503066] CPU: 2 PID: 1503066 Comm: VM Thread Kdump: loaded Tainted: G Hardware name: Huawei Cloud OpenStack Nova, BIOS RIP: 0010:console_unlock+0x343/0x540 RSP: 0000:ffffb751447db9a0 EFLAGS: 00000247 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00000000ffffffff RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000247 RBP: ffffffffafc71f90 R08: 0000000000000000 R09: 0000000000000040 R10: 0000000000000080 R11: 0000000000000000 R12: ffffffffafc74bd0 R13: ffffffffaf60a220 R14: 0000000000000247 R15: 0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2fe6ad91f0 CR3: 00000004b2076003 CR4: 0000000000360ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vprintk_emit+0x193/0x280 printk+0x52/0x6e dump_task+0x114/0x130 mem_cgroup_scan_tasks+0x76/0x100 dump_header+0x1fe/0x210 oom_kill_process+0xd1/0x100 out_of_memory+0x125/0x570 mem_cgroup_out_of_memory+0xb5/0xd0 try_charge+0x720/0x770 mem_cgroup_try_charge+0x86/0x180 mem_cgroup_try_charge_delay+0x1c/0x40 do_anonymous_page+0xb5/0x390 handle_mm_fault+0xc4/0x1f0 This is because thousands of processes are in the OOM cgroup, it takes a long time to traverse all of them. As a result, this lead to soft lockup in the OOM process. To fix this issue, call 'cond_resched' in the 'mem_cgroup_scan_tasks' function per 1000 iterations. For global OOM, call 'touch_softlockup_watchdog' per 1000 iterations to avoid this issue.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 9cbb78bb314360a860a8b23723971cb6fcb54176 · fixed in 72f2c0b7c152c2983ed51d48c3272cab4f34d965; From 9cbb78bb314360a860a8b23723971cb6fcb54176 · fixed in 110399858194c71f11afefad6e7be9e3876b284f; From 9cbb78bb314360a860a8b23723971cb6fcb54176 · fixed in a9042dbc1ed4bf25a5f5c699d10c3d676abf8ca2; From 9cbb78bb314360a860a8b23723971cb6fcb54176 · fixed in 0a09d56e1682c951046bf15542b3e9553046c9f6; From 9cbb78bb314360a860a8b23723971cb6fcb54176 · fixed in 972486d37169fe85035e81b8c5dff21f70df1173; From 9cbb78bb314360a860a8b23723971cb6fcb54176 · fixed in c3a3741db8c1202aa959c77df3a4c361612d1eb1; From 9cbb78bb314360a860a8b23723971cb6fcb54176 · fixed in 46576834291869457d4772bb7df72d7c2bb3d57f; From 9cbb78bb314360a860a8b23723971cb6fcb54176 · fixed in ade81479c7dda1ce3eedb215c78bc615bbd04f06

  • Linux Linux

    3.6

  • KernelLinux

    From 3.6.0 · fixed in 5.4.291; From 5.5.0 · fixed in 5.10.235; From 5.11.0 · fixed in 5.15.179; From 5.16.0 · fixed in 6.1.130; From 6.2.0 · fixed in 6.6.80; From 6.7.0 · fixed in 6.12.13; From 6.13.0 · fixed in 6.13.2

References 8

git.kernel.org