Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
ata: libata-core: Fix double free on error
If e.g. the ata_port_alloc() call in ata_host_alloc() fails, we will jump to the err_out label, which will call devres_release_group(). devres_release_group() will trigger a call to ata_host_release(). ata_host_release() calls kfree(host), so executing the kfree(host) in ata_host_alloc() will lead to a double free:
kernel BUG at mm/slub.c:553! Oops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI CPU: 11 PID: 599 Comm: (udev-worker) Not tainted 6.10.0-rc5 #47 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 04/01/2014 RIP: 0010:kfree+0x2cf/0x2f0 Code: 5d 41 5e 41 5f 5d e9 80 d6 ff ff 4d 89 f1 41 b8 01 00 00 00 48 89 d9 48 89 da RSP: 0018:ffffc90000f377f0 EFLAGS: 00010246 RAX: ffff888112b1f2c0 RBX: ffff888112b1f2c0 RCX: ffff888112b1f320 RDX: 000000000000400b RSI: ffffffffc02c9de5 RDI: ffff888112b1f2c0 RBP: ffffc90000f37830 R08: 0000000000000000 R09: 0000000000000000 R10: ffffc90000f37610 R11: 617461203a736b6e R12: ffffea00044ac780 R13: ffff888100046400 R14: ffffffffc02c9de5 R15: 0000000000000006 FS: 00007f2f1cabe980(0000) GS:ffff88813b380000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2f1c3acf75 CR3: 0000000111724000 CR4: 0000000000750ef0 PKRU: 55555554 Call Trace: <TASK> ? __die_body.cold+0x19/0x27 ? die+0x2e/0x50 ? do_trap+0xca/0x110 ? do_error_trap+0x6a/0x90 ? kfree+0x2cf/0x2f0 ? exc_invalid_op+0x50/0x70 ? kfree+0x2cf/0x2f0 ? asm_exc_invalid_op+0x1a/0x20 ? ata_host_alloc+0xf5/0x120 [libata] ? ata_host_alloc+0xf5/0x120 [libata] ? kfree+0x2cf/0x2f0 ata_host_alloc+0xf5/0x120 [libata] ata_host_alloc_pinfo+0x14/0xa0 [libata] ahci_init_one+0x6c9/0xd20 [ahci]
Ensure that we will not call kfree(host) twice, by performing the kfree() only if the devres_open_group() call failed.
Details
- Affected product:
- AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , Debian 10 ELS , Oracle Linux 7 ELS , TuxCare 9.6 ESU , Ubuntu 16.04 ELS , Ubuntu 18.04 ELS , Ubuntu 20.04 ELS
- Affected packages:
- linux @ 4.19.0 (+10 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| Amazon Linux 2023 | Planned | — |
| Amazon Linux 2 5.10 | Will Not Fix | — |
| Amazon Linux 2 5.4 | Will Not Fix | — |
| Oracle Linux 7 UEK 6 | Released |
102 kernels
|
| Oracle Linux 8 UEK 6 | Released |
103 kernels
|
| Oracle Linux 8 UEK 7 | Released |
39 kernels
|
| Oracle Linux 9 UEK 7 | Released |
39 kernels
|
| Proxmox VE 7 5.15 | Released |
47 kernels
|
| Ubuntu 18.04 AWS Focal | Released |
56 kernels
|
| Ubuntu 18.04 Azure Focal | Released |
58 kernels
|
| Ubuntu 18.04 HWE Focal | Released |
69 kernels
|
| Ubuntu 18.04 HWE GCP | Released |
15 kernels
|
| Ubuntu 20.04 | Released |
114 kernels
|
| Ubuntu 20.04 AWS | Released |
97 kernels
|
| Ubuntu 20.04 Azure | Released |
88 kernels
|
| Ubuntu 20.04 GCP | Released |
20 kernels
|
| Ubuntu 20.04 HWE AWS | Released |
45 kernels
|
| Ubuntu 20.04 HWE Azure | Released |
28 kernels
|
| Ubuntu 22.04 | Released |
58 kernels
|
| Ubuntu 22.04 AWS | Released |
52 kernels
|
| Ubuntu 22.04 Azure | Released |
48 kernels
|
| Ubuntu 24.04 | Released |
10 kernels
|