CVE-2023-54024
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: Destroy target device if coalesced MMIO unregistration fails Destroy and free the target coalesced MMIO device if unregistering said device fails. As clearly noted in the code, kvm_io_bus_unregister_dev() does not destroy the target device. BUG: memory leak unreferenced object 0xffff888112a54880 (size 64): comm "syz-executor.2", pid 5258, jiffies 4297861402 (age 14.129s) hex dump (first 32 bytes): 38 c7 67 15 00 c9 ff ff 38 c7 67 15 00 c9 ff ff 8.g.....8.g..... e0 c7 e1 83 ff ff ff ff 00 30 67 15 00 c9 ff ff .........0g..... backtrace: [<0000000006995a8a>] kmalloc include/linux/slab.h:556 [inline] [<0000000006995a8a>] kzalloc include/linux/slab.h:690 [inline] [<0000000006995a8a>] kvm_vm_ioctl_register_coalesced_mmio+0x8e/0x3d0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:150 [<00000000022550c2>] kvm_vm_ioctl+0x47d/0x1600 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3323 [<000000008a75102f>] vfs_ioctl fs/ioctl.c:46 [inline] [<000000008a75102f>] file_ioctl fs/ioctl.c:509 [inline] [<000000008a75102f>] do_vfs_ioctl+0xbab/0x1160 fs/ioctl.c:696 [<0000000080e3f669>] ksys_ioctl+0x76/0xa0 fs/ioctl.c:713 [<0000000059ef4888>] __do_sys_ioctl fs/ioctl.c:720 [inline] [<0000000059ef4888>] __se_sys_ioctl fs/ioctl.c:718 [inline] [<0000000059ef4888>] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:718 [<000000006444fa05>] do_syscall_64+0x9f/0x4e0 arch/x86/entry/common.c:290 [<000000009a4ed50b>] entry_SYSCALL_64_after_hwframe+0x49/0xbe BUG: leak checking failed
How to fix
- Linux Linux10c2a20d73e99463e69b7e92706791656adc16d7, 76a9886e1b61ce5592df5ae78a19ed30399ae189, 999439fd5da5a76253e2f2c37b94204f47d75491, ccf6a7fb1aedb1472e1241ee55e4d26b68f8d066, fb436dd6914325075f07d19851ab277b7a693ae7, b1cb1fac22abf102ffeb29dd3eeca208a3869d54, 5.4.235, 5.10.173, 5.12, 5.13 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 7d1bc32d6477ff96a32695ea4be8144e4513ab2d ≤ v < 10c2a20d73e99463e69b7e92706791656adc16d7, 2a20592baff59c5351c5200ec667e1a2aa22af85 ≤ v < 76a9886e1b61ce5592df5ae78a19ed30399ae189, 5d3c4c79384af06e3c8e25b7770b6247496b4417 ≤ v < 999439fd5da5a76253e2f2c37b94204f47d75491, 5d3c4c79384af06e3c8e25b7770b6247496b4417 ≤ v < ccf6a7fb1aedb1472e1241ee55e4d26b68f8d066, 5d3c4c79384af06e3c8e25b7770b6247496b4417 ≤ v < fb436dd6914325075f07d19851ab277b7a693ae7, 5d3c4c79384af06e3c8e25b7770b6247496b4417 ≤ v < b1cb1fac22abf102ffeb29dd3eeca208a3869d54, 168e82f640ed1891a700bdb43e37da354b2ab63c, 50cbad42bfea8c052b7ca590bd4126cdc898713c, 5.4.119 ≤ v < 5.4.235, 5.10.37 ≤ v < 5.10.173, 5.11.21 ≤ v < 5.12, 5.12.4 ≤ v < 5.13, 5.13 | 10c2a20d73e99463e69b7e92706791656adc16d7, 76a9886e1b61ce5592df5ae78a19ed30399ae189, 999439fd5da5a76253e2f2c37b94204f47d75491, ccf6a7fb1aedb1472e1241ee55e4d26b68f8d066, fb436dd6914325075f07d19851ab277b7a693ae7, b1cb1fac22abf102ffeb29dd3eeca208a3869d54, 5.4.235, 5.10.173, 5.12, 5.13 |
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