CVE-2024-56741: apparmor: test: Fix memory leak for aa_unpack_strdup()
First published: Sun Dec 29 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: apparmor: test: Fix memory leak for aa_unpack_strdup() The string allocated by kmemdup() in aa_unpack_strdup() is not freed and cause following memory leaks, free them to fix it. unreferenced object 0xffffff80c6af8a50 (size 8): comm "kunit_try_catch", pid 225, jiffies 4294894407 hex dump (first 8 bytes): 74 65 73 74 69 6e 67 00 testing. backtrace (crc 5eab668b): [<0000000001e3714d>] kmemleak_alloc+0x34/0x40 [<000000006e6c7776>] __kmalloc_node_track_caller_noprof+0x300/0x3e0 [<000000006870467c>] kmemdup_noprof+0x34/0x60 [<000000001176bb03>] aa_unpack_strdup+0xd0/0x18c [<000000008ecde918>] policy_unpack_test_unpack_strdup_with_null_name+0xf8/0x3ec [<0000000032ef8f77>] kunit_try_run_case+0x13c/0x3ac [<00000000f3edea23>] kunit_generic_run_threadfn_adapter+0x80/0xec [<00000000adf936cf>] kthread+0x2e8/0x374 [<0000000041bb1628>] ret_from_fork+0x10/0x20 unreferenced object 0xffffff80c2a29090 (size 8): comm "kunit_try_catch", pid 227, jiffies 4294894409 hex dump (first 8 bytes): 74 65 73 74 69 6e 67 00 testing. backtrace (crc 5eab668b): [<0000000001e3714d>] kmemleak_alloc+0x34/0x40 [<000000006e6c7776>] __kmalloc_node_track_caller_noprof+0x300/0x3e0 [<000000006870467c>] kmemdup_noprof+0x34/0x60 [<000000001176bb03>] aa_unpack_strdup+0xd0/0x18c [<0000000046a45c1a>] policy_unpack_test_unpack_strdup_with_name+0xd0/0x3c4 [<0000000032ef8f77>] kunit_try_run_case+0x13c/0x3ac [<00000000f3edea23>] kunit_generic_run_threadfn_adapter+0x80/0xec [<00000000adf936cf>] kthread+0x2e8/0x374 [<0000000041bb1628>] ret_from_fork+0x10/0x20
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=5.6<5.10.231 | |
| Linux Linux kernel | >=5.11<5.15.174 | |
| Linux Linux kernel | >=5.16<6.1.120 | |
| Linux Linux kernel | >=6.2<6.6.64 | |
| Linux Linux kernel | >=6.7<6.11.11 | |
| Linux Linux kernel | >=6.12<6.12.2 |
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Reference Links
- https://git.kernel.org/stable/c/f856246ff6da25c4f8fdd73a9c875e878b085e9f
- https://git.kernel.org/stable/c/5354599855a9b5568e05ce686119ee3ff8b19bd5
- https://git.kernel.org/stable/c/89265f88701e54dde255ddf862093baeca57548c
- https://git.kernel.org/stable/c/2a9b68f2dc6812bd1b8880b5c00e60203d6f61f6
- https://git.kernel.org/stable/c/59a149e7c38e7b76616c8b333fc6aa5b6fb2293c
- https://git.kernel.org/stable/c/d62ee5739a66644b0e7f11e657d562458cdcdea3
- https://git.kernel.org/stable/c/7290f59231910ccba427d441a6e8b8c6f6112448
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