Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: fix refcount leak in xfrm_migrate_policy_find syzkaller reported a memory leak in xfrm_policy_alloc: BUG: memory leak unreferenced object 0xffff888114d79000 (size 1024): comm "syz.1.17", pid 931 ... xfrm_policy_alloc+0xb3/0x4b0 net/xfrm/xfrm_policy.c:432 The root cause is a double call to xfrm_pol_hold_rcu() in xfrm_migrate_policy_find(). The lookup function already returns a policy with held reference, making the second call redundant. Remove the redundant xfrm_pol_hold_rcu() call to fix the refcount imbalance and prevent the memory leak. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
563d5ca93e883b9dcb4b7dc8967ac569fd91820d to < 21e235a36cfb6d145cefb10728f12f5dc5412f54affected563d5ca93e883b9dcb4b7dc8967ac569fd91820d to < 836ee1b0426ea3db31531e9581cc32f513d24e32affected563d5ca93e883b9dcb4b7dc8967ac569fd91820d to < 70c2a89a3bc207c3bfbf6f21bb439809e0a4a27aaffected563d5ca93e883b9dcb4b7dc8967ac569fd91820d to < 83317cce60a032c49480dcdabe146435bd689d03affected
Linux Linux
Default version status: affected
6.12affected0 to < 6.12unaffected6.12.83 to ≤ 6.12.*unaffected6.18.24 to ≤ 6.18.*unaffected6.19.14 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected