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| Reporter | ksyblast | Assigned To | | |
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| Priority | normal | Severity | major | Reproducibility | always |
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| Status | closed | Resolution | won't fix | |
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| OS Version | 8.5.2111 | |
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| Summary | 0018368: 4.18.0-348.2.1 memory leak |
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| Description | We have noticed a significant memory leak using strongswan after upgrading to 4.18.0-348.2.1.el8_5.x86_64
Rollback to 4.18.0-305.3.1 fixes the issue.
I am not sure what exactly triggers the leak as I cannot reproduce it on a test server with one ipsec tunnel and low load. |
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| Steps To Reproduce | 1. strongswan with kernel 4.18.0-348.2.1 (U5.9.4/K4.18.0-348.2.1.el8_5.x86_64)
2. install several (could not reproduce with one) ipsec tunnels + gre interfaces, I can attach configs to test with if needed
3. produce some real load (could not reproduce with simple ping or iperf)
4. memory will slowly leak |
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| Additional Information | I have tried to investigate the issue with debug kernel and I see kmemleak flooded with the following, that's why I suspect ipsec (attached a bigger sample):
unreferenced object 0xffff888034696e80 (size 88):
comm "softirq", pid 0, jiffies 4294988744 (age 1475.918s)
hex dump (first 32 bytes):
01 00 00 00 01 00 00 00 00 00 00 00 4e 02 a0 9c ............N...
80 ba ad 2f 80 88 ff ff cb 93 4b 97 ff ff ff ff .../......K.....
backtrace:
[<000000002f241681>] kmem_cache_alloc+0xef/0x300
[<0000000033b21ffc>] secpath_dup+0x23/0x1d0
[<0000000004ded9bb>] secpath_set+0x9f/0x160
[<000000001476d24b>] xfrm_input+0x29c/0x2850
[<00000000bd5f25fe>] xfrm4_esp_rcv+0x9f/0x190
[<000000001afc6bf7>] ip_protocol_deliver_rcu+0x5ae/0x7d0
[<00000000913ba334>] ip_local_deliver_finish+0x222/0x330
[<000000005bd92736>] ip_local_deliver+0x326/0x410
[<00000000e031e119>] ip_rcv+0xa7d/0x123d
[<00000000f9ed8d16>] __netif_receive_skb_core+0x2051/0x3330
[<00000000b24f5f1c>] netif_receive_skb_internal+0xed/0x340
[<000000001ea19f44>] napi_gro_receive+0x27f/0x3c0
[<00000000d2e61b66>] xennet_poll+0x1a1b/0x2ac0 [xen_netfront]
[<00000000cccfb516>] __napi_poll+0x9f/0x520
[<0000000073da1556>] net_rx_action+0x36e/0x980
[<00000000f705dcfe>] __do_softirq+0x1cb/0xa4f
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| Tags | No tags attached. |
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