Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: bonding: fix use-after-free after 802.3ad slave unbind commit 0622cab0341c ("bonding: fix 802.3ad aggregator reselection"), resolve case, when there is several aggregation groups in the same bond. bond_3ad_unbind_slave will invalidate (clear) aggregator when __agg_active_ports return zero. So, ad_clear_agg can be executed even, when num_of_ports!=0. Than bond_3ad_unbind_slave can be executed again for, previously cleared aggregator. NOTE: at this time bond_3ad_unbind_slave will not update slave ports list, because lag_ports==NULL. So, here we got slave ports, pointing to freed aggregator memory. Fix with checking actual number of ports in group (as was before commit 0622cab0341c ("bonding: fix 802.3ad aggregator reselection") ), before ad_clear_agg(). The KASAN logs are as follows: [ 767.617392] ================================================================== [ 767.630776] BUG: KASAN: use-after-free in bond_3ad_state_machine_handler+0x13dc/0x1470 [ 767.638764] Read of size 2 at addr ffff00011ba9d430 by task kworker/u8:7/767 [ 767.647361] CPU: 3 PID: 767 Comm: kworker/u8:7 Tainted: G O 5.15.11 #15 [ 767.655329] Hardware name: DNI AmazonGo1 A7040 board (DT) [ 767.660760] Workqueue: lacp_1 bond_3ad_state_machine_handler [ 767.666468] Call trace: [ 767.668930] dump_backtrace+0x0/0x2d0 [ 767.672625] show_stack+0x24/0x30 [ 767.675965] dump_stack_lvl+0x68/0x84 [ 767.679659] print_address_description.constprop.0+0x74/0x2b8 [ 767.685451] kasan_report+0x1f0/0x260 [ 767.689148] __asan_load2+0x94/0xd0 [ 767.692667] bond_3ad_state_machine_handler+0x13dc/0x1470
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0622cab0341cac6b30da177b0faa39fae0680e71 before a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1e; affected 0622cab0341cac6b30da177b0faa39fae0680e71 before b90ac60303063a43e17dd4aec159067599d255e6; affected 0622cab0341cac6b30da177b0faa39fae0680e71 before f162f7c348fa2a5555bafdb5cc890b89b221e69c; affected 0622cab0341cac6b30da177b0faa39fae0680e71 before 893825289ba840afd86bfffcb6f7f363c73efff8; affected 0622cab0341cac6b30da177b0faa39fae0680e71 before 63b2fe509f69b90168a75e04e14573dccf7984e6; affected 0622cab0341cac6b30da177b0faa39fae0680e71 before ef0af7d08d26c5333ff4944a559279464edf6f15; affected 0622cab0341cac6b30da177b0faa39fae0680e71 before 2765749def4765c5052a4c66445cf4c96fcccdbc; affected 0622cab0341cac6b30da177b0faa39fae0680e71 before 050133e1aa2cb49bb17be847d48a4431598ef562 |
| Linux / Linux | affected 4.7; unaffected 0 before 4.7; unaffected 4.9.322 through 4.9.*; unaffected 4.14.287 through 4.14.*; unaffected 4.19.251 through 4.19.*; unaffected 5.4.204 through 5.4.*; unaffected 5.10.129 through 5.10.*; unaffected 5.15.53 through 5.15.*; unaffected 5.18.10 through 5.18.*; unaffected 5.19 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1e
- https://git.kernel.org/stable/c/b90ac60303063a43e17dd4aec159067599d255e6
- https://git.kernel.org/stable/c/f162f7c348fa2a5555bafdb5cc890b89b221e69c
- https://git.kernel.org/stable/c/893825289ba840afd86bfffcb6f7f363c73efff8
- https://git.kernel.org/stable/c/63b2fe509f69b90168a75e04e14573dccf7984e6
- https://git.kernel.org/stable/c/ef0af7d08d26c5333ff4944a559279464edf6f15
- https://git.kernel.org/stable/c/2765749def4765c5052a4c66445cf4c96fcccdbc
- https://git.kernel.org/stable/c/050133e1aa2cb49bb17be847d48a4431598ef562
ADP enrichment
No English description supplied.
No references supplied.