CVE-2023-52637

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> can: j1939: Fix UAF in j1939_sk_match_filter during setsockopt(SO_J1939_FILTER)<br /> <br /> Lock jsk-&gt;sk to prevent UAF when setsockopt(..., SO_J1939_FILTER, ...)<br /> modifies jsk-&gt;filters while receiving packets.<br /> <br /> Following trace was seen on affected system:<br /> ==================================================================<br /> BUG: KASAN: slab-use-after-free in j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939]<br /> Read of size 4 at addr ffff888012144014 by task j1939/350<br /> <br /> CPU: 0 PID: 350 Comm: j1939 Tainted: G W OE 6.5.0-rc5 #1<br /> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014<br /> Call Trace:<br /> print_report+0xd3/0x620<br /> ? kasan_complete_mode_report_info+0x7d/0x200<br /> ? j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939]<br /> kasan_report+0xc2/0x100<br /> ? j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939]<br /> __asan_load4+0x84/0xb0<br /> j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939]<br /> j1939_sk_recv+0x20b/0x320 [can_j1939]<br /> ? __kasan_check_write+0x18/0x20<br /> ? __pfx_j1939_sk_recv+0x10/0x10 [can_j1939]<br /> ? j1939_simple_recv+0x69/0x280 [can_j1939]<br /> ? j1939_ac_recv+0x5e/0x310 [can_j1939]<br /> j1939_can_recv+0x43f/0x580 [can_j1939]<br /> ? __pfx_j1939_can_recv+0x10/0x10 [can_j1939]<br /> ? raw_rcv+0x42/0x3c0 [can_raw]<br /> ? __pfx_j1939_can_recv+0x10/0x10 [can_j1939]<br /> can_rcv_filter+0x11f/0x350 [can]<br /> can_receive+0x12f/0x190 [can]<br /> ? __pfx_can_rcv+0x10/0x10 [can]<br /> can_rcv+0xdd/0x130 [can]<br /> ? __pfx_can_rcv+0x10/0x10 [can]<br /> __netif_receive_skb_one_core+0x13d/0x150<br /> ? __pfx___netif_receive_skb_one_core+0x10/0x10<br /> ? __kasan_check_write+0x18/0x20<br /> ? _raw_spin_lock_irq+0x8c/0xe0<br /> __netif_receive_skb+0x23/0xb0<br /> process_backlog+0x107/0x260<br /> __napi_poll+0x69/0x310<br /> net_rx_action+0x2a1/0x580<br /> ? __pfx_net_rx_action+0x10/0x10<br /> ? __pfx__raw_spin_lock+0x10/0x10<br /> ? handle_irq_event+0x7d/0xa0<br /> __do_softirq+0xf3/0x3f8<br /> do_softirq+0x53/0x80<br /> <br /> <br /> __local_bh_enable_ip+0x6e/0x70<br /> netif_rx+0x16b/0x180<br /> can_send+0x32b/0x520 [can]<br /> ? __pfx_can_send+0x10/0x10 [can]<br /> ? __check_object_size+0x299/0x410<br /> raw_sendmsg+0x572/0x6d0 [can_raw]<br /> ? __pfx_raw_sendmsg+0x10/0x10 [can_raw]<br /> ? apparmor_socket_sendmsg+0x2f/0x40<br /> ? __pfx_raw_sendmsg+0x10/0x10 [can_raw]<br /> sock_sendmsg+0xef/0x100<br /> sock_write_iter+0x162/0x220<br /> ? __pfx_sock_write_iter+0x10/0x10<br /> ? __rtnl_unlock+0x47/0x80<br /> ? security_file_permission+0x54/0x320<br /> vfs_write+0x6ba/0x750<br /> ? __pfx_vfs_write+0x10/0x10<br /> ? __fget_light+0x1ca/0x1f0<br /> ? __rcu_read_unlock+0x5b/0x280<br /> ksys_write+0x143/0x170<br /> ? __pfx_ksys_write+0x10/0x10<br /> ? __kasan_check_read+0x15/0x20<br /> ? fpregs_assert_state_consistent+0x62/0x70<br /> __x64_sys_write+0x47/0x60<br /> do_syscall_64+0x60/0x90<br /> ? do_syscall_64+0x6d/0x90<br /> ? irqentry_exit+0x3f/0x50<br /> ? exc_page_fault+0x79/0xf0<br /> entry_SYSCALL_64_after_hwframe+0x6e/0xd8<br /> <br /> Allocated by task 348:<br /> kasan_save_stack+0x2a/0x50<br /> kasan_set_track+0x29/0x40<br /> kasan_save_alloc_info+0x1f/0x30<br /> __kasan_kmalloc+0xb5/0xc0<br /> __kmalloc_node_track_caller+0x67/0x160<br /> j1939_sk_setsockopt+0x284/0x450 [can_j1939]<br /> __sys_setsockopt+0x15c/0x2f0<br /> __x64_sys_setsockopt+0x6b/0x80<br /> do_syscall_64+0x60/0x90<br /> entry_SYSCALL_64_after_hwframe+0x6e/0xd8<br /> <br /> Freed by task 349:<br /> kasan_save_stack+0x2a/0x50<br /> kasan_set_track+0x29/0x40<br /> kasan_save_free_info+0x2f/0x50<br /> __kasan_slab_free+0x12e/0x1c0<br /> __kmem_cache_free+0x1b9/0x380<br /> kfree+0x7a/0x120<br /> j1939_sk_setsockopt+0x3b2/0x450 [can_j1939]<br /> __sys_setsockopt+0x15c/0x2f0<br /> __x64_sys_setsockopt+0x6b/0x80<br /> do_syscall_64+0x60/0x90<br /> entry_SYSCALL_64_after_hwframe+0x6e/0xd8