CVE-2023-53831

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net: read sk-&gt;sk_family once in sk_mc_loop()<br /> <br /> syzbot is playing with IPV6_ADDRFORM quite a lot these days,<br /> and managed to hit the WARN_ON_ONCE(1) in sk_mc_loop()<br /> <br /> We have many more similar issues to fix.<br /> <br /> WARNING: CPU: 1 PID: 1593 at net/core/sock.c:782 sk_mc_loop+0x165/0x260<br /> Modules linked in:<br /> CPU: 1 PID: 1593 Comm: kworker/1:3 Not tainted 6.1.40-syzkaller #0<br /> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023<br /> Workqueue: events_power_efficient gc_worker<br /> RIP: 0010:sk_mc_loop+0x165/0x260 net/core/sock.c:782<br /> Code: 34 1b fd 49 81 c7 18 05 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 25 36 6d fd 4d 8b 37 eb 13 e8 db 33 1b fd 0b b3 01 eb 34 e8 d0 33 1b fd 45 31 f6 49 83 c6 38 4c 89 f0 48<br /> RSP: 0018:ffffc90000388530 EFLAGS: 00010246<br /> RAX: ffffffff846d9b55 RBX: 0000000000000011 RCX: ffff88814f884980<br /> RDX: 0000000000000102 RSI: ffffffff87ae5160 RDI: 0000000000000011<br /> RBP: ffffc90000388550 R08: 0000000000000003 R09: ffffffff846d9a65<br /> R10: 0000000000000002 R11: ffff88814f884980 R12: dffffc0000000000<br /> R13: ffff88810dbee000 R14: 0000000000000010 R15: ffff888150084000<br /> FS: 0000000000000000(0000) GS:ffff8881f6b00000(0000) knlGS:0000000000000000<br /> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<br /> CR2: 0000000020000180 CR3: 000000014ee5b000 CR4: 00000000003506e0<br /> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000<br /> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400<br /> Call Trace:<br /> <br /> [] ip6_finish_output2+0x33f/0x1ae0 net/ipv6/ip6_output.c:83<br /> [] __ip6_finish_output net/ipv6/ip6_output.c:200 [inline]<br /> [] ip6_finish_output+0x6c6/0xb10 net/ipv6/ip6_output.c:211<br /> [] NF_HOOK_COND include/linux/netfilter.h:298 [inline]<br /> [] ip6_output+0x2bc/0x3d0 net/ipv6/ip6_output.c:232<br /> [] dst_output include/net/dst.h:444 [inline]<br /> [] ip6_local_out+0x10f/0x140 net/ipv6/output_core.c:161<br /> [] ipvlan_process_v6_outbound drivers/net/ipvlan/ipvlan_core.c:483 [inline]<br /> [] ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:529 [inline]<br /> [] ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]<br /> [] ipvlan_queue_xmit+0x1174/0x1be0 drivers/net/ipvlan/ipvlan_core.c:677<br /> [] ipvlan_start_xmit+0x49/0x100 drivers/net/ipvlan/ipvlan_main.c:229<br /> [] netdev_start_xmit include/linux/netdevice.h:4925 [inline]<br /> [] xmit_one net/core/dev.c:3644 [inline]<br /> [] dev_hard_start_xmit+0x320/0x980 net/core/dev.c:3660<br /> [] sch_direct_xmit+0x2a0/0x9c0 net/sched/sch_generic.c:342<br /> [] qdisc_restart net/sched/sch_generic.c:407 [inline]<br /> [] __qdisc_run+0xb13/0x1e70 net/sched/sch_generic.c:415<br /> [] qdisc_run+0xd6/0x260 include/net/pkt_sched.h:125<br /> [] net_tx_action+0x7ac/0x940 net/core/dev.c:5247<br /> [] __do_softirq+0x2bd/0x9bd kernel/softirq.c:599<br /> [] invoke_softirq kernel/softirq.c:430 [inline]<br /> [] __irq_exit_rcu+0xc8/0x170 kernel/softirq.c:683<br /> [] irq_exit_rcu+0x9/0x20 kernel/softirq.c:695