CVE-2023-53853

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> netlink: annotate accesses to nlk-&gt;cb_running<br /> <br /> Both netlink_recvmsg() and netlink_native_seq_show() read<br /> nlk-&gt;cb_running locklessly. Use READ_ONCE() there.<br /> <br /> Add corresponding WRITE_ONCE() to netlink_dump() and<br /> __netlink_dump_start()<br /> <br /> syzbot reported:<br /> BUG: KCSAN: data-race in __netlink_dump_start / netlink_recvmsg<br /> <br /> write to 0xffff88813ea4db59 of 1 bytes by task 28219 on cpu 0:<br /> __netlink_dump_start+0x3af/0x4d0 net/netlink/af_netlink.c:2399<br /> netlink_dump_start include/linux/netlink.h:308 [inline]<br /> rtnetlink_rcv_msg+0x70f/0x8c0 net/core/rtnetlink.c:6130<br /> netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2577<br /> rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6192<br /> netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]<br /> netlink_unicast+0x56f/0x640 net/netlink/af_netlink.c:1365<br /> netlink_sendmsg+0x665/0x770 net/netlink/af_netlink.c:1942<br /> sock_sendmsg_nosec net/socket.c:724 [inline]<br /> sock_sendmsg net/socket.c:747 [inline]<br /> sock_write_iter+0x1aa/0x230 net/socket.c:1138<br /> call_write_iter include/linux/fs.h:1851 [inline]<br /> new_sync_write fs/read_write.c:491 [inline]<br /> vfs_write+0x463/0x760 fs/read_write.c:584<br /> ksys_write+0xeb/0x1a0 fs/read_write.c:637<br /> __do_sys_write fs/read_write.c:649 [inline]<br /> __se_sys_write fs/read_write.c:646 [inline]<br /> __x64_sys_write+0x42/0x50 fs/read_write.c:646<br /> do_syscall_x64 arch/x86/entry/common.c:50 [inline]<br /> do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80<br /> entry_SYSCALL_64_after_hwframe+0x63/0xcd<br /> <br /> read to 0xffff88813ea4db59 of 1 bytes by task 28222 on cpu 1:<br /> netlink_recvmsg+0x3b4/0x730 net/netlink/af_netlink.c:2022<br /> sock_recvmsg_nosec+0x4c/0x80 net/socket.c:1017<br /> ____sys_recvmsg+0x2db/0x310 net/socket.c:2718<br /> ___sys_recvmsg net/socket.c:2762 [inline]<br /> do_recvmmsg+0x2e5/0x710 net/socket.c:2856<br /> __sys_recvmmsg net/socket.c:2935 [inline]<br /> __do_sys_recvmmsg net/socket.c:2958 [inline]<br /> __se_sys_recvmmsg net/socket.c:2951 [inline]<br /> __x64_sys_recvmmsg+0xe2/0x160 net/socket.c:2951<br /> do_syscall_x64 arch/x86/entry/common.c:50 [inline]<br /> do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80<br /> entry_SYSCALL_64_after_hwframe+0x63/0xcd<br /> <br /> value changed: 0x00 -&gt; 0x01