Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。 - qed允许 qed_mcp_trace_dump() 中的休眠默认情况下qed_mcp_cmd_and_union() 在可运行 500K 次的循环中一次延迟 10us因此对 qed_mcp_nvm_rd_cmd() 的调用可能会将当前线程阻断 5s 以上。我们发现在生产环境中存在超过 700 毫秒的线程计划延迟其堆栈跟踪指向此代码为元首。从 ethtool 调用 qed_mcp_trace_dump()因此允许休眠。它已可在调用 qed_mcp_cmd() 的 qed_mcp_halt() 中休眠。向 qed_find_nvram_image() 和 qed_nvram_read() 添加休眠参数以便其在 qed_mcp_trace_dump() 期间休眠。 qed_mcp_trace_get_meta_info() 和 qed_mcp_trace_read_meta() 仅由 qed_mcp_trace_dump() 调用允许这些函数休眠。我无法判断其他调用程序 (qed_grc_dump_mcp_hw_dump()) 是否可以休眠因此在调用这些函数时请将 b_can_sleep 设置为 false。我们添加到内核的自定义警告中的一个示例堆栈跟踪，显示了一个线程尽管需要重新调度但尚未调度：[ 2745.362925,17] ------------[ 从此处剪切]------------ [ 2745.362941,17] 警告：CPU：23 PID：5640 at arch/x86/kernel/irq.c:233 do_IRQ+0x15e/0x1a0() [ 2745.362946,17] 线程在 irq 99 后 744 毫秒内未重新调度 [ 2745.362956,17] 链接的模块：... [ 2745.363339,17] CPU：23 PID：5640 通信：lldpd 污染：P O 4.4.182+ #202104120910+6d1da174272d.61x [ 2745.363343,17] 硬件名称：FOXCONN MercuryB/Quicksilver 控制器，BIOS H11P1N09 07/08/2020 [ 2745.363346,17] 0000000000000000 ffff885ec07c3ed8 ffffffff8131eb2f ffff885ec07c3f20 [ 2745.363358,17] ffffffff81d14f64 ffff885ec07c3f10 ffffffff81072ac2 ffff88be98ed0000 [2745.363369,17] 0000000000000063 0000000000000174 0000000000000074 0000000000000000 [ 2745.363379,17] 调用跟踪：[ 2745.363382,17] [] dump_stack+0x8e/0xcf [ 2745.363393,17] [] warn_slowpath_common+0x82/0xc0 [ 2745.363398,17] [] warn_slowpath_fmt+0x4c/0x50 [ 2745.363404,17] [] ? rcu_irq_exit+0xae/0xc0 [2745.363408,17] [] do_IRQ+0x15e/0x1a0 [ 2745.363413,17] [] common_interrupt+0x89/0x89 [ 2745.363416,17] [] ? delay_tsc+0x24/0x50 [2745.363425,17] [] __udelay+0x34/0x40 [ 2745.363457,17] [] qed_mcp_cmd_and_union+0x36f/0x7d0 [qed] [ 2745.363473,17] [] qed_mcp_nvm_rd_cmd+0x4d/0x90 [qed] [ 2745.363490,17] [] qed_mcp_trace_dump+0x4a7/0x630 [qed] [ 2745.363504,17] [] ? qed_fw_asserts_dump+0x1d6/0x1f0 [qed] [ 2745.363520,17] [] qed_dbg_mcp_trace_get_dump_buf_size+0x37/0x80 [qed] [ 2745.363536,17] [] qed_dbg_feature_size+0x61/0xa0 [qed] [ 2745.363551,17] [] qed_dbg_all_data_size+0x247/0x260 [qed] [ 2745.363560,17] [] qede_get_regs_len+0x30/0x40 [qede] [ 2745.363566,17] [] ethtool_get_drvinfo+0xe3/0x190 [ 2745.363570,17] [] dev_ethtool+0x1362/0x2140 [ 2745.363575,17] [] ? finish_task_switch+0x76/0x260 [ 2745.363580,17] [] ? __schedule+0x3c6/0x9d0 [2745.363585,17] [] ? hrtimer_start_range_ns+0x1d0/0x370 [ 2745.363589,17] [] ? dev_get_by_name_rcu+0x6b/0x90 [ 2745.363594,17] [] dev_ioctl+0xe8/0x710 [ 2745.363599,17] [] sock_do_ioctl+0x48/0x60 [ 2745.363603,17] [] sock_ioctl+0x1c7/0x280 [ 2745.363608,17] [] ? seccomp_phase1+0x83/0x220 [ 2745.363612,17] [] do_vfs_ioctl+0x2b3/0x4e0 [2745.363616,17] [] SyS_ioctl+0x41/0x70 [ 2745.363619,17] [] entry_SYSCALL_64_fastpath+0x1e/0x79 [ 2745.363622,17] ---[ 结束跟踪 f6954aa440266421 ]--- (CVE-2023-53509) 请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

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