15

记一次二进制乱起名字引发的翻车

 4 years ago
source link: https://xuanwo.io/2020/14-bug-introduced-by-binary-name/
Go to the source link to view the article. You can view the picture content, updated content and better typesetting reading experience. If the link is broken, please click the button below to view the snapshot at that time.
neoserver,ios ssh client

记一次二进制乱起名字引发的翻车

在某次日常 Syu 之后，我的 archlinux 难得的翻车了——重启之后进入了 BIOS 的锁屏介面：

bios_lock.jpg

第一直觉是自己的 EFI 被搞没了，于是一边在群里悲报，一边在家里找能用的 U 盘当 Archiso。硬盘挂载好，arch-chroot 进入，然后 bootctl 一看状态：

bootctl.jpg

噫，我的 vmlinuxz 和 initramfs 都没了，恐怕是内核更新之后 hook 没有更新成功。虽然还是想不太清楚原因，但是当时重新安装一遍内核之后就好了

yay -U /var/cache/pacman/pkg/linux-zen-x.x.x.zen1-1-x86_64.pkg.tar.zst

此事过去之后数天，又是一次内核更新，这次我留神注意了一下，果然 hook 执行失败了：

:) sudo pacman -S linux-zen
[sudo] password for xuanwo:
warning: linux-zen-5.9.4.zen1-1 is up to date -- reinstalling
resolving dependencies...
looking for conflicting packages...

Package (1)      Old Version   New Version   Net Change

extra/linux-zen  5.9.4.zen1-1  5.9.4.zen1-1    0.00 MiB

Total Installed Size:  82.48 MiB
Net Upgrade Size:       0.00 MiB

:: Proceed with installation? [Y/n]
(1/1) checking keys in keyring                                                                                      [#####################################################################] 100%
(1/1) checking package integrity                                                                                    [#####################################################################] 100%
(1/1) loading package files                                                                                         [#####################################################################] 100%
(1/1) checking for file conflicts                                                                                   [#####################################################################] 100%
(1/1) checking available disk space                                                                                 [#####################################################################] 100%
:: Processing package changes...
(1/1) reinstalling linux-zen                                                                                        [#####################################################################] 100%
:: Running post-transaction hooks...
(1/4) Arming ConditionNeedsUpdate...
(2/4) Updating module dependencies...
(3/4) Updating linux initcpios...
2020/11/07 13:41:58 open go.mod: open go.mod: no such file or directory
error: command failed to execute correctly
(4/4) Cleaning pacman cache...
==> no candidate packages found for pruning
sudo pacman -S linux-zen  6.04s user 0.75s system 66% cpu 10.217 total

为什么在内核更新的时候冒出来一个 open go.mod？掏出 strace 看看到底发生了什么：

[pid 347882] readlinkat(AT_FDCWD, "/proc/self/exe", "/home/xuanwo/Code/go/bin/install", 128) = 32
[pid 347882] fcntl(0, F_GETFL)          = 0x2 (flags O_RDWR)
[pid 347883] <... nanosleep resumed>NULL) = 0
[pid 347882] futex(0xc000080148, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
[pid 347883] nanosleep({tv_sec=0, tv_nsec=20000},  <unfinished ...>
[pid 347886] <... futex resumed>)       = 0
[pid 347882] <... futex resumed>)       = 1
[pid 347886] nanosleep({tv_sec=0, tv_nsec=3000},  <unfinished ...>
[pid 347882] mmap(NULL, 262144, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc077f0d000
[pid 347882] fcntl(1, F_GETFL <unfinished ...>
[pid 347883] <... nanosleep resumed>NULL) = 0
[pid 347882] <... fcntl resumed>)       = 0x2 (flags O_RDWR)
[pid 347886] <... nanosleep resumed>NULL) = 0
[pid 347883] nanosleep({tv_sec=0, tv_nsec=20000},  <unfinished ...>
[pid 347886] futex(0xc00003c948, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
[pid 347882] fcntl(2, F_GETFL <unfinished ...>
[pid 347886] <... futex resumed>)       = 1
[pid 347885] <... futex resumed>)       = 0
[pid 347882] <... fcntl resumed>)       = 0x2 (flags O_RDWR)
[pid 347886] futex(0xc000080148, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 347885] futex(0xc00003c948, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 347882] openat(AT_FDCWD, "go.mod", O_RDONLY|O_CLOEXEC <unfinished ...>

我勒个去。。

所以完整的故事是这样的：

我之前做某个项目的时候将生成的二进制命名为 install，然而这个命令跟 coreutils 包中携带的二进制 install 冲突了，于是更新系统的时候出现各种诡异状况：

  • 内核更新无法执行 hook 以构建 initramfs
  • 更新 aur 包的时候无法 install

二进制的名字真的不能随便起（

  • 我知道我毒奶了，LPL 再次在主场输给了韩国战队（
  • 美国大选终于结束了，拜登当选，川普败选
  • 天津来暖气了（

report

Recommend

About Joyk


Aggregate valuable and interesting links.
Joyk means Joy of geeK