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  1. root@ubuntu16-grsec:~# cat /proc/version
  2. Linux version 4.4.0-47-generic (buildd@lcy01-03) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.2) ) #68-Ubuntu SMP Wed Oct 26 19:39:52 UTC 2016
  3.  
  4. root@ubuntu16-grsec:~# cat /sys/kernel/kexec_crash_loaded
  5. 0
  6. root@ubuntu16-grsec:~# strace kexec --load-panic --reuse-cmdline --initrd=/boot/initrd.img-4.8.11-grsec /boot/vmlinuz-4.8.11-grsec
  7. execve("/sbin/kexec", ["kexec", "--load-panic", "--reuse-cmdline", "--initrd=/boot/initrd.img-4.8.11"..., "/boot/vmlinuz-4.8.11-grsec"], [/* 14 vars */]) = 0
  8. brk(NULL)                               = 0x1426000
  9. access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
  10. mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f048cad8000
  11. access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
  12. open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
  13. fstat(3, {st_mode=S_IFREG|0644, st_size=21007, ...}) = 0
  14. mmap(NULL, 21007, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f048cad2000
  15. close(3)                                = 0
  16. access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
  17. open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
  18. read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832
  19. fstat(3, {st_mode=S_IFREG|0755, st_size=1864888, ...}) = 0
  20. mmap(NULL, 3967392, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f048c4ec000
  21. mprotect(0x7f048c6ab000, 2097152, PROT_NONE) = 0
  22. mmap(0x7f048c8ab000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bf000) = 0x7f048c8ab000
  23. mmap(0x7f048c8b1000, 14752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f048c8b1000
  24. close(3)                                = 0
  25. mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f048cad1000
  26. mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f048cad0000
  27. mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f048cacf000
  28. arch_prctl(ARCH_SET_FS, 0x7f048cad0700) = 0
  29. mprotect(0x7f048c8ab000, 16384, PROT_READ) = 0
  30. mprotect(0x626000, 4096, PROT_READ)     = 0
  31. mprotect(0x7f048cada000, 4096, PROT_READ) = 0
  32. munmap(0x7f048cad2000, 21007)           = 0
  33. access("/proc/xen", F_OK)               = -1 ENOENT (No such file or directory)
  34. brk(NULL)                               = 0x1426000
  35. brk(0x1447000)                          = 0x1447000
  36. open("/proc/iomem", O_RDONLY)           = 3
  37. fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
  38. read(3, "00000100-00000fff : reserved\n000"..., 1024) = 810
  39. read(3, "", 1024)                       = 0
  40. close(3)                                = 0
  41. open("/boot/vmlinuz-4.8.11-grsec", O_RDONLY) = 3
  42. fstat(3, {st_mode=S_IFREG|0644, st_size=7061200, ...}) = 0
  43. mmap(NULL, 7061504, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f048be30000
  44. read(3, "MZ\352\7\0\300\7\214\310\216\330\216\300\216\3201\344\373\374\276@\0\254 \300t\t\264\16\273\7\0"..., 7061200) = 7061200
  45. close(3)                                = 0
  46. open("/proc/cmdline", O_RDONLY)         = 3
  47. fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
  48. read(3, "root=UUID=e990f8b3-1d6b-4615-828"..., 1024) = 100
  49. close(3)                                = 0
  50. stat("/sys/firmware/memmap", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
  51. open("/sys/firmware/memmap", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
  52. fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
  53. getdents(3, /* 9 entries */, 32768)     = 216
  54. open("/sys/firmware/memmap/0/start", O_RDONLY) = 4
  55. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  56. read(4, "0x100\n", 4096)                = 6
  57. close(4)                                = 0
  58. open("/sys/firmware/memmap/0/end", O_RDONLY) = 4
  59. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  60. read(4, "0x9fbff\n", 4096)              = 8
  61. close(4)                                = 0
  62. open("/sys/firmware/memmap/0/type", O_RDONLY) = 4
  63. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  64. read(4, "System RAM\n", 4096)           = 11
  65. close(4)                                = 0
  66. open("/sys/firmware/memmap/1/start", O_RDONLY) = 4
  67. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  68. read(4, "0x9fc00\n", 4096)              = 8
  69. close(4)                                = 0
  70. open("/sys/firmware/memmap/1/end", O_RDONLY) = 4
  71. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  72. read(4, "0x9ffff\n", 4096)              = 8
  73. close(4)                                = 0
  74. open("/sys/firmware/memmap/1/type", O_RDONLY) = 4
  75. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  76. read(4, "reserved\n", 4096)             = 9
  77. close(4)                                = 0
  78. open("/sys/firmware/memmap/2/start", O_RDONLY) = 4
  79. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  80. read(4, "0xf0000\n", 4096)              = 8
  81. close(4)                                = 0
  82. open("/sys/firmware/memmap/2/end", O_RDONLY) = 4
  83. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  84. read(4, "0xfffff\n", 4096)              = 8
  85. close(4)                                = 0
  86. open("/sys/firmware/memmap/2/type", O_RDONLY) = 4
  87. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  88. read(4, "reserved\n", 4096)             = 9
  89. close(4)                                = 0
  90. open("/sys/firmware/memmap/3/start", O_RDONLY) = 4
  91. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  92. read(4, "0x100000\n", 4096)             = 9
  93. close(4)                                = 0
  94. open("/sys/firmware/memmap/3/end", O_RDONLY) = 4
  95. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  96. read(4, "0x7ffdefff\n", 4096)           = 11
  97. close(4)                                = 0
  98. open("/sys/firmware/memmap/3/type", O_RDONLY) = 4
  99. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  100. read(4, "System RAM\n", 4096)           = 11
  101. close(4)                                = 0
  102. open("/sys/firmware/memmap/4/start", O_RDONLY) = 4
  103. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  104. read(4, "0x7ffdf000\n", 4096)           = 11
  105. close(4)                                = 0
  106. open("/sys/firmware/memmap/4/end", O_RDONLY) = 4
  107. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  108. read(4, "0x7fffffff\n", 4096)           = 11
  109. close(4)                                = 0
  110. open("/sys/firmware/memmap/4/type", O_RDONLY) = 4
  111. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  112. read(4, "reserved\n", 4096)             = 9
  113. close(4)                                = 0
  114. open("/sys/firmware/memmap/5/start", O_RDONLY) = 4
  115. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  116. read(4, "0xfeffc000\n", 4096)           = 11
  117. close(4)                                = 0
  118. open("/sys/firmware/memmap/5/end", O_RDONLY) = 4
  119. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  120. read(4, "0xfeffffff\n", 4096)           = 11
  121. close(4)                                = 0
  122. open("/sys/firmware/memmap/5/type", O_RDONLY) = 4
  123. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  124. read(4, "reserved\n", 4096)             = 9
  125. close(4)                                = 0
  126. open("/sys/firmware/memmap/6/start", O_RDONLY) = 4
  127. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  128. read(4, "0xfffc0000\n", 4096)           = 11
  129. close(4)                                = 0
  130. open("/sys/firmware/memmap/6/end", O_RDONLY) = 4
  131. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  132. read(4, "0xffffffff\n", 4096)           = 11
  133. close(4)                                = 0
  134. open("/sys/firmware/memmap/6/type", O_RDONLY) = 4
  135. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  136. read(4, "reserved\n", 4096)             = 9
  137. close(4)                                = 0
  138. getdents(3, /* 0 entries */, 32768)     = 0
  139. close(3)                                = 0
  140. uname({sysname="Linux", nodename="ubuntu16-grsec", ...}) = 0
  141. open("/proc/cmdline", O_RDONLY)         = 3
  142. fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
  143. read(3, "root=UUID=e990f8b3-1d6b-4615-828"..., 1024) = 100
  144. close(3)                                = 0
  145. open("/boot/initrd.img-4.8.11-grsec", O_RDONLY) = 3
  146. fstat(3, {st_mode=S_IFREG|0644, st_size=27202041, ...}) = 0
  147. mmap(NULL, 27205632, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f048a43e000
  148. read(3, "\37\213\10\0\267\"<X\0\3\244\232ol\34\307u\300W\224d\221\227&fl\307V\\\377\31\235"..., 27202041) = 27202041
  149. close(3)                                = 0
  150. open("/proc/iomem", O_RDONLY)           = 3
  151. fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
  152. read(3, "00000100-00000fff : reserved\n000"..., 1024) = 810
  153. read(3, "", 1024)                       = 0
  154. close(3)                                = 0
  155. uname({sysname="Linux", nodename="ubuntu16-grsec", ...}) = 0
  156. open("/proc/iomem", O_RDONLY)           = 3
  157. fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
  158. read(3, "00000100-00000fff : reserved\n000"..., 1024) = 810
  159. read(3, "", 1024)                       = 0
  160. close(3)                                = 0
  161. open("/proc/kcore", O_RDONLY)           = 3
  162. read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\4\0>\0\1\0\0\0\0\0\0\0\0\0\0\0"..., 32768) = 32768
  163. close(3)                                = 0
  164. open("/proc/kallsyms", O_RDONLY)        = 3
  165. fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
  166. read(3, "0000000000000000 A irq_stack_uni"..., 1024) = 1024
  167. read(3, "n_current_cr3\n000000000000c4c0 A"..., 1024) = 1024
  168. read(3, "\n000000000000d348 A debug_stack_"..., 1024) = 1024
  169. read(3, "c_eoi\n000000000000d940 A steal_t"..., 1024) = 1024
  170. read(3, "tk_pending\n000000000000dc90 A pr"..., 1024) = 1024
  171. read(3, "seqnum\n000000000000f400 A idle_r"..., 1024) = 1024
  172. read(3, "add_drain_work\n0000000000010920 "..., 1024) = 1024
  173. read(3, "eload_head\n00000000000111e0 A nm"..., 1024) = 1024
  174. read(3, "c0 A od_cpu_dbs_info\n00000000000"..., 1024) = 1024
  175. read(3, "00000000017840 A mcs_nodes\n00000"..., 1024) = 1024
  176. mmap(NULL, 651264, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f048ca30000
  177. open("/sys/devices/system/cpu", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 4
  178. fstat(4, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
  179. getdents(4, /* 18 entries */, 32768)    = 528
  180. getdents(4, /* 0 entries */, 32768)     = 0
  181. close(4)                                = 0
  182. open("/sys/kernel/vmcoreinfo", O_RDONLY) = 4
  183. fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
  184. read(4, "7f16c140 1024\n", 4096)        = 14
  185. close(4)                                = 0
  186. open("/sys/devices/system/cpu/cpu0/crash_notes", O_RDONLY) = 4
  187. fstat(4, {st_mode=S_IFREG|0400, st_size=4096, ...}) = 0
  188. read(4, "7f41b600\n", 4096)             = 9
  189. close(4)                                = 0
  190. open("/sys/devices/system/cpu/cpu0/crash_notes_size", O_RDONLY) = 4
  191. fstat(4, {st_mode=S_IFREG|0400, st_size=4096, ...}) = 0
  192. read(4, "368\n", 4096)                  = 4
  193. close(4)                                = 0
  194. open("/sys/devices/system/cpu/cpu1/crash_notes", O_RDONLY) = 4
  195. fstat(4, {st_mode=S_IFREG|0400, st_size=4096, ...}) = 0
  196. read(4, "7f49b600\n", 4096)             = 9
  197. close(4)                                = 0
  198. open("/sys/devices/system/cpu/cpu1/crash_notes_size", O_RDONLY) = 4
  199. fstat(4, {st_mode=S_IFREG|0400, st_size=4096, ...}) = 0
  200. read(4, "368\n", 4096)                  = 4
  201. close(4)                                = 0
  202. open("/sys/devices/system/cpu/cpu2/crash_notes", O_RDONLY) = 4
  203. fstat(4, {st_mode=S_IFREG|0400, st_size=4096, ...}) = 0
  204. read(4, "7f51b600\n", 4096)             = 9
  205. close(4)                                = 0
  206. open("/sys/devices/system/cpu/cpu2/crash_notes_size", O_RDONLY) = 4
  207. fstat(4, {st_mode=S_IFREG|0400, st_size=4096, ...}) = 0
  208. read(4, "368\n", 4096)                  = 4
  209. close(4)                                = 0
  210. open("/sys/devices/system/cpu/cpu3/crash_notes", O_RDONLY) = 4
  211. fstat(4, {st_mode=S_IFREG|0400, st_size=4096, ...}) = 0
  212. read(4, "7f59b600\n", 4096)             = 9
  213. close(4)                                = 0
  214. open("/sys/devices/system/cpu/cpu3/crash_notes_size", O_RDONLY) = 4
  215. fstat(4, {st_mode=S_IFREG|0400, st_size=4096, ...}) = 0
  216. read(4, "368\n", 4096)                  = 4
  217. close(4)                                = 0
  218. open("/sys/firmware/efi/runtime-map", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
  219. open("/sys/firmware/efi/systab", O_RDONLY) = -1 ENOENT (No such file or directory)
  220. open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
  221. fstat(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
  222. read(4, "sysfs /sys sysfs rw,nosuid,nodev"..., 1024) = 1024
  223. close(4)                                = 0
  224. access("/sys/kernel/boot_params/data", F_OK) = 0
  225. open("/sys/kernel/boot_params/data", O_RDONLY) = 4
  226. lseek(4, 572, SEEK_SET)                 = 572
  227. read(4, "\0\0\0\0", 4)                  = 4
  228. close(4)                                = 0
  229. open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
  230. fstat(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
  231. read(4, "sysfs /sys sysfs rw,nosuid,nodev"..., 1024) = 1024
  232. close(4)                                = 0
  233. access("/sys/kernel/boot_params/data", F_OK) = 0
  234. open("/sys/kernel/boot_params/data", O_RDONLY) = 4
  235. lseek(4, 448, SEEK_SET)                 = 448
  236. read(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32) = 32
  237. close(4)                                = 0
  238. open("/dev/fb0", O_RDONLY)              = -1 ENOENT (No such file or directory)
  239. open("/sys/firmware/edd", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
  240. kexec_load(0x37f53760, 6, [{0x7f048a43e010, 27202041, 0x3460e000, 27205632}, {0x7f048be34410, 7043792, 0x36000000, 29360128}, {0x143dc40, 17569, 0x37f4e000, 20480}, {0x1435ae0, 32992, 0x37f53000, 40960}, {0x14351b0, 1024, 0x37f5d000, 16384}, {0x7f048ca30010, 650240, 0x37f61000, 651264}], KEXEC_ARCH_X86_64|KEXEC_ON_CRASH) = 0
  241. lseek(3, -230, SEEK_CUR)                = 10010
  242. exit_group(0)                           = ?
  243. +++ exited with 0 +++
  244. root@ubuntu16-grsec:~# cat /sys/kernel/kexec_crash_loaded
  245. 1
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