diff options
Diffstat (limited to 'executor/executor_linux.h')
| -rw-r--r-- | executor/executor_linux.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/executor/executor_linux.h b/executor/executor_linux.h index bbc5dfff0..9a5d22423 100644 --- a/executor/executor_linux.h +++ b/executor/executor_linux.h @@ -366,6 +366,50 @@ static const char* setup_kcov_reset_ioctl() return error; } +static const char* setup_kdump() +{ + if (access("/boot/bzImageKexec", F_OK) != 0) + return "/boot/bzImageKexec is missing"; + if (access("/usr/sbin/makedumpfile", F_OK) != 0) + return "/usr/sbin/makedumpfile is missing"; + char cmdline[4096]; + int fd = open("/proc/cmdline", O_RDONLY); + if (fd < 0) + return "failed to open /proc/cmdline"; + ssize_t n = read(fd, cmdline, sizeof(cmdline) - 1); + close(fd); + if (n <= 0) + return "failed to read /proc/cmdline"; + cmdline[n] = 0; + if (strstr(cmdline, "crashkernel=") == NULL) + return "crashkernel= is not present in /proc/cmdline"; + + // Current default values + char root[128] = "/dev/sda1"; + char console[128] = "ttyS0"; + get_last_opt(cmdline, "root", root, sizeof(root)); + get_last_opt(cmdline, "console", console, sizeof(console)); + + char cmd[1024]; + snprintf(cmd, sizeof(cmd), + "kexec -p /boot/bzImageKexec --append=\"earlyprintk=serial net.ifnames=0 ima_policy=tcb no_hash_pointers root=%s console=%s vsyscall=native watchdog_thresh=55 irqpoll nr_cpus=1 reset_devices\"", + root, console); + + if (system(cmd) != 0) + return "kexec failed"; + int s_fd = open("/sys/kernel/kexec_crash_loaded", O_RDONLY); + if (s_fd >= 0) { + char loaded_status[1]; + ssize_t sn = read(s_fd, loaded_status, sizeof(loaded_status)); + close(s_fd); + if (sn != 1) + return "failed to read /sys/kernel/kexec_crash_loaded"; + if (loaded_status[0] != '1') + return "/sys/kernel/kexec_crash_loaded is not 1"; + } + return NULL; +} + #define SYZ_HAVE_FEATURES 1 static feature_t features[] = { {rpc::Feature::DelayKcovMmap, setup_delay_kcov}, @@ -379,4 +423,5 @@ static feature_t features[] = { {rpc::Feature::Swap, setup_swap}, {rpc::Feature::NicVF, setup_nicvf}, {rpc::Feature::DevlinkPCI, setup_devlink_pci}, + {rpc::Feature::MemoryDump, setup_kdump}, }; |