Commit c86250bce29f introduced the useful '-T' option to print the log timestamp in human-readable form. However, this option does not work when crash is invoked with '--minimal' mode, and if tried, crash will spin at 100% and continuously crash at a divide by 0 because machdep->hz == 0. Fix this by disallowing this option in minimal mode. In addition, only calculate the logic to calculate kt->boot_date.tv_sec when this option is enabled. Fixes: c86250bce29f ("Introduction of the "log -T" option...") Signed-off-by: Dave Wysochanski <dwysocha(a)redhat.com&gt; Reviewed-by: Wang Long <w(a)laoqinren.net&gt; Tested-by: Mathias Krause <minipli(a)grsecurity.net&gt; --- kernel.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/kernel.c b/kernel.c index 5ed6021..95119f3 100644 --- a/kernel.c +++ b/kernel.c @@ -4939,7 +4939,10 @@ cmd_log(void) if (argerrs) cmd_usage(pc->curcmd, SYNOPSIS); - if (kt->boot_date.tv_sec == 0) { + if (msg_flags & SHOW_LOG_CTIME && pc->flags & MINIMAL_MODE) + error(FATAL, "log: option 'T' not available in minimal mode\n"); + + if (msg_flags & SHOW_LOG_CTIME && kt->boot_date.tv_sec == 0) { ulonglong uptime_jiffies; ulong uptime_sec; get_uptime(NULL, &uptime_jiffies); -- 2.27.0