Commit 578bd4dfcda63d2ef15f025f1d5d55c0e56b9660
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834b2964b7
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kdb: Fix early debugging crash regression
The kdb_current legally be equal to NULL in the early boot of the x86
arch. The problem pcan be observed by booting with the kernel arguments:
earlyprintk=vga ekgdboc=kbd kgdbwait
The kdb shell will oops on entry and recursively fault because it
cannot get past the final stage of shell initialization.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Showing 1 changed file with 1 additions and 1 deletions Side-by-side Diff
kernel/debug/kdb/kdb_main.c
| ... | ... | @@ -1127,7 +1127,7 @@ |
| 1127 | 1127 | /* special case below */ |
| 1128 | 1128 | } else { |
| 1129 | 1129 | kdb_printf("\nEntering kdb (current=0x%p, pid %d) ", |
| 1130 | - kdb_current, kdb_current->pid); | |
| 1130 | + kdb_current, kdb_current ? kdb_current->pid : 0); | |
| 1131 | 1131 | #if defined(CONFIG_SMP) |
| 1132 | 1132 | kdb_printf("on processor %d ", raw_smp_processor_id()); |
| 1133 | 1133 | #endif |