diff options
Diffstat (limited to 'kernel/kcsan/report.c')
| -rw-r--r-- | kernel/kcsan/report.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/kcsan/report.c b/kernel/kcsan/report.c index b5b4feea49de..33bdf8b229b5 100644 --- a/kernel/kcsan/report.c +++ b/kernel/kcsan/report.c @@ -2,6 +2,7 @@ #include <linux/jiffies.h> #include <linux/kernel.h> +#include <linux/lockdep.h> #include <linux/preempt.h> #include <linux/printk.h> #include <linux/sched.h> @@ -410,6 +411,14 @@ void kcsan_report(const volatile void *ptr, size_t size, int access_type, { unsigned long flags = 0; + /* + * With TRACE_IRQFLAGS, lockdep's IRQ trace state becomes corrupted if + * we do not turn off lockdep here; this could happen due to recursion + * into lockdep via KCSAN if we detect a data race in utilities used by + * lockdep. + */ + lockdep_off(); + kcsan_disable_current(); if (prepare_report(&flags, ptr, size, access_type, cpu_id, type)) { if (print_report(ptr, size, access_type, value_change, cpu_id, type) && panic_on_warn) @@ -418,4 +427,6 @@ void kcsan_report(const volatile void *ptr, size_t size, int access_type, release_report(&flags, type); } kcsan_enable_current(); + + lockdep_on(); } |