diff options
| author | Ingo Molnar <mingo@kernel.org> | 2020-07-31 12:12:21 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-07-31 12:13:21 +0200 |
| commit | adb334d17858d8b679a41f7f2cd230e5c6accc0a (patch) | |
| tree | fd4fd188aedd4412b6d1097eb58e0a479bb97596 /kernel/kcsan/report.c | |
| parent | f3020b8891b890b48d9e1a83241e3cce518427c1 (diff) | |
| parent | f87032aec41e0b00ae5fa9103eb8e7b2d1f8416b (diff) | |
Merge branch 'WIP.x86/entry' into x86/entry, to merge the latest generic code and resolve conflictsx86-entry-2020-08-04
Pick up and resolve the NMI entry code changes from the locking tree,
and also pick up the latest two fixes from tip:core/entry.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/kcsan/report.c')
| -rw-r--r-- | kernel/kcsan/report.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/kernel/kcsan/report.c b/kernel/kcsan/report.c index ac5f8345bae9..6b2fb1a6d8cd 100644 --- a/kernel/kcsan/report.c +++ b/kernel/kcsan/report.c @@ -606,10 +606,11 @@ void kcsan_report(const volatile void *ptr, size_t size, int access_type, goto out; /* - * 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 race in utilities used by - * lockdep. + * Because we may generate reports when we're in scheduler code, the use + * of printk() could deadlock. Until such time that all printing code + * called in print_report() is scheduler-safe, accept the risk, and just + * get our message out. As such, also disable lockdep to hide the + * warning, and avoid disabling lockdep for the rest of the kernel. */ lockdep_off(); |