[Devel] [PATCH] fs/fuse kio: fix mapping dereference in a dead map

[Pavel Butsykin]

MAP_ARGS() contains reference to struct pcs_map_entry::mapping,
which can be NULL if map is dead.

#VSTOR-19267

Signed-off-by: Pavel Butsykin <pbutsykin at virtuozzo.com>
---
 fs/fuse/kio/pcs/pcs_map.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/fuse/kio/pcs/pcs_map.c b/fs/fuse/kio/pcs/pcs_map.c
index 817c7d6a9379..ad31d1222da3 100644
--- a/fs/fuse/kio/pcs/pcs_map.c
+++ b/fs/fuse/kio/pcs/pcs_map.c
@@ -1175,7 +1175,8 @@ void pcs_map_complete(struct pcs_map_entry *m, struct pcs_ioc_getmap *omap)
 	return;
 
 error:
-	TRACE(" map error: %d for " MAP_FMT "\n", error.value, MAP_ARGS(m));
+	TRACE("map error: %d, m:%p, index:%lu, state:%x\n", error.value, m,
+		m->index, m->state);
 	BUG_ON(!pcs_if_error(&error));
 
 	m->state &= ~PCS_MAP_RESOLVING;
-- 
2.15.1