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Subject[PATCH v2 3/3] mm: vmalloc: Replace BUG_ON() by WARN_ON_ONCE()
Date
Currently a vm_unmap_ram() functions triggers a BUG() if an area
is not found. Replace it by the WARN_ON_ONCE() error message and
keep machine alive instead of stopping it.

The worst case is a memory leaking.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
mm/vmalloc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 17e688cc7357..221d8950e13c 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2252,7 +2252,9 @@ void vm_unmap_ram(const void *mem, unsigned int count)
}

va = find_unlink_vmap_area(addr);
- BUG_ON(!va);
+ if (WARN_ON_ONCE(!va))
+ return;
+
debug_check_no_locks_freed((void *)va->va_start,
(va->va_end - va->va_start));
free_unmap_vmap_area(va);
--
2.30.2
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