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mm: vmalloc: replace BUG_ON() by WARN_ON_ONCE()

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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.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Uladzislau Rezki (Sony) <[email protected]>
Reviewed-by: Lorenzo Stoakes <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Matthew Wilcox (Oracle) <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Oleksiy Avramchenko <[email protected]>
Cc: Roman Gushchin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
This commit is contained in:
Uladzislau Rezki (Sony) authored and Andrew Morton committed 2023-01-18 17:12:48 -08:00
1 parent edd898181e
commit 14687619e1
1 file changed
+3 -1
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mm/vmalloc.c
+3 -1
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@@ -2253,7 +2253,9 @@ 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);