[PATCH 2/4] libelf: elf32_getshdr might leak section header when out of memory

Mark Wielaard mark@klomp.org
Sat Jun 22 23:50:11 GMT 2024


Found by GCC -fanalyzer.

When allocating the notcvt buffer fails we leak the shdr. goto
free_and_out on malloc failure.

	     * libelf/elf32_getshdr.c (load_shdr_wrlock): goto
             free_and_out on second malloc failure.

Signed-off-by: Mark Wielaard <mark@klomp.org>
---
 libelf/elf32_getshdr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libelf/elf32_getshdr.c b/libelf/elf32_getshdr.c
index fc696302b8b6..19b690a8e87b 100644
--- a/libelf/elf32_getshdr.c
+++ b/libelf/elf32_getshdr.c
@@ -126,7 +126,7 @@ load_shdr_wrlock (Elf_Scn *scn)
 	      if (unlikely (notcvt == NULL))
 		{
 		  __libelf_seterrno (ELF_E_NOMEM);
-		  goto out;
+		  goto free_and_out;
 		}
 	      memcpy (notcvt, ((char *) elf->map_address
 			       + elf->start_offset + ehdr->e_shoff),
-- 
2.45.2



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