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staging: rtl8723bs: os_dep: avoid NULL pointer dereference in rtw_cbuf_alloc

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The return value of kzalloc_flex() is used without
ensuring that the allocation succeeded, and the
pointer is dereferenced unconditionally.

Guard the access to the allocated structure to
avoid a potential NULL pointer dereference if the
allocation fails.

Fixes: 980cd426a2 ("staging: rtl8723bs: replace rtw_zmalloc() with kzalloc()")
Cc: stable <stable@kernel.org>
Signed-off-by: Shyam Sunder Reddy Padira <shyamsunderreddypadira@gmail.com>
Reviewed-by: Dan Carpenter <error27@gmail.com>
Link: https://patch.msgid.link/20260414071308.4781-2-shyamsunderreddypadira@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shyam Sunder Reddy Padira 2026-04-14 12:43:06 +05:30 committed by Greg Kroah-Hartman
parent 32c91e8ee0
commit bc851db060
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/rtl8723bs/os_dep/osdep_service.c
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@ -194,7 +194,8 @@ struct rtw_cbuf *rtw_cbuf_alloc(u32 size)
struct rtw_cbuf *cbuf;
cbuf = kzalloc_flex(*cbuf, bufs, size);
cbuf->size = size;
if (cbuf)
cbuf->size = size;
return cbuf;
}