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Commit 8430a8e8 authored by Jiasheng Jiang's avatar Jiasheng Jiang Committed by Greg Kroah-Hartman
Browse files

pstore/ram: Add check for kstrdup 



[ Upstream commit d97038d5ec2062733c1e016caf9baaf68cf64ea1 ]

Add check for the return value of kstrdup() and return the error
if it fails in order to avoid NULL pointer dereference.

Fixes: e163fdb3f7f8 ("pstore/ram: Regularize prz label allocation lifetime")
Signed-off-by: default avatarJiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230614093733.36048-1-jiasheng@iscas.ac.cn


Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 540cdd72

fs/pstore/ram_core.c

+2 −0
Original line number Diff line number Diff line
@@ -579,6 +579,8 @@ struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size, 
	raw_spin_lock_init(&prz->buffer_lock);

	prz->flags = flags;

	prz->label = kstrdup(label, GFP_KERNEL);

	if (!prz->label)

		goto err;



	ret = persistent_ram_buffer_map(start, size, prz, memtype);

	if (ret)