pstore/ram: Add check for kstrdup
[ Upstream commitd97038d5ec
] Add check for the return value of kstrdup() and return the error if it fails in order to avoid NULL pointer dereference. Fixes:e163fdb3f7
("pstore/ram: Regularize prz label allocation lifetime") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20230614093733.36048-1-jiasheng@iscas.ac.cn Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -599,6 +599,8 @@ struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
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raw_spin_lock_init(&prz->buffer_lock);
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prz->flags = flags;
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prz->label = kstrdup(label, GFP_KERNEL);
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if (!prz->label)
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goto err;
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ret = persistent_ram_buffer_map(start, size, prz, memtype);
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if (ret)
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