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| author | Jiasheng Jiang <jiasheng@iscas.ac.cn> | 2023-06-14 17:37:33 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-27 08:43:36 +0200 |
| commit | a14cb307267ba7a1715403e071bdc4deda77eef5 (patch) | |
| tree | 298591e3d94d5d62f7cef8064349e5e0108062c8 | |
| parent | 628709a05708918d17beddc9440b2d64320929c0 (diff) | |
| download | linux-stable-a14cb307267ba7a1715403e071bdc4deda77eef5.tar.gz linux-stable-a14cb307267ba7a1715403e071bdc4deda77eef5.tar.bz2 linux-stable-a14cb307267ba7a1715403e071bdc4deda77eef5.zip | |
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: 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>
| -rw-r--r-- | fs/pstore/ram_core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c index 184cb97c83bd..b6183f1f4ebc 100644 --- a/fs/pstore/ram_core.c +++ b/fs/pstore/ram_core.c @@ -577,6 +577,8 @@ 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) |