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| author | Jiasheng Jiang <jiasheng@iscas.ac.cn> | 2023-06-14 12:37:33 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-19 17:21:03 +0300 |
| commit | f57ba91a46d3fc52bfdac9cca5cf5572ec7afd6d (patch) | |
| tree | ca4e624888cfa1b7e6ad36fc3948c1f09539ee32 | |
| parent | 2672144b86a162f274320ae0e48bdf6f67497978 (diff) | |
| download | linux-f57ba91a46d3fc52bfdac9cca5cf5572ec7afd6d.tar.xz | |
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 8bf09886e7e6..2384de1c2d18 100644 --- a/fs/pstore/ram_core.c +++ b/fs/pstore/ram_core.c @@ -591,6 +591,8 @@ 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) |