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apparmor: make sure the decompression ctx is promperly initialized

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The decompress ctx was not properly initialized when reading raw
profile data back to userspace.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 52ccc20c652b ("apparmor: use zstd compression for profile data")
Signed-off-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
John Johansen 2022-09-25 15:36:45 -07:00
parent 73c7e91c8b
commit 14d37a7f14
1 changed files with 5 additions and 1 deletions
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6
security/apparmor/apparmorfs.c
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@ -1327,7 +1327,11 @@ static int decompress_zstd(char *src, size_t slen, char *dst, size_t dlen)
ret = -ENOMEM;
goto cleanup;
}
ctx = zstd_init_dctx(wksp, wksp_len);
if (ctx == NULL) {
ret = -ENOMEM;
goto cleanup;
}
out_len = zstd_decompress_dctx(ctx, dst, dlen, src, slen);
if (zstd_is_error(out_len)) {
ret = -EINVAL;