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liveupdate: reject LIVEUPDATE_IOCTL_CREATE_SESSION with invalid name length

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A session name must not be an empty string, and must not exceed the
maximum size define in the uapi header, including null termination.

Fixes: 0153094d03 ("liveupdate: luo_session: add sessions support")
Cc: stable@vger.kernel.org

Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Pratyush Yadav <pratyush@kernel.org>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Link: https://lore.kernel.org/r/20260429212221.814107-2-luca.boccassi@gmail.com
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
This commit is contained in:
Luca Boccassi 2026-04-29 22:21:14 +01:00 committed by Mike Rapoport (Microsoft)
parent 1ab207e9b0
commit e947433cd0
1 changed files with 4 additions and 0 deletions
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4
kernel/liveupdate/luo_session.c
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@ -382,9 +382,13 @@ static int luo_session_getfile(struct luo_session *session, struct file **filep)
int luo_session_create(const char *name, struct file **filep)
{
size_t len = strnlen(name, LIVEUPDATE_SESSION_NAME_LENGTH);
struct luo_session *session;
int err;
if (len == 0 || len > LIVEUPDATE_SESSION_NAME_LENGTH - 1)
return -EINVAL;
session = luo_session_alloc(name);
if (IS_ERR(session))
return PTR_ERR(session);