6.6-stable review patch. If anyone has any objections, please let me know.
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From: Arnd Bergmann arnd@arndb.de
[ Upstream commit 4ee7ffeb4ce50c80bc4504db6f39b25a2df6bcf4 ]
An earlier patch had tried to address a warning about a string copy with missing zero termination:
drivers/nvme/target/trace.h:52:3: warning: ‘strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
The new version causes a different warning with some compiler versions, notably gcc-9 and gcc-10, and also misses the zero padding that was apparently done intentionally in the original code:
drivers/nvme/target/trace.h:56:2: error: 'strncpy' specified bound depends on the length of the source argument [-Werror=stringop-overflow=]
Change it to use strscpy_pad() with the original length, which will give a properly padded and zero-terminated string as well as avoiding the warning.
Fixes: d86481e924a7 ("nvmet: use min of device_path and disk len") Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Keith Busch kbusch@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/nvme/target/trace.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/nvme/target/trace.h b/drivers/nvme/target/trace.h index 6109b3806b12..155334ddc13f 100644 --- a/drivers/nvme/target/trace.h +++ b/drivers/nvme/target/trace.h @@ -53,8 +53,7 @@ static inline void __assign_req_name(char *name, struct nvmet_req *req) return; }
- strncpy(name, req->ns->device_path, - min_t(size_t, DISK_NAME_LEN, strlen(req->ns->device_path))); + strscpy_pad(name, req->ns->device_path, DISK_NAME_LEN); } #endif