[PATCH 1/2] nvmet: re-fix tracing strncpy() warning
Arnd Bergmann
arnd at kernel.org
Wed Jan 3 07:56:55 PST 2024
From: Arnd Bergmann <arnd at arndb.de>
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 at arndb.de>
---
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
--
2.39.2
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