[linux-6.6.y 3/3] HID: core: Fix size_t specifier in hid_report_raw_event()

From
Lee Jones <lee@kernel.org>
Date
2026-06-03 13:32:03
Also in
bpf, linux-staging, lkml, stable
Reply to
Lee Jones, 2026-06-03
From: Nathan Chancellor <nathan@kernel.org>

[ Upstream commit 4d3a2a466b8d68d852a1f3bbf11204b718428dc4 ]

When building for 32-bit platforms, for which 'size_t' is
'unsigned int', there are warnings around using the incorrect format
specifier to print bsize in hid_report_raw_event():

  drivers/hid/hid-core.c:2054:29: error: format specifies type 'long' but the argument has type 'size_t' (aka 'unsigned int') [-Werror,-Wformat]
   2053 |                 hid_warn_ratelimited(hid, "Event data for report %d is incorrect (%d vs %ld)\n",
        |                                                                                         ~~~
        |                                                                                         %zu
   2054 |                                      report->id, csize, bsize);
        |                                                         ^~~~~
  drivers/hid/hid-core.c:2076:29: error: format specifies type 'long' but the argument has type 'size_t' (aka 'unsigned int') [-Werror,-Wformat]
   2075 |                 hid_warn_ratelimited(hid, "Event data for report %d was too short (%d vs %ld)\n",
        |                                                                                          ~~~
        |                                                                                          %zu
   2076 |                                      report->id, rsize, bsize);
        |                                                         ^~~~~

Use the proper 'size_t' format specifier, '%zu', to clear up the
warnings.

Cc: <redacted>
Fixes: 2c85c61d1332 ("HID: pass the buffer size to hid_report_raw_event")
Reported-by: Miguel Ojeda <ojeda@kernel.org>
Closes: https://lore.kernel.org/20260516020430.110135-1-ojeda@kernel.org/ (local)
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 3ab135238832446399614e7a4bb796d620717806)
Signed-off-by: Lee Jones <lee@kernel.org>
(cherry picked from commit 76606eed6cb62ec97afcc270948ef8335d02e944)
Signed-off-by: Lee Jones <lee@kernel.org>
---
 drivers/hid/hid-core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index c6d98634b97e..2de4d831c526 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -2003,7 +2003,7 @@ int hid_report_raw_event(struct hid_device *hid, enum hid_report_type type, u8 *
 		return 0;
 
 	if (unlikely(bsize < csize)) {
-		hid_warn_ratelimited(hid, "Event data for report %d is incorrect (%d vs %ld)\n",
+		hid_warn_ratelimited(hid, "Event data for report %d is incorrect (%d vs %zu)\n",
 				     report->id, csize, bsize);
 		return -EINVAL;
 	}
@@ -2025,7 +2025,7 @@ int hid_report_raw_event(struct hid_device *hid, enum hid_report_type type, u8 *
 		rsize = max_buffer_size;
 
 	if (bsize < rsize) {
-		hid_warn_ratelimited(hid, "Event data for report %d was too short (%d vs %ld)\n",
+		hid_warn_ratelimited(hid, "Event data for report %d was too short (%d vs %zu)\n",
 				     report->id, rsize, bsize);
 		return -EINVAL;
 	}
-- 
2.54.0.1032.g2f8565e1d1-goog
Thread (5 messages) 5 messages, 3 authors, last reply 2026-06-05
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