The patch titled
Subject: afs: read of large file returns EBADMSG
has been added to the -mm tree. Its filename is
afs-read-of-file-returns-ebadmsg.patch
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From: Anton Blanchard <[email protected]>
Subject: afs: read of large file returns EBADMSG
A read of a large file on an afs mount failed:
# cat junk.file > /dev/null
cat: junk.file: Bad message
Looking at the trace, call->offset wrapped since it is only an
unsigned short. In afs_extract_data:
_enter("{%u},{%zu},%d,,%zu", call->offset, len, last, count);
...
if (call->offset < count) {
if (last) {
_leave(" = -EBADMSG [%d < %zu]", call->offset, count);
return -EBADMSG;
}
Which matches the trace:
[cat ] ==> afs_extract_data({65132},{524},1,,65536)
[cat ] <== afs_extract_data() = -EBADMSG [0 < 65536]
call->offset went from 65132 to 0. Fix this by making call->offset an
unsigned int.
Signed-off-by: Anton Blanchard <[email protected]>
Cc: David Howells <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
fs/afs/internal.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/afs/internal.h~afs-read-of-file-returns-ebadmsg fs/afs/internal.h
--- a/fs/afs/internal.h~afs-read-of-file-returns-ebadmsg
+++ a/fs/afs/internal.h
@@ -109,7 +109,7 @@ struct afs_call {
unsigned reply_size; /* current size of reply */
unsigned first_offset; /* offset into mapping[first] */
unsigned last_to; /* amount of mapping[last] */
- unsigned short offset; /* offset into received data
store */
+ unsigned offset; /* offset into received data
store */
unsigned char unmarshall; /* unmarshalling phase */
bool incoming; /* T if incoming call */
bool send_pages; /* T if data from mapping
should be sent */
_
Subject: Subject: afs: read of large file returns EBADMSG
Patches currently in -mm which might be from [email protected] are
linux-next.patch
afs-read-of-file-returns-ebadmsg.patch
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