diff mbox series

[net,1/9] rxrpc: Fix missing unlock in rxrpc_do_sendmsg()

Message ID 167112118790.152641.2918682447555593225.stgit@warthog.procyon.org.uk (mailing list archive)
State Accepted
Commit 4feb2c44629e6f9b459b41a5a60491069d346a95
Delegated to: Netdev Maintainers
Headers show
Series rxrpc: Fixes for I/O thread conversion/SACK table expansion | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net
netdev/fixes_present success Fixes tag present in non-next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1 this patch: 1
netdev/cc_maintainers warning 4 maintainers not CCed: edumazet@google.com davem@davemloft.net pabeni@redhat.com kuba@kernel.org
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 1 this patch: 1
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 8 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

David Howells Dec. 15, 2022, 4:19 p.m. UTC
One of the error paths in rxrpc_do_sendmsg() doesn't unlock the call mutex
before returning.  Fix it to do this.

Note that this still doesn't get rid of the checker warning:

   ../net/rxrpc/sendmsg.c:617:5: warning: context imbalance in 'rxrpc_do_sendmsg' - wrong count at exit

I think the interplay between the socket lock and the call's user_mutex may
be too complicated for checker to analyse, especially as
rxrpc_new_client_call_for_sendmsg(), which it calls, returns with the
call's user_mutex if successful but unconditionally drops the socket lock.

Fixes: e754eba685aa ("rxrpc: Provide a cmsg to specify the amount of Tx data for a call")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
---

 net/rxrpc/sendmsg.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c
index 9fa7e37f7155..cde1e65f16b4 100644
--- a/net/rxrpc/sendmsg.c
+++ b/net/rxrpc/sendmsg.c
@@ -625,7 +625,7 @@  int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
 			if (call->tx_total_len != -1 ||
 			    call->tx_pending ||
 			    call->tx_top != 0)
-				goto error_put;
+				goto out_put_unlock;
 			call->tx_total_len = p.call.tx_total_len;
 		}
 	}