5.15-stable review patch. If anyone has any objections, please let me know.
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From: Shyam Prasad N sprasad@microsoft.com
[ Upstream commit e4645cc2f1e2d6f268bb8dcfac40997c52432aed ]
We've seen the in-flight count go into negative with some internal stress testing in Microsoft.
Adding a WARN when this happens, in hope of understanding why this happens when it happens.
Signed-off-by: Shyam Prasad N sprasad@microsoft.com Reviewed-by: Bharath SM bharathsm@microsoft.com Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/cifs/smb2ops.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index a8f33e8261344..b725bd3144fb7 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -85,6 +85,7 @@ smb2_add_credits(struct TCP_Server_Info *server, *val = 65000; /* Don't get near 64K credits, avoid srv bugs */ pr_warn_once("server overflowed SMB3 credits\n"); } + WARN_ON_ONCE(server->in_flight == 0); server->in_flight--; if (server->in_flight == 0 && ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&