[Scst-svn] [master] qla2x00t-32gbit: Fix memory leak in qla2x00_probe_one()

[Gleb C. <lna...@ya...>]

Commit: 6ff72c8
GitHub URL: https://github.com/SCST-project/scst/commit/6ff72c8153ef230fa36329deeb71a024300d14ef
Author: Gleb Chesnokov
Date: 2023-04-12T11:08:39+03:00
Log Message:
-----------
qla2x00t-32gbit: Fix memory leak in qla2x00_probe_one()

There is a memory leak reported by kmemleak:

  unreferenced object 0xffffc900003f0000 (size 12288):
    comm "modprobe", pid 19117, jiffies 4299751452 (age 42490.264s)
    hex dump (first 32 bytes):
      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    backtrace:
      [<00000000629261a8>] __vmalloc_node_range+0xe56/0x1110
      [<0000000001906886>] __vmalloc_node+0xbd/0x150
      [<000000005bb4dc34>] vmalloc+0x25/0x30
      [<00000000a2dc1194>] qla2x00_create_host+0x7a0/0xe30 [qla2xxx]
      [<0000000062b14b47>] qla2x00_probe_one+0x2eb8/0xd160 [qla2xxx]
      [<00000000641ccc04>] local_pci_probe+0xeb/0x1a0

The root cause is traced to an error-handling path in qla2x00_probe_one()
when the adapter "base_vha" initialize failed. The fab_scan_rp "scan.l" is
used to record the port information and it is allocated in
qla2x00_create_host(). However, it is not released in the error handling
path "probe_failed".

Fix this by freeing the memory of "scan.l" when an error occurs in the
adapter initialization process.

Fixes: a4239945b8ad ("scsi: qla2xxx: Add switch command to simplify fabric discovery")
Signed-off-by: Li Zetao <liz...@hu...>
Link: https://lore.kernel.org/r/202...@hu...
Reviewed-by: Himanshu Madhani <him...@or...>
Signed-off-by: Martin K. Petersen <mar...@or...>
[ commit 85ade4010e13 upstream ]

Modified Paths:
--------------
 qla2x00t-32gbit/qla_os.c | 1 +
 1 file changed, 1 insertion(+)

===================================================================
diff --git a/qla2x00t-32gbit/qla_os.c b/qla2x00t-32gbit/qla_os.c
index 923dbf7..268e0cd 100644
--- a/qla2x00t-32gbit/qla_os.c
+++ b/qla2x00t-32gbit/qla_os.c
@@ -3671,6 +3671,7 @@ skip_dpc:
 probe_failed:
 	qla_enode_stop(base_vha);
 	qla_edb_stop(base_vha);
+	vfree(base_vha->scan.l);
 	if (base_vha->gnl.l) {
 		dma_free_coherent(&ha->pdev->dev, base_vha->gnl.size,
 				base_vha->gnl.l, base_vha->gnl.ldma);