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qla2x00t: Fix an out of bounds access

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Avoid that KASAN reports the following:

BUG: KASAN: stack-out-of-bounds in q2t_async_event+0x27c/0x3a0 [qla2x00tgt]
Read of size 2 at addr ffff8880db407db0 by task swapper/0/0

CPU: 0 PID: 0 Comm: swapper/0 Tainted: G           O      4.19.19-dbg+ #1
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
Call Trace:
 <IRQ>
 dump_stack+0xa4/0xfa
 print_address_description+0x71/0x239
 kasan_report.cold.6+0x242/0x301
 __asan_load2+0x51/0x80
 q2t_async_event+0x27c/0x3a0 [qla2x00tgt]
 qla2x00_async_event+0x34f/0x2390 [qla2xxx_scst]
 qla24xx_msix_default+0x2b8/0x300 [qla2xxx_scst]
 __handle_irq_event_percpu+0x77/0x3c0
 handle_irq_event_percpu+0x68/0xe0
 handle_irq_event+0x5a/0x8b
 handle_edge_irq+0x114/0x2f0
 handle_irq+0x18d/0x205
 do_IRQ+0x73/0x150
 common_interrupt+0xf/0xf



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7917 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2019-02-11 00:11:01 +00:00
parent 42e88fc0ba
commit 1f2e6e0113
1 changed files with 3 additions and 3 deletions
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6
qla2x00t/qla2x00-target/qla2x00t.c
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@@ -5752,10 +5752,10 @@ static void q2t_async_event(uint16_t code, scsi_qla_host_t *vha,
default:
TRACE(TRACE_MGMT, "qla2x00t(%ld): Async event %#x occurred: "
"ignoring (m[1]=%x, m[2]=%x, m[3]=%x, m[4]=%x)",
"ignoring (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
vha->host_no, code,
le16_to_cpu(mailbox[1]), le16_to_cpu(mailbox[2]),
le16_to_cpu(mailbox[3]), le16_to_cpu(mailbox[4]));
le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
break;
}