This is a note to let you know that I've just added the patch titled
ipmi_si: fix a memleak in try_smi_init()
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ipmi_si-fix-a-memleak-in-try_smi_init.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6cf1a126de2992b4efe1c3c4d398f8de4aed6e3f Mon Sep 17 00:00:00 2001
From: Yi Yang <yiyang13@xxxxxxxxxx>
Date: Thu, 29 Jun 2023 20:33:28 +0800
Subject: ipmi_si: fix a memleak in try_smi_init()
From: Yi Yang <yiyang13@xxxxxxxxxx>
commit 6cf1a126de2992b4efe1c3c4d398f8de4aed6e3f upstream.
Kmemleak reported the following leak info in try_smi_init():
unreferenced object 0xffff00018ecf9400 (size 1024):
comm "modprobe", pid 2707763, jiffies 4300851415 (age 773.308s)
backtrace:
[<000000004ca5b312>] __kmalloc+0x4b8/0x7b0
[<00000000953b1072>] try_smi_init+0x148/0x5dc [ipmi_si]
[<000000006460d325>] 0xffff800081b10148
[<0000000039206ea5>] do_one_initcall+0x64/0x2a4
[<00000000601399ce>] do_init_module+0x50/0x300
[<000000003c12ba3c>] load_module+0x7a8/0x9e0
[<00000000c246fffe>] __se_sys_init_module+0x104/0x180
[<00000000eea99093>] __arm64_sys_init_module+0x24/0x30
[<0000000021b1ef87>] el0_svc_common.constprop.0+0x94/0x250
[<0000000070f4f8b7>] do_el0_svc+0x48/0xe0
[<000000005a05337f>] el0_svc+0x24/0x3c
[<000000005eb248d6>] el0_sync_handler+0x160/0x164
[<0000000030a59039>] el0_sync+0x160/0x180
The problem was that when an error occurred before handlers registration
and after allocating `new_smi->si_sm`, the variable wouldn't be freed in
the error handling afterwards since `shutdown_smi()` hadn't been
registered yet. Fix it by adding a `kfree()` in the error handling path
in `try_smi_init()`.
Cc: stable@xxxxxxxxxxxxxxx # 4.19+
Fixes: 7960f18a5647 ("ipmi_si: Convert over to a shutdown handler")
Signed-off-by: Yi Yang <yiyang13@xxxxxxxxxx>
Co-developed-by: GONG, Ruiqi <gongruiqi@xxxxxxxxxxxxxxx>
Signed-off-by: GONG, Ruiqi <gongruiqi@xxxxxxxxxxxxxxx>
Message-Id: <20230629123328.2402075-1-gongruiqi@xxxxxxxxxxxxxxx>
Signed-off-by: Corey Minyard <minyard@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/char/ipmi/ipmi_si_intf.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -2082,6 +2082,11 @@ static int try_smi_init(struct smi_info
new_smi->io.io_cleanup = NULL;
}
+ if (rv && new_smi->si_sm) {
+ kfree(new_smi->si_sm);
+ new_smi->si_sm = NULL;
+ }
+
return rv;
}
Patches currently in stable-queue which might be from yiyang13@xxxxxxxxxx are
queue-6.1/serial-tegra-handle-clk-prepare-error-in-tegra_uart_.patch
queue-6.1/ipmi_si-fix-a-memleak-in-try_smi_init.patch
queue-6.1/mtd-rawnand-fsmc-handle-clk-prepare-error-in-fsmc_na.patch
