linux-kernel - Re: [PATCH v2 RESEND 2/2] s390/kexec: fix memory leak of ipl report buffer

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Date:   Tue, 16 Nov 2021 12:17:35 +0100
From:   Heiko Carstens <hca@...ux.ibm.com>
To:     Baoquan He <bhe@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
        kexec@...ts.infradead.org, prudo@...hat.com
Subject: Re: [PATCH v2 RESEND 2/2] s390/kexec: fix memory leak of ipl report
 buffer

On Tue, Nov 16, 2021 at 11:31:01AM +0800, Baoquan He wrote:
> unreferenced object 0x38000195000 (size 4096):
>   comm "kexec", pid 8548, jiffies 4294953647 (age 32443.270s)
>   hex dump (first 32 bytes):
>     00 00 00 c8 20 00 00 00 00 00 00 c0 02 80 00 00  .... ...........
>     40 40 40 40 40 40 40 40 00 00 00 00 00 00 00 00  @@@@@@@@........
>   backtrace:
>     [<0000000011a2f199>] __vmalloc_node_range+0xc0/0x140
>     [<0000000081fa2752>] vzalloc+0x5a/0x70
>     [<0000000063a4c92d>] ipl_report_finish+0x2c/0x180
>     [<00000000553304da>] kexec_file_add_ipl_report+0xf4/0x150
>     [<00000000862d033f>] kexec_file_add_components+0x124/0x160
>     [<000000000d2717bb>] arch_kexec_kernel_image_load+0x62/0x90
>     [<000000002e0373b6>] kimage_file_alloc_init+0x1aa/0x2e0
>     [<0000000060f2d14f>] __do_sys_kexec_file_load+0x17c/0x2c0
>     [<000000008c86fe5a>] __s390x_sys_kexec_file_load+0x40/0x50
>     [<000000001fdb9dac>] __do_syscall+0x1bc/0x1f0
>     [<000000003ee4258d>] system_call+0x78/0xa0
> 
> Signed-off-by: Baoquan He <bhe@...hat.com>
> Fixes: 99feaa717e55 ("s390/kexec_file: Create ipl report and pass to next kernel")
> ---
> RESEND:
>   Fix the incorrect subject.
> 
>  arch/s390/include/asm/kexec.h         | 7 +++++++
>  arch/s390/kernel/machine_kexec_file.c | 9 +++++++++
>  2 files changed, 16 insertions(+)

Applied, thanks!