From: Andreas Schwab <schwab@linux-m68k.org>
To: Tong Tiangen <tongtiangen@huawei.com>
Cc: <palmerdabbelt@google.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
<linux-riscv@lists.infradead.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH -next v2] riscv: add VMAP_STACK overflow detection
Date: Thu, 15 Jul 2021 18:22:19 +0200 [thread overview]
Message-ID: <87pmvjtumc.fsf@igel.home> (raw)
In-Reply-To: <20210621032855.130650-1-tongtiangen@huawei.com> (Tong Tiangen's message of "Mon, 21 Jun 2021 11:28:55 +0800")
On Jun 21 2021, Tong Tiangen wrote:
> This patch adds stack overflow detection to riscv, usable when
> CONFIG_VMAP_STACK=y.
This breaks get_wchan:
[ 65.609696] Unable to handle kernel paging request at virtual address ffffffd0003bbde8
[ 65.610460] Oops [#1]
[ 65.610626] Modules linked in: virtio_blk virtio_mmio rtc_goldfish btrfs blake2b_generic libcrc32c xor raid6_pq sg dm_multipath dm_mod scsi_dh_rdac scsi_dh_emc scsi_dh_alua efivarfs
[ 65.611670] CPU: 2 PID: 1 Comm: systemd Not tainted 5.14.0-rc1-1.g34fe32a-default #1 openSUSE Tumbleweed (unreleased) c62f7109153e5a0897ee58ba52393ad99b070fd2
[ 65.612334] Hardware name: riscv-virtio,qemu (DT)
[ 65.613008] epc : get_wchan+0x5c/0x88
[ 65.613334] ra : get_wchan+0x42/0x88
[ 65.613625] epc : ffffffff800048a4 ra : ffffffff8000488a sp : ffffffd00021bb90
[ 65.614008] gp : ffffffff817709f8 tp : ffffffe07fe91b80 t0 : 00000000000001f8
[ 65.614411] t1 : 0000000000020000 t2 : 0000000000000000 s0 : ffffffd00021bbd0
[ 65.614818] s1 : ffffffd0003bbdf0 a0 : 0000000000000001 a1 : 0000000000000002
[ 65.615237] a2 : ffffffff81618008 a3 : 0000000000000000 a4 : 0000000000000000
[ 65.615637] a5 : ffffffd0003bc000 a6 : 0000000000000002 a7 : ffffffe27d370000
[ 65.616022] s2 : ffffffd0003bbd90 s3 : ffffffff8071a81e s4 : 0000000000003fff
[ 65.616407] s5 : ffffffffffffc000 s6 : 0000000000000000 s7 : ffffffff81618008
[ 65.616845] s8 : 0000000000000001 s9 : 0000000180000040 s10: 0000000000000000
[ 65.617248] s11: 000000000000016b t3 : 000000ff00000000 t4 : 0c6aec92de5e3fd7
[ 65.617672] t5 : fff78f60608fcfff t6 : 0000000000000078
[ 65.618088] status: 0000000000000120 badaddr: ffffffd0003bbde8 cause: 000000000000000d
[ 65.618621] [<ffffffff800048a4>] get_wchan+0x5c/0x88
[ 65.619008] [<ffffffff8022da88>] do_task_stat+0x7a2/0xa46
[ 65.619325] [<ffffffff8022e87e>] proc_tgid_stat+0xe/0x16
[ 65.619637] [<ffffffff80227dd6>] proc_single_show+0x46/0x96
[ 65.619979] [<ffffffff801ccb1e>] seq_read_iter+0x190/0x31e
[ 65.620341] [<ffffffff801ccd70>] seq_read+0xc4/0x104
[ 65.620633] [<ffffffff801a6bfe>] vfs_read+0x6a/0x112
[ 65.620922] [<ffffffff801a701c>] ksys_read+0x54/0xbe
[ 65.621206] [<ffffffff801a7094>] sys_read+0xe/0x16
[ 65.621474] [<ffffffff8000303e>] ret_from_syscall+0x0/0x2
[ 65.622169] ---[ end trace f24856ed2b8789c5 ]---
[ 65.622832] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
next prev parent reply other threads:[~2021-07-15 16:22 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-21 3:28 [PATCH -next v2] riscv: add VMAP_STACK overflow detection Tong Tiangen
2021-07-06 20:24 ` Palmer Dabbelt
2021-07-15 16:22 ` Andreas Schwab [this message]
2021-07-16 12:53 ` Jisheng Zhang
2021-07-16 15:53 ` Andreas Schwab
2021-07-17 2:18 ` Jisheng Zhang
2021-07-17 6:55 ` Andreas Schwab
2021-07-19 3:27 ` tongtiangen
2021-07-19 7:23 ` Andreas Schwab
2021-07-22 6:12 ` Palmer Dabbelt
2021-07-22 8:35 ` Atish Patra
2021-07-22 13:37 ` Jisheng Zhang
2021-07-22 14:24 ` Jisheng Zhang
2021-07-22 15:42 ` Andreas Schwab
2021-07-22 23:54 ` Jisheng Zhang
2021-07-23 1:36 ` tongtiangen
2021-07-23 4:29 ` Jisheng Zhang
2021-07-23 4:40 ` Jisheng Zhang
2021-07-22 9:02 ` Andreas Schwab
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