| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Wed, 7 Apr 2021 09:27:46 +0800
From: songqiang <songqiang@...ontech.com>
To: christian.koenig@....com, ray.huang@....com, airlied@...ux.ie,
daniel@...ll.ch
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
songqiang <songqiang@...ontech.com>
Subject: [PATCH] drivers/gpu/drm/ttm/ttm_page_allo.c: adjust ttm pages refcount fix the bug: Feb 6 17:13:13 aaa-PC kernel: [ 466.271034] BUG: Bad page state in process blur_image pfn:7aee2 Feb 6 17:13:13 aaa-PC kernel: [ 466.271037] page:980000025fca4170 count:0 mapcount:0 mapping:980000025a0dca60 index:0x0 Feb 6 17:13:13 aaa-PC kernel: [ 466.271039] flags: 0x1e01fff000000() Feb 6 17:13:13 aaa-PC kernel: [ 466.271042] raw: 0001e01fff000000 0000000000000100 0000000000000200 980000025a0dca60 Feb 6 17:13:13 aaa-PC kernel: [ 466.271044] raw: 0000000000000000 0000000000000000 00000000ffffffff Feb 6 17:13:13 aaa-PC kernel: [ 466.271046] page dumped because: non-NULL mapping Feb 6 17:13:13 aaa-PC kernel: [ 466.271047] Modules linked in: bnep fuse bluetooth ecdh_generic sha256_generic cfg80211 rfkill vfat fat serio_raw uio_pdrv_genirq binfmt_misc ip_tables amdgpu chash radeon r8168 loongson gpu_sched Feb 6 17:13:13 aaa-PC kernel: [ 466.271059] CPU: 3 PID: 9554 Comm:
blur_image Tainted: G B 4.19.0-loongson-3-desktop #3036 Feb 6 17:13:13 aaa-PC kernel: [ 466.271061] Hardware name: Haier Kunlun-LS3A4000-LS7A-desktop/Kunlun-LS3A4000-LS7A-desktop, BIOS Kunlun-V4.0.12V4.0 LS3A4000 03/19/2020 Feb 6 17:13:13 aaa-PC kernel: [ 466.271063] Stack : 000000000000007b 000000007400cce0 0000000000000000 0000000000000007 Feb 6 17:13:13 aaa-PC kernel: [ 466.271067] 0000000000000000 0000000000000000 0000000000002a82 ffffffff8202c910 Feb 6 17:13:13 aaa-PC kernel: [ 466.271070] 0000000000000000 0000000000002a82 0000000000000000 ffffffff81e20000 Feb 6 17:13:13 aaa-PC kernel: [ 466.271074] 0000000000000000 ffffffff8021301c ffffffff82040000 6e754b20534f4942 Feb 6 17:13:13 aaa-PC kernel: [ 466.271078] ffff000000000000 0000000000000000 000000007400cce0 0000000000000000 Feb 6 17:13:13 aaa-PC kernel: [ 466.271082] 9800000007155d40 ffffffff81cc5470 0000000000000005 6db6db6db6db0000 Feb 6 17:13:13
aaa-PC kernel: [ 466.271086] 0000000000000003 fffffffffffffffb 0000000000006000 98000002559f4000 Feb 6 17:13:13 aaa-PC kernel: [ 466.271090] 980000024a448000 980000024a44b7f0 9800000007155d50 ffffffff819f5158 Feb 6 17:13:13 aaa-PC kernel: [ 466.271094] 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Feb 6 17:13:13 aaa-PC kernel: [ 466.271097] 9800000007155d40 ffffffff802310c4 ffffffff81e70000 ffffffff819f5158 Feb 6 17:13:13 aaa-PC kernel: [ 466.271101] ... Feb 6 17:13:13 aaa-PC kernel: [ 466.271103] Call Trace: Feb 6 17:13:13 aaa-PC kernel: [ 466.271107] [<ffffffff802310c4>] show_stack+0x44/0x1c0 Feb 6 17:13:13 aaa-PC kernel: [ 466.271110] [<ffffffff819f5158>] dump_stack+0x1d8/0x240 Feb 6 17:13:13 aaa-PC kernel: [ 466.271113] [<ffffffff80491c10>] bad_page+0x210/0x2c0 Feb 6 17:13:13 aaa-PC kernel: [ 466.271116] [<ffffffff804931c8>] free_pcppages_bulk+0x708/0x900 Feb 6 17:13:13 aaa-PC kernel: [ 46
6.271119] [<ffffffff804980cc>] free_unref_page_list+0x1cc/0x2c0 Feb 6 17:13:13 aaa-PC kernel: [ 466.271122] [<ffffffff804ad2c8>] release_pages+0x648/0x900 Feb 6 17:13:13 aaa-PC kernel: [ 466.271125] [<ffffffff804f3b48>] tlb_flush_mmu_free+0x88/0x100 Feb 6 17:13:13 aaa-PC kernel: [ 466.271128] [<ffffffff804f8a24>] zap_pte_range+0xa24/0x1480 Feb 6 17:13:13 aaa-PC kernel: [ 466.271132] [<ffffffff804f98b0>] unmap_page_range+0x1f0/0x500 Feb 6 17:13:13 aaa-PC kernel: [ 466.271135] [<ffffffff804fa054>] unmap_vmas+0x154/0x200 Feb 6 17:13:13 aaa-PC kernel: [ 466.271138] [<ffffffff8051190c>] exit_mmap+0x20c/0x380 Feb 6 17:13:13 aaa-PC kernel: [ 466.271142] [<ffffffff802bb9c8>] mmput+0x148/0x300 Feb 6 17:13:13 aaa-PC kernel: [ 466.271145] [<ffffffff802c80d8>] do_exit+0x6d8/0x1900 Feb 6 17:13:13 aaa-PC kernel: [ 466.271148] [<ffffffff802cb288>] do_group_exit+0x88/0x1c0 Feb 6 17:13:13 aaa-PC kernel: [ 466.271151] [<ffffffff802cb3d8>] sys_exit_group+0x18/0x40 Feb 6 17
:13:13 aaa-PC kernel: [ 466.271155] [<ffffffff8023f954>] syscall_common+0x34/0xa4
Signed-off-by: songqiang <songqiang@...ontech.com>
---
drivers/gpu/drm/ttm/ttm_page_alloc.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index 14660f723f71..f3698f0ad4d7 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -736,8 +736,16 @@ static void ttm_put_pages(struct page **pages, unsigned npages, int flags,
if (++p != pages[i + j])
break;
- if (j == HPAGE_PMD_NR)
+ if (j == HPAGE_PMD_NR) {
order = HPAGE_PMD_ORDER;
+ for (j = 1; j < HPAGE_PMD_NR; ++j)
+ page_ref_dec(pages[i+j]);
+ }
}
#endif
@@ -868,10 +876,12 @@ static int ttm_get_pages(struct page **pages, unsigned npages, int flags,
p = alloc_pages(huge_flags, HPAGE_PMD_ORDER);
if (!p)
break;
-
- for (j = 0; j < HPAGE_PMD_NR; ++j)
+ for (j = 0; j < HPAGE_PMD_NR; ++j) {
pages[i++] = p++;
-
+ if (j > 0)
+ page_ref_inc(pages[i-1]);
+ }
npages -= HPAGE_PMD_NR;
}
}
Powered by blists - more mailing lists