On 9/21/20 2:51 PM, kernel test robot wrote:
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: e2aad6f1d232b457ea6a3194992dd4c0a83534a5 ("mm/debug_vm_pgtable/locks: take
correct page table lock")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: trinity
version: trinity-i386
with following parameters:
runtime: 300s
test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/
on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire
log/backtrace):
+----------------------------------------------------------------------+------------+------------+
| |
c50eb1ed65 | e2aad6f1d2 |
+----------------------------------------------------------------------+------------+------------+
| boot_successes | 0
| 0 |
| boot_failures | 61
| 17 |
| BUG:workqueue_lockup-pool | 1
| |
| BUG:sleeping_function_called_from_invalid_context_at_mm/page_alloc.c | 60
| 17 |
| BUG:unable_to_handle_page_fault_for_address | 0
| 17 |
| Oops:#[##] | 0
| 17 |
| EIP:ptep_get | 0
| 17 |
| Kernel_panic-not_syncing:Fatal_exception | 0
| 17 |
+----------------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.c...@intel.com>
[ 28.726464] BUG: sleeping function called from invalid context at
mm/page_alloc.c:4822
[ 28.727835] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1, name:
swapper
[ 28.729221] no locks held by swapper/1.
[ 28.729954] CPU: 0 PID: 1 Comm: swapper Not tainted
5.9.0-rc3-00324-ge2aad6f1d232b4 #1
[ 28.731484] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.12.0-1 04/01/2014
[ 28.732891] Call Trace:
[ 28.733295] ? show_stack+0x48/0x50
[ 28.733943] dump_stack+0x1b/0x1d
[ 28.734569] ___might_sleep+0x205/0x219
[ 28.735292] __might_sleep+0x106/0x10f
[ 28.736022] __alloc_pages_nodemask+0xe0/0x2c8
[ 28.736845] swap_migration_tests+0x62/0x295
[ 28.737639] debug_vm_pgtable+0x587/0x9b5
[ 28.738374] ? pte_advanced_tests+0x267/0x267
[ 28.739318] do_one_initcall+0x129/0x31c
[ 28.740023] ? rcu_read_lock_sched_held+0x46/0x74
[ 28.740944] kernel_init_freeable+0x201/0x250
[ 28.741763] ? rest_init+0xf8/0xf8
[ 28.742401] kernel_init+0xe/0x15d
[ 28.743040] ? rest_init+0xf8/0xf8
[ 28.743694] ret_from_fork+0x1c/0x30
This should be fixed by
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/mm/debug_vm_pgtable.c?id=3a4f9a45eadb6ed5fc04686e8db4dc7bb1caec44
[ 28.744364] BUG: unable to handle page fault for address: fffbbea4
[ 28.745465] #PF: supervisor read access in kernel mode
[ 28.746373] #PF: error_code(0x0000) - not-present page
[ 28.747275] *pde = 0492b067 *pte = 00000000
[ 28.748054] Oops: 0000 [#1]
[ 28.748548] CPU: 0 PID: 1 Comm: swapper Tainted: G W
5.9.0-rc3-00324-ge2aad6f1d232b4 #1
[ 28.750188] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.12.0-1 04/01/2014
[ 28.751641] EIP: ptep_get+0x0/0x3
[ 28.752226] Code: 5d fc c9 c3 55 c1 e8 1a 89 e5 53 31 db 83 f8 1f 6a 00 0f 94 c3
b8 80 67 02 c4 31 c9 89 da e8 16 5c f1 ff 89 d8 8b 5d fc c9 c3 <8b> 00 c3 55 31
c9 89 e5 57 56 53 8b 70 04 89 c3 b8 10 68 02 c4 6a
[ 28.755465] EAX: fffbbea4 EBX: fffbbea4 ECX: 000047bd EDX: fffbbea4
[ 28.756418] ESI: 000047bd EDI: 00000025 EBP: f406bed8 ESP: f406bebc
[ 28.757522] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010286
[ 28.758739] CR0: 80050033 CR2: fffbbea4 CR3: 04928000 CR4: 000406d0
[ 28.759828] Call Trace:
[ 28.760235] ? hugetlb_advanced_tests+0x2a/0x27f
[ 28.761099] ? do_raw_spin_unlock+0xd7/0x112
[ 28.761872] debug_vm_pgtable+0x927/0x9b5
[ 28.762578] ? pte_advanced_tests+0x267/0x267
[ 28.763462] do_one_initcall+0x129/0x31c
[ 28.764134] ? rcu_read_lock_sched_held+0x46/0x74
[ 28.764948] kernel_init_freeable+0x201/0x250
[ 28.765654] ? rest_init+0xf8/0xf8
[ 28.766277] kernel_init+0xe/0x15d
[ 28.766878] ? rest_init+0xf8/0xf8
[ 28.767488] ret_from_fork+0x1c/0x30
[ 28.768052] Modules linked in:
[ 28.768532] CR2: 00000000fffbbea4
[ 28.769065] ---[ end trace 9c4395cf49c7b3e7 ]---
IIUC, Anshuman is reworking the test to follow the page table update rules.
To reproduce:
# build kernel
cd linux
cp config-5.9.0-rc3-00324-ge2aad6f1d232b4 .config
make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 olddefconfig prepare
modules_prepare bzImage
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this
email
Thanks,
Rong Chen
-aneesh
