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Date: Mon, 12 Dec 2022 00:30:24 +0800
From: kernel test robot <yujie.liu@...el.com>
To: Bartosz Golaszewski <brgl@...ev.pl>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>,
<linux-i2c@...r.kernel.org>, Wolfram Sang <wsa@...nel.org>,
<linux-kernel@...r.kernel.org>,
"Bartosz Golaszewski" <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH 2/2] i2c: dev: don't allow user-space to deadlock the
kernel
Greeting,
FYI, we noticed WARNING:at_drivers/base/core.c:#device_release due to commit (built with gcc-11):
commit: 22f82cbe7636f59cc21f6837c500d704e3b412a5 ("[PATCH 2/2] i2c: dev: don't allow user-space to deadlock the kernel")
url: https://github.com/intel-lab-lkp/linux/commits/Bartosz-Golaszewski/i2c-fortify-the-subsystem-against-user-space-induced-deadlocks/20221209-022450
base: https://git.kernel.org/cgit/linux/kernel/git/wsa/linux.git i2c/for-next
patch link: https://lore.kernel.org/all/20221208182142.250084-3-brgl@bgdev.pl/
patch subject: [PATCH 2/2] i2c: dev: don't allow user-space to deadlock the kernel
in testcase: xfstests
version: xfstests-x86_64-5a5e419-1_20221128
with following parameters:
disk: 4HDD
fs: xfs
test: xfs-group-07
test-description: xfstests is a regression test suite for xfs and other files ystems.
test-url: git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git
on test machine: 4 threads 1 sockets Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz (Ivy Bridge) with 8G memory
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
kern :warn : [ 35.378637] ------------[ cut here ]------------
kern :err : [ 35.388198] Device 'i2c-7' does not have a release() function, it is broken and must be fixed. See Documentation/core-api/kobject.rst.
kern :warn : [ 35.401052] WARNING: CPU: 1 PID: 195 at drivers/base/core.c:2332 device_release (drivers/base/core.c:2332)
kern :warn : [ 35.410178] Modules linked in: x86_pkg_temp_thermal intel_powerclamp i915(+) sd_mod t10_pi crc64_rocksoft_generic crc64_rocksoft ipmi_devintf crc64 coretemp ipmi_msghandler sg kvm_intel drm_buddy intel_gtt kvm irqbypass crct10dif_pclmul drm_display_helper crc32_pclmul ttm crc32c_intel ghash_clmulni_intel drm_kms_helper sha512_ssse3 syscopyarea ahci mei_me rapl intel_cstate libahci sysfillrect wmi_bmof sysimgblt i2c_i801 mei intel_uncore libata i2c_smbus lpc_ich fb_sys_fops video wmi drm fuse ip_tables
kern :warn : [ 35.455372] CPU: 1 PID: 195 Comm: systemd-udevd Not tainted 6.1.0-rc8-00063-g22f82cbe7636 #1
kern :warn : [ 35.464544] Hardware name: Hewlett-Packard HP Pro 3340 MT/17A1, BIOS 8.07 01/24/2013
kern :warn : [ 35.473036] RIP: 0010:device_release (drivers/base/core.c:2332)
kern :warn : [ 35.478405] Code: 48 8d 7d 50 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 89 00 00 00 48 8b 75 50 48 85 f6 74 13 48 c7 c7 60 f0 ce 83 e8 6c 1c f2 00 <0f> 0b e9 0f ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1
All code
========
0: 48 8d 7d 50 lea 0x50(%rbp),%rdi
4: 48 89 fa mov %rdi,%rdx
7: 48 c1 ea 03 shr $0x3,%rdx
b: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
f: 0f 85 89 00 00 00 jne 0x9e
15: 48 8b 75 50 mov 0x50(%rbp),%rsi
19: 48 85 f6 test %rsi,%rsi
1c: 74 13 je 0x31
1e: 48 c7 c7 60 f0 ce 83 mov $0xffffffff83cef060,%rdi
25: e8 6c 1c f2 00 callq 0xf21c96
2a:* 0f 0b ud2 <-- trapping instruction
2c: e9 0f ff ff ff jmpq 0xffffffffffffff40
31: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
38: fc ff df
3b: 48 89 ea mov %rbp,%rdx
3e: 48 rex.W
3f: c1 .byte 0xc1
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: e9 0f ff ff ff jmpq 0xffffffffffffff16
7: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
e: fc ff df
11: 48 89 ea mov %rbp,%rdx
14: 48 rex.W
15: c1 .byte 0xc1
kern :warn : [ 35.497913] RSP: 0018:ffffc900008af310 EFLAGS: 00010286
kern :warn : [ 35.503884] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
kern :debug : [ 35.507134] calling acpi_cpufreq_init+0x0/0xdeb [acpi_cpufreq] @ 190
kern :warn : [ 35.511739] RDX: 0000000000000004 RSI: 0000000000000008 RDI: fffff52000115e54
kern :debug : [ 35.518879] initcall acpi_cpufreq_init+0x0/0xdeb [acpi_cpufreq] returned -17 after 1 usecs
kern :warn : [ 35.526749] RBP: ffff88811b5671e8 R08: 0000000000000001 R09: ffffc900008af147
kern :warn : [ 35.526761] R10: fffff52000115e28 R11: 0000000000000001 R12: ffff888215592a00
kern :warn : [ 35.551527] R13: 0000000000000000 R14: ffff88811b5671e8 R15: ffff88811b567220
kern :warn : [ 35.559414] FS: 00007f9cb90ec8c0(0000) GS:ffff88818e880000(0000) knlGS:0000000000000000
kern :warn : [ 35.568257] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kern :warn : [ 35.574756] CR2: 0000556c7b996000 CR3: 000000011d29a003 CR4: 00000000001706e0
kern :warn : [ 35.582650] Call Trace:
kern :warn : [ 35.585828] <TASK>
kern :warn : [ 35.588667] kobject_cleanup (lib/kobject.c:677)
kern :warn : [ 35.593256] i2c_del_adapter (drivers/i2c/i2c-core-base.c:1710)
kern :warn : [ 35.597944] ? drm_encoder_cleanup (include/linux/list.h:134 include/linux/list.h:148 drivers/gpu/drm/drm_encoder.c:199) drm
kern :warn : [ 35.603630] ? __process_removed_driver (drivers/i2c/i2c-core-base.c:1655)
kern :warn : [ 35.609083] ? drm_encoder_cleanup (include/linux/list.h:134 include/linux/list.h:148 drivers/gpu/drm/drm_encoder.c:199) drm
kern :warn : [ 35.614859] intel_sdvo_init (drivers/gpu/drm/i915/display/intel_sdvo.c:2626 drivers/gpu/drm/i915/display/intel_sdvo.c:3436) i915
kern :warn : [ 35.620500] ? intel_sdvo_get_hw_state (drivers/gpu/drm/i915/display/intel_sdvo.c:3313) i915
kern :warn : [ 35.626889] ? fwtable_read16 (drivers/gpu/drm/i915/intel_uncore.c:1851) i915
kern :warn : [ 35.632481] intel_setup_outputs (drivers/gpu/drm/i915/display/intel_display.c:8005) i915
kern :warn : [ 35.638516] intel_modeset_init_nogem (drivers/gpu/drm/i915/display/intel_display.c:8764) i915
kern :warn : [ 35.644817] i915_driver_probe (drivers/gpu/drm/i915/i915_driver.c:966) i915
kern :warn : [ 35.650560] ? __mutex_unlock_slowpath+0x2a0/0x2a0
kern :warn : [ 35.657141] ? i915_print_iommu_status (drivers/gpu/drm/i915/i915_driver.c:889) i915
kern :warn : [ 35.663336] ? drm_privacy_screen_get (drivers/gpu/drm/drm_privacy_screen.c:167) drm
kern :warn : [ 35.669388] i915_pci_probe (drivers/gpu/drm/i915/i915_pci.c:1337) i915
kern :warn : [ 35.674966] ? i915_pci_remove (drivers/gpu/drm/i915/i915_pci.c:1305) i915
kern :warn : [ 35.680594] ? _raw_read_unlock_irqrestore (kernel/locking/spinlock.c:161)
kern :warn : [ 35.686339] ? __cond_resched (kernel/sched/core.c:8343)
kern :warn : [ 35.690950] ? i915_pci_remove (drivers/gpu/drm/i915/i915_pci.c:1305) i915
kern :warn : [ 35.696432] local_pci_probe (drivers/pci/pci-driver.c:324)
kern :warn : [ 35.701038] pci_call_probe (drivers/pci/pci-driver.c:392)
kern :warn : [ 35.705638] ? _raw_spin_lock (arch/x86/include/asm/atomic.h:202 include/linux/atomic/atomic-instrumented.h:543 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:186 include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154)
kern :warn : [ 35.710260] ? pci_pm_suspend_noirq (drivers/pci/pci-driver.c:352)
kern :warn : [ 35.715549] ? pci_assign_irq (drivers/pci/setup-irq.c:25)
kern :warn : [ 35.720242] ? pci_match_device (drivers/pci/pci-driver.c:108 drivers/pci/pci-driver.c:159)
kern :warn : [ 35.725190] ? kernfs_put (arch/x86/include/asm/atomic.h:123 (discriminator 1) include/linux/atomic/atomic-instrumented.h:576 (discriminator 1) fs/kernfs/dir.c:536 (discriminator 1))
kern :warn : [ 35.729449] pci_device_probe (drivers/pci/pci-driver.c:461)
kern :warn : [ 35.734150] really_probe (drivers/base/dd.c:560 drivers/base/dd.c:639)
kern :warn : [ 35.738596] __driver_probe_device (drivers/base/dd.c:719 drivers/base/dd.c:776)
kern :warn : [ 35.743827] driver_probe_device (drivers/base/dd.c:808)
kern :warn : [ 35.748787] __driver_attach (drivers/base/dd.c:1191)
kern :warn : [ 35.753494] ? __device_attach_driver (drivers/base/dd.c:1135)
kern :warn : [ 35.758968] bus_for_each_dev (drivers/base/bus.c:301)
kern :warn : [ 35.763741] ? subsys_dev_iter_exit (drivers/base/bus.c:290)
kern :warn : [ 35.768860] ? __kmem_cache_alloc_node (mm/slub.c:3400 mm/slub.c:3437)
kern :warn : [ 35.774388] ? klist_add_tail (include/linux/list.h:69 include/linux/list.h:102 lib/klist.c:104 lib/klist.c:137)
kern :warn : [ 35.779157] bus_add_driver (drivers/base/bus.c:618)
kern :warn : [ 35.783759] driver_register (drivers/base/driver.c:246)
kern :warn : [ 35.788442] i915_init (drivers/gpu/drm/i915/i915_driver.c:1078) i915
kern :warn : [ 35.793347] ? 0xffffffffa14e3000
kern :warn : [ 35.797404] do_one_initcall (init/main.c:1303)
kern :warn : [ 35.802026] ? trace_event_raw_event_initcall_level (init/main.c:1294)
kern :warn : [ 35.808719] ? __asan_register_globals (mm/kasan/generic.c:214 (discriminator 3) mm/kasan/generic.c:226 (discriminator 3))
kern :warn : [ 35.814120] ? kasan_unpoison (mm/kasan/shadow.c:108 mm/kasan/shadow.c:142)
kern :warn : [ 35.818735] do_init_module (kernel/module/main.c:2455)
kern :warn : [ 35.823348] load_module (kernel/module/main.c:2849)
kern :warn : [ 35.827859] ? post_relocation (kernel/module/main.c:2673)
kern :warn : [ 35.832716] ? __x64_sys_fspick (fs/kernel_read_file.c:38)
kern :warn : [ 35.837666] ? do_mmap (mm/mmap.c:1412)
kern :warn : [ 35.841947] ? __do_sys_finit_module (kernel/module/main.c:2949)
kern :warn : [ 35.847338] __do_sys_finit_module (kernel/module/main.c:2949)
kern :warn : [ 35.852552] ? __ia32_sys_init_module (kernel/module/main.c:2917)
kern :warn : [ 35.857850] ? fput (arch/x86/include/asm/atomic64_64.h:118 include/linux/atomic/atomic-long.h:467 include/linux/atomic/atomic-instrumented.h:1814 fs/file_table.c:371)
kern :warn : [ 35.861675] do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
kern :warn : [ 35.866017] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)
kern :warn : [ 35.871828] RIP: 0033:0x7f9cb95a33a9
kern :warn : [ 35.876164] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b7 8a 0d 00 f7 d8 64 89 01 48
All code
========
0: 00 c3 add %al,%bl
2: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
9: 00 00 00
c: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
11: 48 89 f8 mov %rdi,%rax
14: 48 89 f7 mov %rsi,%rdi
17: 48 89 d6 mov %rdx,%rsi
1a: 48 89 ca mov %rcx,%rdx
1d: 4d 89 c2 mov %r8,%r10
20: 4d 89 c8 mov %r9,%r8
23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9
28: 0f 05 syscall
2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction
30: 73 01 jae 0x33
32: c3 retq
33: 48 8b 0d b7 8a 0d 00 mov 0xd8ab7(%rip),%rcx # 0xd8af1
3a: f7 d8 neg %eax
3c: 64 89 01 mov %eax,%fs:(%rcx)
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax
6: 73 01 jae 0x9
8: c3 retq
9: 48 8b 0d b7 8a 0d 00 mov 0xd8ab7(%rip),%rcx # 0xd8ac7
10: f7 d8 neg %eax
12: 64 89 01 mov %eax,%fs:(%rcx)
15: 48 rex.W
If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <yujie.liu@...el.com>
| Link: https://lore.kernel.org/oe-lkp/202212120010.6de17419-yujie.liu@intel.com
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
sudo bin/lkp install job.yaml # job file is attached in this email
bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
sudo bin/lkp run generated-yaml-file
# if come across any failure that blocks the test,
# please remove ~/.lkp and /lkp dir to run from a clean state.
--
0-DAY CI Kernel Test Service
https://01.org/lkp
View attachment "config-6.1.0-rc8-00063-g22f82cbe7636" of type "text/plain" (171349 bytes)
View attachment "job-script" of type "text/plain" (6098 bytes)
Download attachment "kmsg.xz" of type "application/x-xz" (42676 bytes)
View attachment "xfstests" of type "text/plain" (1155 bytes)
View attachment "job.yaml" of type "text/plain" (4925 bytes)
View attachment "reproduce" of type "text/plain" (973 bytes)
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