Re: [PATCH v3 9/9] scsi:scsi_debug: Add debugfs interface to fail target reset
From: haowenchao (C)
Date: Tue Aug 15 2023 - 08:11:16 EST
On 2023/8/3 14:26, kernel test robot wrote:
Hello,
kernel test robot noticed "BUG:sleeping_function_called_from_invalid_context_at_kernel/locking/rwsem.c" on:
commit: b75b216522fef4d99e145fd9a1535db987ef2836 ("[PATCH v3 9/9] scsi:scsi_debug: Add debugfs interface to fail target reset")
url: https://github.com/intel-lab-lkp/linux/commits/Wenchao-Hao/scsi-scsi_debug-create-scsi_debug-directory-in-the-debugfs-filesystem/20230723-182123
base: https://git.kernel.org/cgit/linux/kernel/git/mkp/scsi.git for-next
patch link: https://lore.kernel.org/all/20230723234105.1628982-10-haowenchao2@xxxxxxxxxx/
patch subject: [PATCH v3 9/9] scsi:scsi_debug: Add debugfs interface to fail target reset
in testcase: xfstests
version: xfstests-x86_64-bb8af9c-1_20230801
with following parameters:
disk: 4HDD
fs: ext4
test: generic-350
compiler: gcc-12
test machine: 4 threads Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz (Skylake) with 32G memory
(please refer to attached dmesg/kmsg for entire log/backtrace)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202308031027.5941ce5f-oliver.sang@xxxxxxxxx
Would be fixed in v4 patch.
[ 224.728219][ T2216] BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1572
[ 224.737418][ T2216] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 2216, name: modprobe
[ 224.746095][ T2216] preempt_count: 1, expected: 0
[ 224.750787][ T2216] RCU nest depth: 0, expected: 0
[ 224.755564][ T2216] CPU: 3 PID: 2216 Comm: modprobe Tainted: G I 6.5.0-rc1-00013-gb75b216522fe #1
[ 224.765799][ T2216] Hardware name: Dell Inc. OptiPlex 7040/0Y7WYT, BIOS 1.1.1 10/07/2015
[ 224.773867][ T2216] Call Trace:
[ 224.777011][ T2216] <TASK>
[ 224.779796][ T2216] dump_stack_lvl (lib/dump_stack.c:107 (discriminator 1))
[ 224.784146][ T2216] __might_resched (kernel/sched/core.c:10190)
[ 224.788753][ T2216] ? preempt_notifier_dec (kernel/sched/core.c:10144)
[ 224.793792][ T2216] ? preempt_notifier_dec (kernel/sched/core.c:10144)
[ 224.798851][ T2216] down_write (include/linux/kernel.h:111 kernel/locking/rwsem.c:1572)
[ 224.802936][ T2216] ? rwsem_down_write_slowpath (kernel/locking/rwsem.c:1571)
[ 224.808582][ T2216] ? kobject_put (arch/x86/include/asm/atomic.h:103 include/linux/atomic/atomic-arch-fallback.h:940 include/linux/atomic/atomic-instrumented.h:401 include/linux/refcount.h:272 include/linux/refcount.h:315 include/linux/refcount.h:333 include/linux/kref.h:64 lib/kobject.c:730)
[ 224.812858][ T2216] simple_recursive_removal (include/linux/dcache.h:385 include/linux/dcache.h:400 include/linux/dcache.h:410 fs/libfs.c:273)
[ 224.818256][ T2216] ? start_creating (fs/tracefs/inode.c:135)
[ 224.823555][ T2216] ? _raw_spin_lock_irqsave (arch/x86/include/asm/atomic.h:115 include/linux/atomic/atomic-arch-fallback.h:2155 include/linux/atomic/atomic-instrumented.h:1296 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:187 include/linux/spinlock_api_smp.h:111 kernel/locking/spinlock.c:162)
[ 224.828766][ T2216] ? _raw_read_unlock_irqrestore (kernel/locking/spinlock.c:161)
[ 224.834412][ T2216] debugfs_remove (fs/debugfs/inode.c:766)
[ 224.838758][ T2216] sdebug_target_destroy (drivers/scsi/scsi_debug.c:1147) scsi_debug
[ 224.844874][ T2216] scsi_target_destroy (drivers/scsi/scsi_scan.c:401)
[ 224.849830][ T2216] __scsi_remove_device (drivers/scsi/scsi_sysfs.c:1517)
[ 224.854889][ T2216] scsi_forget_host (drivers/scsi/scsi_scan.c:1988)
[ 224.859508][ T2216] scsi_remove_host (drivers/scsi/hosts.c:182)
[ 224.864113][ T2216] sdebug_driver_remove (drivers/scsi/scsi_debug.c:8342) scsi_debug
[ 224.870201][ T2216] ? kernfs_remove_by_name_ns (fs/kernfs/dir.c:1679)
[ 224.875758][ T2216] device_release_driver_internal (drivers/base/dd.c:1272 drivers/base/dd.c:1293)
[ 224.881662][ T2216] bus_remove_device (include/linux/kobject.h:191 drivers/base/base.h:73 drivers/base/bus.c:581)
[ 224.886442][ T2216] device_del (drivers/base/core.c:3815)
[ 224.890616][ T2216] ? __device_link_del (drivers/base/core.c:3769)
[ 224.895567][ T2216] ? mutex_unlock (arch/x86/include/asm/atomic64_64.h:109 include/linux/atomic/atomic-arch-fallback.h:4303 include/linux/atomic/atomic-long.h:1499 include/linux/atomic/atomic-instrumented.h:4446 kernel/locking/mutex.c:181 kernel/locking/mutex.c:540)
[ 224.899915][ T2216] ? __mutex_unlock_slowpath+0x2b0/0x2b0
[ 224.906427][ T2216] device_unregister (drivers/base/core.c:3732 drivers/base/core.c:3845)
[ 224.911038][ T2216] sdebug_do_remove_host (drivers/scsi/scsi_debug.c:7691) scsi_debug
[ 224.917309][ T2216] scsi_debug_exit (drivers/scsi/scsi_debug.c:8170) scsi_debug
[ 224.922889][ T2216] __do_sys_delete_module+0x316/0x540
[ 224.929162][ T2216] ? module_flags (kernel/module/main.c:698)
[ 224.933689][ T2216] ? task_work_cancel (kernel/task_work.c:147)
[ 224.938388][ T2216] ? _raw_spin_lock (arch/x86/include/asm/atomic.h:115 include/linux/atomic/atomic-arch-fallback.h:2155 include/linux/atomic/atomic-instrumented.h:1296 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:187 include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154)
[ 224.942921][ T2216] ? exit_to_user_mode_loop (include/linux/sched.h:2337 include/linux/resume_user_mode.h:61 kernel/entry/common.c:171)
[ 224.948222][ T2216] do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
[ 224.952483][ T2216] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)
[ 224.958217][ T2216] RIP: 0033:0x7fe4243fc417
[ 224.962479][ T2216] Code: 73 01 c3 48 8b 0d 79 1a 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 49 1a 0d 00 f7 d8 64 89 01 48
All code
========
0: 73 01 jae 0x3
2: c3 retq
3: 48 8b 0d 79 1a 0d 00 mov 0xd1a79(%rip),%rcx # 0xd1a83
a: f7 d8 neg %eax
c: 64 89 01 mov %eax,%fs:(%rcx)
f: 48 83 c8 ff or $0xffffffffffffffff,%rax
13: c3 retq
14: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
1b: 00 00 00
1e: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
23: b8 b0 00 00 00 mov $0xb0,%eax
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 49 1a 0d 00 mov 0xd1a49(%rip),%rcx # 0xd1a83
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 49 1a 0d 00 mov 0xd1a49(%rip),%rcx # 0xd1a59
10: f7 d8 neg %eax
12: 64 89 01 mov %eax,%fs:(%rcx)
15: 48 rex.W
[ 224.981910][ T2216] RSP: 002b:00007ffc194cd048 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
[ 224.990153][ T2216] RAX: ffffffffffffffda RBX: 00005641e66c7c70 RCX: 00007fe4243fc417
[ 224.997962][ T2216] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 00005641e66c7cd8
[ 225.005769][ T2216] RBP: 00005641e66c7c70 R08: 0000000000000000 R09: 0000000000000000
[ 225.013579][ T2216] R10: 00007fe42447cac0 R11: 0000000000000206 R12: 00005641e66c7cd8
[ 225.021386][ T2216] R13: 0000000000000000 R14: 0000000000000000 R15: 00005641e66c7df0
[ 225.029197][ T2216] </TASK>
[ 225.355582][ T2223] EXT4-fs (sda1): unmounting filesystem fc80755b-20bd-48b4-996a-4bc58040c94e.
[ 225.676238][ T277] generic/350 _check_dmesg: something found in dmesg (see /lkp/benchmarks/xfstests/results//generic/350.dmesg)
[ 225.676268][ T277]
[ 304.321275][ T277]
[ 304.321304][ T277]
[ 304.343153][ T277] Ran: generic/350
[ 304.343170][ T277]
[ 304.349423][ T277] Failures: generic/350
[ 304.349436][ T277]
[ 304.356135][ T277] Failed 1 of 1 tests
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.