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Date: Wed, 17 Jan 2024 23:07:14 +0800
From: kernel test robot <oliver.sang@intel.com>
To: David Howells <dhowells@redhat.com>
CC: <oe-lkp@lists.linux.dev>, <lkp@intel.com>, <linux-kernel@vger.kernel.org>,
	Marc Dionne <marc.dionne@auristor.com>, <linux-afs@lists.infradead.org>,
	<oliver.sang@intel.com>
Subject: [linus:master] [afs]  f94f70d39c: WARNING:suspicious_RCU_usage
Message-ID: <202401172243.cd53d5f6-oliver.sang@intel.com>
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Hello,

kernel test robot noticed "WARNING:suspicious_RCU_usage" on:

commit: f94f70d39cc2d54079ebae934862198516315db2 ("afs: Provide a way to configure address priorities")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

[test failed on linus/master 052d534373b7ed33712a63d5e17b2b6cdbce84fd]
[test failed on linux-next/master 8d04a7e2ee3fd6aabb8096b00c64db0d735bc874]

in testcase: trinity
version: trinity-i386-abe9de86-1_20230429
with following parameters:

	runtime: 300s
	group: group-01
	nr_groups: 5

test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/


compiler: gcc-12
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

(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@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202401172243.cd53d5f6-oliver.sang@intel.com


[  463.480579][ T6166] 
[  463.481694][ T6166] =============================
[  463.482931][ T6166] WARNING: suspicious RCU usage
[  463.484158][ T6166] 6.7.0-rc7-00024-gf94f70d39cc2 #1 Tainted: G        W        N
[  463.485385][ T6166] -----------------------------
[  463.486196][ T6166] include/linux/rcupdate.h:373 Illegal context switch in RCU read-side critical section!
[  463.488096][ T6166] 
[  463.488096][ T6166] other info that might help us debug this:
[  463.488096][ T6166] 
[  463.490824][ T6166] 
[  463.490824][ T6166] rcu_scheduler_active = 2, debug_locks = 1
[  463.493075][ T6166] 3 locks held by trinity-c4/6166:
[  463.494415][ T6166]  #0: eafe0bac (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x42/0x64
[  463.496294][ T6166]  #1: ca58af5c (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0x43/0x470
[  463.497496][ T6166]  #2: c42177b0 (rcu_read_lock){....}-{1:2}, at: afs_proc_addr_prefs_show+0x28/0x284
[  463.499479][ T6166] 
[  463.499479][ T6166] stack backtrace:
[  463.500797][ T6166] CPU: 1 PID: 6166 Comm: trinity-c4 Tainted: G        W        N 6.7.0-rc7-00024-gf94f70d39cc2 #1 8c9fc74f21af2a18f53bcba9406b4039ea273cf9
[  463.503266][ T6166] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[  463.505486][ T6166] Call Trace:
[  463.506253][ T6166]  dump_stack_lvl+0x9a/0xdc
[  463.507029][ T6166]  dump_stack+0xd/0x14
[  463.507855][ T6166]  lockdep_rcu_suspicious+0x127/0x16c
[  463.508791][ T6166]  __might_resched+0x284/0x2b4
[  463.509656][ T6166]  __might_sleep+0x2e/0x80
[  463.510560][ T6166]  __might_fault+0x29/0x78
[  463.511471][ T6166]  _copy_to_iter+0x2e/0x560
[  463.512204][ T6166]  ? __check_heap_object+0x32/0xc8
[  463.513205][ T6166]  ? check_heap_object+0x16b/0x19c
[  463.514017][ T6166]  ? __check_object_size+0x5e/0x118
[  463.515030][ T6166]  seq_read_iter+0x3bc/0x470
[  463.515900][ T6166]  seq_read+0x7f/0x9c
[  463.516669][ T6166]  ? seq_read_iter+0x470/0x470
[  463.517552][ T6166]  proc_reg_read+0x60/0x90
[  463.518321][ T6166]  ? proc_reg_write+0x90/0x90
[  463.519126][ T6166]  do_loop_readv_writev+0x4a/0xb4
[  463.520161][ T6166]  do_iter_read+0x105/0x170
[  463.521040][ T6166]  do_readv+0xac/0x190
[  463.521836][ T6166]  __ia32_sys_readv+0x12/0x18
[  463.522679][ T6166]  __do_fast_syscall_32+0x72/0xd8
[  463.523573][ T6166]  ? find_held_lock+0x24/0x74
[  463.524397][ T6166]  ? __lock_release+0x4a/0x14c
[  463.525397][ T6166]  ? __task_pid_nr_ns+0x78/0x1fc
[  463.526245][ T6166]  ? syscall_exit_work+0xe8/0x11c
[  463.527101][ T6166]  ? lockdep_hardirqs_on_prepare+0xa4/0x154
[  463.528145][ T6166]  ? syscall_exit_to_user_mode+0x3a/0x50
[  463.529118][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.529997][ T6166]  ? syscall_exit_to_user_mode+0x3a/0x50
[  463.530959][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.531870][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.532739][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.533630][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.534507][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.535362][ T6166]  ? irqentry_exit_to_user_mode+0x28/0x2c
[  463.536356][ T6166]  ? irqentry_exit+0x7f/0xc8
[  463.537187][ T6166]  do_fast_syscall_32+0x29/0x60
[  463.538014][ T6166]  do_SYSENTER_32+0x15/0x28
[  463.538782][ T6166]  entry_SYSENTER_32+0xa2/0xfb
[  463.539573][ T6166] EIP: 0xb7f97579
[  463.540223][ T6166] Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76
[  463.543212][ T6166] EAX: ffffffda EBX: 000000f0 ECX: 026d6120 EDX: 00000098
[  463.544449][ T6166] ESI: 28282828 EDI: f0309dea EBP: 000000c2 ESP: bfa8f62c
[  463.545572][ T6166] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000296
[  463.546837][ T6166] BUG: sleeping function called from invalid context at lib/iov_iter.c:185
[  463.548162][ T6166] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6166, name: trinity-c4
[  463.548958][ T6166] preempt_count: 1, expected: 0
[  463.549406][ T6166] 3 locks held by trinity-c4/6166:
[  463.550089][ T6166]  #0: eafe0bac (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x42/0x64
[  463.551473][ T6166]  #1: ca58af5c (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0x43/0x470
[  463.552840][ T6166]  #2: c42177b0 (rcu_read_lock){....}-{1:2}, at: afs_proc_addr_prefs_show+0x28/0x284
[  463.554393][ T6166] CPU: 1 PID: 6166 Comm: trinity-c4 Tainted: G        W        N 6.7.0-rc7-00024-gf94f70d39cc2 #1 8c9fc74f21af2a18f53bcba9406b4039ea273cf9
[  463.555905][ T6166] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[  463.557701][ T6166] Call Trace:
[  463.558373][ T6166]  dump_stack_lvl+0x9a/0xdc
[  463.559211][ T6166]  dump_stack+0xd/0x14
[  463.560000][ T6166]  __might_resched+0x13d/0x2b4
[  463.560840][ T6166]  __might_sleep+0x2e/0x80
[  463.561674][ T6166]  __might_fault+0x29/0x78
[  463.562476][ T6166]  _copy_to_iter+0x2e/0x560
[  463.563270][ T6166]  ? __check_heap_object+0x32/0xc8
[  463.564106][ T6166]  ? check_heap_object+0x16b/0x19c
[  463.565052][ T6166]  ? __check_object_size+0x5e/0x118
[  463.565935][ T6166]  seq_read_iter+0x3bc/0x470
[  463.566735][ T6166]  seq_read+0x7f/0x9c
[  463.567450][ T6166]  ? seq_read_iter+0x470/0x470
[  463.568297][ T6166]  proc_reg_read+0x60/0x90
[  463.569119][ T6166]  ? proc_reg_write+0x90/0x90
[  463.569926][ T6166]  do_loop_readv_writev+0x4a/0xb4
[  463.570855][ T6166]  do_iter_read+0x105/0x170
[  463.571623][ T6166]  do_readv+0xac/0x190
[  463.572011][ T6166]  __ia32_sys_readv+0x12/0x18
[  463.572437][ T6166]  __do_fast_syscall_32+0x72/0xd8
[  463.572890][ T6166]  ? find_held_lock+0x24/0x74
[  463.573320][ T6166]  ? __lock_release+0x4a/0x14c
[  463.573791][ T6166]  ? __task_pid_nr_ns+0x78/0x1fc
[  463.574233][ T6166]  ? syscall_exit_work+0xe8/0x11c
[  463.574682][ T6166]  ? lockdep_hardirqs_on_prepare+0xa4/0x154
[  463.577047][ T6166]  ? syscall_exit_to_user_mode+0x3a/0x50
[  463.577546][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.578005][ T6166]  ? syscall_exit_to_user_mode+0x3a/0x50
[  463.578496][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.578954][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.579408][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.579868][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.580330][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.580796][ T6166]  ? irqentry_exit_to_user_mode+0x28/0x2c
[  463.581306][ T6166]  ? irqentry_exit+0x7f/0xc8
[  463.581726][ T6166]  do_fast_syscall_32+0x29/0x60
[  463.582160][ T6166]  do_SYSENTER_32+0x15/0x28
[  463.582581][ T6166]  entry_SYSENTER_32+0xa2/0xfb
[  463.583021][ T6166] EIP: 0xb7f97579
[  463.583376][ T6166] Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76
[  463.585266][ T6166] EAX: ffffffda EBX: 000000f0 ECX: 026d6120 EDX: 00000098
[  463.585879][ T6166] ESI: 28282828 EDI: f0309dea EBP: 000000c2 ESP: bfa8f62c
[  463.586476][ T6166] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000296
[  463.587208][ T6166] 
[  463.587463][ T6166] =============================
[  463.587892][ T6166] [ BUG: Invalid wait context ]
[  463.588326][ T6166] 6.7.0-rc7-00024-gf94f70d39cc2 #1 Tainted: G        W        N
[  463.588990][ T6166] -----------------------------
[  463.589774][ T6166] trinity-c4/6166 is trying to lock:
[  463.590685][ T6166] edb6caf8 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0x33/0x78
[  463.592172][ T6166] other info that might help us debug this:
[  463.593196][ T6166] context-{4:4}
[  463.593900][ T6166] 3 locks held by trinity-c4/6166:
[  463.594815][ T6166]  #0: eafe0bac (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x42/0x64
[  463.596352][ T6166]  #1: ca58af5c (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0x43/0x470
[  463.597784][ T6166]  #2: c42177b0 (rcu_read_lock){....}-{1:2}, at: afs_proc_addr_prefs_show+0x28/0x284
[  463.599462][ T6166] stack backtrace:
[  463.600186][ T6166] CPU: 1 PID: 6166 Comm: trinity-c4 Tainted: G        W        N 6.7.0-rc7-00024-gf94f70d39cc2 #1 8c9fc74f21af2a18f53bcba9406b4039ea273cf9
[  463.602527][ T6166] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[  463.604314][ T6166] Call Trace:
[  463.604966][ T6166]  dump_stack_lvl+0x6a/0xdc
[  463.605815][ T6166]  dump_stack+0xd/0x14
[  463.606518][ T6166]  __lock_acquire+0x819/0xab4
[  463.607301][ T6166]  ? handle_exception+0x14d/0x14d
[  463.608188][ T6166]  lock_acquire+0x88/0x24c
[  463.609025][ T6166]  ? __might_fault+0x33/0x78
[  463.609885][ T6166]  ? dump_stack+0xd/0x14
[  463.610678][ T6166]  ? __might_resched+0x149/0x2b4
[  463.611570][ T6166]  __might_fault+0x52/0x78
[  463.612346][ T6166]  ? __might_fault+0x33/0x78
[  463.613091][ T6166]  _copy_to_iter+0x2e/0x560
[  463.613884][ T6166]  ? __check_heap_object+0x32/0xc8
[  463.614734][ T6166]  ? check_heap_object+0x16b/0x19c
[  463.615576][ T6166]  ? __check_object_size+0x5e/0x118
[  463.616409][ T6166]  seq_read_iter+0x3bc/0x470
[  463.617267][ T6166]  seq_read+0x7f/0x9c
[  463.617968][ T6166]  ? seq_read_iter+0x470/0x470
[  463.618746][ T6166]  proc_reg_read+0x60/0x90
[  463.619605][ T6166]  ? proc_reg_write+0x90/0x90
[  463.620463][ T6166]  do_loop_readv_writev+0x4a/0xb4
[  463.621425][ T6166]  do_iter_read+0x105/0x170
[  463.622206][ T6166]  do_readv+0xac/0x190
[  463.622979][ T6166]  __ia32_sys_readv+0x12/0x18
[  463.623772][ T6166]  __do_fast_syscall_32+0x72/0xd8
[  463.624696][ T6166]  ? find_held_lock+0x24/0x74
[  463.625509][ T6166]  ? __lock_release+0x4a/0x14c
[  463.626438][ T6166]  ? __task_pid_nr_ns+0x78/0x1fc
[  463.627291][ T6166]  ? syscall_exit_work+0xe8/0x11c
[  463.628124][ T6166]  ? lockdep_hardirqs_on_prepare+0xa4/0x154
[  463.629190][ T6166]  ? syscall_exit_to_user_mode+0x3a/0x50
[  463.630134][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.631033][ T6166]  ? syscall_exit_to_user_mode+0x3a/0x50
[  463.631985][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.632844][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.633769][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.634643][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.635509][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.636422][ T6166]  ? irqentry_exit_to_user_mode+0x28/0x2c
[  463.637387][ T6166]  ? irqentry_exit+0x7f/0xc8
[  463.638147][ T6166]  do_fast_syscall_32+0x29/0x60
[  463.639006][ T6166]  do_SYSENTER_32+0x15/0x28
[  463.639801][ T6166]  entry_SYSENTER_32+0xa2/0xfb
[  463.640619][ T6166] EIP: 0xb7f97579
[  463.641254][ T6166] Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76
[  463.644248][ T6166] EAX: ffffffda EBX: 000000f0 ECX: 026d6120 EDX: 00000098
[  463.645377][ T6166] ESI: 28282828 EDI: f0309dea EBP: 000000c2 ESP: bfa8f62c
[  463.646509][ T6166] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000296
[  463.647839][ T6166] BUG: scheduling while atomic: trinity-c4/6166/0x00000002
[  463.648647][ T6166] INFO: lockdep is turned off.
[  463.649073][ T6166] Modules linked in:
[  463.649442][ T6166] CPU: 1 PID: 6166 Comm: trinity-c4 Tainted: G        W        N 6.7.0-rc7-00024-gf94f70d39cc2 #1 8c9fc74f21af2a18f53bcba9406b4039ea273cf9
[  463.651023][ T6166] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[  463.652664][ T6166] Call Trace:
[  463.653262][ T6166]  dump_stack_lvl+0x9a/0xdc
[  463.654054][ T6166]  dump_stack+0xd/0x14
[  463.654530][ T6166]  __schedule_bug+0x5e/0x84
[  463.655373][ T6166]  schedule_debug+0x1e3/0x218
[  463.656163][ T6166]  __schedule+0x4d/0x774
[  463.656896][ T6166]  schedule+0x3b/0x130
[  463.657618][ T6166]  exit_to_user_mode_prepare+0xb9/0x1f0
[  463.658529][ T6166]  syscall_exit_to_user_mode+0x1a/0x50
[  463.659522][ T6166]  __do_fast_syscall_32+0x7c/0xd8
[  463.660434][ T6166]  ? find_held_lock+0x24/0x74
[  463.661236][ T6166]  ? __lock_release+0x4a/0x14c
[  463.662112][ T6166]  ? __task_pid_nr_ns+0x78/0x1fc
[  463.662933][ T6166]  ? syscall_exit_work+0xe8/0x11c
[  463.663835][ T6166]  ? lockdep_hardirqs_on_prepare+0xa4/0x154
[  463.664901][ T6166]  ? syscall_exit_to_user_mode+0x3a/0x50
[  463.665826][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.666757][ T6166]  ? syscall_exit_to_user_mode+0x3a/0x50
[  463.667763][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.668716][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.669590][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.670485][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.671345][ T6166]  ? __do_fast_syscall_32+0x7c/0xd8
[  463.672263][ T6166]  ? irqentry_exit_to_user_mode+0x28/0x2c
[  463.673209][ T6166]  ? irqentry_exit+0x7f/0xc8
[  463.673998][ T6166]  do_fast_syscall_32+0x29/0x60
[  463.674808][ T6166]  do_SYSENTER_32+0x15/0x28
[  463.675583][ T6166]  entry_SYSENTER_32+0xa2/0xfb
[  463.676478][ T6166] EIP: 0xb7f97579
[  463.677205][ T6166] Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76
[  463.680209][ T6166] EAX: 00000009 EBX: 000000f0 ECX: 026d6120 EDX: 00000098
[  463.681363][ T6166] ESI: 28282828 EDI: f0309dea EBP: 000000c2 ESP: bfa8f62c
[  463.682516][ T6166] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000296


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240117/202401172243.cd53d5f6-oliver.sang@intel.com


-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki