On Thu, Jun 16, 2022 at 12:53:19AM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: c6d7e3b385f1 Add linux-next specific files for 20220616 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=1443dac3f00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=9d495405e4a98620 > dashboard link: https://syzkaller.appspot.com/bug?extid=ac3a03378e4deddd5f27 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+ac3a03378e4deddd5f27@xxxxxxxxxxxxxxxxxxxxxxxxx > > ------------[ cut here ]------------ > WARNING: CPU: 1 PID: 0 at kernel/context_tracking.c:335 ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 I am going to go out on a limb and suggest that Peter Zijlstra' recent idle-fix patch series is needed here. Thanx, Paul > ============================= > WARNING: suspicious RCU usage > 5.19.0-rc2-next-20220616-syzkaller #0 Not tainted > ----------------------------- > include/trace/events/lock.h:24 suspicious rcu_dereference_check() usage! > > other info that might help us debug this: > > > rcu_scheduler_active = 2, debug_locks = 1 > RCU used illegally from extended quiescent state! > no locks held by swapper/1/0. > > stack backtrace: > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.19.0-rc2-next-20220616-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Call Trace: > <TASK> > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 > trace_lock_acquire include/trace/events/lock.h:24 [inline] > lock_acquire.cold+0x1f/0x40 kernel/locking/lockdep.c:5636 > __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] > _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 > down_trylock+0xe/0x60 kernel/locking/semaphore.c:139 > __down_trylock_console_sem+0xfb/0x120 kernel/printk/printk.c:276 > console_trylock+0x13/0xd0 kernel/printk/printk.c:2731 > console_trylock_spinning kernel/printk/printk.c:2003 [inline] > vprintk_emit+0x127/0x680 kernel/printk/printk.c:2403 > vprintk+0x80/0x90 kernel/printk/printk_safe.c:52 > _printk+0xba/0xed kernel/printk/printk.c:2425 > __warn+0x91/0x190 kernel/panic.c:611 > report_bug+0x1bc/0x210 lib/bug.c:198 > handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316 > exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336 > asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 > RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 > Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 > RSP: 0018:ffffc90000187d78 EFLAGS: 00010206 > RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 > RDX: ffff888011a4ba80 RSI: 0000000000000200 RDI: 0000000000000000 > RBP: ffffffff8c7bf520 R08: 0000000000000005 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 > cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 > call_cpuidle kernel/sched/idle.c:155 [inline] > cpuidle_idle_call kernel/sched/idle.c:236 [inline] > do_idle+0x3e8/0x590 kernel/sched/idle.c:303 > cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 > start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:266 > secondary_startup_64_no_verify+0xce/0xdb > </TASK> > > ============================= > WARNING: suspicious RCU usage > 5.19.0-rc2-next-20220616-syzkaller #0 Not tainted > ----------------------------- > include/trace/events/lock.h:69 suspicious rcu_dereference_check() usage! > > other info that might help us debug this: > > > rcu_scheduler_active = 2, debug_locks = 1 > RCU used illegally from extended quiescent state! > 1 lock held by swapper/1/0: > #0: ffffffff8bd75ed8 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x60 kernel/locking/semaphore.c:139 > > stack backtrace: > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.19.0-rc2-next-20220616-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Call Trace: > <TASK> > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 > trace_lock_release include/trace/events/lock.h:69 [inline] > lock_release.cold+0x1f/0x4e kernel/locking/lockdep.c:5676 > __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline] > _raw_spin_unlock_irqrestore+0x16/0x70 kernel/locking/spinlock.c:194 > down_trylock+0x45/0x60 kernel/locking/semaphore.c:143 > __down_trylock_console_sem+0xfb/0x120 kernel/printk/printk.c:276 > console_trylock+0x13/0xd0 kernel/printk/printk.c:2731 > console_trylock_spinning kernel/printk/printk.c:2003 [inline] > vprintk_emit+0x127/0x680 kernel/printk/printk.c:2403 > vprintk+0x80/0x90 kernel/printk/printk_safe.c:52 > _printk+0xba/0xed kernel/printk/printk.c:2425 > __warn+0x91/0x190 kernel/panic.c:611 > report_bug+0x1bc/0x210 lib/bug.c:198 > handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316 > exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336 > asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 > RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 > Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 > RSP: 0018:ffffc90000187d78 EFLAGS: 00010206 > RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 > RDX: ffff888011a4ba80 RSI: 0000000000000200 RDI: 0000000000000000 > RBP: ffffffff8c7bf520 R08: 0000000000000005 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 > cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 > call_cpuidle kernel/sched/idle.c:155 [inline] > cpuidle_idle_call kernel/sched/idle.c:236 [inline] > do_idle+0x3e8/0x590 kernel/sched/idle.c:303 > cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 > start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:266 > secondary_startup_64_no_verify+0xce/0xdb > </TASK> > > ============================= > WARNING: suspicious RCU usage > 5.19.0-rc2-next-20220616-syzkaller #0 Not tainted > ----------------------------- > include/trace/events/sched.h:170 suspicious rcu_dereference_check() usage! > > other info that might help us debug this: > > > rcu_scheduler_active = 2, debug_locks = 1 > RCU used illegally from extended quiescent state! > 2 locks held by swapper/1/0: > #0: ffffffff8bd75ed8 ((console_sem).lock){-...}-{2:2}, at: up+0x12/0xb0 kernel/locking/semaphore.c:187 > #1: ffff888020960988 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xaa/0x17e0 kernel/sched/core.c:4084 > > stack backtrace: > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.19.0-rc2-next-20220616-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Call Trace: > <TASK> > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 > trace_sched_waking include/trace/events/sched.h:170 [inline] > trace_sched_waking include/trace/events/sched.h:170 [inline] > try_to_wake_up+0xe14/0x17e0 kernel/sched/core.c:4089 > up+0x75/0xb0 kernel/locking/semaphore.c:191 > __up_console_sem+0xa4/0xc0 kernel/printk/printk.c:293 > __console_unlock kernel/printk/printk.c:2831 [inline] > console_unlock+0x5e1/0x780 kernel/printk/printk.c:3078 > vprintk_emit+0x144/0x680 kernel/printk/printk.c:2404 > vprintk+0x80/0x90 kernel/printk/printk_safe.c:52 > _printk+0xba/0xed kernel/printk/printk.c:2425 > __warn+0x91/0x190 kernel/panic.c:611 > report_bug+0x1bc/0x210 lib/bug.c:198 > handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316 > exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336 > asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 > RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 > Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 > RSP: 0018:ffffc90000187d78 EFLAGS: 00010206 > RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 > RDX: ffff888011a4ba80 RSI: 0000000000000200 RDI: 0000000000000000 > RBP: ffffffff8c7bf520 R08: 0000000000000005 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 > cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 > call_cpuidle kernel/sched/idle.c:155 [inline] > cpuidle_idle_call kernel/sched/idle.c:236 [inline] > do_idle+0x3e8/0x590 kernel/sched/idle.c:303 > cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 > start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:266 > secondary_startup_64_no_verify+0xce/0xdb > </TASK> > > ============================= > WARNING: suspicious RCU usage > 5.19.0-rc2-next-20220616-syzkaller #0 Not tainted > ----------------------------- > include/linux/rcupdate.h:707 rcu_read_lock() used illegally while idle! > > other info that might help us debug this: > > > rcu_scheduler_active = 2, debug_locks = 1 > RCU used illegally from extended quiescent state! > 3 locks held by swapper/1/0: > #0: ffffffff8bd75ed8 ((console_sem).lock){-...}-{2:2}, at: up+0x12/0xb0 kernel/locking/semaphore.c:187 > #1: ffff888020960988 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xaa/0x17e0 kernel/sched/core.c:4084 > #2: ffffffff8bd87780 (rcu_read_lock){....}-{1:2}, at: select_task_rq_fair+0x269/0x3c40 kernel/sched/fair.c:6886 > > stack backtrace: > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.19.0-rc2-next-20220616-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Call Trace: > <TASK> > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 > rcu_read_lock include/linux/rcupdate.h:707 [inline] > select_task_rq_fair+0x649/0x3c40 kernel/sched/fair.c:6907 > select_task_rq kernel/sched/core.c:3495 [inline] > try_to_wake_up+0x3d6/0x17e0 kernel/sched/core.c:4185 > up+0x75/0xb0 kernel/locking/semaphore.c:191 > __up_console_sem+0xa4/0xc0 kernel/printk/printk.c:293 > __console_unlock kernel/printk/printk.c:2831 [inline] > console_unlock+0x5e1/0x780 kernel/printk/printk.c:3078 > vprintk_emit+0x144/0x680 kernel/printk/printk.c:2404 > vprintk+0x80/0x90 kernel/printk/printk_safe.c:52 > _printk+0xba/0xed kernel/printk/printk.c:2425 > __warn+0x91/0x190 kernel/panic.c:611 > report_bug+0x1bc/0x210 lib/bug.c:198 > handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316 > exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336 > asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 > RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 > Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 > RSP: 0018:ffffc90000187d78 EFLAGS: 00010206 > RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 > RDX: ffff888011a4ba80 RSI: 0000000000000200 RDI: 0000000000000000 > RBP: ffffffff8c7bf520 R08: 0000000000000005 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 > cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 > call_cpuidle kernel/sched/idle.c:155 [inline] > cpuidle_idle_call kernel/sched/idle.c:236 [inline] > do_idle+0x3e8/0x590 kernel/sched/idle.c:303 > cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 > start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:266 > secondary_startup_64_no_verify+0xce/0xdb > </TASK> > > ============================= > WARNING: suspicious RCU usage > 5.19.0-rc2-next-20220616-syzkaller #0 Not tainted > ----------------------------- > kernel/sched/fair.c:6908 suspicious rcu_dereference_check() usage! > > other info that might help us debug this: > > > rcu_scheduler_active = 2, debug_locks = 1 > RCU used illegally from extended quiescent state! > 3 locks held by swapper/1/0: > #0: ffffffff8bd75ed8 ((console_sem).lock){-...}-{2:2}, at: up+0x12/0xb0 kernel/locking/semaphore.c:187 > #1: ffff888020960988 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xaa/0x17e0 kernel/sched/core.c:4084 > #2: ffffffff8bd87780 (rcu_read_lock){....}-{1:2}, at: select_task_rq_fair+0x269/0x3c40 kernel/sched/fair.c:6886 > > stack backtrace: > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.19.0-rc2-next-20220616-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Call Trace: > <TASK> > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 > select_task_rq_fair+0x5e6/0x3c40 kernel/sched/fair.c:6908 > select_task_rq kernel/sched/core.c:3495 [inline] > try_to_wake_up+0x3d6/0x17e0 kernel/sched/core.c:4185 > up+0x75/0xb0 kernel/locking/semaphore.c:191 > __up_console_sem+0xa4/0xc0 kernel/printk/printk.c:293 > __console_unlock kernel/printk/printk.c:2831 [inline] > console_unlock+0x5e1/0x780 kernel/printk/printk.c:3078 > vprintk_emit+0x144/0x680 kernel/printk/printk.c:2404 > vprintk+0x80/0x90 kernel/printk/printk_safe.c:52 > _printk+0xba/0xed kernel/printk/printk.c:2425 > __warn+0x91/0x190 kernel/panic.c:611 > report_bug+0x1bc/0x210 lib/bug.c:198 > handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316 > exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336 > asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 > RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 > Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 > RSP: 0018:ffffc90000187d78 EFLAGS: 00010206 > RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 > RDX: ffff888011a4ba80 RSI: 0000000000000200 RDI: 0000000000000000 > RBP: ffffffff8c7bf520 R08: 0000000000000005 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 > cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 > call_cpuidle kernel/sched/idle.c:155 [inline] > cpuidle_idle_call kernel/sched/idle.c:236 [inline] > do_idle+0x3e8/0x590 kernel/sched/idle.c:303 > cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 > start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:266 > secondary_startup_64_no_verify+0xce/0xdb > </TASK> > > ============================= > WARNING: suspicious RCU usage > 5.19.0-rc2-next-20220616-syzkaller #0 Not tainted > ----------------------------- > kernel/sched/fair.c:6537 suspicious rcu_dereference_check() usage! > > other info that might help us debug this: > > > rcu_scheduler_active = 2, debug_locks = 1 > RCU used illegally from extended quiescent state! > 3 locks held by swapper/1/0: > #0: ffffffff8bd75ed8 ((console_sem).lock){-...}-{2:2}, at: up+0x12/0xb0 kernel/locking/semaphore.c:187 > #1: ffff888020960988 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xaa/0x17e0 kernel/sched/core.c:4084 > #2: ffffffff8bd87780 (rcu_read_lock){....}-{1:2}, at: select_task_rq_fair+0x269/0x3c40 kernel/sched/fair.c:6886 > > stack backtrace: > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.19.0-rc2-next-20220616-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Call Trace: > <TASK> > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 > select_idle_sibling kernel/sched/fair.c:6537 [inline] > select_task_rq_fair+0x2193/0x3c40 kernel/sched/fair.c:6938 > select_task_rq kernel/sched/core.c:3495 [inline] > try_to_wake_up+0x3d6/0x17e0 kernel/sched/core.c:4185 > up+0x75/0xb0 kernel/locking/semaphore.c:191 > __up_console_sem+0xa4/0xc0 kernel/printk/printk.c:293 > __console_unlock kernel/printk/printk.c:2831 [inline] > console_unlock+0x5e1/0x780 kernel/printk/printk.c:3078 > vprintk_emit+0x144/0x680 kernel/printk/printk.c:2404 > vprintk+0x80/0x90 kernel/printk/printk_safe.c:52 > _printk+0xba/0xed kernel/printk/printk.c:2425 > __warn+0x91/0x190 kernel/panic.c:611 > report_bug+0x1bc/0x210 lib/bug.c:198 > handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316 > exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336 > asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 > RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 > Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 > RSP: 0018:ffffc90000187d78 EFLAGS: 00010206 > RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 > RDX: ffff888011a4ba80 RSI: 0000000000000200 RDI: 0000000000000000 > RBP: ffffffff8c7bf520 R08: 0000000000000005 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 > cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 > call_cpuidle kernel/sched/idle.c:155 [inline] > cpuidle_idle_call kernel/sched/idle.c:236 [inline] > do_idle+0x3e8/0x590 kernel/sched/idle.c:303 > cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 > start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:266 > secondary_startup_64_no_verify+0xce/0xdb > </TASK> > > ============================= > WARNING: suspicious RCU usage > 5.19.0-rc2-next-20220616-syzkaller #0 Not tainted > ----------------------------- > kernel/sched/fair.c:6217 suspicious rcu_dereference_check() usage! > > other info that might help us debug this: > > > rcu_scheduler_active = 2, debug_locks = 1 > RCU used illegally from extended quiescent state! > 3 locks held by swapper/1/0: > #0: ffffffff8bd75ed8 ((console_sem).lock){-...}-{2:2}, at: up+0x12/0xb0 kernel/locking/semaphore.c:187 > #1: ffff888020960988 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xaa/0x17e0 kernel/sched/core.c:4084 > #2: ffffffff8bd87780 (rcu_read_lock){....}-{1:2}, at: select_task_rq_fair+0x269/0x3c40 kernel/sched/fair.c:6886 > > stack backtrace: > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.19.0-rc2-next-20220616-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Call Trace: > <TASK> > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 > test_idle_cores kernel/sched/fair.c:6217 [inline] > select_idle_sibling kernel/sched/fair.c:6542 [inline] > select_task_rq_fair+0x2a49/0x3c40 kernel/sched/fair.c:6938 > select_task_rq kernel/sched/core.c:3495 [inline] > try_to_wake_up+0x3d6/0x17e0 kernel/sched/core.c:4185 > up+0x75/0xb0 kernel/locking/semaphore.c:191 > __up_console_sem+0xa4/0xc0 kernel/printk/printk.c:293 > __console_unlock kernel/printk/printk.c:2831 [inline] > console_unlock+0x5e1/0x780 kernel/printk/printk.c:3078 > vprintk_emit+0x144/0x680 kernel/printk/printk.c:2404 > vprintk+0x80/0x90 kernel/printk/printk_safe.c:52 > _printk+0xba/0xed kernel/printk/printk.c:2425 > __warn+0x91/0x190 kernel/panic.c:611 > report_bug+0x1bc/0x210 lib/bug.c:198 > handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316 > exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336 > asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 > RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 > Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 > RSP: 0018:ffffc90000187d78 EFLAGS: 00010206 > RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 > RDX: ffff888011a4ba80 RSI: 0000000000000200 RDI: 0000000000000000 > RBP: ffffffff8c7bf520 R08: 0000000000000005 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 > cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 > call_cpuidle kernel/sched/idle.c:155 [inline] > cpuidle_idle_call kernel/sched/idle.c:236 [inline] > do_idle+0x3e8/0x590 kernel/sched/idle.c:303 > cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 > start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:266 > secondary_startup_64_no_verify+0xce/0xdb > </TASK> > > ============================= > WARNING: suspicious RCU usage > 5.19.0-rc2-next-20220616-syzkaller #0 Not tainted > ----------------------------- > kernel/sched/fair.c:6344 suspicious rcu_dereference_check() usage! > > other info that might help us debug this: > > > rcu_scheduler_active = 2, debug_locks = 1 > RCU used illegally from extended quiescent state! > 3 locks held by swapper/1/0: > #0: ffffffff8bd75ed8 ((console_sem).lock){-...}-{2:2}, at: up+0x12/0xb0 kernel/locking/semaphore.c:187 > #1: ffff888020960988 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xaa/0x17e0 kernel/sched/core.c:4084 > #2: ffffffff8bd87780 (rcu_read_lock){....}-{1:2}, at: select_task_rq_fair+0x269/0x3c40 kernel/sched/fair.c:6886 > > stack backtrace: > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.19.0-rc2-next-20220616-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Call Trace: > <TASK> > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 > select_idle_cpu kernel/sched/fair.c:6344 [inline] > select_idle_sibling kernel/sched/fair.c:6551 [inline] > select_task_rq_fair+0x2365/0x3c40 kernel/sched/fair.c:6938 > select_task_rq kernel/sched/core.c:3495 [inline] > try_to_wake_up+0x3d6/0x17e0 kernel/sched/core.c:4185 > up+0x75/0xb0 kernel/locking/semaphore.c:191 > __up_console_sem+0xa4/0xc0 kernel/printk/printk.c:293 > __console_unlock kernel/printk/printk.c:2831 [inline] > console_unlock+0x5e1/0x780 kernel/printk/printk.c:3078 > vprintk_emit+0x144/0x680 kernel/printk/printk.c:2404 > vprintk+0x80/0x90 kernel/printk/printk_safe.c:52 > _printk+0xba/0xed kernel/printk/printk.c:2425 > __warn+0x91/0x190 kernel/panic.c:611 > report_bug+0x1bc/0x210 lib/bug.c:198 > handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316 > exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336 > asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 > RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 > Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 > RSP: 0018:ffffc90000187d78 EFLAGS: 00010206 > RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 > RDX: ffff888011a4ba80 RSI: 0000000000000200 RDI: 0000000000000000 > RBP: ffffffff8c7bf520 R08: 0000000000000005 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 > cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 > call_cpuidle kernel/sched/idle.c:155 [inline] > cpuidle_idle_call kernel/sched/idle.c:236 [inline] > do_idle+0x3e8/0x590 kernel/sched/idle.c:303 > cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 > start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:266 > secondary_startup_64_no_verify+0xce/0xdb > </TASK> > > ============================= > WARNING: suspicious RCU usage > 5.19.0-rc2-next-20220616-syzkaller #0 Not tainted > ----------------------------- > include/linux/rcupdate.h:735 rcu_read_unlock() used illegally while idle! > > other info that might help us debug this: > > > rcu_scheduler_active = 2, debug_locks = 1 > RCU used illegally from extended quiescent state! > 3 locks held by swapper/1/0: > #0: ffffffff8bd75ed8 ((console_sem).lock){-...}-{2:2}, at: up+0x12/0xb0 kernel/locking/semaphore.c:187 > #1: ffff888020960988 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xaa/0x17e0 kernel/sched/core.c:4084 > #2: ffffffff8bd87780 (rcu_read_lock){....}-{1:2}, at: select_task_rq_fair+0x269/0x3c40 kernel/sched/fair.c:6886 > > stack backtrace: > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.19.0-rc2-next-20220616-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Call Trace: > <TASK> > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 > rcu_read_unlock include/linux/rcupdate.h:735 [inline] > select_task_rq_fair+0x59b/0x3c40 kernel/sched/fair.c:6940 > select_task_rq kernel/sched/core.c:3495 [inline] > try_to_wake_up+0x3d6/0x17e0 kernel/sched/core.c:4185 > up+0x75/0xb0 kernel/locking/semaphore.c:191 > __up_console_sem+0xa4/0xc0 kernel/printk/printk.c:293 > __console_unlock kernel/printk/printk.c:2831 [inline] > console_unlock+0x5e1/0x780 kernel/printk/printk.c:3078 > vprintk_emit+0x144/0x680 kernel/printk/printk.c:2404 > vprintk+0x80/0x90 kernel/printk/printk_safe.c:52 > _printk+0xba/0xed kernel/printk/printk.c:2425 > __warn+0x91/0x190 kernel/panic.c:611 > report_bug+0x1bc/0x210 lib/bug.c:198 > handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316 > exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336 > asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 > RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 > Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 > RSP: 0018:ffffc90000187d78 EFLAGS: 00010206 > RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 > RDX: ffff888011a4ba80 RSI: 0000000000000200 RDI: 0000000000000000 > RBP: ffffffff8c7bf520 R08: 0000000000000005 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 > cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 > call_cpuidle kernel/sched/idle.c:155 [inline] > cpuidle_idle_call kernel/sched/idle.c:236 [inline] > do_idle+0x3e8/0x590 kernel/sched/idle.c:303 > cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 > start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:266 > secondary_startup_64_no_verify+0xce/0xdb > </TASK> > Modules linked in: > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.19.0-rc2-next-20220616-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 > Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 > RSP: 0018:ffffc90000187d78 EFLAGS: 00010206 > RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 > RDX: ffff888011a4ba80 RSI: 0000000000000200 RDI: 0000000000000000 > RBP: ffffffff8c7bf520 R08: 0000000000000005 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000c000c9b000 CR3: 0000000079099000 CR4: 00000000003506e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <TASK> > cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 > cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 > call_cpuidle kernel/sched/idle.c:155 [inline] > cpuidle_idle_call kernel/sched/idle.c:236 [inline] > do_idle+0x3e8/0x590 kernel/sched/idle.c:303 > cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 > start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:266 > secondary_startup_64_no_verify+0xce/0xdb > </TASK> > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
