On Wed, Mar 27, 2024 at 2:39 PM syzbot <syzbot+81f5ca46b043d4a1b789@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=121a9e21180000 > kernel config: https://syzkaller.appspot.com/x/.config?x=aef2a55903e5791c > dashboard link: https://syzkaller.appspot.com/bug?extid=81f5ca46b043d4a1b789 > compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12104f9e180000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=112840ee180000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/089e25869df5/disk-fe46a7dd.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/423b1787914f/vmlinux-fe46a7dd.xz > kernel image: https://storage.googleapis.com/syzbot-assets/4c043e30c07d/bzImage-fe46a7dd.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+81f5ca46b043d4a1b789@xxxxxxxxxxxxxxxxxxxxxxxxx This doesn't look to be audit related, but I do see something that may be related in the printk code which was just merged into Linus' tree: commit 8076972468584d4a21dab9aa50e388b3ea9ad8c7 Author: John Ogness <john.ogness@xxxxxxxxxxxxx> Date: Mon Feb 26 13:07:24 2024 +0106 printk: Update @console_may_schedule in console_trylock_spinning() console_trylock_spinning() may takeover the console lock from a schedulable context. Update @console_may_schedule to make sure it reflects a trylock acquire. Reported-by: Mukesh Ojha <quic_mojha@xxxxxxxxxxx> Closes: https://lore.kernel.org/lkml/20240222090538.23017-1-quic_mojha@xxxxxxxxxxx Fixes: dbdda842fe96 ("printk: Add console owner and ...") Signed-off-by: John Ogness <john.ogness@xxxxxxxxxxxxx> Reviewed-by: Mukesh Ojha <quic_mojha@xxxxxxxxxxx> Reviewed-by: Petr Mladek <pmladek@xxxxxxxx> Link: https://lore.kernel.org/r/875xybmo2z.fsf@xxxxxxxxxxxxxxxxxxxxx Signed-off-by: Petr Mladek <pmladek@xxxxxxxx> > rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: > rcu: 1-...!: (1 ticks this GP) idle=9bf4/1/0x4000000000000000 softirq=6591/6591 fqs=5 > rcu: (detected by 0, t=10502 jiffies, g=7873, q=65 ncpus=2) > Sending NMI from CPU 0 to CPUs 1: > NMI backtrace for cpu 1 > CPU: 1 PID: 28 Comm: kauditd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 > RIP: 0010:write_comp_data+0x0/0x90 kernel/kcov.c:230 > Code: 48 8b 05 13 e2 76 7e 48 8b 80 08 16 00 00 c3 cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <49> 89 d2 49 89 f8 49 89 f1 65 48 8b 15 df e1 76 7e 65 8b 05 e0 e1 > RSP: 0018:ffffc90000a08d78 EFLAGS: 00000046 > RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff88e73a44 > RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000005 > RBP: 000000000003d3cc R08: 0000000000000005 R09: 0000000000000000 > R10: 0000000000000001 R11: 0000000000000002 R12: ffff8880b952cac0 > R13: ffff88802abeb340 R14: ffff88802abeb340 R15: ffffffff88e73220 > FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000555582f0dca8 CR3: 000000002bcea000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <NMI> > </NMI> > <IRQ> > advance_sched+0x824/0xc60 net/sched/sch_taprio.c:925 > __run_hrtimer kernel/time/hrtimer.c:1692 [inline] > __hrtimer_run_queues+0x20c/0xc20 kernel/time/hrtimer.c:1756 > hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1818 > local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] > __sysvec_apic_timer_interrupt+0x10f/0x410 arch/x86/kernel/apic/apic.c:1049 > instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] > sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 > </IRQ> > <TASK> > asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 > RIP: 0010:console_flush_all+0xa19/0xd70 kernel/printk/printk.c:2979 > Code: e8 9c dd 25 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 0a c9 1e 00 48 85 db 0f 85 8b 01 00 00 e8 ec cd 1e 00 fb 48 8b 04 24 <4c> 89 fa 83 e2 07 0f b6 00 38 d0 7f 08 84 c0 0f 85 a9 02 00 00 41 > RSP: 0018:ffffc90000a47a98 EFLAGS: 00000293 > RAX: fffff52000148f7a RBX: 0000000000000000 RCX: ffffffff816e2ab6 > RDX: ffff888018ee9e00 RSI: ffffffff816e2ac4 RDI: 0000000000000007 > RBP: dffffc0000000000 R08: 0000000000000007 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000200 > R13: ffffffff8e3995f8 R14: ffffffff8e3995a0 R15: ffffc90000a47bd0 > console_unlock+0xae/0x290 kernel/printk/printk.c:3042 > vprintk_emit kernel/printk/printk.c:2342 [inline] > vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2297 > vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45 > _printk+0xc8/0x100 kernel/printk/printk.c:2367 > kauditd_printk_skb kernel/audit.c:546 [inline] > kauditd_hold_skb+0x1fb/0x240 kernel/audit.c:581 > kauditd_send_queue+0x236/0x290 kernel/audit.c:766 > kauditd_thread+0x61e/0xa80 kernel/audit.c:890 > kthread+0x2c1/0x3a0 kernel/kthread.c:388 > ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 > </TASK> > INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.415 msecs > rcu: rcu_preempt kthread starved for 10491 jiffies! g7873 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 > rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. > rcu: RCU grace-period kthread stack dump: > task:rcu_preempt state:R running task stack:28304 pid:16 tgid:16 ppid:2 flags:0x00004000 > Call Trace: > <TASK> > context_switch kernel/sched/core.c:5409 [inline] > __schedule+0xf15/0x5c70 kernel/sched/core.c:6736 > __schedule_loop kernel/sched/core.c:6813 [inline] > schedule+0xe7/0x350 kernel/sched/core.c:6828 > schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2572 > rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:1663 > rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:1862 > kthread+0x2c1/0x3a0 kernel/kthread.c:388 > ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 > </TASK> > rcu: Stack dump where RCU GP kthread last ran: > CPU: 0 PID: 43 Comm: kworker/u8:3 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 > Workqueue: events_unbound toggle_allocation_gate > RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline] > RIP: 0010:smp_call_function_many_cond+0x4e7/0x1590 kernel/smp.c:855 > Code: 0c 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 4b 05 0c 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 5d 0e 00 00 8b 43 08 31 > RSP: 0018:ffffc90000b37910 EFLAGS: 00000293 > RAX: 0000000000000000 RBX: ffff8880b9544380 RCX: ffffffff8180f38b > RDX: ffff8880192f0000 RSI: ffffffff8180f365 RDI: 0000000000000005 > RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 > R10: 0000000000000001 R11: 0000000000000006 R12: ffffed10172a8871 > R13: 0000000000000001 R14: ffff8880b9544388 R15: ffff8880b943f840 > FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000055e176bb4000 CR3: 000000000d57a000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <IRQ> > </IRQ> > <TASK> > on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1023 > on_each_cpu include/linux/smp.h:71 [inline] > text_poke_sync arch/x86/kernel/alternative.c:2086 [inline] > text_poke_bp_batch+0x22b/0x760 arch/x86/kernel/alternative.c:2296 > text_poke_flush arch/x86/kernel/alternative.c:2487 [inline] > text_poke_flush arch/x86/kernel/alternative.c:2484 [inline] > text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2494 > arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 > jump_label_update+0x1d7/0x400 kernel/jump_label.c:829 > static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:205 > static_key_enable+0x1a/0x20 kernel/jump_label.c:218 > toggle_allocation_gate mm/kfence/core.c:826 [inline] > toggle_allocation_gate+0xf8/0x250 mm/kfence/core.c:818 > process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 > process_scheduled_works kernel/workqueue.c:3335 [inline] > worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 > kthread+0x2c1/0x3a0 kernel/kthread.c:388 > ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 > </TASK> > watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [kworker/u8:3:43] > Modules linked in: > irq event stamp: 519008 > hardirqs last enabled at (519007): [<ffffffff8ad251cb>] irqentry_exit+0x3b/0x90 kernel/entry/common.c:351 > hardirqs last disabled at (519008): [<ffffffff8ad239ae>] sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1043 > softirqs last enabled at (519006): [<ffffffff8ad63156>] softirq_handle_end kernel/softirq.c:400 [inline] > softirqs last enabled at (519006): [<ffffffff8ad63156>] __do_softirq+0x596/0x8de kernel/softirq.c:583 > softirqs last disabled at (518991): [<ffffffff8151a149>] invoke_softirq kernel/softirq.c:428 [inline] > softirqs last disabled at (518991): [<ffffffff8151a149>] __irq_exit_rcu kernel/softirq.c:633 [inline] > softirqs last disabled at (518991): [<ffffffff8151a149>] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 > CPU: 0 PID: 43 Comm: kworker/u8:3 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 > Workqueue: events_unbound toggle_allocation_gate > RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] > RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] > RIP: 0010:write_comp_data+0x11/0x90 kernel/kcov.c:236 > Code: cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 49 89 d2 49 89 f8 49 89 f1 65 48 8b 15 df e1 76 7e <65> 8b 05 e0 e1 76 7e a9 00 01 ff 00 74 0f f6 c4 01 74 59 8b 82 14 > RSP: 0018:ffffc90000b37908 EFLAGS: 00000202 > RAX: 0000000000000001 RBX: ffff8880b9544380 RCX: ffffffff8180f38b > RDX: ffff8880192f0000 RSI: 0000000000000000 RDI: 0000000000000005 > RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 > R10: 0000000000000001 R11: 0000000000000006 R12: ffffed10172a8871 > R13: 0000000000000001 R14: ffff8880b9544388 R15: ffff8880b943f840 > FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000055e176bb4000 CR3: 000000000d57a000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <IRQ> > </IRQ> > <TASK> > csd_lock_wait kernel/smp.c:311 [inline] > smp_call_function_many_cond+0x50b/0x1590 kernel/smp.c:855 > on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1023 > on_each_cpu include/linux/smp.h:71 [inline] > text_poke_sync arch/x86/kernel/alternative.c:2086 [inline] > text_poke_bp_batch+0x22b/0x760 arch/x86/kernel/alternative.c:2296 > text_poke_flush arch/x86/kernel/alternative.c:2487 [inline] > text_poke_flush arch/x86/kernel/alternative.c:2484 [inline] > text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2494 > arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 > jump_label_update+0x1d7/0x400 kernel/jump_label.c:829 > static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:205 > static_key_enable+0x1a/0x20 kernel/jump_label.c:218 > toggle_allocation_gate mm/kfence/core.c:826 [inline] > toggle_allocation_gate+0xf8/0x250 mm/kfence/core.c:818 > process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 > process_scheduled_works kernel/workqueue.c:3335 [inline] > worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 > kthread+0x2c1/0x3a0 kernel/kthread.c:388 > ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 > </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. > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want syzbot to run the reproducer, reply with: > #syz test: git://repo/address.git branch-or-commit-hash > If you attach or paste a git patch, syzbot will apply it before testing. > > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup -- paul-moore.com
