ci starts bisection 2023-05-30 21:08:27.128397359 +0000 UTC m=+4281.925675666 bisecting fixing commit since a70385240892bcbc6442b054e847c74100e72f1a building syzkaller on 23bf86af9a2ba03cda2b5b913bafb76ce8ce14b8 ensuring issue is reproducible on original commit a70385240892bcbc6442b054e847c74100e72f1a testing commit a70385240892bcbc6442b054e847c74100e72f1a gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f3649fdf17c62feb4e7414224143fb1ccd88f69f1adea4d3e98bfce7a2e5fceb run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: failed to write control pipe: write |NUM: broken pipe run #1: basic kernel testing failed: BUG: program execution failed: executor NUM: exit status NUM run #2: basic kernel testing failed: BUG: program execution failed: executor NUM: exit status NUM run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in corrupted run #6: crashed: INFO: rcu detected stall in corrupted run #7: crashed: INFO: rcu detected stall in corrupted run #8: crashed: INFO: rcu detected stall in corrupted run #9: crashed: INFO: rcu detected stall in corrupted run #10: crashed: INFO: rcu detected stall in corrupted run #11: crashed: INFO: rcu detected stall in corrupted run #12: crashed: INFO: rcu detected stall in corrupted run #13: crashed: INFO: rcu detected stall in corrupted run #14: crashed: INFO: rcu detected stall in corrupted run #15: crashed: INFO: rcu detected stall in toggle_allocation_gate run #16: crashed: INFO: rcu detected stall in corrupted run #17: crashed: INFO: rcu detected stall in corrupted run #18: crashed: INFO: rcu detected stall in corrupted run #19: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode testing current HEAD 8b817fded42d8fe3a0eb47b1149d907851a3c942 testing commit 8b817fded42d8fe3a0eb47b1149d907851a3c942 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: fef11d91912c172da00b75f5336013780bb10aae9bdc648c50cdecd405d45924 run #0: crashed: INFO: rcu detected stall in sys_newfstatat run #1: crashed: INFO: rcu detected stall in sys_syslog run #2: crashed: INFO: rcu detected stall in sys_openat run #3: crashed: INFO: rcu detected stall in sys_readlink run #4: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #5: crashed: INFO: rcu detected stall in sys_futex run #6: crashed: INFO: rcu detected stall in batadv_iv_send_outstanding_bat_ogm_packet run #7: crashed: INFO: rcu detected stall in security_file_open run #8: crashed: INFO: rcu detected stall in hub_event run #9: crashed: INFO: rcu detected stall in gc_worker crash still not fixed/happens on the oldest tested release revisions tested: 2, total time: 32m50.577089892s (build: 15m39.284072476s, test: 16m24.181241634s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Merge tag 'trace-v6.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace crash: INFO: rcu detected stall in gc_worker imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5382/1:b..l rcu: (detected by 0, t=10502 jiffies, g=26985, q=701 ncpus=2) task:kworker/0:8 state:R running task stack:21176 pid:5382 ppid:2 flags:0x00004000 Workqueue: events_power_efficient gc_worker Call Trace: __schedule+0x1859/0x48c0 preempt_schedule_irq+0xfb/0x1b0 irqentry_exit+0x57/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:seqcount_lockdep_reader_access+0x184/0x1d0 Code: 24 20 42 80 3c 3b 00 74 08 4c 89 e7 e8 95 1a 10 fa f6 44 24 21 02 75 47 41 f7 c6 00 02 00 00 74 01 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 2f 00 00 00 00 66 43 c7 44 2f 09 00 00 43 c6 44 2f 0b 00 RSP: 0018:ffffc90004cd7a40 EFLAGS: 00000206 RAX: 70bcd1a39f0f4700 RBX: 1ffff9200099af4c RCX: ffffffff815e962a RDX: dffffc0000000000 RSI: ffffffff898a4aa0 RDI: ffffffff89d99a40 RBP: ffffc90004cd7af0 R08: dffffc0000000000 R09: fffffbfff1d1fa2a R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90004cd7a60 R13: 1ffff9200099af48 R14: 0000000000000246 R15: dffffc0000000000 gc_worker+0x298/0x10c0 process_one_work+0x797/0xe20 worker_thread+0x8c9/0xfd0 kthread+0x276/0x2f0 ret_from_fork+0x1f/0x30 rcu: rcu_preempt kthread starved for 10468 jiffies! g26985 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 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:25760 pid:16 ppid:2 flags:0x00004000 Call Trace: __schedule+0x1859/0x48c0 schedule+0xc3/0x180 schedule_timeout+0x19e/0x2d0 rcu_gp_fqs_loop+0x2c6/0x1010 rcu_gp_kthread+0xa7/0x3b0 kthread+0x276/0x2f0 ret_from_fork+0x1f/0x30 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 898 Comm: kworker/1:2 Not tainted 6.4.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Workqueue: usb_hub_wq hub_event RIP: 0010:__pv_queued_spin_lock_slowpath+0x603/0xc50 Code: 89 dd c6 03 00 48 8b 44 24 10 0f b6 04 10 84 c0 0f 85 44 01 00 00 48 8b 04 24 c6 00 01 bb 00 80 ff ff eb 06 f3 90 ff c3 74 5d <41> 0f b6 04 14 84 c0 75 36 41 80 3f 00 75 eb 4c 89 ff be 02 00 00 RSP: 0018:ffffc900049d68e0 EFLAGS: 00000282 RAX: 0000000000000000 RBX: 00000000fffffb85 RCX: ffffffff815e962a RDX: dffffc0000000000 RSI: ffffffff898a4aa0 RDI: ffffffff89d99a40 RBP: ffffc900049d69d0 R08: dffffc0000000000 R09: fffffbfff1d1fa1d R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11028036e62 R13: ffff8880b9d3cf94 R14: 1ffff110173a0001 R15: ffff8881401b7310 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fda58456110 CR3: 0000000075535000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_raw_spin_lock+0x297/0x3a0 class_to_subsys+0x3d/0xf0 get_device_parent+0x40/0x3a0 device_add+0x2d2/0xc50 rc_register_device+0x2f7/0x14d0 imon_probe+0x218b/0x2dd0 usb_probe_interface+0x49f/0x9b0 really_probe+0x250/0xa70 __driver_probe_device+0x138/0x340 driver_probe_device+0x4b/0x3a0 __device_attach_driver+0x2cd/0x3f0 bus_for_each_drv+0x212/0x280 __device_attach+0x255/0x450 bus_probe_device+0x12a/0x200 device_add+0x74b/0xc50 usb_set_configuration+0x156f/0x1b40 usb_generic_driver_probe+0x65/0xf0 usb_probe_device+0xc7/0x1f0 really_probe+0x250/0xa70 __driver_probe_device+0x138/0x340 driver_probe_device+0x4b/0x3a0 __device_attach_driver+0x2cd/0x3f0 bus_for_each_drv+0x212/0x280 __device_attach+0x255/0x450 bus_probe_device+0x12a/0x200 device_add+0x74b/0xc50 usb_new_device+0xab6/0x1820 hub_event+0x2627/0x45e0 process_one_work+0x797/0xe20 worker_thread+0x8c9/0xfd0 kthread+0x276/0x2f0 ret_from_fork+0x1f/0x30 imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 6-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 3-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored