ci starts bisection 2023-04-03 14:55:46.395944788 +0000 UTC m=+33296.718687325 bisecting fixing commit since 72a85e2b0a1e1e6fb4ee51ae902730212b2de25c building syzkaller on 9da18ae8fa827d046ef8da48cc23c97418553c23 ensuring issue is reproducible on original commit 72a85e2b0a1e1e6fb4ee51ae902730212b2de25c testing commit 72a85e2b0a1e1e6fb4ee51ae902730212b2de25c gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: c5a9585b75b92f605c4f69feef55aba82367c0c805c3bd377707df48a158a944 run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in corrupted 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: KASAN: use-after-free Read in net_tx_action run #8: crashed: INFO: rcu detected stall in tc_modify_qdisc run #9: crashed: KASAN: use-after-free Read in net_tx_action run #10: crashed: KASAN: use-after-free Read in net_tx_action run #11: crashed: KASAN: use-after-free Read in net_tx_action run #12: crashed: KASAN: use-after-free Read in net_tx_action run #13: crashed: KASAN: use-after-free Read in net_tx_action run #14: crashed: KASAN: use-after-free Read in net_tx_action run #15: crashed: INFO: rcu detected stall in sys_exit_group run #16: crashed: INFO: rcu detected stall in corrupted run #17: crashed: INFO: rcu detected stall in gc_worker run #18: crashed: INFO: rcu detected stall in do_mas_munmap run #19: crashed: KASAN: use-after-free Read in net_tx_action testing current HEAD 7e364e56293bb98cae1b55fd835f5991c4e96e7d testing commit 7e364e56293bb98cae1b55fd835f5991c4e96e7d gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: db903357cb4e6a8f686f54da667712a852ced51e30393eca2959fe047511637a run #0: crashed: INFO: rcu detected stall in sys_socket run #1: crashed: INFO: rcu detected stall in sys_chdir run #2: crashed: INFO: rcu detected stall in sys_openat run #3: crashed: INFO: rcu detected stall in do_vmi_munmap run #4: crashed: INFO: rcu detected stall in sys_openat run #5: crashed: INFO: rcu detected stall in do_vmi_munmap run #6: crashed: INFO: rcu detected stall in gc_worker run #7: crashed: INFO: rcu detected stall in gc_worker run #8: crashed: INFO: rcu detected stall in sys_execve run #9: OK revisions tested: 2, total time: 37m30.366962556s (build: 19m12.090073691s, test: 17m38.479334566s) the crash still happens on HEAD commit msg: Linux 6.3-rc5 crash: INFO: rcu detected stall in sys_execve rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-...!: (1 GPs behind) idle=8f74/1/0x4000000000000000 softirq=30569/30570 fqs=5 rcu: (detected by 0, t=10503 jiffies, g=18493, q=160 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 13485 Comm: rm Not tainted 6.3.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:lock_acquire+0x225/0x520 kernel/locking/lockdep.c:5673 Code: 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 a8 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 a8 02 00 00 48 81 c4 b0 00 00 00 5b 5d <41> 5c 41 5d 41 5e 41 5f c3 65 8b 05 eb 3d a7 7e 85 c0 75 b0 65 8b RSP: 0018:ffffc900003e8d10 EFLAGS: 00000086 RAX: 0000000000000000 RBX: 000000000009f8a0 RCX: ffffffff815af2bc RDX: 1ffff1100e66654e RSI: ffffffff896b8a80 RDI: ffffffff89c218a0 RBP: ffffffff90e896a8 R08: 0000000000000000 R09: ffffffff90383b87 R10: fffffbfff2070770 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff90e896c0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd518ede90 CR3: 000000007b757000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162 debug_object_deactivate lib/debugobjects.c:739 [inline] debug_object_deactivate+0x105/0x300 lib/debugobjects.c:727 debug_hrtimer_deactivate kernel/time/hrtimer.c:425 [inline] debug_deactivate kernel/time/hrtimer.c:481 [inline] __run_hrtimer kernel/time/hrtimer.c:1653 [inline] __hrtimer_run_queues+0x337/0x960 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x2f9/0x7a0 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline] __sysvec_apic_timer_interrupt+0x14a/0x430 arch/x86/kernel/apic/apic.c:1113 sysvec_apic_timer_interrupt+0x92/0xc0 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:__seqprop_spinlock_sequence include/linux/seqlock.h:275 [inline] RIP: 0010:read_seqbegin include/linux/seqlock.h:836 [inline] RIP: 0010:zone_span_seqbegin include/linux/memory_hotplug.h:132 [inline] RIP: 0010:page_outside_zone_boundaries mm/page_alloc.c:629 [inline] RIP: 0010:bad_range+0xd3/0x3e0 mm/page_alloc.c:656 Code: 24 70 4c 89 ff e8 ed cf ab ff 58 48 b8 00 00 00 00 00 fc ff df 9c 5a 80 e6 02 0f 85 0c 02 00 00 4d 85 ed 74 01 fb 0f b6 55 00 <84> d2 74 09 80 fa 03 0f 8e 1a 02 00 00 44 8b ab c0 00 00 00 41 f6 RSP: 0018:ffffc9000359f4c0 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: ffff88813fffa700 RCX: 1ffffffff2072e56 RDX: 0000000000000000 RSI: ffffffff896b8880 RDI: ffffffff89c218a0 RBP: ffffed1027fff4f8 R08: 0000000000000001 R09: ffffffff90383bb7 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000200 R14: ffffed1027fff4f0 R15: ffff88813fffa7c8 rmqueue mm/page_alloc.c:3884 [inline] get_page_from_freelist+0x1170/0x2e20 mm/page_alloc.c:4323 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:5592 __folio_alloc+0x16/0x40 mm/page_alloc.c:5624 vma_alloc_folio+0x11a/0x690 mm/mempolicy.c:2244 do_anonymous_page mm/memory.c:4052 [inline] handle_pte_fault mm/memory.c:4907 [inline] __handle_mm_fault+0x107b/0x2ee0 mm/memory.c:5051 handle_mm_fault+0x17b/0x640 mm/memory.c:5197 do_user_addr_fault+0x2da/0xd00 arch/x86/mm/fault.c:1407 handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x5e/0xc0 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:__put_user_8+0x16/0x20 arch/x86/lib/putuser.S:117 Code: 01 31 c9 0f 01 ca c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 48 bb f9 ef ff ff ff 7f 00 00 48 39 d9 73 30 0f 01 cb <48> 89 01 31 c9 0f 01 ca c3 90 f3 0f 1e fa f3 0f 1e fa 0f 01 cb 48 RSP: 0018:ffffc9000359fb98 EFLAGS: 00050293 RAX: 0000000000000003 RBX: 00007fffffffeff9 RCX: 00007ffd518ede90 RDX: 1ffff1100e66654d RSI: ffffffff896b8a80 RDI: ffffffff89c218a0 RBP: ffff888026d9cdc0 R08: 0000000000000001 R09: ffffffff8d647797 R10: fffffbfff1ac8ef2 R11: 00000000cd245de9 R12: ffff888026d9cee8 R13: 00007f366ebe5050 R14: ffff88806a973000 R15: ffff88806a973018 create_elf_tables fs/binfmt_elf.c:331 [inline] load_elf_binary+0x24c6/0x4430 fs/binfmt_elf.c:1291 search_binary_handler fs/exec.c:1736 [inline] exec_binprm fs/exec.c:1778 [inline] bprm_execve fs/exec.c:1853 [inline] bprm_execve+0x677/0x14f0 fs/exec.c:1809 do_execveat_common+0x602/0x800 fs/exec.c:1960 do_execve fs/exec.c:2034 [inline] __do_sys_execve fs/exec.c:2110 [inline] __se_sys_execve fs/exec.c:2105 [inline] __x64_sys_execve+0x8e/0xc0 fs/exec.c:2105 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f37b9513337 Code: Unable to access opcode bytes at 0x7f37b951330d. RSP: 002b:00007ffed16bb138 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 000055dd83158bc8 RCX: 00007f37b9513337 RDX: 000055dd83158c28 RSI: 000055dd83158bc8 RDI: 000055dd83158cb0 RBP: 000055dd83158cb0 R08: 000055dd83158cb5 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 000055dd83158c28 R13: 00007f37b96b8ff4 R14: 000055dd83158c28 R15: 0000000000000000 rcu: rcu_preempt kthread starved for 10478 jiffies! g18493 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:28784 pid:15 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5307 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6625 schedule+0xde/0x1a0 kernel/sched/core.c:6701 schedule_timeout+0x121/0x270 kernel/time/timer.c:2167 rcu_gp_fqs_loop+0x190/0x910 kernel/rcu/tree.c:1608 rcu_gp_kthread+0x23a/0x360 kernel/rcu/tree.c:1807 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 rcu: Stack dump where RCU GP kthread last ran: CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 6.3.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:413 [inline] RIP: 0010:smp_call_function_many_cond+0x46e/0xf20 kernel/smp.c:987 Code: c8 7c 08 84 c9 0f 85 6f 08 00 00 41 8b 47 08 a8 01 74 30 49 89 d6 49 89 d5 49 c1 ee 03 41 83 e5 07 49 01 ee 41 83 c5 03 f3 90 <41> 0f b6 06 41 38 c5 7c 08 84 c0 0f 85 cd 07 00 00 41 8b 47 08 a8 RSP: 0018:ffffc900002ef9b0 EFLAGS: 00000202 RAX: 0000000000000011 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff8880b9b41fa8 RSI: ffffffff896b8880 RDI: ffffffff8b1ac9c8 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff90383b87 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b9a3d400 R13: 0000000000000003 R14: ffffed10173683f5 R15: ffff8880b9b41fa0 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f37b95c69ee CR3: 000000000b56c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_each_cpu_cond_mask+0x43/0x70 kernel/smp.c:1155 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1770 [inline] text_poke_bp_batch+0x423/0x770 arch/x86/kernel/alternative.c:2032 text_poke_flush arch/x86/kernel/alternative.c:2161 [inline] text_poke_flush arch/x86/kernel/alternative.c:2158 [inline] text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2168 arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x163/0x220 kernel/jump_label.c:205 static_key_enable+0x15/0x20 kernel/jump_label.c:218 toggle_allocation_gate mm/kfence/core.c:803 [inline] toggle_allocation_gate+0xdb/0x1e0 mm/kfence/core.c:795 process_one_work+0x865/0x1400 kernel/workqueue.c:2390 worker_thread+0x59c/0xec0 kernel/workqueue.c:2537 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308