======================================================== WARNING: possible irq lock inversion dependency detected 6.9.0-rc1-syzkaller-00009-g7033999ecd7b #0 Not tainted -------------------------------------------------------- syz-executor.0/15964 just changed the state of lock: ffff8880271e48a8 (&pipe->rd_wait){+.+.}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline] ffff8880271e48a8 (&pipe->rd_wait){+.+.}-{2:2}, at: pipe_resize_ring+0x5d/0x4b0 fs/pipe.c:1275 but this lock was taken by another, SOFTIRQ-safe lock in the past: (&ctx->ctx_lock){..-.}-{2:2} and interrupts could create inverse lock ordering between them. other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&pipe->rd_wait); local_irq_disable(); lock(&ctx->ctx_lock); lock(&pipe->rd_wait); lock(&ctx->ctx_lock); *** DEADLOCK *** 3 locks held by syz-executor.0/15964: #0: ffff8880271e4868 (&pipe->mutex){+.+.}-{3:3}, at: pipe_fcntl+0x98/0x510 fs/pipe.c:1405 #1: ffff8880271e48a8 (&pipe->rd_wait){+.+.}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline] #1: ffff8880271e48a8 (&pipe->rd_wait){+.+.}-{2:2}, at: pipe_resize_ring+0x5d/0x4b0 fs/pipe.c:1275 #2: ffffffff8d7b4b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #2: ffffffff8d7b4b60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #2: ffffffff8d7b4b60 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline] #2: ffffffff8d7b4b60 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0xe4/0x420 kernel/trace/bpf_trace.c:2420 the shortest dependencies between 2nd lock and 1st lock: -> (&ctx->ctx_lock){..-.}-{2:2} { IN-SOFTIRQ-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170 spin_lock_irq include/linux/spinlock.h:376 [inline] free_ioctx_users+0x37/0x240 fs/aio.c:658 percpu_ref_put_many.constprop.0+0x269/0x2a0 include/linux/percpu-refcount.h:335 rcu_do_batch kernel/rcu/tree.c:2196 [inline] rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2471 __do_softirq+0x218/0x922 kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:633 [inline] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 get_current arch/x86/include/asm/current.h:49 [inline] __sanitizer_cov_trace_pc+0xc/0x60 kernel/kcov.c:206 _compound_head include/linux/page-flags.h:247 [inline] PageSlab include/linux/page-flags.h:507 [inline] page_table_check_clear.part.0+0xc6/0x7f0 mm/page_table_check.c:74 page_table_check_clear mm/page_table_check.c:68 [inline] __page_table_check_pte_clear+0x31c/0x570 mm/page_table_check.c:158 page_table_check_pte_clear include/linux/page_table_check.h:49 [inline] ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1295 [inline] get_and_clear_full_ptes include/linux/pgtable.h:634 [inline] zap_present_folio_ptes mm/memory.c:1479 [inline] zap_present_ptes mm/memory.c:1561 [inline] zap_pte_range mm/memory.c:1603 [inline] zap_pmd_range mm/memory.c:1720 [inline] zap_pud_range mm/memory.c:1749 [inline] zap_p4d_range mm/memory.c:1770 [inline] unmap_page_range+0x1efc/0x3be0 mm/memory.c:1791 unmap_single_vma+0x194/0x2b0 mm/memory.c:1837 unmap_vmas+0x22f/0x490 mm/memory.c:1881 exit_mmap+0x1c1/0xb90 mm/mmap.c:3267 __mmput+0x12a/0x4d0 kernel/fork.c:1345 mmput+0x62/0x70 kernel/fork.c:1367 exit_mm kernel/exit.c:569 [inline] do_exit+0x999/0x2c10 kernel/exit.c:865 do_group_exit+0xd3/0x2a0 kernel/exit.c:1027 __do_sys_exit_group kernel/exit.c:1038 [inline] __se_sys_exit_group kernel/exit.c:1036 [inline] __ia32_sys_exit_group+0x3e/0x50 kernel/exit.c:1036 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7a/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7a/0x84 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170 spin_lock_irq include/linux/spinlock.h:376 [inline] aio_poll fs/aio.c:1933 [inline] __io_submit_one fs/aio.c:2021 [inline] io_submit_one+0xc6b/0x1df0 fs/aio.c:2058 __do_compat_sys_io_submit fs/aio.c:2159 [inline] __se_compat_sys_io_submit fs/aio.c:2129 [inline] __ia32_compat_sys_io_submit+0x1af/0x390 fs/aio.c:2129 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7a/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7a/0x84 } ... key at: [] __key.19+0x0/0x40 ... acquired at: __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] poll_iocb_lock_wq+0x8b/0x240 fs/aio.c:1714 aio_poll fs/aio.c:1935 [inline] __io_submit_one fs/aio.c:2021 [inline] io_submit_one+0xc9d/0x1df0 fs/aio.c:2058 __do_compat_sys_io_submit fs/aio.c:2159 [inline] __se_compat_sys_io_submit fs/aio.c:2129 [inline] __ia32_compat_sys_io_submit+0x1af/0x390 fs/aio.c:2129 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7a/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7a/0x84 -> (&pipe->rd_wait){+.+.}-{2:2} { HARDIRQ-ON-W at: __trace_hardirqs_on_caller kernel/locking/lockdep.c:4292 [inline] lockdep_hardirqs_on_prepare+0x137/0x420 kernel/locking/lockdep.c:4359 trace_hardirqs_on+0x36/0x40 kernel/trace/trace_preemptirq.c:61 __local_bh_enable_ip+0xa4/0x120 kernel/softirq.c:387 spin_unlock_bh include/linux/spinlock.h:396 [inline] sock_hash_delete_elem+0x2b8/0x360 net/core/sock_map.c:947 bpf_prog_57115342e4867123+0x47/0x4b bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run2+0x151/0x420 kernel/trace/bpf_trace.c:2420 trace_kfree include/trace/events/kmem.h:94 [inline] kfree+0x225/0x390 mm/slub.c:4377 pipe_resize_ring+0x1ed/0x4b0 fs/pipe.c:1310 pipe_set_size fs/pipe.c:1370 [inline] pipe_fcntl+0x327/0x510 fs/pipe.c:1409 do_fcntl+0x22f/0x1330 fs/fcntl.c:426 do_compat_fcntl64+0x35d/0x6a0 fs/fcntl.c:676 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7a/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7a/0x84 SOFTIRQ-ON-W at: __trace_hardirqs_on_caller kernel/locking/lockdep.c:4300 [inline] lockdep_hardirqs_on_prepare+0x27a/0x420 kernel/locking/lockdep.c:4359 trace_hardirqs_on+0x36/0x40 kernel/trace/trace_preemptirq.c:61 __local_bh_enable_ip+0xa4/0x120 kernel/softirq.c:387 spin_unlock_bh include/linux/spinlock.h:396 [inline] sock_hash_delete_elem+0x2b8/0x360 net/core/sock_map.c:947 bpf_prog_57115342e4867123+0x47/0x4b bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run2+0x151/0x420 kernel/trace/bpf_trace.c:2420 trace_kfree include/trace/events/kmem.h:94 [inline] kfree+0x225/0x390 mm/slub.c:4377 pipe_resize_ring+0x1ed/0x4b0 fs/pipe.c:1310 pipe_set_size fs/pipe.c:1370 [inline] pipe_fcntl+0x327/0x510 fs/pipe.c:1409 do_fcntl+0x22f/0x1330 fs/fcntl.c:426 do_compat_fcntl64+0x35d/0x6a0 fs/fcntl.c:676 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7a/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7a/0x84 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 prepare_to_wait_event+0x1f/0x690 kernel/sched/wait.c:275 pipe_read+0xa3f/0x1400 fs/pipe.c:390 call_read_iter include/linux/fs.h:2102 [inline] new_sync_read fs/read_write.c:395 [inline] vfs_read+0x9fd/0xb80 fs/read_write.c:476 ksys_read+0x1f8/0x260 fs/read_write.c:619 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 } ... key at: [] __key.2+0x0/0x40 ... acquired at: mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4274 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4300 [inline] lockdep_hardirqs_on_prepare+0x27a/0x420 kernel/locking/lockdep.c:4359 trace_hardirqs_on+0x36/0x40 kernel/trace/trace_preemptirq.c:61 __local_bh_enable_ip+0xa4/0x120 kernel/softirq.c:387 spin_unlock_bh include/linux/spinlock.h:396 [inline] sock_hash_delete_elem+0x2b8/0x360 net/core/sock_map.c:947 bpf_prog_57115342e4867123+0x47/0x4b bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run2+0x151/0x420 kernel/trace/bpf_trace.c:2420 trace_kfree include/trace/events/kmem.h:94 [inline] kfree+0x225/0x390 mm/slub.c:4377 pipe_resize_ring+0x1ed/0x4b0 fs/pipe.c:1310 pipe_set_size fs/pipe.c:1370 [inline] pipe_fcntl+0x327/0x510 fs/pipe.c:1409 do_fcntl+0x22f/0x1330 fs/fcntl.c:426 do_compat_fcntl64+0x35d/0x6a0 fs/fcntl.c:676 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7a/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7a/0x84 stack backtrace: CPU: 1 PID: 15964 Comm: syz-executor.0 Not tainted 6.9.0-rc1-syzkaller-00009-g7033999ecd7b #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_irq_inversion_bug.part.0+0x3e9/0x5a0 kernel/locking/lockdep.c:4080 print_irq_inversion_bug kernel/locking/lockdep.c:4033 [inline] check_usage_forwards kernel/locking/lockdep.c:4111 [inline] mark_lock_irq kernel/locking/lockdep.c:4243 [inline] mark_lock+0x574/0xc60 kernel/locking/lockdep.c:4678 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4274 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4300 [inline] lockdep_hardirqs_on_prepare+0x27a/0x420 kernel/locking/lockdep.c:4359 trace_hardirqs_on+0x36/0x40 kernel/trace/trace_preemptirq.c:61 __local_bh_enable_ip+0xa4/0x120 kernel/softirq.c:387 spin_unlock_bh include/linux/spinlock.h:396 [inline] sock_hash_delete_elem+0x2b8/0x360 net/core/sock_map.c:947 bpf_prog_57115342e4867123+0x47/0x4b bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run2+0x151/0x420 kernel/trace/bpf_trace.c:2420 trace_kfree include/trace/events/kmem.h:94 [inline] kfree+0x225/0x390 mm/slub.c:4377 pipe_resize_ring+0x1ed/0x4b0 fs/pipe.c:1310 pipe_set_size fs/pipe.c:1370 [inline] pipe_fcntl+0x327/0x510 fs/pipe.c:1409 do_fcntl+0x22f/0x1330 fs/fcntl.c:426 do_compat_fcntl64+0x35d/0x6a0 fs/fcntl.c:676 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7a/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7a/0x84 RIP: 0023:0xf72e3579 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 b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5edd5ac EFLAGS: 00000292 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 0000000000000407 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi