[ 16.962312][ C2] [ 16.962477][ C2] ================================ [ 16.962716][ C2] WARNING: inconsistent lock state [ 16.962953][ C2] 6.15.0-virtme #1 Not tainted [ 16.963195][ C2] -------------------------------- [ 16.963431][ C2] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 16.963722][ C2] unshare/257 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 16.964018][ C2] ffffffffa6b8d218 (&xa->xa_lock#8){+.?.}-{3:3}, at: xa_set_mark+0x73/0x120 [ 16.964441][ C2] {SOFTIRQ-ON-W} state was registered at: [ 16.964677][ C2] __lock_acquire+0x20b/0x7e0 [ 16.964921][ C2] lock_acquire.part.0+0xb6/0x240 [ 16.965160][ C2] _raw_spin_lock+0x33/0x40 [ 16.965396][ C2] xa_store+0x1c/0x50 [ 16.965577][ C2] ref_tracker_dir_debugfs+0x168/0x1b0 [ 16.965815][ C2] init_net_debugfs+0x15/0x70 [ 16.966060][ C2] do_one_initcall+0x8c/0x1e0 [ 16.966297][ C2] do_initcalls+0x176/0x280 [ 16.966534][ C2] kernel_init_freeable+0x22d/0x300 [ 16.966772][ C2] kernel_init+0x20/0x200 [ 16.967012][ C2] ret_from_fork+0x240/0x320 [ 16.967253][ C2] ret_from_fork_asm+0x1a/0x30 [ 16.967490][ C2] irq event stamp: 5348 [ 16.967670][ C2] hardirqs last enabled at (5348): [] _raw_spin_unlock_irqrestore+0x5d/0x80 [ 16.968200][ C2] hardirqs last disabled at (5347): [] _raw_spin_lock_irqsave+0x5b/0x60 [ 16.968621][ C2] softirqs last enabled at (4548): [] handle_softirqs+0x358/0x620 [ 16.969045][ C2] softirqs last disabled at (4793): [] __irq_exit_rcu+0xfa/0x160 [ 16.969477][ C2] [ 16.969477][ C2] other info that might help us debug this: [ 16.969833][ C2] Possible unsafe locking scenario: [ 16.969833][ C2] [ 16.970181][ C2] CPU0 [ 16.970360][ C2] ---- [ 16.970538][ C2] lock(&xa->xa_lock#8); [ 16.970725][ C2] [ 16.970902][ C2] lock(&xa->xa_lock#8); [ 16.971142][ C2] [ 16.971142][ C2] *** DEADLOCK *** [ 16.971142][ C2] [ 16.971494][ C2] 3 locks held by unshare/257: [ 16.971736][ C2] #0: ffff88800a3bc120 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x2b/0x530 [ 16.972169][ C2] #1: ffffffffa41794e0 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0x147/0x1e10 [ 16.972600][ C2] #2: ffffffffa41793c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch+0x2e4/0xf20 [ 16.973024][ C2] [ 16.973024][ C2] stack backtrace: [ 16.973319][ C2] CPU: 2 UID: 0 PID: 257 Comm: unshare Not tainted 6.15.0-virtme #1 PREEMPT(full) [ 16.973323][ C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.973325][ C2] Call Trace: [ 16.973327][ C2] [ 16.973329][ C2] dump_stack_lvl+0x82/0xd0 [ 16.973335][ C2] print_usage_bug.part.0+0x25f/0x360 [ 16.973340][ C2] mark_lock_irq+0x343/0x400 [ 16.973347][ C2] mark_lock+0x174/0x2f0 [ 16.973351][ C2] mark_usage+0x46/0x150 [ 16.973354][ C2] __lock_acquire+0x20b/0x7e0 [ 16.973358][ C2] ? unwind_next_frame+0x4f8/0x1e10 [ 16.973362][ C2] ? kmem_cache_alloc_noprof+0x1ab/0x330 [ 16.973366][ C2] lock_acquire.part.0+0xb6/0x240 [ 16.973369][ C2] ? xa_set_mark+0x73/0x120 [ 16.973373][ C2] ? rcu_is_watching+0x12/0xc0 [ 16.973378][ C2] ? lock_acquire+0x10c/0x170 [ 16.973382][ C2] ? xa_set_mark+0x73/0x120 [ 16.973385][ C2] _raw_spin_lock+0x33/0x40 [ 16.973388][ C2] ? xa_set_mark+0x73/0x120 [ 16.973391][ C2] xa_set_mark+0x73/0x120 [ 16.973393][ C2] ? __pfx_xa_set_mark+0x10/0x10 [ 16.973396][ C2] ? __lock_acquire+0x44d/0x7e0 [ 16.973401][ C2] ? find_held_lock+0x2b/0x80 [ 16.973405][ C2] ref_tracker_dir_exit+0xb2/0x740 [ 16.973410][ C2] ? mark_held_locks+0x49/0x80 [ 16.973413][ C2] ? _raw_spin_unlock_irqrestore+0x5d/0x80 [ 16.973417][ C2] ? __pfx_ref_tracker_dir_exit+0x10/0x10 [ 16.973421][ C2] ? ref_tracker_free+0x35d/0x900 [ 16.973424][ C2] ? __lock_acquire+0x44d/0x7e0 [ 16.973427][ C2] ? __pfx_ref_tracker_free+0x10/0x10 [ 16.973430][ C2] ? __sk_destruct+0x383/0x780 [ 16.973435][ C2] ? rcu_do_batch+0x34f/0xf20 [ 16.973438][ C2] ? rcu_core+0x2bb/0x500 [ 16.973440][ C2] ? handle_softirqs+0x21b/0x620 [ 16.973444][ C2] __put_net+0x83/0x140 [ 16.973449][ C2] ? ___slab_alloc+0xba4/0x1170 [ 16.973451][ C2] ? __pfx___put_net+0x10/0x10 [ 16.973456][ C2] ? bpf_sk_storage_free+0x9f/0x1c0 [ 16.973460][ C2] __sk_destruct+0x58a/0x780 [ 16.973464][ C2] ? rcu_do_batch+0x34a/0xf20 [ 16.973467][ C2] rcu_do_batch+0x34f/0xf20 [ 16.973470][ C2] ? find_held_lock+0x2b/0x80 [ 16.973474][ C2] ? __pfx_rcu_do_batch+0x10/0x10 [ 16.973477][ C2] ? mark_held_locks+0x49/0x80 [ 16.973481][ C2] ? note_gp_changes+0x182/0x1e0 [ 16.973484][ C2] ? lockdep_hardirqs_on+0x7c/0x110 [ 16.973489][ C2] rcu_core+0x2bb/0x500 [ 16.973492][ C2] handle_softirqs+0x21b/0x620 [ 16.973498][ C2] __irq_exit_rcu+0xfa/0x160 [ 16.973501][ C2] irq_exit_rcu+0xe/0x30 [ 16.973505][ C2] sysvec_apic_timer_interrupt+0xa8/0xc0 [ 16.973508][ C2] [ 16.973509][ C2] [ 16.973511][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 16.973515][ C2] RIP: 0010:unwind_next_frame+0x155d/0x1e10 [ 16.973519][ C2] Code: 08 00 00 83 e0 07 38 c1 0f 9e c2 84 c9 0f 95 c0 84 c2 0f 85 82 08 00 00 4d 0f bf 66 02 4c 03 64 24 68 ba 08 00 00 00 4c 89 ef <4c> 89 e6 e8 9b e8 ff ff 4d 8d 5d 40 84 c0 0f 84 12 ef ff ff 4c 89 [ 16.973522][ C2] RSP: 0018:ffffc900006d7370 EFLAGS: 00000283 [ 16.973525][ C2] RAX: 0000000000000000 RBX: 1ffff920000dae77 RCX: 0000000000000000 [ 16.973527][ C2] RDX: 0000000000000008 RSI: 0000000000000001 RDI: ffffc900006d7470 [ 16.973529][ C2] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffc900006d74b1 [ 16.973530][ C2] R10: 0000000000000000 R11: ffffc900006d74b0 R12: ffffc900006d7e98 [ 16.973532][ C2] R13: ffffc900006d7470 R14: ffffffffa50bbf76 R15: ffffc900006d7ea8 [ 16.973538][ C2] ? bprm_execve+0x1af/0x490 [ 16.973543][ C2] ? __pfx_unwind_next_frame+0x10/0x10 [ 16.973548][ C2] ? bprm_execve+0x1af/0x490 [ 16.973551][ C2] ? kernel_text_address+0x17/0xe0 [ 16.973555][ C2] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 16.973560][ C2] arch_stack_walk+0x8b/0xf0 [ 16.973565][ C2] ? do_execveat_common.isra.0+0x3f5/0x550 [ 16.973570][ C2] stack_trace_save+0x93/0xd0 [ 16.973573][ C2] ? __pfx_stack_trace_save+0x10/0x10 [ 16.973577][ C2] ? mark_held_locks+0x49/0x80 [ 16.973581][ C2] ? _raw_spin_unlock_irqrestore+0x5d/0x80 [ 16.973584][ C2] set_track_prepare+0x30/0x70 [ 16.973588][ C2] ? kmem_cache_alloc_noprof+0x1ab/0x330 [ 16.973590][ C2] ? __anon_vma_prepare+0x9a/0x3e0 [ 16.973595][ C2] ? __vmf_anon_prepare+0xec/0x1e0 [ 16.973598][ C2] ? do_pte_missing+0x3ac/0xe00 [ 16.973600][ C2] ? handle_pte_fault+0x3fc/0x700 [ 16.973603][ C2] ? __handle_mm_fault+0x3fc/0x5e0 [ 16.973605][ C2] ? handle_mm_fault+0x200/0x420 [ 16.973608][ C2] ? do_user_addr_fault+0x341/0xe00 [ 16.973611][ C2] ? exc_page_fault+0x5d/0xc0 [ 16.973614][ C2] ? asm_exc_page_fault+0x26/0x30 [ 16.973616][ C2] ? rep_stos_alternative+0x40/0x80 [ 16.973619][ C2] ? elf_load+0x498/0x700 [ 16.973623][ C2] ? load_elf_binary+0x9c2/0x2960 [ 16.973626][ C2] ? exec_binprm+0x258/0x640 [ 16.973629][ C2] ? bprm_execve+0x1af/0x490 [ 16.973632][ C2] ___slab_alloc+0xba4/0x1170 [ 16.973635][ C2] ? __anon_vma_prepare+0x9a/0x3e0 [ 16.973640][ C2] ? __anon_vma_prepare+0x9a/0x3e0 [ 16.973643][ C2] __slab_alloc.constprop.0+0x5b/0xb0 [ 16.973647][ C2] ? __anon_vma_prepare+0x9a/0x3e0 [ 16.973649][ C2] kmem_cache_alloc_noprof+0x1ab/0x330 [ 16.973654][ C2] __anon_vma_prepare+0x9a/0x3e0 [ 16.973658][ C2] __vmf_anon_prepare+0xec/0x1e0 [ 16.973662][ C2] do_pte_missing+0x3ac/0xe00 [ 16.973665][ C2] handle_pte_fault+0x3fc/0x700 [ 16.973668][ C2] ? __pmd_alloc+0x312/0x7f0 [ 16.973671][ C2] ? __lock_release+0x5d/0x170 [ 16.973675][ C2] ? __pfx_handle_pte_fault+0x10/0x10 [ 16.973678][ C2] ? do_raw_spin_unlock+0x58/0x220 [ 16.973681][ C2] ? _raw_spin_unlock+0x2d/0x50 [ 16.973686][ C2] __handle_mm_fault+0x3fc/0x5e0 [ 16.973689][ C2] ? __pfx___handle_mm_fault+0x10/0x10 [ 16.973691][ C2] ? mt_find+0x2bc/0x3c0 [ 16.973700][ C2] handle_mm_fault+0x200/0x420 [ 16.973703][ C2] ? __pfx_handle_mm_fault+0x10/0x10 [ 16.973707][ C2] ? down_read_trylock+0x4b/0x60 [ 16.973713][ C2] do_user_addr_fault+0x341/0xe00 [ 16.973718][ C2] exc_page_fault+0x5d/0xc0 [ 16.973722][ C2] asm_exc_page_fault+0x26/0x30 [ 16.973725][ C2] RIP: 0010:rep_stos_alternative+0x40/0x80 [ 16.973727][ C2] Code: c9 75 f6 e9 02 65 03 00 48 89 07 48 83 c7 08 83 e9 08 74 ef 83 f9 08 73 ef eb de 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <48> 89 07 48 89 47 08 48 89 47 10 48 89 47 18 48 89 47 20 48 89 47 [ 16.973729][ C2] RSP: 0018:ffffc900006d7bd8 EFLAGS: 00050202 [ 16.973731][ C2] RAX: 0000000000000000 RBX: ffff888002bc9d18 RCX: 0000000000000f08 [ 16.973733][ C2] RDX: 0000000000000000 RSI: ffffffffa3c8de21 RDI: 000055e6a55d70f8 [ 16.973735][ C2] RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000001 [ 16.973736][ C2] R10: 0000000000000000 R11: ffff88800a3bc120 R12: 000055e6a55d70f8 [ 16.973737][ C2] R13: 0000000000000f08 R14: 000055e6a55d7150 R15: ffff888002bc9d38 [ 16.973743][ C2] elf_load+0x498/0x700 [ 16.973748][ C2] load_elf_binary+0x9c2/0x2960 [ 16.973755][ C2] ? find_held_lock+0x2b/0x80 [ 16.973758][ C2] ? __pfx_load_elf_binary+0x10/0x10 [ 16.973761][ C2] ? exec_binprm+0x237/0x640 [ 16.973767][ C2] exec_binprm+0x258/0x640 [ 16.973772][ C2] ? __pfx_exec_binprm+0x10/0x10 [ 16.973775][ C2] ? bprm_execve+0x93/0x490 [ 16.973780][ C2] bprm_execve+0x1af/0x490 [ 16.973784][ C2] do_execveat_common.isra.0+0x3f5/0x550 [ 16.973789][ C2] __x64_sys_execve+0x8e/0xb0 [ 16.973793][ C2] do_syscall_64+0xc1/0x380 [ 16.973796][ C2] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.973798][ C2] RIP: 0033:0x7f7e98abb40b [ 16.973805][ C2] Code: Unable to access opcode bytes at 0x7f7e98abb3e1. [ 16.973807][ C2] RSP: 002b:00007fffe4d79bd8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b [ 16.973809][ C2] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7e98abb40b [ 16.973811][ C2] RDX: 00005585dadeb6c0 RSI: 00005585dade9570 RDI: 00005585dae0d700 [ 16.973812][ C2] RBP: 00005585dae0d700 R08: 00005585dadeaf70 R09: 0000000000000020 [ 16.973814][ C2] R10: 00000000000001b6 R11: 0000000000000246 R12: 00000000ffffffff [ 16.973815][ C2] R13: 00005585dade9570 R14: 00005585dadeb6c0 R15: 00005585dadda660 [ 16.973821][ C2] [ 19.547456][ T257] packetdrill (257) used greatest stack depth: 24568 bytes left