===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 6.1.84-syzkaller #0 Not tainted ----------------------------------------------------- syz-executor.2/11718 [HC0[0]:SC0[2]:HE0:SE0] is trying to acquire: ffff888022829020 (&htab->buckets[i].lock){+...}-{2:2}, at: sock_hash_delete_elem+0xac/0x2f0 net/core/sock_map.c:932 and this task is already holding: ffff8880b983a620 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x58c/0xf90 which would create a new lock dependency: (&pool->lock){-.-.}-{2:2} -> ( &htab->buckets[i].lock){+...}-{2:2} but this new dependency connects a HARDIRQ-irq-safe lock: (&pool->lock ){-.-.}-{2:2} ... which became HARDIRQ-irq-safe at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 __queue_work+0x58c/0xf90 queue_work_on+0x14b/0x250 kernel/workqueue.c:1548 hrtimer_switch_to_hres kernel/time/hrtimer.c:747 [inline] hrtimer_run_queues+0x14b/0x450 kernel/time/hrtimer.c:1912 run_local_timers kernel/time/timer.c:1845 [inline] update_process_times+0x7b/0x1b0 kernel/time/timer.c:1868 tick_periodic+0x197/0x210 kernel/time/tick-common.c:100 tick_handle_periodic+0x46/0x150 kernel/time/tick-common.c:112 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline] __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 __sanitizer_cov_trace_switch+0x50/0xe0 update_event_printk kernel/trace/trace_events.c:2616 [inline] trace_event_eval_update+0x319/0xfc0 kernel/trace/trace_events.c:2788 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:307 to a HARDIRQ-irq-unsafe lock: (&htab->buckets[i].lock){+...}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178 sock_hash_delete_elem+0xac/0x2f0 net/core/sock_map.c:932 0xffffffffa000081a bpf_dispatcher_nop_func include/linux/bpf.h:989 [inline] __bpf_prog_run include/linux/filter.h:603 [inline] bpf_prog_run include/linux/filter.h:610 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2273 [inline] bpf_trace_run3+0x231/0x440 kernel/trace/bpf_trace.c:2313 __bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:114 trace_kmem_cache_free include/trace/events/kmem.h:114 [inline] kmem_cache_free+0x418/0x510 mm/slub.c:3682 user_path_at_empty+0x48/0x60 fs/namei.c:2909 user_path_at include/linux/namei.h:57 [inline] do_fchmodat fs/open.c:643 [inline] __do_sys_fchmodat fs/open.c:658 [inline] __se_sys_fchmodat fs/open.c:655 [inline] __x64_sys_fchmodat+0xfd/0x1a0 fs/open.c:655 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&htab->buckets[i].lock ); local_irq_disable(); lock(&pool->lock ); lock( &htab->buckets[i].lock ); lock( &pool->lock ); *** DEADLOCK *** 8 locks held by syz-executor.2/11718: #0: ffff8880279c6fe8 (&f->f_pos_lock ){+.+.}-{3:3} , at: __fdget_pos+0x2ba/0x360 fs/file.c:1062 #1: ffff88807e5a0460 (sb_writers #4){.+.+}-{0:0} , at: vfs_write+0x269/0xba0 fs/read_write.c:580 #2: ffff8880501b4030 (&sb->s_type->i_mutex_key #8 ){++++}-{3:3} , at: inode_lock include/linux/fs.h:758 [inline] , at: ext4_dio_write_iter fs/ext4/file.c:495 [inline] , at: ext4_file_write_iter+0x5cc/0x1880 fs/ext4/file.c:677 #3: ffff8880501b41d0 (mapping.invalidate_lock ){++++}-{3:3} , at: filemap_invalidate_lock include/linux/fs.h:803 [inline] , at: ext4_truncate_failed_write fs/ext4/truncate.h:20 [inline] , at: ext4_inode_extension_cleanup+0x18f/0x2e0 fs/ext4/file.c:331 #4: ffff88807e5a4990 (jbd2_handle ){++++}-{0:0} , at: start_this_handle+0x1f51/0x21b0 fs/jbd2/transaction.c:463 #5: ffffffff8d12a980 (rcu_read_lock ){....}-{1:2} , at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] , at: rcu_read_lock include/linux/rcupdate.h:791 [inline] , at: __queue_work+0xe5/0xf90 kernel/workqueue.c:1443 #6: ffff8880b983a620 (&pool->lock ){-.-.}-{2:2} , at: __queue_work+0x58c/0xf90 #7: ffffffff8d12a980 (rcu_read_lock ){....}-{1:2} , at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] , at: rcu_read_lock include/linux/rcupdate.h:791 [inline] , at: __bpf_trace_run kernel/trace/bpf_trace.c:2272 [inline] , at: bpf_trace_run1+0xec/0x3d0 kernel/trace/bpf_trace.c:2311 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> ( &pool->lock){-.-.}-{2:2} { IN-HARDIRQ-W at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 __queue_work+0x58c/0xf90 queue_work_on+0x14b/0x250 kernel/workqueue.c:1548 hrtimer_switch_to_hres kernel/time/hrtimer.c:747 [inline] hrtimer_run_queues+0x14b/0x450 kernel/time/hrtimer.c:1912 run_local_timers kernel/time/timer.c:1845 [inline] update_process_times+0x7b/0x1b0 kernel/time/timer.c:1868 tick_periodic+0x197/0x210 kernel/time/tick-common.c:100 tick_handle_periodic+0x46/0x150 kernel/time/tick-common.c:112 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline] __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 __sanitizer_cov_trace_switch+0x50/0xe0 update_event_printk kernel/trace/trace_events.c:2616 [inline] trace_event_eval_update+0x319/0xfc0 kernel/trace/trace_events.c:2788 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:307 IN-SOFTIRQ-W at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 __queue_work+0x58c/0xf90 call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504 expire_timers kernel/time/timer.c:1544 [inline] __run_timers+0x6a8/0x890 kernel/time/timer.c:1820 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833 __do_softirq+0x2e9/0xa4c kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] default_idle+0xb/0x10 arch/x86/kernel/process.c:730 default_idle_call+0x84/0xc0 kernel/sched/idle.c:109 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x251/0x680 kernel/sched/idle.c:303 cpu_startup_entry+0x3d/0x60 kernel/sched/idle.c:401 rest_init+0x2da/0x300 init/main.c:732 start_kernel+0x0/0x53f init/main.c:892 start_kernel+0x496/0x53f init/main.c:1139 secondary_startup_64_no_verify+0xcf/0xdb INITIAL USE at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 pwq_adjust_max_active+0x14e/0x550 kernel/workqueue.c:3765 link_pwq kernel/workqueue.c:3831 [inline] alloc_and_link_pwqs kernel/workqueue.c:4227 [inline] alloc_workqueue+0xbf8/0x1440 kernel/workqueue.c:4349 workqueue_init_early+0x71a/0x927 kernel/workqueue.c:6055 start_kernel+0x208/0x53f init/main.c:1030 secondary_startup_64_no_verify+0xcf/0xdb } ... key at: [] init_worker_pool.__key+0x0/0x20 the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (&htab->buckets[i].lock ){+...}-{2:2} { HARDIRQ-ON-W at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178 sock_hash_delete_elem+0xac/0x2f0 net/core/sock_map.c:932 0xffffffffa000081a bpf_dispatcher_nop_func include/linux/bpf.h:989 [inline] __bpf_prog_run include/linux/filter.h:603 [inline] bpf_prog_run include/linux/filter.h:610 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2273 [inline] bpf_trace_run3+0x231/0x440 kernel/trace/bpf_trace.c:2313 __bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:114 trace_kmem_cache_free include/trace/events/kmem.h:114 [inline] kmem_cache_free+0x418/0x510 mm/slub.c:3682 user_path_at_empty+0x48/0x60 fs/namei.c:2909 user_path_at include/linux/namei.h:57 [inline] do_fchmodat fs/open.c:643 [inline] __do_sys_fchmodat fs/open.c:658 [inline] __se_sys_fchmodat fs/open.c:655 [inline] __x64_sys_fchmodat+0xfd/0x1a0 fs/open.c:655 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd INITIAL USE at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178 sock_hash_delete_elem+0xac/0x2f0 net/core/sock_map.c:932 0xffffffffa000081a bpf_dispatcher_nop_func include/linux/bpf.h:989 [inline] __bpf_prog_run include/linux/filter.h:603 [inline] bpf_prog_run include/linux/filter.h:610 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2273 [inline] bpf_trace_run3+0x231/0x440 kernel/trace/bpf_trace.c:2313 __bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:114 trace_kmem_cache_free include/trace/events/kmem.h:114 [inline] kmem_cache_free+0x418/0x510 mm/slub.c:3682 user_path_at_empty+0x48/0x60 fs/namei.c:2909 user_path_at include/linux/namei.h:57 [inline] do_fchmodat fs/open.c:643 [inline] __do_sys_fchmodat fs/open.c:658 [inline] __se_sys_fchmodat fs/open.c:655 [inline] __x64_sys_fchmodat+0xfd/0x1a0 fs/open.c:655 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd } ... key at: [] sock_hash_alloc.__key+0x0/0x20 ... acquired at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178 sock_hash_delete_elem+0xac/0x2f0 net/core/sock_map.c:932 bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e bpf_dispatcher_nop_func include/linux/bpf.h:989 [inline] __bpf_prog_run include/linux/filter.h:603 [inline] bpf_prog_run include/linux/filter.h:610 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2273 [inline] bpf_trace_run1+0x1d9/0x3d0 kernel/trace/bpf_trace.c:2311 __traceiter_workqueue_activate_work+0x64/0xb0 include/trace/events/workqueue.h:59 trace_workqueue_activate_work+0x1c0/0x250 include/trace/events/workqueue.h:59 __queue_work+0xa81/0xf90 kernel/workqueue.c:1509 mod_delayed_work_on+0x101/0x250 kernel/workqueue.c:1742 kblockd_mod_delayed_work_on+0x25/0x30 block/blk-core.c:1047 blk_mq_sched_insert_request+0x1e5/0x430 block/blk-mq-sched.c:457 blk_mq_submit_bio+0x14b0/0x2590 block/blk-mq.c:3047 __submit_bio+0x261/0x2f0 block/blk-core.c:590 __submit_bio_noacct_mq block/blk-core.c:667 [inline] submit_bio_noacct_nocheck+0x976/0xd10 block/blk-core.c:696 __ext4_read_bh fs/ext4/super.c:174 [inline] ext4_read_bh+0x1ad/0x260 fs/ext4/super.c:198 __ext4_block_zero_page_range fs/ext4/inode.c:3790 [inline] ext4_block_zero_page_range+0x5f7/0x960 fs/ext4/inode.c:3856 ext4_block_truncate_page fs/ext4/inode.c:3880 [inline] ext4_truncate+0x964/0x1290 fs/ext4/inode.c:4257 ext4_truncate_failed_write fs/ext4/truncate.h:22 [inline] ext4_inode_extension_cleanup+0x1ba/0x2e0 fs/ext4/file.c:331 ext4_dio_write_iter fs/ext4/file.c:570 [inline] ext4_file_write_iter+0x14b7/0x1880 fs/ext4/file.c:677 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7ae/0xba0 fs/read_write.c:584 ksys_write+0x19c/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd stack backtrace: CPU: 0 PID: 11718 Comm: syz-executor.2 Not tainted 6.1.84-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2604 [inline] check_irq_usage kernel/locking/lockdep.c:2843 [inline] check_prev_add kernel/locking/lockdep.c:3094 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain+0x4d16/0x5950 kernel/locking/lockdep.c:3825 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178 sock_hash_delete_elem+0xac/0x2f0 net/core/sock_map.c:932 bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e bpf_dispatcher_nop_func include/linux/bpf.h:989 [inline] __bpf_prog_run include/linux/filter.h:603 [inline] bpf_prog_run include/linux/filter.h:610 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2273 [inline] bpf_trace_run1+0x1d9/0x3d0 kernel/trace/bpf_trace.c:2311 __traceiter_workqueue_activate_work+0x64/0xb0 include/trace/events/workqueue.h:59 trace_workqueue_activate_work+0x1c0/0x250 include/trace/events/workqueue.h:59 __queue_work+0xa81/0xf90 kernel/workqueue.c:1509 mod_delayed_work_on+0x101/0x250 kernel/workqueue.c:1742 kblockd_mod_delayed_work_on+0x25/0x30 block/blk-core.c:1047 blk_mq_sched_insert_request+0x1e5/0x430 block/blk-mq-sched.c:457 blk_mq_submit_bio+0x14b0/0x2590 block/blk-mq.c:3047 __submit_bio+0x261/0x2f0 block/blk-core.c:590 __submit_bio_noacct_mq block/blk-core.c:667 [inline] submit_bio_noacct_nocheck+0x976/0xd10 block/blk-core.c:696 __ext4_read_bh fs/ext4/super.c:174 [inline] ext4_read_bh+0x1ad/0x260 fs/ext4/super.c:198 __ext4_block_zero_page_range fs/ext4/inode.c:3790 [inline] ext4_block_zero_page_range+0x5f7/0x960 fs/ext4/inode.c:3856 ext4_block_truncate_page fs/ext4/inode.c:3880 [inline] ext4_truncate+0x964/0x1290 fs/ext4/inode.c:4257 ext4_truncate_failed_write fs/ext4/truncate.h:22 [inline] ext4_inode_extension_cleanup+0x1ba/0x2e0 fs/ext4/file.c:331 ext4_dio_write_iter fs/ext4/file.c:570 [inline] ext4_file_write_iter+0x14b7/0x1880 fs/ext4/file.c:677 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7ae/0xba0 fs/read_write.c:584 ksys_write+0x19c/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff9b767de69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff9b835e0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ff9b77abf80 RCX: 00007ff9b767de69 RDX: 00007ffffffff000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00007ff9b76ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007ff9b77abf80 R15: 00007fff0e92a4b8