================================ WARNING: inconsistent lock state 6.9.0-rc6-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.2/5095 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff8880b9538a80 (lock#10){+.?.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline] ffff8880b9538a80 (lock#10){+.?.}-{2:2}, at: __mmap_lock_do_trace_acquire_returned+0x7f/0x790 mm/mmap_lock.c:237 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] __mmap_lock_do_trace_acquire_returned+0x97/0x790 mm/mmap_lock.c:237 __mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline] mmap_read_trylock include/linux/mmap_lock.h:166 [inline] get_mmap_lock_carefully mm/memory.c:5633 [inline] lock_mm_and_find_vma+0xeb/0x580 mm/memory.c:5693 do_user_addr_fault+0x29c/0x1080 arch/x86/mm/fault.c:1385 handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 irq event stamp: 1468171 hardirqs last enabled at (1468170): [] seqcount_lockdep_reader_access include/linux/seqlock.h:74 [inline] hardirqs last enabled at (1468170): [] timekeeping_get_delta kernel/time/timekeeping.c:254 [inline] hardirqs last enabled at (1468170): [] timekeeping_get_ns kernel/time/timekeeping.c:388 [inline] hardirqs last enabled at (1468170): [] ktime_get+0x389/0x4a0 kernel/time/timekeeping.c:848 hardirqs last disabled at (1468171): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (1468171): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (1468060): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (1468060): [] __do_softirq+0x5da/0x922 kernel/softirq.c:583 softirqs last disabled at (1468159): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (1468159): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (1468159): [] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(lock#10); lock(lock#10); *** DEADLOCK *** 5 locks held by syz-executor.2/5095: #0: ffff888018e82d18 (&fq->mq_flush_lock){..-.}-{2:2}, at: flush_end_io+0xcb/0xf70 block/blk-flush.c:226 #1: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #1: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #1: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: __queue_work+0xf2/0x1020 kernel/workqueue.c:2324 #2: ffff8880b953ddb8 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x39e/0x1020 kernel/workqueue.c:2360 #3: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #3: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #3: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline] #3: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run3+0xf8/0x440 kernel/trace/bpf_trace.c:2421 #4: ffff88807f3e1e20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline] #4: ffff88807f3e1e20 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x1e8/0x7d0 kernel/bpf/stackmap.c:141 stack backtrace: CPU: 1 PID: 5095 Comm: syz-executor.2 Not tainted 6.9.0-rc6-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+0x116/0x1f0 lib/dump_stack.c:114 print_usage_bug kernel/locking/lockdep.c:3971 [inline] valid_state kernel/locking/lockdep.c:4013 [inline] mark_lock_irq kernel/locking/lockdep.c:4216 [inline] mark_lock+0x923/0xc60 kernel/locking/lockdep.c:4678 mark_usage kernel/locking/lockdep.c:4567 [inline] __lock_acquire+0x13d4/0x3b30 kernel/locking/lockdep.c:5091 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] __mmap_lock_do_trace_acquire_returned+0x97/0x790 mm/mmap_lock.c:237 __mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline] mmap_read_trylock include/linux/mmap_lock.h:166 [inline] stack_map_get_build_id_offset+0x5df/0x7d0 kernel/bpf/stackmap.c:141 __bpf_get_stack+0x6bf/0x700 kernel/bpf/stackmap.c:449 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1985 [inline] bpf_get_stack_raw_tp+0x124/0x160 kernel/trace/bpf_trace.c:1975 ___bpf_prog_run+0x3e51/0xabd0 kernel/bpf/core.c:1997 __bpf_prog_run32+0xc1/0x100 kernel/bpf/core.c:2236 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_run3+0x167/0x440 kernel/trace/bpf_trace.c:2421 __bpf_trace_workqueue_queue_work+0x101/0x140 include/trace/events/workqueue.h:23 trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline] __queue_work+0x627/0x1020 kernel/workqueue.c:2382 __queue_delayed_work+0x21b/0x2e0 kernel/workqueue.c:2551 mod_delayed_work_on+0xcc/0x1b0 kernel/workqueue.c:2634 kblockd_mod_delayed_work_on+0x29/0x40 block/blk-core.c:1085 blk_flush_complete_seq+0x3ad/0x10c0 block/blk-flush.c:194 flush_end_io+0x77a/0xf70 block/blk-flush.c:264 __blk_mq_end_request+0x298/0x6f0 block/blk-mq.c:1044 scsi_end_request+0x440/0x9b0 drivers/scsi/scsi_lib.c:665 scsi_io_completion+0x259/0x14c0 drivers/scsi/scsi_lib.c:1068 scsi_complete+0x124/0x250 drivers/scsi/scsi_lib.c:1530 blk_complete_reqs+0xae/0xf0 block/blk-mq.c:1129 __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 common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 RIP: 0010:finish_task_switch.isra.0+0x220/0xcc0 kernel/sched/core.c:5283 Code: a9 0a 00 00 44 8b 0d 87 21 41 0e 45 85 c9 0f 85 c0 01 00 00 48 89 df e8 ae f8 ff ff e8 89 84 36 00 fb 65 48 8b 1d 10 7c a5 7e <48> 8d bb f0 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffffc9000379f7b8 EFLAGS: 00000202 RAX: 00000000001666fd RBX: ffff88802c261e00 RCX: 1ffffffff1f3e0d1 RDX: 0000000000000000 RSI: ffffffff8b0cade0 RDI: ffffffff8b6f5520 RBP: ffffc9000379f800 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8f9f4917 R11: 0000000000000000 R12: ffff8880b953f7b8 R13: ffff88802f35da00 R14: ffff888057d9d580 R15: ffff8880b953ea40 context_switch kernel/sched/core.c:5412 [inline] __schedule+0xf1d/0x5d00 kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6838 blk_mq_freeze_queue_wait+0x146/0x190 block/blk-mq.c:138 __loop_clr_fd+0x480/0x850 drivers/block/loop.c:1148 loop_clr_fd drivers/block/loop.c:1253 [inline] lo_ioctl+0x5dc/0x1950 drivers/block/loop.c:1555 blkdev_ioctl+0x2f7/0x770 block/ioctl.c:642 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff8c3c7dc0b Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00 RSP: 002b:00007ffd85860b70 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007ff8c3c7dc0b RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003 RBP: 00007ffd85860c2c R08: 0000000000000000 R09: 00007ffd85860917 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000003c R13: 0000000000028177 R14: 0000000000028177 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: a9 0a 00 00 44 test $0x4400000a,%eax 5: 8b 0d 87 21 41 0e mov 0xe412187(%rip),%ecx # 0xe412192 b: 45 85 c9 test %r9d,%r9d e: 0f 85 c0 01 00 00 jne 0x1d4 14: 48 89 df mov %rbx,%rdi 17: e8 ae f8 ff ff call 0xfffff8ca 1c: e8 89 84 36 00 call 0x3684aa 21: fb sti 22: 65 48 8b 1d 10 7c a5 mov %gs:0x7ea57c10(%rip),%rbx # 0x7ea57c3a 29: 7e * 2a: 48 8d bb f0 15 00 00 lea 0x15f0(%rbx),%rdi <-- trapping instruction 31: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 38: fc ff df 3b: 48 89 fa mov %rdi,%rdx 3e: 48 rex.W 3f: c1 .byte 0xc1