Hello, syzbot found the following issue on: HEAD commit: e1084bacab44 Add linux-next specific files for 20220816 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=14c686a5080000 kernel config: https://syzkaller.appspot.com/x/.config?x=2f5fa747986be53a dashboard link: https://syzkaller.appspot.com/bug?extid=e8d2360e9962d57f8072 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e8d2360e9962d57f8072@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: unable to handle page fault for address: ffffdc0000000008 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 11826067 P4D 11826067 PUD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8 Comm: kworker/u4:0 Not tainted 6.0.0-rc1-next-20220816-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Workqueue: events_unbound async_run_entry_fn RIP: 0010:entity_before kernel/sched/fair.c:585 [inline] RIP: 0010:__entity_less kernel/sched/fair.c:621 [inline] RIP: 0010:rb_add_cached include/linux/rbtree.h:174 [inline] RIP: 0010:__enqueue_entity kernel/sched/fair.c:629 [inline] RIP: 0010:enqueue_entity+0x389/0x1520 kernel/sched/fair.c:4618 Code: 00 0f 85 57 0e 00 00 48 8b 53 50 be 01 00 00 00 49 bd 00 00 00 00 00 fc ff df eb 03 48 89 c5 48 8d 7d 40 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 77 0c 00 00 48 3b 55 40 4c 8d 65 10 78 06 4c RSP: 0000:ffffc900001e0b00 EFLAGS: 00010802 RAX: 1fffe00000000008 RBX: ffff88801b1a5900 RCX: 0000000000000100 RDX: 00000000f90154e3 RSI: 0000000000000000 RDI: ffff000000000040 RBP: ffff000000000000 R08: ffff88801b1a5910 R09: ffff8880b9b3a080 R10: fffffbfff1bbd5ba R11: 0000000000000001 R12: ffff88801fc28098 R13: dffffc0000000000 R14: ffff8880b9b3a040 R15: ffff8880b9b3a050 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffdc0000000008 CR3: 000000000bc8e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> enqueue_task_fair+0x1ba/0xce0 kernel/sched/fair.c:5921 enqueue_task+0xad/0x3a0 kernel/sched/core.c:2066 activate_task kernel/sched/core.c:2091 [inline] ttwu_do_activate+0x157/0x330 kernel/sched/core.c:3670 ttwu_queue kernel/sched/core.c:3875 [inline] try_to_wake_up+0xcc0/0x1e60 kernel/sched/core.c:4198 wake_up_worker kernel/workqueue.c:865 [inline] insert_work+0x27e/0x350 kernel/workqueue.c:1376 __queue_work+0x625/0x1210 kernel/workqueue.c:1527 queue_work_on+0x143/0x170 kernel/workqueue.c:1562 queue_work include/linux/workqueue.h:508 [inline] schedule_work include/linux/workqueue.h:569 [inline] __vfree_deferred mm/vmalloc.c:2718 [inline] __vfree+0xb0/0xd0 mm/vmalloc.c:2742 vfree+0x5a/0x90 mm/vmalloc.c:2775 thread_stack_free_rcu+0x88/0xa0 kernel/fork.c:221 rcu_do_batch kernel/rcu/tree.c:2245 [inline] rcu_core+0x7b5/0x1890 kernel/rcu/tree.c:2505 __do_softirq+0x1d3/0x9c6 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:lock_acquire+0x1ef/0x570 kernel/locking/lockdep.c:5634 Code: eb a2 7e 83 f8 01 0f 85 e8 02 00 00 9c 58 f6 c4 02 0f 85 fb 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0000:ffffc900000d7660 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff9200001aece RCX: 6ba147c65e712bc2 RDX: 1ffff11027fccc5e RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff908de947 R10: fffffbfff211bd28 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff8bf89a80 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:280 [inline] rcu_read_lock include/linux/rcupdate.h:706 [inline] blk_mq_run_hw_queue+0xbf/0x490 block/blk-mq.c:2138 blk_mq_sched_restart block/blk-mq-sched.h:35 [inline] __blk_mq_free_request+0x26c/0x3f0 block/blk-mq.c:624 blk_mq_free_request+0x35b/0x500 block/blk-mq.c:647 __scsi_execute+0x452/0x5d0 drivers/scsi/scsi_lib.c:261 scsi_execute_req include/scsi/scsi_device.h:479 [inline] scsi_probe_lun drivers/scsi/scsi_scan.c:685 [inline] scsi_probe_and_add_lun+0x521/0x3660 drivers/scsi/scsi_scan.c:1199 __scsi_scan_target+0x21f/0xdb0 drivers/scsi/scsi_scan.c:1673 scsi_scan_channel drivers/scsi/scsi_scan.c:1761 [inline] scsi_scan_channel+0x148/0x1e0 drivers/scsi/scsi_scan.c:1737 scsi_scan_host_selected+0x2df/0x3b0 drivers/scsi/scsi_scan.c:1790 do_scsi_scan_host+0x1e8/0x260 drivers/scsi/scsi_scan.c:1929 do_scan_async+0x3e/0x500 drivers/scsi/scsi_scan.c:1939 async_run_entry_fn+0x98/0x530 kernel/async.c:127 process_one_work+0x991/0x1610 kernel/workqueue.c:2312 worker_thread+0x665/0x1080 kernel/workqueue.c:2459 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 </TASK> Modules linked in: CR2: ffffdc0000000008 ---[ end trace 0000000000000000 ]--- RIP: 0010:entity_before kernel/sched/fair.c:585 [inline] RIP: 0010:__entity_less kernel/sched/fair.c:621 [inline] RIP: 0010:rb_add_cached include/linux/rbtree.h:174 [inline] RIP: 0010:__enqueue_entity kernel/sched/fair.c:629 [inline] RIP: 0010:enqueue_entity+0x389/0x1520 kernel/sched/fair.c:4618 Code: 00 0f 85 57 0e 00 00 48 8b 53 50 be 01 00 00 00 49 bd 00 00 00 00 00 fc ff df eb 03 48 89 c5 48 8d 7d 40 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 77 0c 00 00 48 3b 55 40 4c 8d 65 10 78 06 4c RSP: 0000:ffffc900001e0b00 EFLAGS: 00010802 RAX: 1fffe00000000008 RBX: ffff88801b1a5900 RCX: 0000000000000100 RDX: 00000000f90154e3 RSI: 0000000000000000 RDI: ffff000000000040 RBP: ffff000000000000 R08: ffff88801b1a5910 R09: ffff8880b9b3a080 R10: fffffbfff1bbd5ba R11: 0000000000000001 R12: ffff88801fc28098 R13: dffffc0000000000 R14: ffff8880b9b3a040 R15: ffff8880b9b3a050 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffdc0000000008 CR3: 000000000bc8e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 0f add %cl,(%rdi) 2: 85 57 0e test %edx,0xe(%rdi) 5: 00 00 add %al,(%rax) 7: 48 8b 53 50 mov 0x50(%rbx),%rdx b: be 01 00 00 00 mov $0x1,%esi 10: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13 17: fc ff df 1a: eb 03 jmp 0x1f 1c: 48 89 c5 mov %rax,%rbp 1f: 48 8d 7d 40 lea 0x40(%rbp),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 0f 85 77 0c 00 00 jne 0xcac 35: 48 3b 55 40 cmp 0x40(%rbp),%rdx 39: 4c 8d 65 10 lea 0x10(%rbp),%r12 3d: 78 06 js 0x45 3f: 4c rex.WR --- This report is generated by a bot. 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