BUG: unable to handle page fault for address: ffffffffff000180 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD d97e067 P4D d97e067 PUD d980067 PMD d9a0067 PTE 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: rcu_gp srcu_invoke_callbacks RIP: 0010:rcu_seq_current kernel/rcu/rcu.h:138 [inline] RIP: 0010:srcu_invoke_callbacks+0x162/0x490 kernel/rcu/srcutree.c:1732 Code: 02 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 38 48 8d bb 80 01 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d2 02 00 00 <48> 8b b3 80 01 00 00 48 8d 85 20 ff ff ff 48 89 c7 48 89 44 24 08 RSP: 0018:ffffc900003a7bf8 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffffffffff000000 RCX: ffffffff816d25fd RDX: 1fffffffffe00030 RSI: 0000000000000004 RDI: ffffffffff000180 RBP: ffffe8ffad05d460 R08: 0000000000000001 R09: fffff52000074f71 R10: 0000000000000003 R11: 0000000000000002 R12: 1ffff92000074f83 R13: ffffc900031dfbe0 R14: ffffc900003a7c38 R15: ffffc900003a7d80 FS: 0000000000000000(0000) GS:ffff88802c000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff000180 CR3: 0000000055cc0000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: process_one_work+0x958/0x1ad0 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Modules linked in: CR2: ffffffffff000180 ---[ end trace 0000000000000000 ]--- RIP: 0010:rcu_seq_current kernel/rcu/rcu.h:138 [inline] RIP: 0010:srcu_invoke_callbacks+0x162/0x490 kernel/rcu/srcutree.c:1732 Code: 02 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 38 48 8d bb 80 01 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d2 02 00 00 <48> 8b b3 80 01 00 00 48 8d 85 20 ff ff ff 48 89 c7 48 89 44 24 08 RSP: 0018:ffffc900003a7bf8 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffffffffff000000 RCX: ffffffff816d25fd RDX: 1fffffffffe00030 RSI: 0000000000000004 RDI: ffffffffff000180 RBP: ffffe8ffad05d460 R08: 0000000000000001 R09: fffff52000074f71 R10: 0000000000000003 R11: 0000000000000002 R12: 1ffff92000074f83 R13: ffffc900031dfbe0 R14: ffffc900003a7c38 R15: ffffc900003a7d80 FS: 0000000000000000(0000) GS:ffff88802c000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff000180 CR3: 0000000055cc0000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 02 03 add (%rbx),%al 2: 00 00 add %al,(%rax) 4: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax b: fc ff df e: 48 8b 5b 38 mov 0x38(%rbx),%rbx 12: 48 8d bb 80 01 00 00 lea 0x180(%rbx),%rdi 19: 48 89 fa mov %rdi,%rdx 1c: 48 c1 ea 03 shr $0x3,%rdx 20: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 24: 0f 85 d2 02 00 00 jne 0x2fc * 2a: 48 8b b3 80 01 00 00 mov 0x180(%rbx),%rsi <-- trapping instruction 31: 48 8d 85 20 ff ff ff lea -0xe0(%rbp),%rax 38: 48 89 c7 mov %rax,%rdi 3b: 48 89 44 24 08 mov %rax,0x8(%rsp)