BUG: kernel NULL pointer dereference, address: 0000000000000002 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 800000002fc40067 P4D 800000002fc40067 PUD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 UID: 0 PID: 25 Comm: kworker/1:0 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: slub_flushwq flush_cpu_slab RIP: 0010:PagePoisoned include/linux/page-flags.h:293 [inline] RIP: 0010:page_to_nid include/linux/mm.h:1647 [inline] RIP: 0010:folio_nid include/linux/mm.h:1653 [inline] RIP: 0010:slab_nid mm/slab.h:196 [inline] RIP: 0010:__put_partials+0x26/0x130 mm/slub.c:3119 Code: 90 90 90 90 55 41 57 41 56 41 55 41 54 53 50 48 85 f6 0f 84 df 00 00 00 48 89 f3 49 89 fe 31 c0 48 89 04 24 45 31 ff 45 31 ed <48> 8b 03 48 83 f8 ff 0f 84 d3 00 00 00 4c 8b 63 10 48 c1 e8 3a 49 RSP: 0018:ffffc900001f7b18 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff81718e6a RDX: dffffc0000000000 RSI: 0000000000000002 RDI: ffff88803003f8c0 RBP: 0000000000000001 R08: ffffffff942ea8b7 R09: 1ffffffff285d516 R10: dffffc0000000000 R11: fffffbfff285d517 R12: 0000000000000002 R13: 0000000000000000 R14: ffff88803003f8c0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000002 CR3: 00000000667dc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: put_partials mm/slub.c:3164 [inline] flush_cpu_slab+0x2bf/0x450 mm/slub.c:3299 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Modules linked in: CR2: 0000000000000002 ---[ end trace 0000000000000000 ]--- RIP: 0010:PagePoisoned include/linux/page-flags.h:293 [inline] RIP: 0010:page_to_nid include/linux/mm.h:1647 [inline] RIP: 0010:folio_nid include/linux/mm.h:1653 [inline] RIP: 0010:slab_nid mm/slab.h:196 [inline] RIP: 0010:__put_partials+0x26/0x130 mm/slub.c:3119 Code: 90 90 90 90 55 41 57 41 56 41 55 41 54 53 50 48 85 f6 0f 84 df 00 00 00 48 89 f3 49 89 fe 31 c0 48 89 04 24 45 31 ff 45 31 ed <48> 8b 03 48 83 f8 ff 0f 84 d3 00 00 00 4c 8b 63 10 48 c1 e8 3a 49 RSP: 0018:ffffc900001f7b18 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff81718e6a RDX: dffffc0000000000 RSI: 0000000000000002 RDI: ffff88803003f8c0 RBP: 0000000000000001 R08: ffffffff942ea8b7 R09: 1ffffffff285d516 R10: dffffc0000000000 R11: fffffbfff285d517 R12: 0000000000000002 R13: 0000000000000000 R14: ffff88803003f8c0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000002 CR3: 00000000667dc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 55 push %rbp 5: 41 57 push %r15 7: 41 56 push %r14 9: 41 55 push %r13 b: 41 54 push %r12 d: 53 push %rbx e: 50 push %rax f: 48 85 f6 test %rsi,%rsi 12: 0f 84 df 00 00 00 je 0xf7 18: 48 89 f3 mov %rsi,%rbx 1b: 49 89 fe mov %rdi,%r14 1e: 31 c0 xor %eax,%eax 20: 48 89 04 24 mov %rax,(%rsp) 24: 45 31 ff xor %r15d,%r15d 27: 45 31 ed xor %r13d,%r13d * 2a: 48 8b 03 mov (%rbx),%rax <-- trapping instruction 2d: 48 83 f8 ff cmp $0xffffffffffffffff,%rax 31: 0f 84 d3 00 00 00 je 0x10a 37: 4c 8b 63 10 mov 0x10(%rbx),%r12 3b: 48 c1 e8 3a shr $0x3a,%rax 3f: 49 rex.WB