Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 UID: 0 PID: 72 Comm: kworker/u8:4 Not tainted 6.13.0-rc3-syzkaller-00026-g59dbb9d81adf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 Workqueue: iou_exit io_ring_exit_work RIP: 0010:_compound_head include/linux/page-flags.h:242 [inline] RIP: 0010:put_page+0x21/0x280 include/linux/mm.h:1552 Code: 90 90 90 90 90 90 90 90 90 41 54 55 53 48 89 fb e8 04 2a 98 f8 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 20 02 00 00 4c 8b 63 08 31 ff 4c 89 e5 83 e5 01 RSP: 0018:ffffc90000007428 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff890368b8 RDX: 0000000000000001 RSI: ffffffff8901ea3c RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000006 R12: ffff8880277ae500 R13: ffff888043f36840 R14: ffff888043f36870 R15: 0000000000000007 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e907ff8 CR3: 000000000df7e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 00000000332e000e DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: skb_page_unref include/linux/skbuff_ref.h:43 [inline] __skb_frag_unref include/linux/skbuff_ref.h:56 [inline] skb_release_data+0x4d7/0x730 net/core/skbuff.c:1119 skb_release_all net/core/skbuff.c:1190 [inline] __kfree_skb+0x4f/0x70 net/core/skbuff.c:1204 tcp_wmem_free_skb include/net/tcp.h:306 [inline] tcp_rtx_queue_unlink_and_free include/net/tcp.h:2091 [inline] tcp_clean_rtx_queue net/ipv4/tcp_input.c:3436 [inline] tcp_ack+0x1eb7/0x5ba0 net/ipv4/tcp_input.c:4032 tcp_rcv_state_process+0xdd4/0x4c40 net/ipv4/tcp_input.c:6805 tcp_v4_do_rcv+0x1ad/0xa90 net/ipv4/tcp_ipv4.c:1939 tcp_v4_rcv+0x33a0/0x4380 net/ipv4/tcp_ipv4.c:2351 ip_protocol_deliver_rcu+0xba/0x4c0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x316/0x570 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:460 [inline] ip_rcv_finish net/ipv4/ip_input.c:447 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_rcv+0x2c3/0x5d0 net/ipv4/ip_input.c:567 __netif_receive_skb_one_core+0x199/0x1e0 net/core/dev.c:5672 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5785 process_backlog+0x443/0x15f0 net/core/dev.c:6117 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6883 napi_poll net/core/dev.c:6952 [inline] net_rx_action+0xa94/0x1010 net/core/dev.c:7074 handle_softirqs+0x213/0x8f0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__update_page_owner_free_handle mm/page_owner.c:275 [inline] RIP: 0010:__reset_page_owner+0x164/0x400 mm/page_owner.c:298 Code: 18 48 b8 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 89 02 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b 04 24 <49> 89 47 18 65 48 8b 05 20 91 fd 7d 48 8d b8 c8 05 00 00 48 89 fe RSP: 0018:ffffc9000213f8c8 EFLAGS: 00000246 RAX: 00000052267c538d RBX: 00000000000000a7 RCX: dffffc0000000000 RDX: ffff88801bb60000 RSI: ffffffff820647a7 RDI: ffff88801e8f3450 RBP: ffff88801e8f3430 R08: 0000000000000001 R09: ffffed1003d1e686 R10: ffff88801e8f3437 R11: 0000000000000b92 R12: 00000000023c029d R13: 0000000000000100 R14: 0000000000000008 R15: ffff88801e8f3438 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] __free_pages_ok+0x62b/0xe40 mm/page_alloc.c:1269 __folio_put+0x32a/0x450 mm/swap.c:112 folio_put include/linux/mm.h:1488 [inline] put_page+0x21e/0x280 include/linux/mm.h:1560 io_pages_unmap+0x1ab/0x3d0 io_uring/memmap.c:114 io_rings_free+0x9f/0x300 io_uring/io_uring.c:2650 io_ring_ctx_free io_uring/io_uring.c:2750 [inline] io_ring_exit_work+0xce0/0x1b20 io_uring/io_uring.c:2964 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 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: ---[ end trace 0000000000000000 ]--- RIP: 0010:_compound_head include/linux/page-flags.h:242 [inline] RIP: 0010:put_page+0x21/0x280 include/linux/mm.h:1552 Code: 90 90 90 90 90 90 90 90 90 41 54 55 53 48 89 fb e8 04 2a 98 f8 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 20 02 00 00 4c 8b 63 08 31 ff 4c 89 e5 83 e5 01 RSP: 0018:ffffc90000007428 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff890368b8 RDX: 0000000000000001 RSI: ffffffff8901ea3c RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000006 R12: ffff8880277ae500 R13: ffff888043f36840 R14: ffff888043f36870 R15: 0000000000000007 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e907ff8 CR3: 000000000df7e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 00000000332e000e DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 41 54 push %r12 b: 55 push %rbp c: 53 push %rbx d: 48 89 fb mov %rdi,%rbx 10: e8 04 2a 98 f8 call 0xf8982a19 15: 48 8d 7b 08 lea 0x8(%rbx),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 20 02 00 00 jne 0x254 34: 4c 8b 63 08 mov 0x8(%rbx),%r12 38: 31 ff xor %edi,%edi 3a: 4c 89 e5 mov %r12,%rbp 3d: 83 e5 01 and $0x1,%ebp