------------[ cut here ]------------ sk->sk_forward_alloc WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:162, CPU#0: kworker/u32:2/41 Modules linked in: CPU: 0 UID: 0 PID: 41 Comm: kworker/u32:2 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: iou_exit io_ring_exit_work RIP: 0010:inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:162 Code: 2f 4d ff e9 06 fd ff ff e8 ea 7d fd f7 90 0f 0b 90 e9 35 fe ff ff e8 dc 7d fd f7 90 0f 0b 90 e9 c5 fe ff ff e8 ce 7d fd f7 90 <0f> 0b 90 e9 04 ff ff ff e8 c0 7d fd f7 90 0f 0b 90 e9 65 fe ff ff RSP: 0018:ffffc90000007d88 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88805ab2d500 RCX: ffffffff8a0b31d7 RDX: ffff88801cf78000 RSI: ffffffff8a0b32d2 RDI: ffff88801cf78000 RBP: 0000000000000f70 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000f70 R11: 000000000000757b R12: ffff88805ab2d500 R13: ffff88805ab2d590 R14: ffffffff81ee353d R15: 0000000000000005 FS: 0000000000000000(0000) GS:ffff8880d636d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000005cdac000 CR4: 0000000000352ef0 Call Trace: __sk_destruct+0x85/0xab0 net/core/sock.c:2352 rcu_do_batch kernel/rcu/tree.c:2617 [inline] rcu_core+0x5a2/0x10d0 kernel/rcu/tree.c:2869 handle_softirqs+0x1ea/0xa00 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline] sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:kasan_check_range+0x12/0x1e0 mm/kasan/generic.c:199 Code: 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 85 f6 0f 84 7a 01 00 00 48 89 f8 41 54 <41> 89 d0 48 01 f0 55 53 0f 82 e6 00 00 00 eb 0f cc cc cc 48 b8 00 RSP: 0018:ffffc9000079f570 EFLAGS: 00000202 RAX: ffff888100a7bff0 RBX: ffff888100a7bff0 RCX: ffffffff8280df7a RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff888100a7bff0 RBP: 0000000000000333 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000001a6033e R11: 0000000000000000 R12: ffff88801cf78000 R13: 0000000001a6033e R14: 0000000000000400 R15: ffff888100a7bff8 instrument_write include/linux/instrumented.h:41 [inline] ___clear_bit include/asm-generic/bitops/instrumented-non-atomic.h:44 [inline] __update_page_owner_free_handle.isra.0+0x1aa/0x4d0 mm/page_owner.c:288 __reset_page_owner+0x93/0x190 mm/page_owner.c:321 reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] free_unref_folios+0xa0d/0x16f0 mm/page_alloc.c:3004 folios_put_refs+0x571/0xa90 mm/swap.c:1008 release_pages+0x275/0x3d0 mm/swap.c:1048 io_free_region+0x23e/0x2a0 io_uring/memmap.c:102 io_rings_free io_uring/io_uring.c:2086 [inline] io_ring_ctx_free io_uring/io_uring.c:2194 [inline] io_ring_exit_work+0xa14/0xd40 io_uring/io_uring.c:2423 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3314 process_scheduled_works kernel/workqueue.c:3397 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3478 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 0f 1f 40 00 nopl 0x0(%rax) 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 0f 1f 40 d6 nopl -0x2a(%rax) 1c: 48 85 f6 test %rsi,%rsi 1f: 0f 84 7a 01 00 00 je 0x19f 25: 48 89 f8 mov %rdi,%rax 28: 41 54 push %r12 * 2a: 41 89 d0 mov %edx,%r8d <-- trapping instruction 2d: 48 01 f0 add %rsi,%rax 30: 55 push %rbp 31: 53 push %rbx 32: 0f 82 e6 00 00 00 jb 0x11e 38: eb 0f jmp 0x49 3a: cc int3 3b: cc int3 3c: cc int3 3d: 48 rex.W 3e: b8 .byte 0xb8