BUG: sleeping function called from invalid context at mm/vmalloc.c:3409 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5888, name: syz-executor preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 1 lock held by syz-executor/5888: #0: ffff888051988258 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1667 [inline] #0: ffff888051988258 (sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_sendmsg+0x20/0x50 net/ipv4/tcp.c:1392 Preemption disabled at: [] preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 CPU: 3 UID: 0 PID: 5888 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120 __might_resched+0x3c0/0x5e0 kernel/sched/core.c:8957 vfree+0x75/0xb50 mm/vmalloc.c:3409 futex_hash_free+0x98/0xc0 kernel/futex/core.c:1742 __mmdrop+0x33f/0x580 kernel/fork.c:692 mmdrop include/linux/sched/mm.h:55 [inline] mmdrop_sched include/linux/sched/mm.h:83 [inline] mmdrop_lazy_tlb_sched include/linux/sched/mm.h:110 [inline] finish_task_switch.isra.0+0x7a4/0xc10 kernel/sched/core.c:5250 context_switch kernel/sched/core.c:5360 [inline] __schedule+0x1198/0x5de0 kernel/sched/core.c:6961 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:7145 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0x61/0x80 kernel/locking/spinlock.c:194 __debug_check_no_obj_freed lib/debugobjects.c:1108 [inline] debug_check_no_obj_freed+0x31f/0x600 lib/debugobjects.c:1129 free_pages_prepare mm/page_alloc.c:1402 [inline] __free_frozen_pages+0x31b/0x10f0 mm/page_alloc.c:2895 __folio_put+0x329/0x450 mm/swap.c:112 folio_put include/linux/mm.h:1360 [inline] put_page include/linux/mm.h:1429 [inline] put_netmem net/core/skbuff.c:7370 [inline] skb_page_unref include/linux/skbuff_ref.h:43 [inline] __skb_frag_unref include/linux/skbuff_ref.h:56 [inline] skb_release_data+0x81a/0x9e0 net/core/skbuff.c:1080 skb_release_all net/core/skbuff.c:1151 [inline] __kfree_skb+0x4f/0x70 net/core/skbuff.c:1165 tcp_wmem_free_skb include/net/tcp.h:308 [inline] tcp_rtx_queue_unlink_and_free include/net/tcp.h:2157 [inline] tcp_clean_rtx_queue net/ipv4/tcp_input.c:3319 [inline] tcp_ack+0x19b2/0x5bf0 net/ipv4/tcp_input.c:3922 tcp_rcv_established+0x537/0x23f0 net/ipv4/tcp_input.c:6205 tcp_v4_do_rcv+0x5ca/0xa90 net/ipv4/tcp_ipv4.c:1926 sk_backlog_rcv include/net/sock.h:1148 [inline] __release_sock+0x31b/0x400 net/core/sock.c:3194 release_sock+0x5a/0x220 net/core/sock.c:3748 tcp_sendmsg+0x38/0x50 net/ipv4/tcp.c:1394 inet_sendmsg+0xb9/0x140 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg net/socket.c:729 [inline] sock_write_iter+0x4aa/0x5b0 net/socket.c:1179 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x7d0/0x11d0 fs/read_write.c:686 ksys_write+0x1f8/0x250 fs/read_write.c:738 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7f53579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000ffe178a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000f2025d60 RDX: 000000000004a2a0 RSI: 00000000f73e4ff4 RDI: 0000000000000000 RBP: 000000000004a2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi