netlink: 16 bytes leftover after parsing attributes in process `syz-executor.5'. BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:1355 in_atomic(): 0, irqs_disabled(): 1, pid: 6447, name: syz-executor.0 1 lock held by syz-executor.0/6447: #0: 00000000d1fcfcfd (&mm->mmap_sem){++++}, at: __do_page_fault+0x3e2/0xde0 arch/x86/mm/fault.c:1341 irq event stamp: 1456446 hardirqs last enabled at (1456445): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (1456445): [] _raw_spin_unlock_irq+0x24/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (1456446): [] exit_to_usermode_loop+0x1bb/0x2a0 arch/x86/entry/common.c:175 softirqs last enabled at (1456396): [] tcp_close+0x8d1/0xfd0 net/ipv4/tcp.c:2503 softirqs last disabled at (1456394): [] spin_lock_bh include/linux/spinlock.h:334 [inline] softirqs last disabled at (1456394): [] release_sock+0x1b/0x1b0 net/core/sock.c:2858 CPU: 1 PID: 6447 Comm: syz-executor.0 Not tainted 4.19.131-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2fe lib/dump_stack.c:118 ___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6194 __do_page_fault+0x40d/0xde0 arch/x86/mm/fault.c:1355 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 RIP: 0010: (null) Code: Bad RIP value. RSP: 0018:ffff888096977f38 EFLAGS: 00010093 RAX: ffff88808b11e200 RBX: ffff88808b11e200 RCX: ffffffff81007b5f RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff888096977f58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000002 R14: ffffffff81009d38 R15: 0000000000000000 BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 PGD 9f168067 P4D 9f168067 PUD 9f169067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 6447 Comm: syz-executor.0 Tainted: G W 4.19.131-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010: (null) Code: Bad RIP value. RSP: 0018:ffff888096977f38 EFLAGS: 00010093 RAX: ffff88808b11e200 RBX: ffff88808b11e200 RCX: ffffffff81007b5f RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff888096977f58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000002 R14: ffffffff81009d38 R15: 0000000000000000 FS: 0000000002537940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000009f18f000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Modules linked in: CR2: 0000000000000000 ---[ end trace 84f66fce8aa76c18 ]--- RIP: 0010: (null) Code: Bad RIP value. RSP: 0018:ffff888096977f38 EFLAGS: 00010093 RAX: ffff88808b11e200 RBX: ffff88808b11e200 RCX: ffffffff81007b5f RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff888096977f58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000002 R14: ffffffff81009d38 R15: 0000000000000000 FS: 0000000002537940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000009f18f000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400