IPVS: length: 865 != 8 ================================================================== kasan: CONFIG_KASAN_INLINE enabled BUG: KASAN: stack-out-of-bounds in pgd_val arch/x86/include/asm/paravirt.h:414 [inline] BUG: KASAN: stack-out-of-bounds in p4d_page_vaddr arch/x86/include/asm/pgtable.h:895 [inline] BUG: KASAN: stack-out-of-bounds in pud_offset arch/x86/include/asm/pgtable.h:907 [inline] BUG: KASAN: stack-out-of-bounds in vmalloc_fault+0x6d0/0x770 arch/x86/mm/fault.c:397 kasan: GPF could be caused by NULL-ptr deref or user memory access Read of size 8 at addr ffff8881da96cff8 by task syz-executor1/6037 general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8083 Comm: syz-executor4 Not tainted 4.20.0-rc3+ #317 CPU: 1 PID: 6037 Comm: syz-executor1 Not tainted 4.20.0-rc3+ #317 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:vmalloc_fault+0x426/0x770 arch/x86/mm/fault.c:405 Call Trace: ------------[ cut here ]------------ __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected to SLAB object '$' (offset 18446744071562073440, size 64)! WARNING: CPU: 0 PID: 8083 at mm/usercopy.c:83 usercopy_warn+0xee/0x110 mm/usercopy.c:78 Kernel panic - not syncing: panic_on_warn set ... print_address_description.cold.7+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.8+0x242/0x309 mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 pgd_val arch/x86/include/asm/paravirt.h:414 [inline] p4d_page_vaddr arch/x86/include/asm/pgtable.h:895 [inline] pud_offset arch/x86/include/asm/pgtable.h:907 [inline] vmalloc_fault+0x6d0/0x770 arch/x86/mm/fault.c:397 do_kern_addr_fault arch/x86/mm/fault.c:1203 [inline] __do_page_fault+0x860/0xe60 arch/x86/mm/fault.c:1487 do_page_fault+0xf2/0x7e0 arch/x86/mm/fault.c:1520 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139 RIP: 0010:___cache_free+0x45/0x380 mm/slab.c:3520 Code: 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 52 05 d1 01 89 c0 4c 03 3c c5 20 80 27 89 83 3d 45 95 53 08 01 0f 8f ea 00 00 00 <41> 8b 47 04 41 39 07 0f 83 a0 01 00 00 0f 1f 44 00 00 41 8b 07 8d RSP: 0018:ffff8881bc32f338 EFLAGS: 00010046 RAX: 0000000000000001 RBX: ffff8881bb014180 RCX: ffffffff8393d1da RDX: 0000000000000000 RSI: ffffffff8393d1e8 RDI: 0000000000000005 RBP: ffff8881bc32f398 R08: ffff8881b2d221c0 R09: fffffbfff16581ad R10: fffffbfff16581ad R11: ffffffff8b2c0d6b R12: ffff888194320bc0 R13: 0000000000000086 R14: ffffffff81482a88 R15: ffffe8ffffd89e70 __cache_free mm/slab.c:3501 [inline] kmem_cache_free+0x15d/0x290 mm/slab.c:3760 __cleanup_sighand+0x58/0x70 kernel/fork.c:1487 __exit_signal kernel/exit.c:167 [inline] release_task.part.14+0xe7b/0x1bb0 kernel/exit.c:200 release_task kernel/exit.c:1155 [inline] wait_task_zombie kernel/exit.c:1155 [inline] wait_consider_task+0x2dd4/0x3bb0 kernel/exit.c:1382 do_wait_thread kernel/exit.c:1445 [inline] do_wait+0x49f/0xb90 kernel/exit.c:1516 kernel_wait4+0x247/0x3f0 kernel/exit.c:1659 __do_sys_wait4+0x137/0x150 kernel/exit.c:1671 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds..