------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at mm/slab.h:232 kmem_cache_free+0x0/0x10 include/trace/events/kmem.h:145 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.8.0-rc2-next-20200623-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+0x18f/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:231 __warn.cold+0x20/0x45 kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 exc_invalid_op+0xb1/0x120 arch/x86/kernel/traps.c:235 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563 RIP: 0010:kmem_cache_debug_flags mm/slab.h:232 [inline] RIP: 0010:cache_from_obj mm/slab.h:459 [inline] RIP: 0010:kmem_cache_free+0x0/0x10 mm/slab.c:3678 Code: 75 ca 48 c7 c2 90 b7 65 89 be 91 00 00 00 48 c7 c7 f6 f5 68 89 c6 05 db 78 f6 08 01 e8 8e 68 a7 ff eb a9 0f 1f 80 00 00 00 00 <0f> 0b 48 85 ff 74 05 e9 04 fe ff ff c3 0f 1f 00 41 57 48 8d 46 60 RSP: 0000:ffffffff89a07b88 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8880aa01f0e8 RCX: ffff8880aa01f490 RDX: ffffffff89a86580 RSI: ffff8880aa01f480 RDI: ffff8880aa00fe00 RBP: ffff8880aa01f4a8 R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880aa01f4b0 R13: ffff8880aa01f688 R14: ffff8880aa01f480 R15: ffffc90000000000 adjust_va_to_fit_type mm/vmalloc.c:980 [inline] __alloc_vmap_area mm/vmalloc.c:1096 [inline] alloc_vmap_area+0x142c/0x1de0 mm/vmalloc.c:1196 __get_vm_area_node+0x17b/0x3b0 mm/vmalloc.c:2060 __vmalloc_node_range mm/vmalloc.c:2484 [inline] __vmalloc_node+0xfe/0x1b0 mm/vmalloc.c:2532 __vmalloc_area_node+0x141/0x7a0 mm/vmalloc.c:2404 __vmalloc_node_range mm/vmalloc.c:2489 [inline] __vmalloc_node mm/vmalloc.c:2532 [inline] __vmalloc+0x114/0x1a0 mm/vmalloc.c:2546 alloc_large_system_hash+0x1c9/0x2e2 mm/page_alloc.c:8181 inode_init+0xab/0xbc fs/inode.c:2099 vfs_caches_init+0x104/0x11e fs/dcache.c:3231 start_kernel+0x985/0xa06 init/main.c:1025 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243