syzkaller login: [ 59.805799] BUG: Bad rss-counter state mm:00000000c08b0cf9 type:MM_FILEPAGES val:33 [ 59.807048] BUG: Bad rss-counter state mm:00000000c08b0cf9 type:MM_ANONPAGES val:22 [ 59.916258] ================================================================== [ 59.917095] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.917962] Read of size 8 at addr ffff88800ded74e0 by task sshd/219 [ 59.918796] [ 59.918999] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 59.919804] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.920721] Call Trace: [ 59.921009] [ 59.921276] dump_stack_lvl+0x91/0xf0 [ 59.921729] print_report+0xcc/0x620 [ 59.922172] ? __virt_addr_valid+0x102/0x340 [ 59.922684] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.923250] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.923826] kasan_report+0xbe/0xf0 [ 59.924297] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.924867] vma_interval_tree_remove+0xc75/0xec0 [ 59.925416] vma_prepare+0xc54/0x11a0 [ 59.925865] __split_vma+0x5af/0x950 [ 59.926303] ? __pfx___split_vma+0x10/0x10 [ 59.926798] ? find_held_lock+0x2c/0x110 [ 59.927297] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.927823] ? lock_is_held_type+0x9f/0x120 [ 59.928343] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.928904] ? mtree_range_walk+0x632/0x900 [ 59.929413] ? mas_walk+0x5c7/0x7c0 [ 59.929857] do_vmi_munmap+0x1f1/0x2b0 [ 59.930308] mmap_region+0x1f9/0x2660 [ 59.930754] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.931238] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.931915] ? __pfx_lock_acquire+0x10/0x10 [ 59.932416] ? __pfx_mmap_region+0x10/0x10 [ 59.932913] ? security_mmap_addr+0x7d/0xa0 [ 59.933404] ? get_unmapped_area+0x1f5/0x3f0 [ 59.933908] do_mmap+0x854/0xf00 [ 59.934287] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.934723] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.935226] ksys_mmap_pgoff+0x3af/0x500 [ 59.935682] do_syscall_64+0x3f/0x90 [ 59.936128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.936706] RIP: 0033:0x7f2ce34ecd82 [ 59.937121] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 59.939017] RSP: 002b:00007fffc7e799a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.939815] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ce34ecd82 [ 59.940551] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ce2926000 [ 59.941179] RBP: 00007f2ce2926000 R08: 0000000000000009 R09: 0000000000001000 [ 59.941815] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609cd6c3d90 [ 59.942450] R13: 00007fffc7e799c0 R14: 00007fffc7e799f0 R15: 00007fffc7e79d50 [ 59.943075] [ 59.943288] [ 59.943460] Allocated by task 212: [ 59.943783] kasan_save_stack+0x22/0x50 [ 59.944166] kasan_set_track+0x25/0x30 [ 59.944536] __kasan_slab_alloc+0x59/0x70 [ 59.944918] kmem_cache_alloc+0x16b/0x370 [ 59.945292] vm_area_dup+0x20/0x160 [ 59.945638] __split_vma+0x170/0x950 [ 59.945980] split_vma+0xc6/0x110 [ 59.946296] mprotect_fixup+0x8d2/0xb30 [ 59.946675] do_mprotect_pkey+0x87e/0xd40 [ 59.947058] __x64_sys_mprotect+0x78/0xc0 [ 59.947450] do_syscall_64+0x3f/0x90 [ 59.947807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.948622] [ 59.948899] Freed by task 212: [ 59.949392] kasan_save_stack+0x22/0x50 [ 59.950030] kasan_set_track+0x25/0x30 [ 59.950662] kasan_save_free_info+0x2b/0x50 [ 59.951344] __kasan_slab_free+0x10a/0x190 [ 59.952062] kmem_cache_free+0x10d/0x4d0 [ 59.952710] rcu_core+0x8c8/0x2860 [ 59.953274] __do_softirq+0x1b7/0x7d4 [ 59.953885] [ 59.954157] Last potentially related work creation: [ 59.954906] kasan_save_stack+0x22/0x50 [ 59.955548] __kasan_record_aux_stack+0x8e/0xa0 [ 59.956288] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.957097] remove_vma+0x139/0x170 [ 59.957680] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.958404] do_vmi_munmap+0x1f1/0x2b0 [ 59.959027] __vm_munmap+0x138/0x3a0 [ 59.959622] __x64_sys_munmap+0x59/0x80 [ 59.960271] do_syscall_64+0x3f/0x90 [ 59.960884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.961729] [ 59.962007] The buggy address belongs to the object at ffff88800ded7488 [ 59.962007] which belongs to the cache vm_area_struct of size 168 [ 59.963931] The buggy address is located 88 bytes inside of [ 59.963931] freed 168-byte region [ffff88800ded7488, ffff88800ded7530) [ 59.965511] [ 59.965752] The buggy address belongs to the physical page: [ 59.966485] page:0000000075c36b3b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xded7 [ 59.967702] memcg:ffff88800edc5701 [ 59.968190] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.968914] page_type: 0xffffffff() [ 59.969420] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 59.970444] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edc5701 [ 59.971451] page dumped because: kasan: bad access detected [ 59.972202] [ 59.972445] Memory state around the buggy address: [ 59.973106] ffff88800ded7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.974077] ffff88800ded7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 59.975048] >ffff88800ded7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.976031] ^ [ 59.976880] ffff88800ded7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 59.977845] ffff88800ded7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.978809] ================================================================== [ 59.980006] Disabling lock debugging due to kernel taint [ 61.999292] BUG: Bad rss-counter state mm:00000000cf76dc0c type:MM_FILEPAGES val:33 [ 62.000454] BUG: Bad rss-counter state mm:00000000cf76dc0c type:MM_ANONPAGES val:22 [ 62.557437] BUG: Bad rss-counter state mm:0000000082733b18 type:MM_FILEPAGES val:33 [ 62.558676] BUG: Bad rss-counter state mm:0000000082733b18 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18076' (ECDSA) to the list of known hosts. 2023/06/20 18:37:38 fuzzer started 2023/06/20 18:37:38 dialing manager at localhost:36067 2023/06/20 18:37:38 checking machine... 2023/06/20 18:37:38 checking revisions... [ 63.164705] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:37:38 testing simple program... [ 63.220689] cgroup: Unknown subsys name 'net' [ 63.254014] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:37:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018e2f7a0 RCX=0000000000000001 RDX=1ffff110031c5ef5 RSI=ffff888018e2ff10 RDI=ffff888018e2f7a8 RBP=ffff888018e2ff10 RSP=ffff888018e2f6f8 R8 =0000000000000001 R9 =ffff888018e2f7e0 R10=0000000000038001 R11=0000000000022457 R12=0000000000000008 R13=ffff888018e2f7e8 R14=ffff888018e2ff10 R15=ffff888018e2f7a0 RIP=ffffffff81130445 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f04232f5900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f04238ad0b0 CR3=0000000017f72000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f2c7526d028 CR3=000000000f3f6000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=3e877ed1cf81c6b8c34ea778d3a2c625 XMM02=000000000011a658eff9b2d0a8fce9cb XMM03=000000000011a7282c67c8bc2e329bc3 XMM04=17a6391b7ce51b3400000000000ae988 XMM05=273cb6086333722f0000000000132790 XMM06=806171799158d9670000000000131830 XMM07=e042d86d42eb936e0000000000121de8 XMM08=5d04590aac2b7ae5000000000011a728 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000