syzkaller login: [ 70.027314] BUG: Bad rss-counter state mm:000000001b236ccb type:MM_FILEPAGES val:33 [ 70.028501] BUG: Bad rss-counter state mm:000000001b236ccb type:MM_ANONPAGES val:22 [ 70.230149] ================================================================== [ 70.231066] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.232001] Read of size 8 at addr ffff8880147f64e0 by task sshd/227 [ 70.232759] [ 70.233090] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 70.233942] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.234903] Call Trace: [ 70.235235] [ 70.235521] dump_stack_lvl+0x91/0xf0 [ 70.236007] print_report+0xcc/0x620 [ 70.236489] ? __virt_addr_valid+0x102/0x340 [ 70.237048] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.237662] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.238280] kasan_report+0xbe/0xf0 [ 70.238753] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.239374] vma_interval_tree_remove+0xc75/0xec0 [ 70.239982] vma_prepare+0xc54/0x11a0 [ 70.240476] __split_vma+0x5af/0x950 [ 70.240965] ? __pfx___split_vma+0x10/0x10 [ 70.241511] ? find_held_lock+0x2c/0x110 [ 70.242056] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.242638] ? lock_is_held_type+0x9f/0x120 [ 70.243196] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.243827] ? mtree_range_walk+0x632/0x900 [ 70.244400] ? mas_walk+0x5c7/0x7c0 [ 70.244904] do_vmi_munmap+0x1f1/0x2b0 [ 70.245416] mmap_region+0x1f9/0x2660 [ 70.245914] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.246445] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.247183] ? __pfx_lock_acquire+0x10/0x10 [ 70.247737] ? __pfx_mmap_region+0x10/0x10 [ 70.248285] ? security_mmap_addr+0x7d/0xa0 [ 70.248832] ? get_unmapped_area+0x1f5/0x3f0 [ 70.249404] do_mmap+0x854/0xf00 [ 70.249860] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.250376] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.250964] ksys_mmap_pgoff+0x3af/0x500 [ 70.251480] do_syscall_64+0x3f/0x90 [ 70.251970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.252629] RIP: 0033:0x7fbccf00ad82 [ 70.253118] 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 [ 70.255308] RSP: 002b:00007ffcd397db28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.256246] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbccf00ad82 [ 70.257118] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbcce444000 [ 70.257992] RBP: 00007fbcce444000 R08: 0000000000000009 R09: 0000000000001000 [ 70.258867] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b3def1ec0 [ 70.259734] R13: 00007ffcd397db40 R14: 00007ffcd397db70 R15: 00007ffcd397ded0 [ 70.260607] [ 70.260916] [ 70.261139] Allocated by task 218: [ 70.261581] kasan_save_stack+0x22/0x50 [ 70.262099] kasan_set_track+0x25/0x30 [ 70.262607] __kasan_slab_alloc+0x59/0x70 [ 70.263143] kmem_cache_alloc+0x16b/0x370 [ 70.263678] vm_area_dup+0x20/0x160 [ 70.264141] __split_vma+0x170/0x950 [ 70.264627] split_vma+0xc6/0x110 [ 70.265091] mprotect_fixup+0x8d2/0xb30 [ 70.265606] do_mprotect_pkey+0x87e/0xd40 [ 70.266139] __x64_sys_mprotect+0x78/0xc0 [ 70.266668] do_syscall_64+0x3f/0x90 [ 70.267152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.267814] [ 70.268032] Freed by task 218: [ 70.268436] kasan_save_stack+0x22/0x50 [ 70.268965] kasan_set_track+0x25/0x30 [ 70.269468] kasan_save_free_info+0x2b/0x50 [ 70.270017] __kasan_slab_free+0x10a/0x190 [ 70.270573] kmem_cache_free+0x10d/0x4d0 [ 70.271096] rcu_core+0x8c8/0x2860 [ 70.271553] __do_softirq+0x1b7/0x7d4 [ 70.272037] [ 70.272257] Last potentially related work creation: [ 70.272871] kasan_save_stack+0x22/0x50 [ 70.273385] __kasan_record_aux_stack+0x8e/0xa0 [ 70.273966] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.274629] remove_vma+0x139/0x170 [ 70.275095] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.275664] do_vmi_munmap+0x1f1/0x2b0 [ 70.276159] __vm_munmap+0x138/0x3a0 [ 70.276643] __x64_sys_munmap+0x59/0x80 [ 70.277168] do_syscall_64+0x3f/0x90 [ 70.277655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.278305] [ 70.278525] The buggy address belongs to the object at ffff8880147f6488 [ 70.278525] which belongs to the cache vm_area_struct of size 168 [ 70.280044] The buggy address is located 88 bytes inside of [ 70.280044] freed 168-byte region [ffff8880147f6488, ffff8880147f6530) [ 70.281503] [ 70.281729] The buggy address belongs to the physical page: [ 70.282412] page:00000000d8139761 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147f6 [ 70.283527] memcg:ffff88800dc5ec01 [ 70.283962] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.284624] page_type: 0xffffffff() [ 70.285111] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 70.286058] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc5ec01 [ 70.286987] page dumped because: kasan: bad access detected [ 70.287676] [ 70.287899] Memory state around the buggy address: [ 70.288486] ffff8880147f6380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 70.289367] ffff8880147f6400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 70.290234] >ffff8880147f6480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.291147] ^ [ 70.291966] ffff8880147f6500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 70.292894] ffff8880147f6580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.293808] ================================================================== [ 70.294923] Disabling lock debugging due to kernel taint [ 72.166875] BUG: Bad rss-counter state mm:0000000048830a0b type:MM_FILEPAGES val:33 [ 72.167961] BUG: Bad rss-counter state mm:0000000048830a0b type:MM_ANONPAGES val:22 [ 72.718469] BUG: Bad rss-counter state mm:0000000053051592 type:MM_FILEPAGES val:33 [ 72.719637] BUG: Bad rss-counter state mm:0000000053051592 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5430' (ECDSA) to the list of known hosts. 2023/06/19 21:45:52 fuzzer started 2023/06/19 21:45:52 dialing manager at localhost:44161 2023/06/19 21:45:52 checking machine... 2023/06/19 21:45:52 checking revisions... [ 73.358792] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:45:53 testing simple program... [ 73.412228] cgroup: Unknown subsys name 'net' [ 73.460983] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:45:48 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000058 RCX=0000000000000008 RDX=00007ffc50e88c1c RSI=00007ffc50e88c34 RDI=0000000000000040 RBP=00007ffc50e89d10 RSP=00007ffc50e88bd0 R8 =0000000000000000 R9 =0000000000000002 R10=00007ffc50e88c38 R11=0000000000000000 R12=0000000000000058 R13=00007ffc50e89c80 R14=0000000000000009 R15=00000000000000ec RIP=00007f5e94549417 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5e9403b900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc50e86000 CR3=000000000fbec000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f92d9464000 CR3=000000000db90000 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=2032353a35343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a35343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000