syzkaller login: [ 32.678861] BUG: Bad rss-counter state mm:00000000c604abe9 type:MM_FILEPAGES val:33 [ 32.679873] BUG: Bad rss-counter state mm:00000000c604abe9 type:MM_ANONPAGES val:22 [ 32.836541] ================================================================== [ 32.837477] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.838424] Read of size 8 at addr ffff88800f2ea4e0 by task sshd/220 [ 32.839197] [ 32.839415] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.840399] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.841404] Call Trace: [ 32.841723] [ 32.842013] dump_stack_lvl+0x91/0xf0 [ 32.842522] print_report+0xcc/0x620 [ 32.843010] ? __virt_addr_valid+0x102/0x340 [ 32.843568] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.844188] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.844848] kasan_report+0xbe/0xf0 [ 32.845327] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.845957] vma_interval_tree_remove+0xc75/0xec0 [ 32.846573] vma_prepare+0xc54/0x11a0 [ 32.847054] __split_vma+0x5af/0x950 [ 32.847532] ? __pfx___split_vma+0x10/0x10 [ 32.848057] ? find_held_lock+0x2c/0x110 [ 32.848581] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.849170] ? lock_is_held_type+0x9f/0x120 [ 32.849707] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.850332] ? mtree_range_walk+0x632/0x900 [ 32.850886] ? mas_walk+0x5c7/0x7c0 [ 32.851378] do_vmi_munmap+0x1f1/0x2b0 [ 32.851876] mmap_region+0x1f9/0x2660 [ 32.852380] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.852911] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.853629] ? __pfx_lock_acquire+0x10/0x10 [ 32.854175] ? __pfx_mmap_region+0x10/0x10 [ 32.854715] ? security_mmap_addr+0x7d/0xa0 [ 32.855255] ? get_unmapped_area+0x1f5/0x3f0 [ 32.855818] do_mmap+0x854/0xf00 [ 32.856260] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.856783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.857367] ksys_mmap_pgoff+0x3af/0x500 [ 32.857881] do_syscall_64+0x3f/0x90 [ 32.858368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.859020] RIP: 0033:0x7f1122b39d82 [ 32.859479] 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 [ 32.861638] RSP: 002b:00007ffd6da2b878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.862563] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1122b39d82 [ 32.863419] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1121f73000 [ 32.864269] RBP: 00007f1121f73000 R08: 0000000000000009 R09: 0000000000001000 [ 32.865129] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fec7680d90 [ 32.865967] R13: 00007ffd6da2b890 R14: 00007ffd6da2b8c0 R15: 00007ffd6da2bc20 [ 32.866819] [ 32.867112] [ 32.867329] Allocated by task 213: [ 32.867756] kasan_save_stack+0x22/0x50 [ 32.868263] kasan_set_track+0x25/0x30 [ 32.868769] __kasan_slab_alloc+0x59/0x70 [ 32.869290] kmem_cache_alloc+0x16b/0x370 [ 32.869805] vm_area_dup+0x20/0x160 [ 32.870271] __split_vma+0x170/0x950 [ 32.870734] split_vma+0xc6/0x110 [ 32.871172] mprotect_fixup+0x8d2/0xb30 [ 32.871671] do_mprotect_pkey+0x87e/0xd40 [ 32.872206] __x64_sys_mprotect+0x78/0xc0 [ 32.872740] do_syscall_64+0x3f/0x90 [ 32.873212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.873850] [ 32.874063] Freed by task 213: [ 32.874454] kasan_save_stack+0x22/0x50 [ 32.874955] kasan_set_track+0x25/0x30 [ 32.875461] kasan_save_free_info+0x2b/0x50 [ 32.875990] __kasan_slab_free+0x10a/0x190 [ 32.876520] kmem_cache_free+0x10d/0x4d0 [ 32.877049] rcu_core+0x8c8/0x2860 [ 32.877491] __do_softirq+0x1b7/0x7d4 [ 32.877966] [ 32.878181] Last potentially related work creation: [ 32.878762] kasan_save_stack+0x22/0x50 [ 32.879266] __kasan_record_aux_stack+0x8e/0xa0 [ 32.879846] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.880494] remove_vma+0x139/0x170 [ 32.880969] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.881583] do_vmi_munmap+0x1f1/0x2b0 [ 32.882081] __vm_munmap+0x138/0x3a0 [ 32.882553] __x64_sys_munmap+0x59/0x80 [ 32.883063] do_syscall_64+0x3f/0x90 [ 32.883550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.884214] [ 32.884432] The buggy address belongs to the object at ffff88800f2ea488 [ 32.884432] which belongs to the cache vm_area_struct of size 168 [ 32.885953] The buggy address is located 88 bytes inside of [ 32.885953] freed 168-byte region [ffff88800f2ea488, ffff88800f2ea530) [ 32.887380] [ 32.887602] The buggy address belongs to the physical page: [ 32.888279] page:00000000553ef12e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2ea [ 32.889393] memcg:ffff888016a40901 [ 32.889818] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.890466] page_type: 0xffffffff() [ 32.890922] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.891848] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a40901 [ 32.892756] page dumped because: kasan: bad access detected [ 32.893412] [ 32.893628] Memory state around the buggy address: [ 32.894210] ffff88800f2ea380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.895062] ffff88800f2ea400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.895929] >ffff88800f2ea480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.896799] ^ [ 32.897553] ffff88800f2ea500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.898404] ffff88800f2ea580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.899249] ================================================================== [ 32.900245] Disabling lock debugging due to kernel taint [ 35.369248] BUG: Bad rss-counter state mm:00000000a348a0e2 type:MM_FILEPAGES val:33 [ 35.370183] BUG: Bad rss-counter state mm:00000000a348a0e2 type:MM_ANONPAGES val:22 [ 35.821142] BUG: Bad rss-counter state mm:0000000093d3d980 type:MM_FILEPAGES val:33 [ 35.822038] BUG: Bad rss-counter state mm:0000000093d3d980 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51314' (ECDSA) to the list of known hosts. 2023/06/20 01:51:07 fuzzer started 2023/06/20 01:51:07 dialing manager at localhost:44161 2023/06/20 01:51:07 checking machine... 2023/06/20 01:51:07 checking revisions... [ 36.547360] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:51:08 testing simple program... [ 36.595455] cgroup: Unknown subsys name 'net' [ 36.657805] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:51:03 Registers: info registers vcpu 0 RAX=1ffff110028d8fa6 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffff815a755f RDI=ffffc9000064a059 RBP=ffff8880146c7d28 RSP=ffff8880146c7c60 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=ffff8880146c7d58 R13=ffff8880146c7d60 R14=ffff8880146c7d30 R15=ffffc9000064a058 RIP=ffffffff815a75a1 RFL=00000216 [----AP-] 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 00007f372f4eb900 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=00007fc98def2650 CR3=000000000d846000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=45b8aed7b2f4046000000000000ae988 XMM05=ec608d47bc4401930000000000134e28 XMM06=6475df1a7224f1ec0000000000133bc8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=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=00007f525f801338 CR3=000000000e472000 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=2037303a31353a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a31353a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000