syzkaller login: [ 38.168218] BUG: Bad rss-counter state mm:000000005ce47b2d type:MM_FILEPAGES val:33 [ 38.169257] BUG: Bad rss-counter state mm:000000005ce47b2d type:MM_ANONPAGES val:22 [ 38.367677] ================================================================== [ 38.368881] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.370115] Read of size 8 at addr ffff88800fbda798 by task sshd/221 [ 38.371102] [ 38.371382] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.372498] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.373756] Call Trace: [ 38.374199] [ 38.374564] dump_stack_lvl+0x91/0xf0 [ 38.375304] print_report+0xcc/0x620 [ 38.375958] ? __virt_addr_valid+0x102/0x340 [ 38.376572] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.377290] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.377996] kasan_report+0xbe/0xf0 [ 38.378523] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.379219] vma_interval_tree_remove+0xc75/0xec0 [ 38.379942] vma_prepare+0xc54/0x11a0 [ 38.380544] __split_vma+0x5af/0x950 [ 38.381108] ? __pfx___split_vma+0x10/0x10 [ 38.381906] ? find_held_lock+0x2c/0x110 [ 38.382691] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.383508] ? lock_is_held_type+0x9f/0x120 [ 38.384305] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.385198] ? mtree_range_walk+0x632/0x900 [ 38.386034] ? mas_walk+0x5c7/0x7c0 [ 38.386728] do_vmi_munmap+0x1f1/0x2b0 [ 38.387399] mmap_region+0x1f9/0x2660 [ 38.387962] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.388535] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.389330] ? __pfx_lock_acquire+0x10/0x10 [ 38.389970] ? __pfx_mmap_region+0x10/0x10 [ 38.390563] ? security_mmap_addr+0x7d/0xa0 [ 38.391164] ? get_unmapped_area+0x1f5/0x3f0 [ 38.391761] do_mmap+0x854/0xf00 [ 38.392259] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.392814] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.393429] ksys_mmap_pgoff+0x3af/0x500 [ 38.394039] do_syscall_64+0x3f/0x90 [ 38.394569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.395291] RIP: 0033:0x7f2d6811dd82 [ 38.395800] 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 [ 38.398168] RSP: 002b:00007ffd2b054e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.399185] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d6811dd82 [ 38.400128] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d67557000 [ 38.401069] RBP: 00007f2d67557000 R08: 0000000000000009 R09: 0000000000001000 [ 38.402042] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a78df1fec0 [ 38.403008] R13: 00007ffd2b054ea0 R14: 00007ffd2b054ed0 R15: 00007ffd2b055230 [ 38.403968] [ 38.404288] [ 38.404523] Allocated by task 214: [ 38.405005] kasan_save_stack+0x22/0x50 [ 38.405563] kasan_set_track+0x25/0x30 [ 38.406142] __kasan_slab_alloc+0x59/0x70 [ 38.406716] kmem_cache_alloc+0x16b/0x370 [ 38.407289] vm_area_dup+0x20/0x160 [ 38.407808] __split_vma+0x170/0x950 [ 38.408336] split_vma+0xc6/0x110 [ 38.408836] mprotect_fixup+0x8d2/0xb30 [ 38.409383] do_mprotect_pkey+0x87e/0xd40 [ 38.409982] __x64_sys_mprotect+0x78/0xc0 [ 38.410554] do_syscall_64+0x3f/0x90 [ 38.411078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.411779] [ 38.412040] Freed by task 214: [ 38.412460] kasan_save_stack+0x22/0x50 [ 38.413024] kasan_set_track+0x25/0x30 [ 38.413565] kasan_save_free_info+0x2b/0x50 [ 38.414170] __kasan_slab_free+0x10a/0x190 [ 38.414752] kmem_cache_free+0x10d/0x4d0 [ 38.415313] rcu_core+0x8c8/0x2860 [ 38.415804] __do_softirq+0x1b7/0x7d4 [ 38.416335] [ 38.416570] Last potentially related work creation: [ 38.417209] kasan_save_stack+0x22/0x50 [ 38.417751] __kasan_record_aux_stack+0x8e/0xa0 [ 38.418400] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.419114] remove_vma+0x139/0x170 [ 38.419604] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.420244] do_vmi_munmap+0x1f1/0x2b0 [ 38.420773] __vm_munmap+0x138/0x3a0 [ 38.421292] __x64_sys_munmap+0x59/0x80 [ 38.421847] do_syscall_64+0x3f/0x90 [ 38.422370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.423071] [ 38.423302] The buggy address belongs to the object at ffff88800fbda740 [ 38.423302] which belongs to the cache vm_area_struct of size 168 [ 38.424921] The buggy address is located 88 bytes inside of [ 38.424921] freed 168-byte region [ffff88800fbda740, ffff88800fbda7e8) [ 38.426464] [ 38.426699] The buggy address belongs to the physical page: [ 38.427418] page:000000009432d446 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbda [ 38.428601] memcg:ffff88801678c001 [ 38.429085] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.429833] page_type: 0xffffffff() [ 38.430353] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.431391] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801678c001 [ 38.432408] page dumped because: kasan: bad access detected [ 38.433182] [ 38.433429] Memory state around the buggy address: [ 38.434128] ffff88800fbda680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.435109] ffff88800fbda700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.436085] >ffff88800fbda780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.437070] ^ [ 38.437632] ffff88800fbda800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.438627] ffff88800fbda880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.439595] ================================================================== [ 38.441031] Disabling lock debugging due to kernel taint [ 40.621661] BUG: Bad rss-counter state mm:000000008a7833ae type:MM_FILEPAGES val:33 [ 40.622848] BUG: Bad rss-counter state mm:000000008a7833ae type:MM_ANONPAGES val:22 [ 41.037947] BUG: Bad rss-counter state mm:00000000c28d230e type:MM_FILEPAGES val:33 [ 41.039102] BUG: Bad rss-counter state mm:00000000c28d230e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44567' (ECDSA) to the list of known hosts. 2023/06/19 20:15:03 fuzzer started 2023/06/19 20:15:03 dialing manager at localhost:44161 2023/06/19 20:15:03 checking machine... 2023/06/19 20:15:03 checking revisions... [ 41.715012] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:15:03 testing simple program... [ 41.764805] cgroup: Unknown subsys name 'net' [ 41.805912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:14:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe854d33a8 CR3=0000000005482000 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=00007fb9c30015100000560ecfeda790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e3764c0 RCX=0000000000000002 RDX=ffff888016b251c0 RSI=ffffffff8164cd48 RDI=ffff888016b255b4 RBP=0000000000000000 RSP=ffff88800f027a48 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffff888015984000 R14=ffff88800e376000 R15=ffff888016b251c0 RIP=ffffffff8164cd58 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 00007fd6b8ae9700 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=00007fb30c5b9d50 CR3=000000000cb42000 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=2032303a35313a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a35313a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000