syzkaller login: [ 31.134792] BUG: Bad rss-counter state mm:000000004c6a23e5 type:MM_FILEPAGES val:33 [ 31.136024] BUG: Bad rss-counter state mm:000000004c6a23e5 type:MM_ANONPAGES val:22 [ 31.231418] ================================================================== [ 31.232581] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.233783] Read of size 8 at addr ffff8880101935c8 by task sshd/220 [ 31.234769] [ 31.235054] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.236201] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.237462] Call Trace: [ 31.237870] [ 31.238236] dump_stack_lvl+0x91/0xf0 [ 31.238862] print_report+0xcc/0x620 [ 31.239484] ? __virt_addr_valid+0x102/0x340 [ 31.240220] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.241018] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.241807] kasan_report+0xbe/0xf0 [ 31.242415] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.243217] vma_interval_tree_remove+0xc75/0xec0 [ 31.244003] vma_prepare+0xc54/0x11a0 [ 31.244622] __split_vma+0x5af/0x950 [ 31.245232] ? __pfx___split_vma+0x10/0x10 [ 31.245913] ? find_held_lock+0x2c/0x110 [ 31.246589] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.247307] ? lock_is_held_type+0x9f/0x120 [ 31.248037] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.248836] ? mtree_range_walk+0x632/0x900 [ 31.249575] ? mas_walk+0x5c7/0x7c0 [ 31.250200] do_vmi_munmap+0x1f1/0x2b0 [ 31.250865] mmap_region+0x1f9/0x2660 [ 31.251512] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.252203] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.253129] ? __pfx_lock_acquire+0x10/0x10 [ 31.253811] ? __pfx_mmap_region+0x10/0x10 [ 31.254501] ? security_mmap_addr+0x7d/0xa0 [ 31.255220] ? get_unmapped_area+0x1f5/0x3f0 [ 31.255974] do_mmap+0x854/0xf00 [ 31.256563] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.257216] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.257942] ksys_mmap_pgoff+0x3af/0x500 [ 31.258600] do_syscall_64+0x3f/0x90 [ 31.259230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.260054] RIP: 0033:0x7ff9bb760d82 [ 31.260549] 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 [ 31.262721] RSP: 002b:00007ffdbcf30928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.263649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff9bb760d82 [ 31.264529] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff9bab9a000 [ 31.265393] RBP: 00007ff9bab9a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.266267] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559456020f70 [ 31.267117] R13: 00007ffdbcf30940 R14: 00007ffdbcf30970 R15: 00007ffdbcf30cd0 [ 31.268029] [ 31.268334] [ 31.268551] Allocated by task 213: [ 31.268983] kasan_save_stack+0x22/0x50 [ 31.269501] kasan_set_track+0x25/0x30 [ 31.269991] __kasan_slab_alloc+0x59/0x70 [ 31.270539] kmem_cache_alloc+0x16b/0x370 [ 31.271055] vm_area_dup+0x20/0x160 [ 31.271533] __split_vma+0x170/0x950 [ 31.272020] split_vma+0xc6/0x110 [ 31.272470] mprotect_fixup+0x8d2/0xb30 [ 31.272972] do_mprotect_pkey+0x87e/0xd40 [ 31.273503] __x64_sys_mprotect+0x78/0xc0 [ 31.274040] do_syscall_64+0x3f/0x90 [ 31.274530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.275192] [ 31.275409] Freed by task 213: [ 31.275802] kasan_save_stack+0x22/0x50 [ 31.276360] kasan_set_track+0x25/0x30 [ 31.276858] kasan_save_free_info+0x2b/0x50 [ 31.277402] __kasan_slab_free+0x10a/0x190 [ 31.277931] kmem_cache_free+0x10d/0x4d0 [ 31.278458] rcu_core+0x8c8/0x2860 [ 31.278901] __do_softirq+0x1b7/0x7d4 [ 31.279392] [ 31.279611] Last potentially related work creation: [ 31.280233] kasan_save_stack+0x22/0x50 [ 31.280747] __kasan_record_aux_stack+0x8e/0xa0 [ 31.281358] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.282010] remove_vma+0x139/0x170 [ 31.282484] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.283040] do_vmi_munmap+0x1f1/0x2b0 [ 31.283525] __vm_munmap+0x138/0x3a0 [ 31.283998] __x64_sys_munmap+0x59/0x80 [ 31.284494] do_syscall_64+0x3f/0x90 [ 31.284966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.285613] [ 31.285831] Second to last potentially related work creation: [ 31.286527] kasan_save_stack+0x22/0x50 [ 31.287029] __kasan_record_aux_stack+0x8e/0xa0 [ 31.287599] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.288258] remove_vma+0x139/0x170 [ 31.288715] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.289297] do_vmi_munmap+0x1f1/0x2b0 [ 31.289776] mmap_region+0x1f9/0x2660 [ 31.290250] do_mmap+0x854/0xf00 [ 31.290681] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.291164] ksys_mmap_pgoff+0x7d/0x500 [ 31.291661] do_syscall_64+0x3f/0x90 [ 31.292141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.292786] [ 31.293005] The buggy address belongs to the object at ffff888010193570 [ 31.293005] which belongs to the cache vm_area_struct of size 168 [ 31.294483] The buggy address is located 88 bytes inside of [ 31.294483] freed 168-byte region [ffff888010193570, ffff888010193618) [ 31.295894] [ 31.296110] The buggy address belongs to the physical page: [ 31.296769] page:000000001fbe77b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10193 [ 31.297858] memcg:ffff88800d627b01 [ 31.298291] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.298932] page_type: 0xffffffff() [ 31.299378] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.300310] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d627b01 [ 31.301211] page dumped because: kasan: bad access detected [ 31.301869] [ 31.302081] Memory state around the buggy address: [ 31.302658] ffff888010193480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.303510] ffff888010193500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.304376] >ffff888010193580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.305219] ^ [ 31.305883] ffff888010193600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.306725] ffff888010193680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.307564] ================================================================== [ 31.308905] Disabling lock debugging due to kernel taint [ 33.865241] BUG: Bad rss-counter state mm:00000000b6411b27 type:MM_FILEPAGES val:33 [ 33.866903] BUG: Bad rss-counter state mm:00000000b6411b27 type:MM_ANONPAGES val:22 [ 34.476895] BUG: Bad rss-counter state mm:0000000090ef4b88 type:MM_FILEPAGES val:33 [ 34.478113] BUG: Bad rss-counter state mm:0000000090ef4b88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21633' (ECDSA) to the list of known hosts. 2023/06/21 02:58:36 fuzzer started 2023/06/21 02:58:37 dialing manager at localhost:36067 2023/06/21 02:58:37 checking machine... 2023/06/21 02:58:37 checking revisions... [ 35.122495] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:58:37 testing simple program... [ 35.175004] cgroup: Unknown subsys name 'net' [ 35.224542] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:58:36 Registers: info registers vcpu 0 RAX=1ffff110028c4efd RBX=000000000000000c RCX=0000000000000001 RDX=0000000000000800 RSI=000000000000000d RDI=ffff8880146277e8 RBP=dffffc0000000000 RSP=ffff8880146276d8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000d R13=0000000000000800 R14=ffff888014627788 R15=ffff8880145d1980 RIP=ffffffff813ad61a 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 00007f9d82906700 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=00007f58c5a33650 CR3=0000000009970000 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=2036333a38353a3230203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a38353a3230203132 XMM08=69767265733d7373616c63742030733a 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=00007f80f49e1040 CR3=000000000d832000 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=2a375b0359df5e81784aedddc715beff XMM02=000000000011a578ec2efd57dc4c00df XMM03=00000000001219e0f4c3d89a61834f65 XMM04=1a31aac16dc33dbb00000000000ae988 XMM05=19e9129bd510f2350000000000132b30 XMM06=c91737e8b6594b330000000000131998 XMM07=e042d86d42eb936e0000000000121c60 XMM08=f4c3d89a61834f65000000000011a5d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000