syzkaller login: [ 30.704651] BUG: Bad rss-counter state mm:00000000e2d5a3f3 type:MM_FILEPAGES val:33 [ 30.705921] BUG: Bad rss-counter state mm:00000000e2d5a3f3 type:MM_ANONPAGES val:22 [ 30.865434] ================================================================== [ 30.866339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.867284] Read of size 8 at addr ffff888009746c20 by task sshd/220 [ 30.868237] [ 30.868458] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.869332] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.870322] Call Trace: [ 30.870648] <TASK> [ 30.870936] dump_stack_lvl+0x91/0xf0 [ 30.871435] print_report+0xcc/0x620 [ 30.871922] ? __virt_addr_valid+0x102/0x340 [ 30.872480] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.873103] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.873747] kasan_report+0xbe/0xf0 [ 30.874237] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.874886] vma_interval_tree_remove+0xc75/0xec0 [ 30.875515] vma_prepare+0xc54/0x11a0 [ 30.876033] __split_vma+0x5af/0x950 [ 30.876520] ? __pfx___split_vma+0x10/0x10 [ 30.877060] ? find_held_lock+0x2c/0x110 [ 30.877599] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.878186] ? lock_is_held_type+0x9f/0x120 [ 30.878744] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.879378] ? mtree_range_walk+0x632/0x900 [ 30.879964] ? mas_walk+0x5c7/0x7c0 [ 30.880466] do_vmi_munmap+0x1f1/0x2b0 [ 30.880983] mmap_region+0x1f9/0x2660 [ 30.881485] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.882016] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.882740] ? __pfx_lock_acquire+0x10/0x10 [ 30.883298] ? __pfx_mmap_region+0x10/0x10 [ 30.883843] ? security_mmap_addr+0x7d/0xa0 [ 30.884424] ? get_unmapped_area+0x1f5/0x3f0 [ 30.884995] do_mmap+0x854/0xf00 [ 30.885452] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.885966] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.886556] ksys_mmap_pgoff+0x3af/0x500 [ 30.887082] do_syscall_64+0x3f/0x90 [ 30.887575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.888262] RIP: 0033:0x7f90c02a4d82 [ 30.888741] 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 [ 30.890970] RSP: 002b:00007ffe32d54c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.891929] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90c02a4d82 [ 30.892812] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90bf6de000 [ 30.893695] RBP: 00007f90bf6de000 R08: 0000000000000009 R09: 0000000000001000 [ 30.894572] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd810a0ec0 [ 30.895463] R13: 00007ffe32d54c50 R14: 00007ffe32d54c80 R15: 00007ffe32d54fe0 [ 30.896383] </TASK> [ 30.896687] [ 30.896906] Allocated by task 213: [ 30.897353] kasan_save_stack+0x22/0x50 [ 30.897874] kasan_set_track+0x25/0x30 [ 30.898383] __kasan_slab_alloc+0x59/0x70 [ 30.898928] kmem_cache_alloc+0x16b/0x370 [ 30.899469] vm_area_dup+0x20/0x160 [ 30.899950] __split_vma+0x170/0x950 [ 30.900436] split_vma+0xc6/0x110 [ 30.900899] mprotect_fixup+0x8d2/0xb30 [ 30.901422] do_mprotect_pkey+0x87e/0xd40 [ 30.901964] __x64_sys_mprotect+0x78/0xc0 [ 30.902505] do_syscall_64+0x3f/0x90 [ 30.902994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.903666] [ 30.903888] Freed by task 213: [ 30.904327] kasan_save_stack+0x22/0x50 [ 30.904855] kasan_set_track+0x25/0x30 [ 30.905368] kasan_save_free_info+0x2b/0x50 [ 30.905912] __kasan_slab_free+0x10a/0x190 [ 30.906462] kmem_cache_free+0x10d/0x4d0 [ 30.906983] rcu_core+0x8c8/0x2860 [ 30.907446] __do_softirq+0x1b7/0x7d4 [ 30.907951] [ 30.908176] Last potentially related work creation: [ 30.908837] kasan_save_stack+0x22/0x50 [ 30.909362] __kasan_record_aux_stack+0x8e/0xa0 [ 30.909953] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.910643] remove_vma+0x139/0x170 [ 30.911111] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.911700] do_vmi_munmap+0x1f1/0x2b0 [ 30.912227] __vm_munmap+0x138/0x3a0 [ 30.912711] __x64_sys_munmap+0x59/0x80 [ 30.913237] do_syscall_64+0x3f/0x90 [ 30.913735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.914415] [ 30.914643] The buggy address belongs to the object at ffff888009746bc8 [ 30.914643] which belongs to the cache vm_area_struct of size 168 [ 30.916231] The buggy address is located 88 bytes inside of [ 30.916231] freed 168-byte region [ffff888009746bc8, ffff888009746c70) [ 30.917723] [ 30.917952] The buggy address belongs to the physical page: [ 30.918648] page:0000000034df82ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9746 [ 30.919804] memcg:ffff88801464c401 [ 30.920268] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.920953] page_type: 0xffffffff() [ 30.921426] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.922389] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801464c401 [ 30.923347] page dumped because: kasan: bad access detected [ 30.924061] [ 30.924283] Memory state around the buggy address: [ 30.924895] ffff888009746b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.925803] ffff888009746b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.926704] >ffff888009746c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.927603] ^ [ 30.928175] ffff888009746c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.929090] ffff888009746d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.930001] ================================================================== [ 30.930986] Disabling lock debugging due to kernel taint [ 32.846678] BUG: Bad rss-counter state mm:0000000090fba940 type:MM_FILEPAGES val:33 [ 32.847612] BUG: Bad rss-counter state mm:0000000090fba940 type:MM_ANONPAGES val:22 [ 33.340279] BUG: Bad rss-counter state mm:00000000b901a3ac type:MM_FILEPAGES val:33 [ 33.341359] BUG: Bad rss-counter state mm:00000000b901a3ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61218' (ECDSA) to the list of known hosts. 2023/06/21 07:03:38 fuzzer started 2023/06/21 07:03:38 dialing manager at localhost:36067 2023/06/21 07:03:38 checking machine... 2023/06/21 07:03:38 checking revisions... [ 34.091109] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:03:38 testing simple program... [ 34.141754] cgroup: Unknown subsys name 'net' [ 34.182797] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:03:38 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe6fa028a8 CR3=000000000e8a4000 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=2037333a33303a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a33303a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001d5eea5 RBX=ffff88800eaf7528 RCX=1ffff11001d5eeac RDX=1ffff110034dbdaf RSI=ffffffff87b89f80 RDI=ffff88801a6ded78 RBP=ffff88801a7822c9 RSP=ffff8880181f7bd0 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801a6ded78 R13=dffffc0000000000 R14=ffff88801a6ded58 R15=ffff88801a6ded10 RIP=ffffffff844d3e48 RFL=00000092 [--S-A--] 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 00007fe191e0b900 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=00007ffe0cade000 CR3=000000000f150000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000