syzkaller login: [ 38.734094] BUG: Bad rss-counter state mm:0000000054a3eb6e type:MM_FILEPAGES val:33 [ 38.735173] BUG: Bad rss-counter state mm:0000000054a3eb6e type:MM_ANONPAGES val:22 [ 38.862172] ================================================================== [ 38.863268] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.864418] Read of size 8 at addr ffff888008edded8 by task sshd/227 [ 38.865423] [ 38.865721] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.866998] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.868195] Call Trace: [ 38.868588] [ 38.868962] dump_stack_lvl+0x91/0xf0 [ 38.869339] print_report+0xcc/0x620 [ 38.869709] ? __virt_addr_valid+0x102/0x340 [ 38.870134] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.870599] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.871066] kasan_report+0xbe/0xf0 [ 38.871427] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.871897] vma_interval_tree_remove+0xc75/0xec0 [ 38.872356] vma_prepare+0xc54/0x11a0 [ 38.872726] __split_vma+0x5af/0x950 [ 38.873089] ? __pfx___split_vma+0x10/0x10 [ 38.873492] ? find_held_lock+0x2c/0x110 [ 38.873893] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.874328] ? lock_is_held_type+0x9f/0x120 [ 38.874739] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.875214] ? mtree_range_walk+0x632/0x900 [ 38.875638] ? mas_walk+0x5c7/0x7c0 [ 38.876004] do_vmi_munmap+0x1f1/0x2b0 [ 38.876378] mmap_region+0x1f9/0x2660 [ 38.876758] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.877150] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.877699] ? __pfx_lock_acquire+0x10/0x10 [ 38.878108] ? __pfx_mmap_region+0x10/0x10 [ 38.878512] ? security_mmap_addr+0x7d/0xa0 [ 38.878916] ? get_unmapped_area+0x1f5/0x3f0 [ 38.879333] do_mmap+0x854/0xf00 [ 38.879667] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.880039] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.880468] ksys_mmap_pgoff+0x3af/0x500 [ 38.880871] do_syscall_64+0x3f/0x90 [ 38.881235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.881729] RIP: 0033:0x7fe847ab9d82 [ 38.882082] 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 [ 38.883714] RSP: 002b:00007ffc226642b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.884406] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe847ab9d82 [ 38.885058] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe846ef3000 [ 38.885702] RBP: 00007fe846ef3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.886345] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563aeb33aec0 [ 38.886996] R13: 00007ffc226642d0 R14: 00007ffc22664300 R15: 00007ffc22664660 [ 38.887649] [ 38.887872] [ 38.888036] Allocated by task 220: [ 38.888362] kasan_save_stack+0x22/0x50 [ 38.888764] kasan_set_track+0x25/0x30 [ 38.889143] __kasan_slab_alloc+0x59/0x70 [ 38.889542] kmem_cache_alloc+0x16b/0x370 [ 38.889937] vm_area_dup+0x20/0x160 [ 38.890287] __split_vma+0x170/0x950 [ 38.890646] split_vma+0xc6/0x110 [ 38.890980] mprotect_fixup+0x8d2/0xb30 [ 38.891367] do_mprotect_pkey+0x87e/0xd40 [ 38.891764] __x64_sys_mprotect+0x78/0xc0 [ 38.892160] do_syscall_64+0x3f/0x90 [ 38.892522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.893040] [ 38.893204] Freed by task 204: [ 38.893507] kasan_save_stack+0x22/0x50 [ 38.893887] kasan_set_track+0x25/0x30 [ 38.894264] kasan_save_free_info+0x2b/0x50 [ 38.894676] __kasan_slab_free+0x10a/0x190 [ 38.895081] kmem_cache_free+0x10d/0x4d0 [ 38.895470] rcu_core+0x8c8/0x2860 [ 38.895812] __do_softirq+0x1b7/0x7d4 [ 38.896177] [ 38.896342] Last potentially related work creation: [ 38.896802] kasan_save_stack+0x22/0x50 [ 38.897188] __kasan_record_aux_stack+0x8e/0xa0 [ 38.897623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.898116] remove_vma+0x139/0x170 [ 38.898462] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.898886] do_vmi_munmap+0x1f1/0x2b0 [ 38.899256] __vm_munmap+0x138/0x3a0 [ 38.899614] __x64_sys_munmap+0x59/0x80 [ 38.899991] do_syscall_64+0x3f/0x90 [ 38.900356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.900861] [ 38.901028] The buggy address belongs to the object at ffff888008edde80 [ 38.901028] which belongs to the cache vm_area_struct of size 168 [ 38.902157] The buggy address is located 88 bytes inside of [ 38.902157] freed 168-byte region [ffff888008edde80, ffff888008eddf28) [ 38.903234] [ 38.903403] The buggy address belongs to the physical page: [ 38.903912] page:00000000d48bd4d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8edd [ 38.904746] memcg:ffff8880194fde01 [ 38.905072] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.905562] page_type: 0xffffffff() [ 38.905905] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.906607] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880194fde01 [ 38.907299] page dumped because: kasan: bad access detected [ 38.907806] [ 38.907971] Memory state around the buggy address: [ 38.908416] ffff888008eddd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.909081] ffff888008edde00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.909734] >ffff888008edde80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.910392] ^ [ 38.910954] ffff888008eddf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.911610] ffff888008eddf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.912267] ================================================================== [ 38.913176] Disabling lock debugging due to kernel taint [ 41.141153] BUG: Bad rss-counter state mm:00000000c4b9dda3 type:MM_FILEPAGES val:33 [ 41.142460] BUG: Bad rss-counter state mm:00000000c4b9dda3 type:MM_ANONPAGES val:22 [ 41.592149] BUG: Bad rss-counter state mm:000000007844b4d7 type:MM_FILEPAGES val:33 [ 41.593292] BUG: Bad rss-counter state mm:000000007844b4d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29425' (ECDSA) to the list of known hosts. 2023/06/20 14:31:44 fuzzer started 2023/06/20 14:31:44 dialing manager at localhost:36067 2023/06/20 14:31:44 checking machine... 2023/06/20 14:31:44 checking revisions... [ 42.342244] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:31:44 testing simple program... [ 42.401631] cgroup: Unknown subsys name 'net' [ 42.485741] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:31:44 Registers: info registers vcpu 0 RAX=0000000000020a5f RBX=0000000000000001 RCX=ffffffff81803032 RDX=0000000000020a69 RSI=0000000000008030 RDI=ffffffff86137b7e RBP=ffff8880168ff470 RSP=ffff8880168ff3a8 R8 =ffffffff86137b42 R9 =ffff8880168ff458 R10=0000000000038001 R11=0000000000020a5f R12=ffff8880168ff478 R13=ffff8880168ff460 R14=ffff8880168ff459 R15=ffff8880168ff418 RIP=ffffffff81130868 RFL=00000287 [--S--PC] 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 00007fbadb371700 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=00007f5b1606a618 CR3=0000000019c62000 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=2034343a31333a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a31333a3431203032 XMM08=3d656e696c646d632022656369767265 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=00007f2fa143cb00 CR3=000000000c5fa000 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=cf0a9b70ec46a184854240cf14c3db6f XMM02=000000000011be20eff9b2d0a8fce9cb XMM03=000000000011bef02c67c8bc2e329bc3 XMM04=d6212aebaa74bc5300000000000ae988 XMM05=2054eb2ef743654b0000000000132430 XMM06=e8008b1642ea3e600000000000131ab8 XMM07=e042d86d42eb936e0000000000122390 XMM08=e09a242c71d9dcf0000000000011bef0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000