syzkaller login: [ 36.400739] BUG: Bad rss-counter state mm:00000000b4914f4f type:MM_FILEPAGES val:33 [ 36.401887] BUG: Bad rss-counter state mm:00000000b4914f4f type:MM_ANONPAGES val:22 [ 36.573397] ================================================================== [ 36.574303] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.575264] Read of size 8 at addr ffff88800e0406b0 by task sshd/220 [ 36.576041] [ 36.576358] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.577253] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.578243] Call Trace: [ 36.578582] [ 36.578869] dump_stack_lvl+0x91/0xf0 [ 36.579364] print_report+0xcc/0x620 [ 36.579854] ? __virt_addr_valid+0x102/0x340 [ 36.580407] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.581038] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.581678] kasan_report+0xbe/0xf0 [ 36.582168] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.582798] vma_interval_tree_remove+0xc75/0xec0 [ 36.583418] vma_prepare+0xc54/0x11a0 [ 36.583905] __split_vma+0x5af/0x950 [ 36.584383] ? __pfx___split_vma+0x10/0x10 [ 36.584911] ? find_held_lock+0x2c/0x110 [ 36.585454] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.586037] ? lock_is_held_type+0x9f/0x120 [ 36.586574] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.587189] ? mtree_range_walk+0x632/0x900 [ 36.587752] ? mas_walk+0x5c7/0x7c0 [ 36.588235] do_vmi_munmap+0x1f1/0x2b0 [ 36.588731] mmap_region+0x1f9/0x2660 [ 36.589233] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.589746] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.590460] ? __pfx_lock_acquire+0x10/0x10 [ 36.590998] ? __pfx_mmap_region+0x10/0x10 [ 36.591528] ? security_mmap_addr+0x7d/0xa0 [ 36.592065] ? get_unmapped_area+0x1f5/0x3f0 [ 36.592619] do_mmap+0x854/0xf00 [ 36.593063] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.593567] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.594136] ksys_mmap_pgoff+0x3af/0x500 [ 36.594646] do_syscall_64+0x3f/0x90 [ 36.595124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.595765] RIP: 0033:0x7f90df571d82 [ 36.596231] 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 [ 36.598472] RSP: 002b:00007fff65e38358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.599411] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90df571d82 [ 36.600291] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90de9ab000 [ 36.601188] RBP: 00007f90de9ab000 R08: 0000000000000009 R09: 0000000000001000 [ 36.602060] R10: 0000000000000812 R11: 0000000000000206 R12: 000055645c31eec0 [ 36.602932] R13: 00007fff65e38370 R14: 00007fff65e383a0 R15: 00007fff65e38700 [ 36.603829] [ 36.604139] [ 36.604363] Allocated by task 213: [ 36.604821] kasan_save_stack+0x22/0x50 [ 36.605372] kasan_set_track+0x25/0x30 [ 36.605898] __kasan_slab_alloc+0x59/0x70 [ 36.606459] kmem_cache_alloc+0x16b/0x370 [ 36.607012] vm_area_dup+0x20/0x160 [ 36.607494] __split_vma+0x170/0x950 [ 36.607993] split_vma+0xc6/0x110 [ 36.608461] mprotect_fixup+0x8d2/0xb30 [ 36.609010] do_mprotect_pkey+0x87e/0xd40 [ 36.609565] __x64_sys_mprotect+0x78/0xc0 [ 36.610125] do_syscall_64+0x3f/0x90 [ 36.610630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.611309] [ 36.611537] Freed by task 0: [ 36.611935] kasan_save_stack+0x22/0x50 [ 36.612443] kasan_set_track+0x25/0x30 [ 36.612934] kasan_save_free_info+0x2b/0x50 [ 36.613510] __kasan_slab_free+0x10a/0x190 [ 36.614061] kmem_cache_free+0x10d/0x4d0 [ 36.614589] rcu_core+0x8c8/0x2860 [ 36.615048] __do_softirq+0x1b7/0x7d4 [ 36.615540] [ 36.615761] Last potentially related work creation: [ 36.616371] kasan_save_stack+0x22/0x50 [ 36.616895] __kasan_record_aux_stack+0x8e/0xa0 [ 36.617504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.618171] remove_vma+0x139/0x170 [ 36.618638] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.619209] do_vmi_munmap+0x1f1/0x2b0 [ 36.619707] __vm_munmap+0x138/0x3a0 [ 36.620186] __x64_sys_munmap+0x59/0x80 [ 36.620702] do_syscall_64+0x3f/0x90 [ 36.621199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.621860] [ 36.622082] Second to last potentially related work creation: [ 36.622782] kasan_save_stack+0x22/0x50 [ 36.623305] __kasan_record_aux_stack+0x8e/0xa0 [ 36.623896] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.624564] remove_vma+0x139/0x170 [ 36.625044] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.625620] do_vmi_munmap+0x1f1/0x2b0 [ 36.626125] mmap_region+0x1f9/0x2660 [ 36.626619] do_mmap+0x854/0xf00 [ 36.627072] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.627579] ksys_mmap_pgoff+0x7d/0x500 [ 36.628084] do_syscall_64+0x3f/0x90 [ 36.628573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.629245] [ 36.629467] The buggy address belongs to the object at ffff88800e040658 [ 36.629467] which belongs to the cache vm_area_struct of size 168 [ 36.630989] The buggy address is located 88 bytes inside of [ 36.630989] freed 168-byte region [ffff88800e040658, ffff88800e040700) [ 36.632445] [ 36.632667] The buggy address belongs to the physical page: [ 36.633374] page:000000005811e70d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe040 [ 36.634492] memcg:ffff888009453b01 [ 36.634928] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.635602] page_type: 0xffffffff() [ 36.636064] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 36.637016] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009453b01 [ 36.637955] page dumped because: kasan: bad access detected [ 36.638640] [ 36.638861] Memory state around the buggy address: [ 36.639460] ffff88800e040580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.640341] ffff88800e040600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 36.641240] >ffff88800e040680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.642121] ^ [ 36.642722] ffff88800e040700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.643604] ffff88800e040780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.644478] ================================================================== [ 36.645513] Disabling lock debugging due to kernel taint [ 38.753790] BUG: Bad rss-counter state mm:00000000631ac04c type:MM_FILEPAGES val:33 [ 38.754943] BUG: Bad rss-counter state mm:00000000631ac04c type:MM_ANONPAGES val:22 [ 39.217109] BUG: Bad rss-counter state mm:0000000015638797 type:MM_FILEPAGES val:33 [ 39.218240] BUG: Bad rss-counter state mm:0000000015638797 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11886' (ECDSA) to the list of known hosts. 2023/06/19 14:33:34 fuzzer started 2023/06/19 14:33:35 dialing manager at localhost:44161 2023/06/19 14:33:35 checking machine... 2023/06/19 14:33:35 checking revisions... [ 39.963643] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:33:35 testing simple program... [ 40.030418] cgroup: Unknown subsys name 'net' [ 40.109711] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:33:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c1380 RSI=ffffffff84531da7 RDI=ffff88806ce09b6c RBP=ffff88806ce09c00 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e076c60 RIP=ffffffff813ad4f7 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 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=000056357f250000 CR3=0000000017e72000 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=2034333a33333a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a33333a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800ed6c000 RCX=ffff88800879fc80 RDX=ffffea000039d340 RSI=ffff8880100931b0 RDI=ffff88800879fdc0 RBP=0000000000000000 RSP=ffff88800faef8d8 R8 =ffff88800e74d740 R9 =0000000000000000 R10=ffffea00004024c0 R11=0000000080120001 R12=dffffc0000000000 R13=ffff88800faef918 R14=ffff88800879fc80 R15=ffff8880100931b0 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007fed2dd43900 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=00007fed2e2fb0b0 CR3=000000000efa4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000