syzkaller login: [ 31.100818] BUG: Bad rss-counter state mm:00000000843887ca type:MM_FILEPAGES val:33 [ 31.102334] BUG: Bad rss-counter state mm:00000000843887ca type:MM_ANONPAGES val:22 [ 31.289950] ================================================================== [ 31.290976] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.292039] Read of size 8 at addr ffff88800dc0c3f8 by task sshd/219 [ 31.292975] [ 31.293220] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.294179] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.295305] Call Trace: [ 31.295663] [ 31.295980] dump_stack_lvl+0x91/0xf0 [ 31.296526] print_report+0xcc/0x620 [ 31.297086] ? __virt_addr_valid+0x102/0x340 [ 31.297704] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.298403] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.299121] kasan_report+0xbe/0xf0 [ 31.299652] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.300362] vma_interval_tree_remove+0xc75/0xec0 [ 31.301054] vma_prepare+0xc54/0x11a0 [ 31.301607] __split_vma+0x5af/0x950 [ 31.302148] ? __pfx___split_vma+0x10/0x10 [ 31.302754] ? find_held_lock+0x2c/0x110 [ 31.303369] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.304020] ? lock_is_held_type+0x9f/0x120 [ 31.304636] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.305339] ? mtree_range_walk+0x632/0x900 [ 31.305972] ? mas_walk+0x5c7/0x7c0 [ 31.306522] do_vmi_munmap+0x1f1/0x2b0 [ 31.307111] mmap_region+0x1f9/0x2660 [ 31.307671] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.308256] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.309070] ? __pfx_lock_acquire+0x10/0x10 [ 31.309679] ? __pfx_mmap_region+0x10/0x10 [ 31.310291] ? security_mmap_addr+0x7d/0xa0 [ 31.310918] ? get_unmapped_area+0x1f5/0x3f0 [ 31.311546] do_mmap+0x854/0xf00 [ 31.312043] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.312615] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.313264] ksys_mmap_pgoff+0x3af/0x500 [ 31.313844] do_syscall_64+0x3f/0x90 [ 31.314393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.315135] RIP: 0033:0x7faaaa160d82 [ 31.315654] 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 [ 31.318118] RSP: 002b:00007ffdd4d3f9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.319177] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faaaa160d82 [ 31.320148] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faaa959a000 [ 31.321116] RBP: 00007faaa959a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.322093] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dff424cd90 [ 31.323083] R13: 00007ffdd4d3fa10 R14: 00007ffdd4d3fa40 R15: 00007ffdd4d3fda0 [ 31.324064] [ 31.324398] [ 31.324648] Allocated by task 212: [ 31.325142] kasan_save_stack+0x22/0x50 [ 31.325720] kasan_set_track+0x25/0x30 [ 31.326278] __kasan_slab_alloc+0x59/0x70 [ 31.326885] kmem_cache_alloc+0x16b/0x370 [ 31.327469] vm_area_dup+0x20/0x160 [ 31.327990] __split_vma+0x170/0x950 [ 31.328518] split_vma+0xc6/0x110 [ 31.329015] mprotect_fixup+0x8d2/0xb30 [ 31.329587] do_mprotect_pkey+0x87e/0xd40 [ 31.330179] __x64_sys_mprotect+0x78/0xc0 [ 31.330767] do_syscall_64+0x3f/0x90 [ 31.331333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.332069] [ 31.332310] Freed by task 212: [ 31.332761] kasan_save_stack+0x22/0x50 [ 31.333406] kasan_set_track+0x25/0x30 [ 31.333972] kasan_save_free_info+0x2b/0x50 [ 31.334574] __kasan_slab_free+0x10a/0x190 [ 31.335193] kmem_cache_free+0x10d/0x4d0 [ 31.335764] rcu_core+0x8c8/0x2860 [ 31.336266] __do_softirq+0x1b7/0x7d4 [ 31.336805] [ 31.337050] Last potentially related work creation: [ 31.337717] kasan_save_stack+0x22/0x50 [ 31.338288] __kasan_record_aux_stack+0x8e/0xa0 [ 31.338966] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.339700] remove_vma+0x139/0x170 [ 31.340210] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.340841] do_vmi_munmap+0x1f1/0x2b0 [ 31.341391] __vm_munmap+0x138/0x3a0 [ 31.341924] __x64_sys_munmap+0x59/0x80 [ 31.342492] do_syscall_64+0x3f/0x90 [ 31.343039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.343765] [ 31.344008] The buggy address belongs to the object at ffff88800dc0c3a0 [ 31.344008] which belongs to the cache vm_area_struct of size 168 [ 31.345667] The buggy address is located 88 bytes inside of [ 31.345667] freed 168-byte region [ffff88800dc0c3a0, ffff88800dc0c448) [ 31.347265] [ 31.347510] The buggy address belongs to the physical page: [ 31.348261] page:00000000fe89e98f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc0c [ 31.349474] memcg:ffff888016a2c001 [ 31.349954] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.350677] page_type: 0xffffffff() [ 31.351203] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.352238] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a2c001 [ 31.353253] page dumped because: kasan: bad access detected [ 31.353999] [ 31.354240] Memory state around the buggy address: [ 31.354905] ffff88800dc0c280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.355868] ffff88800dc0c300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.356825] >ffff88800dc0c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.357785] ^ [ 31.358729] ffff88800dc0c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.359710] ffff88800dc0c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.360669] ================================================================== [ 31.361742] Disabling lock debugging due to kernel taint [ 34.126523] BUG: Bad rss-counter state mm:0000000037aa9f96 type:MM_FILEPAGES val:33 [ 34.127266] BUG: Bad rss-counter state mm:0000000037aa9f96 type:MM_ANONPAGES val:22 [ 34.671491] BUG: Bad rss-counter state mm:00000000262a824d type:MM_FILEPAGES val:33 [ 34.672790] BUG: Bad rss-counter state mm:00000000262a824d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65379' (ECDSA) to the list of known hosts. 2023/06/21 03:46:43 fuzzer started 2023/06/21 03:46:43 dialing manager at localhost:36067 2023/06/21 03:46:43 checking machine... 2023/06/21 03:46:43 checking revisions... [ 35.305916] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:46:43 testing simple program... [ 35.368285] cgroup: Unknown subsys name 'net' [ 35.415566] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:46:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015b98000 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff888015b983f4 RBP=00007fe0994d6014 RSP=ffff88806ce099c8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007fe0994d6014 R13=0000000000000000 R14=ffff888015b98000 R15=ffff88800daa5c80 RIP=ffffffff8135bd6b RFL=00000217 [----APC] 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 00007fe098e97700 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=00007f58ed0f50b0 CR3=0000000016be0000 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=36343a3330203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383435 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f52f3012380 CR3=0000000016be0000 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=2033343a36343a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a36343a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000