syzkaller login: [ 36.406945] BUG: Bad rss-counter state mm:000000007d46625a type:MM_FILEPAGES val:33 [ 36.408417] BUG: Bad rss-counter state mm:000000007d46625a type:MM_ANONPAGES val:22 [ 36.574280] ================================================================== [ 36.575181] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.576123] Read of size 8 at addr ffff88800ee746b0 by task sshd/221 [ 36.576929] [ 36.577147] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.578112] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.579092] Call Trace: [ 36.579413] [ 36.579698] dump_stack_lvl+0x91/0xf0 [ 36.580186] print_report+0xcc/0x620 [ 36.580714] ? __virt_addr_valid+0x102/0x340 [ 36.581265] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.581883] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.582501] kasan_report+0xbe/0xf0 [ 36.582983] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.583602] vma_interval_tree_remove+0xc75/0xec0 [ 36.584208] vma_prepare+0xc54/0x11a0 [ 36.584722] __split_vma+0x5af/0x950 [ 36.585203] ? __pfx___split_vma+0x10/0x10 [ 36.585738] ? find_held_lock+0x2c/0x110 [ 36.586255] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.586825] ? lock_is_held_type+0x9f/0x120 [ 36.587362] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.587971] ? mtree_range_walk+0x632/0x900 [ 36.588542] ? mas_walk+0x5c7/0x7c0 [ 36.589090] do_vmi_munmap+0x1f1/0x2b0 [ 36.589618] mmap_region+0x1f9/0x2660 [ 36.590110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.590645] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.591382] ? __pfx_lock_acquire+0x10/0x10 [ 36.591914] ? __pfx_mmap_region+0x10/0x10 [ 36.592444] ? security_mmap_addr+0x7d/0xa0 [ 36.593008] ? get_unmapped_area+0x1f5/0x3f0 [ 36.593554] do_mmap+0x854/0xf00 [ 36.593993] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.594487] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.595056] ksys_mmap_pgoff+0x3af/0x500 [ 36.595566] do_syscall_64+0x3f/0x90 [ 36.596046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.596725] RIP: 0033:0x7fe68efb5d82 [ 36.597185] 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 [ 36.599325] RSP: 002b:00007ffed1485868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.600231] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe68efb5d82 [ 36.601132] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe68e3ef000 [ 36.601997] RBP: 00007fe68e3ef000 R08: 0000000000000009 R09: 0000000000001000 [ 36.602843] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9b31b8ec0 [ 36.603699] R13: 00007ffed1485880 R14: 00007ffed14858b0 R15: 00007ffed1485c10 [ 36.604577] [ 36.604873] [ 36.605088] Allocated by task 213: [ 36.605522] kasan_save_stack+0x22/0x50 [ 36.606029] kasan_set_track+0x25/0x30 [ 36.606525] __kasan_slab_alloc+0x59/0x70 [ 36.607052] kmem_cache_alloc+0x16b/0x370 [ 36.607571] vm_area_dup+0x20/0x160 [ 36.608025] __split_vma+0x170/0x950 [ 36.608518] split_vma+0xc6/0x110 [ 36.608977] mprotect_fixup+0x8d2/0xb30 [ 36.609482] do_mprotect_pkey+0x87e/0xd40 [ 36.610018] __x64_sys_mprotect+0x78/0xc0 [ 36.610541] do_syscall_64+0x3f/0x90 [ 36.611012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.611658] [ 36.611873] Freed by task 213: [ 36.612269] kasan_save_stack+0x22/0x50 [ 36.612813] kasan_set_track+0x25/0x30 [ 36.613311] kasan_save_free_info+0x2b/0x50 [ 36.613845] __kasan_slab_free+0x10a/0x190 [ 36.614385] kmem_cache_free+0x10d/0x4d0 [ 36.614898] rcu_core+0x8c8/0x2860 [ 36.615345] __do_softirq+0x1b7/0x7d4 [ 36.615830] [ 36.616045] Last potentially related work creation: [ 36.616665] kasan_save_stack+0x22/0x50 [ 36.617175] __kasan_record_aux_stack+0x8e/0xa0 [ 36.617752] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.618400] remove_vma+0x139/0x170 [ 36.618851] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.619408] do_vmi_munmap+0x1f1/0x2b0 [ 36.619900] __vm_munmap+0x138/0x3a0 [ 36.620370] __x64_sys_munmap+0x59/0x80 [ 36.620917] do_syscall_64+0x3f/0x90 [ 36.621394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.622052] [ 36.622273] Second to last potentially related work creation: [ 36.622959] kasan_save_stack+0x22/0x50 [ 36.623466] __kasan_record_aux_stack+0x8e/0xa0 [ 36.624056] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.624734] remove_vma+0x139/0x170 [ 36.625194] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.625766] do_vmi_munmap+0x1f1/0x2b0 [ 36.626260] mmap_region+0x1f9/0x2660 [ 36.626736] do_mmap+0x854/0xf00 [ 36.627177] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.627680] ksys_mmap_pgoff+0x3af/0x500 [ 36.628191] do_syscall_64+0x3f/0x90 [ 36.628701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.629362] [ 36.629579] The buggy address belongs to the object at ffff88800ee74658 [ 36.629579] which belongs to the cache vm_area_struct of size 168 [ 36.631069] The buggy address is located 88 bytes inside of [ 36.631069] freed 168-byte region [ffff88800ee74658, ffff88800ee74700) [ 36.632510] [ 36.632751] The buggy address belongs to the physical page: [ 36.633424] page:00000000bbe855cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee74 [ 36.634520] memcg:ffff88800c656301 [ 36.634967] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.635677] page_type: 0xffffffff() [ 36.636137] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 36.637159] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c656301 [ 36.638110] page dumped because: kasan: bad access detected [ 36.638800] [ 36.639026] Memory state around the buggy address: [ 36.639643] ffff88800ee74580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.640559] ffff88800ee74600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 36.641483] >ffff88800ee74680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.642390] ^ [ 36.642996] ffff88800ee74700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 36.643888] ffff88800ee74780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 36.644795] ================================================================== [ 36.645917] Disabling lock debugging due to kernel taint [ 38.403230] BUG: Bad rss-counter state mm:000000001d496e47 type:MM_FILEPAGES val:32 [ 38.403997] BUG: Bad rss-counter state mm:000000001d496e47 type:MM_ANONPAGES val:22 [ 38.871600] BUG: Bad rss-counter state mm:000000002df26247 type:MM_FILEPAGES val:33 [ 38.872771] BUG: Bad rss-counter state mm:000000002df26247 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54060' (ECDSA) to the list of known hosts. 2023/06/20 06:20:04 fuzzer started 2023/06/20 06:20:04 dialing manager at localhost:44161 2023/06/20 06:20:04 checking machine... 2023/06/20 06:20:04 checking revisions... [ 39.610920] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:20:05 testing simple program... [ 39.655833] cgroup: Unknown subsys name 'net' [ 39.693768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:19:59 Registers: info registers vcpu 0 RAX=1ffff11002eb340a RBX=ffff88800d795080 RCX=ffffffff81828b20 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88801759a054 RBP=ffffed1001af2a12 RSP=ffff88800d83fcb0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff88801759a000 R13=dffffc0000000000 R14=ffff88800d795090 R15=0000000000000000 RIP=ffffffff81828b97 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 00007fa77fda6900 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=00007fffe65b7000 CR3=000000000ecf6000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f402312ff98 CR3=000000000e786000 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=2034303a30323a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a30323a3630203032 XMM08=00007fcdc401cf900000004f00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000