syzkaller login: [ 31.033678] BUG: Bad rss-counter state mm:000000000893bbb4 type:MM_FILEPAGES val:33 [ 31.034707] BUG: Bad rss-counter state mm:000000000893bbb4 type:MM_ANONPAGES val:22 [ 31.197268] ================================================================== [ 31.198185] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.199134] Read of size 8 at addr ffff8880097de310 by task sshd/220 [ 31.199910] [ 31.200135] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.201033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.202053] Call Trace: [ 31.202381] [ 31.202680] dump_stack_lvl+0x91/0xf0 [ 31.203180] print_report+0xcc/0x620 [ 31.203670] ? __virt_addr_valid+0x102/0x340 [ 31.204251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204871] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205506] kasan_report+0xbe/0xf0 [ 31.206002] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206633] vma_interval_tree_remove+0xc75/0xec0 [ 31.207264] vma_prepare+0xc54/0x11a0 [ 31.207757] __split_vma+0x5af/0x950 [ 31.208262] ? __pfx___split_vma+0x10/0x10 [ 31.208803] ? find_held_lock+0x2c/0x110 [ 31.209342] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.209918] ? lock_is_held_type+0x9f/0x120 [ 31.210475] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.211097] ? mtree_range_walk+0x632/0x900 [ 31.211664] ? mas_walk+0x5c7/0x7c0 [ 31.212161] do_vmi_munmap+0x1f1/0x2b0 [ 31.212664] mmap_region+0x1f9/0x2660 [ 31.213156] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.213676] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.214410] ? __pfx_lock_acquire+0x10/0x10 [ 31.214953] ? __pfx_mmap_region+0x10/0x10 [ 31.215492] ? security_mmap_addr+0x7d/0xa0 [ 31.216041] ? get_unmapped_area+0x1f5/0x3f0 [ 31.216599] do_mmap+0x854/0xf00 [ 31.217041] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.217547] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.218106] ksys_mmap_pgoff+0x3af/0x500 [ 31.218618] do_syscall_64+0x3f/0x90 [ 31.219102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219767] RIP: 0033:0x7f3dce309d82 [ 31.220250] 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 [ 31.222389] RSP: 002b:00007ffe1c028708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.223298] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3dce309d82 [ 31.224170] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3dcd743000 [ 31.225037] RBP: 00007f3dcd743000 R08: 0000000000000009 R09: 0000000000001000 [ 31.225900] R10: 0000000000000812 R11: 0000000000000206 R12: 00005583315e9f60 [ 31.226761] R13: 00007ffe1c028720 R14: 00007ffe1c028750 R15: 00007ffe1c028ab0 [ 31.227632] [ 31.227936] [ 31.228151] Allocated by task 213: [ 31.228586] kasan_save_stack+0x22/0x50 [ 31.229096] kasan_set_track+0x25/0x30 [ 31.229595] __kasan_slab_alloc+0x59/0x70 [ 31.230125] kmem_cache_alloc+0x16b/0x370 [ 31.230656] vm_area_dup+0x20/0x160 [ 31.231115] __split_vma+0x170/0x950 [ 31.231585] split_vma+0xc6/0x110 [ 31.232052] mprotect_fixup+0x8d2/0xb30 [ 31.232563] do_mprotect_pkey+0x87e/0xd40 [ 31.233099] __x64_sys_mprotect+0x78/0xc0 [ 31.233627] do_syscall_64+0x3f/0x90 [ 31.234114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234763] [ 31.234982] Freed by task 213: [ 31.235378] kasan_save_stack+0x22/0x50 [ 31.235895] kasan_set_track+0x25/0x30 [ 31.236397] kasan_save_free_info+0x2b/0x50 [ 31.236935] __kasan_slab_free+0x10a/0x190 [ 31.237469] kmem_cache_free+0x10d/0x4d0 [ 31.237983] rcu_core+0x8c8/0x2860 [ 31.238452] __do_softirq+0x1b7/0x7d4 [ 31.238944] [ 31.239163] Last potentially related work creation: [ 31.239758] kasan_save_stack+0x22/0x50 [ 31.240285] __kasan_record_aux_stack+0x8e/0xa0 [ 31.240864] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.241515] remove_vma+0x139/0x170 [ 31.241973] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.242547] do_vmi_munmap+0x1f1/0x2b0 [ 31.243043] __vm_munmap+0x138/0x3a0 [ 31.243514] __x64_sys_munmap+0x59/0x80 [ 31.244042] do_syscall_64+0x3f/0x90 [ 31.244521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245186] [ 31.245408] Second to last potentially related work creation: [ 31.246104] kasan_save_stack+0x22/0x50 [ 31.246609] __kasan_record_aux_stack+0x8e/0xa0 [ 31.247189] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.247838] remove_vma+0x139/0x170 [ 31.248311] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.248888] do_vmi_munmap+0x1f1/0x2b0 [ 31.249382] mmap_region+0x1f9/0x2660 [ 31.249876] do_mmap+0x854/0xf00 [ 31.250328] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.250830] ksys_mmap_pgoff+0x3af/0x500 [ 31.251337] do_syscall_64+0x3f/0x90 [ 31.251824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.252507] [ 31.252733] The buggy address belongs to the object at ffff8880097de2b8 [ 31.252733] which belongs to the cache vm_area_struct of size 168 [ 31.254217] The buggy address is located 88 bytes inside of [ 31.254217] freed 168-byte region [ffff8880097de2b8, ffff8880097de360) [ 31.255619] [ 31.255838] The buggy address belongs to the physical page: [ 31.256511] page:00000000006d4bec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97de [ 31.257599] memcg:ffff88800db84001 [ 31.258022] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.258727] page_type: 0xffffffff() [ 31.259184] raw: 0100000000000200 ffff8880087a0c80 ffffea000031c440 dead000000000003 [ 31.260116] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db84001 [ 31.261029] page dumped because: kasan: bad access detected [ 31.261714] [ 31.261934] Memory state around the buggy address: [ 31.262525] ffff8880097de200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.263401] ffff8880097de280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.264326] >ffff8880097de300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.265202] ^ [ 31.265681] ffff8880097de380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.266562] ffff8880097de400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.267445] ================================================================== [ 31.268730] Disabling lock debugging due to kernel taint [ 33.131861] BUG: Bad rss-counter state mm:0000000062ff9586 type:MM_FILEPAGES val:33 [ 33.132945] BUG: Bad rss-counter state mm:0000000062ff9586 type:MM_ANONPAGES val:22 [ 33.654372] BUG: Bad rss-counter state mm:000000003d70d885 type:MM_FILEPAGES val:33 [ 33.655596] BUG: Bad rss-counter state mm:000000003d70d885 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22798' (ECDSA) to the list of known hosts. 2023/06/20 12:16:19 fuzzer started 2023/06/20 12:16:20 dialing manager at localhost:36067 2023/06/20 12:16:20 checking machine... 2023/06/20 12:16:20 checking revisions... [ 34.276494] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:16:20 testing simple program... [ 34.321869] cgroup: Unknown subsys name 'net' [ 34.381387] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:16:19 Registers: info registers vcpu 0 RAX=ffffffff83641c44 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019aa7e01 RSI=ffff888019aa7e08 RDI=ffff888019aa7e08 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff863b40b6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008ab47 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888019aa7e10 R15=ffff88806ce09a98 RIP=ffffffff81131041 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 00007fee8b5de700 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=00007faea3aa10b0 CR3=0000000019b70000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732039313a3631 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383639 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=00007f3b1628f008 CR3=000000000d742000 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=787e3b5d11046bb0774886125c88c9de XMM02=000000000011bac8eff9b2d0a8fce9cb XMM03=000000000011bb982c67c8bc2e329bc3 XMM04=25b4f3a48c1b0ceb00000000000ae988 XMM05=19e9129bd510f23500000000001339c0 XMM06=71588d91d942f9670000000000132828 XMM07=e042d86d42eb936e0000000000122a88 XMM08=3ea01dc6b687b491000000000011bb98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000