syzkaller login: [ 29.955071] BUG: Bad rss-counter state mm:00000000c0f23aa2 type:MM_FILEPAGES val:33 [ 29.956093] BUG: Bad rss-counter state mm:00000000c0f23aa2 type:MM_ANONPAGES val:22 [ 30.116279] ================================================================== [ 30.117373] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.118510] Read of size 8 at addr ffff88801634b140 by task sshd/220 [ 30.119583] [ 30.119864] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.120885] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.121889] Call Trace: [ 30.122206] [ 30.122491] dump_stack_lvl+0x91/0xf0 [ 30.122996] print_report+0xcc/0x620 [ 30.123488] ? __virt_addr_valid+0x102/0x340 [ 30.124055] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.124682] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.125301] kasan_report+0xbe/0xf0 [ 30.125785] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.126406] vma_interval_tree_remove+0xc75/0xec0 [ 30.127016] vma_prepare+0xc54/0x11a0 [ 30.127499] __split_vma+0x5af/0x950 [ 30.127987] ? __pfx___split_vma+0x10/0x10 [ 30.128521] ? find_held_lock+0x2c/0x110 [ 30.129048] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.129618] ? lock_is_held_type+0x9f/0x120 [ 30.130160] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.130771] ? mtree_range_walk+0x632/0x900 [ 30.131322] ? mas_walk+0x5c7/0x7c0 [ 30.131822] do_vmi_munmap+0x1f1/0x2b0 [ 30.132314] mmap_region+0x1f9/0x2660 [ 30.132809] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.133323] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.134058] ? __pfx_lock_acquire+0x10/0x10 [ 30.134617] ? __pfx_mmap_region+0x10/0x10 [ 30.135154] ? security_mmap_addr+0x7d/0xa0 [ 30.135693] ? get_unmapped_area+0x1f5/0x3f0 [ 30.136264] do_mmap+0x854/0xf00 [ 30.136722] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.137227] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.137817] ksys_mmap_pgoff+0x3af/0x500 [ 30.138331] do_syscall_64+0x3f/0x90 [ 30.138813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.139480] RIP: 0033:0x7f8523aa9d82 [ 30.139958] 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 [ 30.142138] RSP: 002b:00007fff524fe018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.143052] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8523aa9d82 [ 30.143925] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8522ee3000 [ 30.144769] RBP: 00007f8522ee3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.145636] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558eb0d26ec0 [ 30.146480] R13: 00007fff524fe030 R14: 00007fff524fe060 R15: 00007fff524fe3c0 [ 30.147345] [ 30.147641] [ 30.147868] Allocated by task 213: [ 30.148299] kasan_save_stack+0x22/0x50 [ 30.148810] kasan_set_track+0x25/0x30 [ 30.149310] __kasan_slab_alloc+0x59/0x70 [ 30.149839] kmem_cache_alloc+0x16b/0x370 [ 30.150362] vm_area_dup+0x20/0x160 [ 30.150830] __split_vma+0x170/0x950 [ 30.151306] split_vma+0xc6/0x110 [ 30.151763] mprotect_fixup+0x8d2/0xb30 [ 30.152294] do_mprotect_pkey+0x87e/0xd40 [ 30.152847] __x64_sys_mprotect+0x78/0xc0 [ 30.153397] do_syscall_64+0x3f/0x90 [ 30.153876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.154513] [ 30.154729] Freed by task 213: [ 30.155117] kasan_save_stack+0x22/0x50 [ 30.155624] kasan_set_track+0x25/0x30 [ 30.156117] kasan_save_free_info+0x2b/0x50 [ 30.156644] __kasan_slab_free+0x10a/0x190 [ 30.157178] kmem_cache_free+0x10d/0x4d0 [ 30.157692] rcu_core+0x8c8/0x2860 [ 30.158136] __do_softirq+0x1b7/0x7d4 [ 30.158614] [ 30.158827] Last potentially related work creation: [ 30.159414] kasan_save_stack+0x22/0x50 [ 30.159967] __kasan_record_aux_stack+0x8e/0xa0 [ 30.160552] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.161195] remove_vma+0x139/0x170 [ 30.161649] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.162207] do_vmi_munmap+0x1f1/0x2b0 [ 30.162693] __vm_munmap+0x138/0x3a0 [ 30.163157] __x64_sys_munmap+0x59/0x80 [ 30.163655] do_syscall_64+0x3f/0x90 [ 30.164147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.164785] [ 30.165006] The buggy address belongs to the object at ffff88801634b0e8 [ 30.165006] which belongs to the cache vm_area_struct of size 168 [ 30.166461] The buggy address is located 88 bytes inside of [ 30.166461] freed 168-byte region [ffff88801634b0e8, ffff88801634b190) [ 30.167875] [ 30.168096] The buggy address belongs to the physical page: [ 30.168761] page:0000000051a75b2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1634b [ 30.169854] memcg:ffff88800c781101 [ 30.170283] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.170939] page_type: 0xffffffff() [ 30.171384] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.172307] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c781101 [ 30.173203] page dumped because: kasan: bad access detected [ 30.173869] [ 30.174086] Memory state around the buggy address: [ 30.174663] ffff88801634b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.175516] ffff88801634b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.176375] >ffff88801634b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.177229] ^ [ 30.177874] ffff88801634b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.178758] ffff88801634b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.179602] ================================================================== [ 30.180536] Disabling lock debugging due to kernel taint [ 32.118704] BUG: Bad rss-counter state mm:0000000089c80cfe type:MM_FILEPAGES val:33 [ 32.119706] BUG: Bad rss-counter state mm:0000000089c80cfe type:MM_ANONPAGES val:22 [ 32.699296] BUG: Bad rss-counter state mm:00000000a6934639 type:MM_FILEPAGES val:33 [ 32.700474] BUG: Bad rss-counter state mm:00000000a6934639 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43612' (ECDSA) to the list of known hosts. 2023/06/21 07:13:14 fuzzer started 2023/06/21 07:13:15 dialing manager at localhost:36067 2023/06/21 07:13:15 checking machine... 2023/06/21 07:13:15 checking revisions... [ 33.296734] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:13:15 testing simple program... [ 33.355657] cgroup: Unknown subsys name 'net' [ 33.392151] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:13:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135a RSI=ffffffff8460144a RDI=ffff88806ce09b40 RBP=ffff88806ce09b10 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e8f1c00 RIP=ffffffff813ad47f RFL=00000282 [--S----] 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=00007fc06bc2bdd0 CR3=000000000ecc0000 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=2034313a33313a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a33313a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000004010 RCX=ffffffff81740fd9 RDX=ffff8880167cd1c0 RSI=00007ffffffff000 RDI=00007f5347caa000 RBP=00007ffffffff000 RSP=ffff88801cd87dd0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007f5347caa000 R13=ffff88801cd87e70 R14=ffff8880163f5340 R15=ffff88801cd87e50 RIP=ffffffff814c0378 RFL=00000293 [--S-A-C] 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 00007f5347ce4900 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=00007f5347cae008 CR3=0000000018e70000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000