syzkaller login: [ 30.960564] BUG: Bad rss-counter state mm:0000000078d71a31 type:MM_FILEPAGES val:33 [ 30.961473] BUG: Bad rss-counter state mm:0000000078d71a31 type:MM_ANONPAGES val:22 [ 31.076761] ================================================================== [ 31.077443] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.078148] Read of size 8 at addr ffff888016950228 by task sshd/220 [ 31.078686] [ 31.078831] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.079428] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.080058] Call Trace: [ 31.080288] [ 31.080489] dump_stack_lvl+0x91/0xf0 [ 31.080990] print_report+0xcc/0x620 [ 31.081318] ? __virt_addr_valid+0x102/0x340 [ 31.081686] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.082137] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.082559] kasan_report+0xbe/0xf0 [ 31.082913] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.083350] vma_interval_tree_remove+0xc75/0xec0 [ 31.083754] vma_prepare+0xc54/0x11a0 [ 31.084082] __split_vma+0x5af/0x950 [ 31.084400] ? __pfx___split_vma+0x10/0x10 [ 31.084755] ? find_held_lock+0x2c/0x110 [ 31.085105] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.085491] ? lock_is_held_type+0x9f/0x120 [ 31.085925] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.086337] ? mtree_range_walk+0x632/0x900 [ 31.086714] ? mas_walk+0x5c7/0x7c0 [ 31.087022] do_vmi_munmap+0x1f1/0x2b0 [ 31.087346] mmap_region+0x1f9/0x2660 [ 31.087665] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.088005] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.088461] ? __pfx_lock_acquire+0x10/0x10 [ 31.088808] ? __pfx_mmap_region+0x10/0x10 [ 31.089146] ? security_mmap_addr+0x7d/0xa0 [ 31.089489] ? get_unmapped_area+0x1f5/0x3f0 [ 31.089878] do_mmap+0x854/0xf00 [ 31.090158] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.090487] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.090863] ksys_mmap_pgoff+0x3af/0x500 [ 31.091257] do_syscall_64+0x3f/0x90 [ 31.091611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.092075] RIP: 0033:0x7f715ecb4d82 [ 31.092409] 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 [ 31.093979] RSP: 002b:00007ffeb325e9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.094618] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f715ecb4d82 [ 31.095197] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f715e0ee000 [ 31.095765] RBP: 00007f715e0ee000 R08: 0000000000000009 R09: 0000000000001000 [ 31.096327] R10: 0000000000000812 R11: 0000000000000206 R12: 00005618d3badf70 [ 31.096893] R13: 00007ffeb325ea10 R14: 00007ffeb325ea40 R15: 00007ffeb325eda0 [ 31.097472] [ 31.097673] [ 31.097853] Allocated by task 213: [ 31.098133] kasan_save_stack+0x22/0x50 [ 31.098482] kasan_set_track+0x25/0x30 [ 31.098819] __kasan_slab_alloc+0x59/0x70 [ 31.099191] kmem_cache_alloc+0x16b/0x370 [ 31.099543] vm_area_dup+0x20/0x160 [ 31.099854] __split_vma+0x170/0x950 [ 31.100177] split_vma+0xc6/0x110 [ 31.100484] mprotect_fixup+0x8d2/0xb30 [ 31.100839] do_mprotect_pkey+0x87e/0xd40 [ 31.101206] __x64_sys_mprotect+0x78/0xc0 [ 31.101556] do_syscall_64+0x3f/0x90 [ 31.101933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.102382] [ 31.102529] Freed by task 213: [ 31.102786] kasan_save_stack+0x22/0x50 [ 31.103120] kasan_set_track+0x25/0x30 [ 31.103441] kasan_save_free_info+0x2b/0x50 [ 31.103805] __kasan_slab_free+0x10a/0x190 [ 31.104168] kmem_cache_free+0x10d/0x4d0 [ 31.104524] rcu_core+0x8c8/0x2860 [ 31.104825] __do_softirq+0x1b7/0x7d4 [ 31.105157] [ 31.105300] Last potentially related work creation: [ 31.105692] kasan_save_stack+0x22/0x50 [ 31.106065] __kasan_record_aux_stack+0x8e/0xa0 [ 31.106459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.106906] remove_vma+0x139/0x170 [ 31.107220] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.107612] do_vmi_munmap+0x1f1/0x2b0 [ 31.107936] __vm_munmap+0x138/0x3a0 [ 31.108237] __x64_sys_munmap+0x59/0x80 [ 31.108553] do_syscall_64+0x3f/0x90 [ 31.108855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.109267] [ 31.109406] The buggy address belongs to the object at ffff8880169501d0 [ 31.109406] which belongs to the cache vm_area_struct of size 168 [ 31.110385] The buggy address is located 88 bytes inside of [ 31.110385] freed 168-byte region [ffff8880169501d0, ffff888016950278) [ 31.111320] [ 31.111469] The buggy address belongs to the physical page: [ 31.111915] page:00000000de296471 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16950 [ 31.112689] memcg:ffff88800dfe3b01 [ 31.112984] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.113423] page_type: 0xffffffff() [ 31.113768] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.114400] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfe3b01 [ 31.115045] page dumped because: kasan: bad access detected [ 31.115513] [ 31.115663] Memory state around the buggy address: [ 31.116096] ffff888016950100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.116738] ffff888016950180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.117313] >ffff888016950200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.117913] ^ [ 31.118292] ffff888016950280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.118864] ffff888016950300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.119447] ================================================================== [ 31.120179] Disabling lock debugging due to kernel taint [ 33.057683] BUG: Bad rss-counter state mm:0000000033f6bc1b type:MM_FILEPAGES val:33 [ 33.058396] BUG: Bad rss-counter state mm:0000000033f6bc1b type:MM_ANONPAGES val:22 [ 33.424984] BUG: Bad rss-counter state mm:0000000091e9b2e6 type:MM_FILEPAGES val:33 [ 33.426089] BUG: Bad rss-counter state mm:0000000091e9b2e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46604' (ECDSA) to the list of known hosts. 2023/06/21 08:27:15 fuzzer started 2023/06/21 08:27:15 dialing manager at localhost:36067 2023/06/21 08:27:15 checking machine... 2023/06/21 08:27:15 checking revisions... [ 33.998147] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:27:15 testing simple program... [ 34.031002] cgroup: Unknown subsys name 'net' [ 34.084831] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:27:15 Registers: info registers vcpu 0 RAX=ffffffff81809add RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff81809add RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a88 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800d9d4500 RIP=ffffffff8453844a RFL=00000286 [--S--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=00007f271086ba10 CR3=0000000018f58000 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=2035313a37323a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a37323a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffffff85652c60 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffffffff85652c60 RBP=00007f93a76df366 RSP=ffff88801586f690 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007f93a76df366 R13=0000000000000000 R14=ffff8880103b9b40 R15=0000000000000001 RIP=ffffffff814c0871 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 00007f93a71ec900 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=00007ffe960ef000 CR3=000000000e750000 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=6720646572637465733a4d41503d706f 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