syzkaller login: [ 38.786421] BUG: Bad rss-counter state mm:00000000c09ab370 type:MM_FILEPAGES val:33 [ 38.787187] BUG: Bad rss-counter state mm:00000000c09ab370 type:MM_ANONPAGES val:22 [ 38.917789] ================================================================== [ 38.918703] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.919512] Read of size 8 at addr ffff88800e01b058 by task sshd/219 [ 38.920187] [ 38.920385] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.921140] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.922187] Call Trace: [ 38.922423] [ 38.922669] dump_stack_lvl+0x91/0xf0 [ 38.923009] print_report+0xcc/0x620 [ 38.923364] ? __virt_addr_valid+0x102/0x340 [ 38.923747] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.924163] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.924607] kasan_report+0xbe/0xf0 [ 38.925005] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.925484] vma_interval_tree_remove+0xc75/0xec0 [ 38.925919] vma_prepare+0xc54/0x11a0 [ 38.926262] __split_vma+0x5af/0x950 [ 38.926580] ? __pfx___split_vma+0x10/0x10 [ 38.927025] ? find_held_lock+0x2c/0x110 [ 38.927397] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.927804] ? lock_is_held_type+0x9f/0x120 [ 38.928201] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.928617] ? mtree_range_walk+0x632/0x900 [ 38.929002] ? mas_walk+0x5c7/0x7c0 [ 38.929327] do_vmi_munmap+0x1f1/0x2b0 [ 38.929756] mmap_region+0x1f9/0x2660 [ 38.930172] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.930598] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.931185] ? __pfx_lock_acquire+0x10/0x10 [ 38.931597] ? __pfx_mmap_region+0x10/0x10 [ 38.931970] ? security_mmap_addr+0x7d/0xa0 [ 38.932394] ? get_unmapped_area+0x1f5/0x3f0 [ 38.932788] do_mmap+0x854/0xf00 [ 38.933100] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.933512] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.933970] ksys_mmap_pgoff+0x3af/0x500 [ 38.934341] do_syscall_64+0x3f/0x90 [ 38.934705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935145] RIP: 0033:0x7f7f05b34d82 [ 38.935439] 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 [ 38.936849] RSP: 002b:00007ffef11cb518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.937457] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f05b34d82 [ 38.938037] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f04f6e000 [ 38.938602] RBP: 00007f7f04f6e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.939208] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d416e1f60 [ 38.939763] R13: 00007ffef11cb530 R14: 00007ffef11cb560 R15: 00007ffef11cb8c0 [ 38.940340] [ 38.940540] [ 38.940690] Allocated by task 212: [ 38.940986] kasan_save_stack+0x22/0x50 [ 38.941324] kasan_set_track+0x25/0x30 [ 38.941658] __kasan_slab_alloc+0x59/0x70 [ 38.942015] kmem_cache_alloc+0x16b/0x370 [ 38.942368] vm_area_dup+0x20/0x160 [ 38.942714] __split_vma+0x170/0x950 [ 38.943034] split_vma+0xc6/0x110 [ 38.943344] mprotect_fixup+0x8d2/0xb30 [ 38.943681] do_mprotect_pkey+0x87e/0xd40 [ 38.944014] __x64_sys_mprotect+0x78/0xc0 [ 38.944354] do_syscall_64+0x3f/0x90 [ 38.944680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945118] [ 38.945259] Freed by task 203: [ 38.945522] kasan_save_stack+0x22/0x50 [ 38.945857] kasan_set_track+0x25/0x30 [ 38.946186] kasan_save_free_info+0x2b/0x50 [ 38.946536] __kasan_slab_free+0x10a/0x190 [ 38.946943] kmem_cache_free+0x10d/0x4d0 [ 38.947284] rcu_core+0x8c8/0x2860 [ 38.947583] __do_softirq+0x1b7/0x7d4 [ 38.947910] [ 38.948061] Last potentially related work creation: [ 38.948460] kasan_save_stack+0x22/0x50 [ 38.948785] __kasan_record_aux_stack+0x8e/0xa0 [ 38.949159] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.949598] remove_vma+0x139/0x170 [ 38.949911] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.950258] do_vmi_munmap+0x1f1/0x2b0 [ 38.950573] __vm_munmap+0x138/0x3a0 [ 38.950918] __x64_sys_munmap+0x59/0x80 [ 38.951266] do_syscall_64+0x3f/0x90 [ 38.951588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.952017] [ 38.952163] The buggy address belongs to the object at ffff88800e01b000 [ 38.952163] which belongs to the cache vm_area_struct of size 168 [ 38.953128] The buggy address is located 88 bytes inside of [ 38.953128] freed 168-byte region [ffff88800e01b000, ffff88800e01b0a8) [ 38.954057] [ 38.954198] The buggy address belongs to the physical page: [ 38.954715] page:00000000ccdc0e54 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe01b [ 38.955325] memcg:ffff88800df0e901 [ 38.955556] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.955930] page_type: 0xffffffff() [ 38.956170] raw: 0100000000000200 ffff8880087a0c80 ffffea0000317580 dead000000000003 [ 38.956662] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df0e901 [ 38.957159] page dumped because: kasan: bad access detected [ 38.957513] [ 38.957628] Memory state around the buggy address: [ 38.957940] ffff88800e01af00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 38.958397] ffff88800e01af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.958891] >ffff88800e01b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.959345] ^ [ 38.959738] ffff88800e01b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.960197] ffff88800e01b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.960653] ================================================================== [ 38.961183] Disabling lock debugging due to kernel taint [ 41.090941] BUG: Bad rss-counter state mm:00000000686f7294 type:MM_FILEPAGES val:33 [ 41.091635] BUG: Bad rss-counter state mm:00000000686f7294 type:MM_ANONPAGES val:22 [ 41.456654] BUG: Bad rss-counter state mm:0000000062dbfe5f type:MM_FILEPAGES val:33 [ 41.457385] BUG: Bad rss-counter state mm:0000000062dbfe5f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16515' (ECDSA) to the list of known hosts. 2023/06/21 09:48:32 fuzzer started 2023/06/21 09:48:32 dialing manager at localhost:36067 2023/06/21 09:48:32 checking machine... 2023/06/21 09:48:32 checking revisions... [ 42.039004] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:48:32 testing simple program... [ 42.083493] cgroup: Unknown subsys name 'net' [ 42.140657] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:48:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fa8daf55050 CR3=00000000165c4000 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=2032333a38343a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a38343a3930203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000000001 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffff88800d69eff0 RSP=ffff88800d69eeb8 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88800d69eff8 R13=ffff88800d69efe0 R14=ffff88800d69efd9 R15=ffff88800d69ef98 RIP=ffffffff8112fc18 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 00007fba0a3a9900 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=00007fba0a388020 CR3=000000001ca02000 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