syzkaller login: [ 31.269657] BUG: Bad rss-counter state mm:000000003330ef68 type:MM_FILEPAGES val:33 [ 31.271972] BUG: Bad rss-counter state mm:000000003330ef68 type:MM_ANONPAGES val:22 [ 31.466220] ================================================================== [ 31.466842] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.467456] Read of size 8 at addr ffff88800cccc880 by task sshd/222 [ 31.467968] [ 31.468112] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.468652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.469265] Call Trace: [ 31.469521] [ 31.469709] dump_stack_lvl+0x91/0xf0 [ 31.470035] print_report+0xcc/0x620 [ 31.470384] ? __virt_addr_valid+0x102/0x340 [ 31.470734] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.471122] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.471560] kasan_report+0xbe/0xf0 [ 31.471873] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.472573] vma_interval_tree_remove+0xc75/0xec0 [ 31.472963] vma_prepare+0xc54/0x11a0 [ 31.473511] __split_vma+0x5af/0x950 [ 31.474357] ? __pfx___split_vma+0x10/0x10 [ 31.475558] ? find_held_lock+0x2c/0x110 [ 31.476724] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.477854] ? lock_is_held_type+0x9f/0x120 [ 31.478935] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.480212] ? mtree_range_walk+0x632/0x900 [ 31.481440] ? mas_walk+0x5c7/0x7c0 [ 31.482260] do_vmi_munmap+0x1f1/0x2b0 [ 31.483223] mmap_region+0x1f9/0x2660 [ 31.484417] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.485472] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.486868] ? __pfx_lock_acquire+0x10/0x10 [ 31.487947] ? __pfx_mmap_region+0x10/0x10 [ 31.489111] ? security_mmap_addr+0x7d/0xa0 [ 31.490157] ? get_unmapped_area+0x1f5/0x3f0 [ 31.491236] do_mmap+0x854/0xf00 [ 31.492022] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.493050] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.494268] ksys_mmap_pgoff+0x3af/0x500 [ 31.495270] do_syscall_64+0x3f/0x90 [ 31.496289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.497561] RIP: 0033:0x7fa94408bd82 [ 31.498508] 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 [ 31.508949] RSP: 002b:00007fff0b3b0bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.510935] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa94408bd82 [ 31.512823] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa9434c5000 [ 31.514687] RBP: 00007fa9434c5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.516507] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ff6042ec0 [ 31.518342] R13: 00007fff0b3b0c10 R14: 00007fff0b3b0c40 R15: 00007fff0b3b0fa0 [ 31.520057] [ 31.520584] [ 31.520956] Allocated by task 213: [ 31.521737] kasan_save_stack+0x22/0x50 [ 31.522770] kasan_set_track+0x25/0x30 [ 31.523670] __kasan_slab_alloc+0x59/0x70 [ 31.524616] kmem_cache_alloc+0x16b/0x370 [ 31.525547] vm_area_dup+0x20/0x160 [ 31.526360] __split_vma+0x170/0x950 [ 31.527180] split_vma+0xc6/0x110 [ 31.527969] mprotect_fixup+0x8d2/0xb30 [ 31.528853] do_mprotect_pkey+0x87e/0xd40 [ 31.529773] __x64_sys_mprotect+0x78/0xc0 [ 31.530700] do_syscall_64+0x3f/0x90 [ 31.531555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.532720] [ 31.533084] Freed by task 213: [ 31.533789] kasan_save_stack+0x22/0x50 [ 31.534683] kasan_set_track+0x25/0x30 [ 31.535551] kasan_save_free_info+0x2b/0x50 [ 31.536536] __kasan_slab_free+0x10a/0x190 [ 31.537476] kmem_cache_free+0x10d/0x4d0 [ 31.538387] rcu_core+0x8c8/0x2860 [ 31.539174] __do_softirq+0x1b7/0x7d4 [ 31.540041] [ 31.540406] Last potentially related work creation: [ 31.541508] kasan_save_stack+0x22/0x50 [ 31.542404] __kasan_record_aux_stack+0x8e/0xa0 [ 31.543425] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.544612] remove_vma+0x139/0x170 [ 31.545401] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.546417] do_vmi_munmap+0x1f1/0x2b0 [ 31.547272] __vm_munmap+0x138/0x3a0 [ 31.548101] __x64_sys_munmap+0x59/0x80 [ 31.548995] do_syscall_64+0x3f/0x90 [ 31.549821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.550962] [ 31.551315] Second to last potentially related work creation: [ 31.552608] kasan_save_stack+0x22/0x50 [ 31.553488] __kasan_record_aux_stack+0x8e/0xa0 [ 31.554494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.555631] remove_vma+0x139/0x170 [ 31.556433] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.557444] do_vmi_munmap+0x1f1/0x2b0 [ 31.558305] mmap_region+0x1f9/0x2660 [ 31.559136] do_mmap+0x854/0xf00 [ 31.559914] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.560818] ksys_mmap_pgoff+0x3af/0x500 [ 31.561746] do_syscall_64+0x3f/0x90 [ 31.562577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.563730] [ 31.564110] The buggy address belongs to the object at ffff88800cccc828 [ 31.564110] which belongs to the cache vm_area_struct of size 168 [ 31.566935] The buggy address is located 88 bytes inside of [ 31.566935] freed 168-byte region [ffff88800cccc828, ffff88800cccc8d0) [ 31.569630] [ 31.569994] The buggy address belongs to the physical page: [ 31.571229] page:0000000096d97461 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcccc [ 31.573342] memcg:ffff88800cdad601 [ 31.574144] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.575346] page_type: 0xffffffff() [ 31.576192] raw: 0100000000000200 ffff88800879fc80 ffffea0000356540 dead000000000004 [ 31.577938] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cdad601 [ 31.579635] page dumped because: kasan: bad access detected [ 31.580877] [ 31.581237] Memory state around the buggy address: [ 31.582306] ffff88800cccc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.583914] ffff88800cccc800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.585502] >ffff88800cccc880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.587099] ^ [ 31.587846] ffff88800cccc900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.589439] ffff88800cccc980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.591291] ================================================================== [ 31.593138] Disabling lock debugging due to kernel taint [ 34.736526] BUG: Bad rss-counter state mm:0000000022afc713 type:MM_FILEPAGES val:33 [ 34.737219] BUG: Bad rss-counter state mm:0000000022afc713 type:MM_ANONPAGES val:22 [ 35.337753] BUG: Bad rss-counter state mm:0000000035392ca8 type:MM_FILEPAGES val:33 [ 35.338507] BUG: Bad rss-counter state mm:0000000035392ca8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52932' (ECDSA) to the list of known hosts. 2023/06/20 09:55:56 fuzzer started 2023/06/20 09:55:57 dialing manager at localhost:44161 2023/06/20 09:55:57 checking machine... 2023/06/20 09:55:57 checking revisions... [ 36.159811] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:55:57 testing simple program... [ 36.194781] cgroup: Unknown subsys name 'net' [ 36.303021] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:55:56 Registers: info registers vcpu 0 RAX=0000000000000033 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8 RSI=ffffffff82505fe5 RDI=ffffffff87f6c0a0 RBP=ffffffff87f6c060 RSP=ffff888019c7fa80 R8 =0000000000000001 R9 =000000000000000a R10=0000000000000033 R11=000000003a475542 R12=0000000000000033 R13=ffffffff87f6c060 R14=0000000000000010 R15=ffffffff82505fd0 RIP=ffffffff8250603d RFL=00000002 [-------] 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 00007fd6f8545900 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=00007f5ea0e82328 CR3=000000001c862000 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=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 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=ffff888008c58400 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=00007fe2bf338160 CR3=0000000009726000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=ee14609331c570ae0000000000136980 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=412627a09375943100000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000