syzkaller login: [ 28.771376] BUG: Bad rss-counter state mm:000000007c06b6d6 type:MM_FILEPAGES val:33 [ 28.772649] BUG: Bad rss-counter state mm:000000007c06b6d6 type:MM_ANONPAGES val:22 [ 28.932918] ================================================================== [ 28.933860] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.934807] Read of size 8 at addr ffff88800ef10ed8 by task sshd/220 [ 28.935591] [ 28.935811] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.936791] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.937797] Call Trace: [ 28.938130] [ 28.938422] dump_stack_lvl+0x91/0xf0 [ 28.938925] print_report+0xcc/0x620 [ 28.939408] ? __virt_addr_valid+0x102/0x340 [ 28.939970] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.940598] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.941238] kasan_report+0xbe/0xf0 [ 28.941755] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.942382] vma_interval_tree_remove+0xc75/0xec0 [ 28.942995] vma_prepare+0xc54/0x11a0 [ 28.943485] __split_vma+0x5af/0x950 [ 28.943957] ? __pfx___split_vma+0x10/0x10 [ 28.944496] ? find_held_lock+0x2c/0x110 [ 28.945022] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.945611] ? lock_is_held_type+0x9f/0x120 [ 28.946162] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.946769] ? mtree_range_walk+0x632/0x900 [ 28.947335] ? mas_walk+0x5c7/0x7c0 [ 28.947818] do_vmi_munmap+0x1f1/0x2b0 [ 28.948315] mmap_region+0x1f9/0x2660 [ 28.948799] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.949321] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.950036] ? __pfx_lock_acquire+0x10/0x10 [ 28.950576] ? __pfx_mmap_region+0x10/0x10 [ 28.951110] ? security_mmap_addr+0x7d/0xa0 [ 28.951650] ? get_unmapped_area+0x1f5/0x3f0 [ 28.952205] do_mmap+0x854/0xf00 [ 28.952652] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.953153] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.953741] ksys_mmap_pgoff+0x3af/0x500 [ 28.954252] do_syscall_64+0x3f/0x90 [ 28.954735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.955388] RIP: 0033:0x7f2cf717ad82 [ 28.955845] 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 [ 28.957985] RSP: 002b:00007ffea9d1fb08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.958985] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2cf717ad82 [ 28.959844] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2cf65b4000 [ 28.960696] RBP: 00007f2cf65b4000 R08: 0000000000000009 R09: 0000000000001000 [ 28.961565] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f96ddc4ec0 [ 28.962428] R13: 00007ffea9d1fb20 R14: 00007ffea9d1fb50 R15: 00007ffea9d1feb0 [ 28.963299] [ 28.963593] [ 28.963810] Allocated by task 212: [ 28.964255] kasan_save_stack+0x22/0x50 [ 28.964761] kasan_set_track+0x25/0x30 [ 28.965258] __kasan_slab_alloc+0x59/0x70 [ 28.965800] kmem_cache_alloc+0x16b/0x370 [ 28.966328] vm_area_dup+0x20/0x160 [ 28.966794] __split_vma+0x170/0x950 [ 28.967267] split_vma+0xc6/0x110 [ 28.967713] mprotect_fixup+0x8d2/0xb30 [ 28.968215] do_mprotect_pkey+0x87e/0xd40 [ 28.968749] __x64_sys_mprotect+0x78/0xc0 [ 28.969282] do_syscall_64+0x3f/0x90 [ 28.969767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.970415] [ 28.970633] Freed by task 203: [ 28.971030] kasan_save_stack+0x22/0x50 [ 28.971545] kasan_set_track+0x25/0x30 [ 28.972046] kasan_save_free_info+0x2b/0x50 [ 28.972593] __kasan_slab_free+0x10a/0x190 [ 28.973130] kmem_cache_free+0x10d/0x4d0 [ 28.973652] rcu_core+0x8c8/0x2860 [ 28.974091] __do_softirq+0x1b7/0x7d4 [ 28.974574] [ 28.974790] Last potentially related work creation: [ 28.975382] kasan_save_stack+0x22/0x50 [ 28.975886] __kasan_record_aux_stack+0x8e/0xa0 [ 28.976463] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.977109] remove_vma+0x139/0x170 [ 28.977567] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.978131] do_vmi_munmap+0x1f1/0x2b0 [ 28.978619] __vm_munmap+0x138/0x3a0 [ 28.979086] __x64_sys_munmap+0x59/0x80 [ 28.979584] do_syscall_64+0x3f/0x90 [ 28.980060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.980715] [ 28.980929] Second to last potentially related work creation: [ 28.981653] kasan_save_stack+0x22/0x50 [ 28.982160] __kasan_record_aux_stack+0x8e/0xa0 [ 28.982744] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.983386] remove_vma+0x139/0x170 [ 28.983833] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.984395] do_vmi_munmap+0x1f1/0x2b0 [ 28.984901] mmap_region+0x1f9/0x2660 [ 28.985414] do_mmap+0x854/0xf00 [ 28.985848] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.986343] ksys_mmap_pgoff+0x3af/0x500 [ 28.986845] do_syscall_64+0x3f/0x90 [ 28.987335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.987992] [ 28.988218] The buggy address belongs to the object at ffff88800ef10e80 [ 28.988218] which belongs to the cache vm_area_struct of size 168 [ 28.989721] The buggy address is located 88 bytes inside of [ 28.989721] freed 168-byte region [ffff88800ef10e80, ffff88800ef10f28) [ 28.991129] [ 28.991346] The buggy address belongs to the physical page: [ 28.992015] page:0000000019489190 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef10 [ 28.993119] memcg:ffff88800f719301 [ 28.993568] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.994274] page_type: 0xffffffff() [ 28.994729] raw: 0100000000000200 ffff8880087a0c80 ffffea0000266940 dead000000000005 [ 28.995651] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f719301 [ 28.996568] page dumped because: kasan: bad access detected [ 28.997233] [ 28.997464] Memory state around the buggy address: [ 28.998043] ffff88800ef10d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.998907] ffff88800ef10e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.999771] >ffff88800ef10e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.000622] ^ [ 29.001375] ffff88800ef10f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 29.002238] ffff88800ef10f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.003100] ================================================================== [ 29.004098] Disabling lock debugging due to kernel taint [ 30.881150] BUG: Bad rss-counter state mm:000000000a1d839b type:MM_FILEPAGES val:33 [ 30.882803] BUG: Bad rss-counter state mm:000000000a1d839b type:MM_ANONPAGES val:22 [ 31.375128] BUG: Bad rss-counter state mm:00000000ee56520e type:MM_FILEPAGES val:33 [ 31.376415] BUG: Bad rss-counter state mm:00000000ee56520e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43340' (ECDSA) to the list of known hosts. 2023/06/20 18:28:45 fuzzer started 2023/06/20 18:28:45 dialing manager at localhost:36067 2023/06/20 18:28:45 checking machine... 2023/06/20 18:28:45 checking revisions... [ 32.084396] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:28:45 testing simple program... [ 32.132724] cgroup: Unknown subsys name 'net' [ 32.185891] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:28:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880069f1018 RCX=0000000000000000 RDX=1ffff11000d3e204 RSI=ffffffff81f30ea5 RDI=ffff8880069f1020 RBP=00000000000002f0 RSP=ffff88800ff17a18 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000006 R11=00000000000b6a61 R12=ffff8880090ef008 R13=ffff88800ff17c24 R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff81f30ebe RFL=00000212 [----A--] 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 00007fd16c66f900 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=00007f39420e0000 CR3=0000000019662000 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=8bbb8ac42aad19b0b549fc3f5973c9f6 XMM02=ec2efd57dc4c00df000000000011bdc8 XMM03=ebc1a7b2777e63e6000000000011be98 XMM04=2fc23fa94be5a41200000000000ae988 XMM05=7f9405b06ff5800b0000000000134b08 XMM06=4fda316b135da52b0000000000133ba8 XMM07=e042d86d42eb936e00000000001226c8 XMM08=ebc1a7b2777e63e6000000000011be98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fd16cc270b0 CR3=0000000017cb6000 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=2035343a38323a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a38323a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000