syzkaller login: [ 32.726856] BUG: Bad rss-counter state mm:000000003da19ba6 type:MM_FILEPAGES val:33 [ 32.728088] BUG: Bad rss-counter state mm:000000003da19ba6 type:MM_ANONPAGES val:22 [ 32.881014] ================================================================== [ 32.881921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.882888] Read of size 8 at addr ffff888015b3f880 by task sshd/220 [ 32.883658] [ 32.883879] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.884843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.885829] Call Trace: [ 32.886151] [ 32.886434] dump_stack_lvl+0x91/0xf0 [ 32.886947] print_report+0xcc/0x620 [ 32.887430] ? __virt_addr_valid+0x102/0x340 [ 32.887979] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.888607] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.889240] kasan_report+0xbe/0xf0 [ 32.889711] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.890331] vma_interval_tree_remove+0xc75/0xec0 [ 32.890957] vma_prepare+0xc54/0x11a0 [ 32.891437] __split_vma+0x5af/0x950 [ 32.891914] ? __pfx___split_vma+0x10/0x10 [ 32.892454] ? find_held_lock+0x2c/0x110 [ 32.892982] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.893551] ? lock_is_held_type+0x9f/0x120 [ 32.894086] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.894696] ? mtree_range_walk+0x632/0x900 [ 32.895249] ? mas_walk+0x5c7/0x7c0 [ 32.895724] do_vmi_munmap+0x1f1/0x2b0 [ 32.896218] mmap_region+0x1f9/0x2660 [ 32.896698] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.897216] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.897927] ? __pfx_lock_acquire+0x10/0x10 [ 32.898456] ? __pfx_mmap_region+0x10/0x10 [ 32.899000] ? security_mmap_addr+0x7d/0xa0 [ 32.899536] ? get_unmapped_area+0x1f5/0x3f0 [ 32.900082] do_mmap+0x854/0xf00 [ 32.900522] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.901017] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.901574] ksys_mmap_pgoff+0x3af/0x500 [ 32.902092] do_syscall_64+0x3f/0x90 [ 32.902565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.903238] RIP: 0033:0x7febf10ffd82 [ 32.903692] 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 [ 32.905800] RSP: 002b:00007ffecccee208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.906736] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007febf10ffd82 [ 32.907595] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007febf0539000 [ 32.908445] RBP: 00007febf0539000 R08: 0000000000000009 R09: 0000000000001000 [ 32.909299] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea71518ec0 [ 32.910155] R13: 00007ffecccee220 R14: 00007ffecccee250 R15: 00007ffecccee5b0 [ 32.911037] [ 32.911328] [ 32.911543] Allocated by task 213: [ 32.911972] kasan_save_stack+0x22/0x50 [ 32.912480] kasan_set_track+0x25/0x30 [ 32.912976] __kasan_slab_alloc+0x59/0x70 [ 32.913505] kmem_cache_alloc+0x16b/0x370 [ 32.914021] vm_area_dup+0x20/0x160 [ 32.914481] __split_vma+0x170/0x950 [ 32.914952] split_vma+0xc6/0x110 [ 32.915417] mprotect_fixup+0x8d2/0xb30 [ 32.915939] do_mprotect_pkey+0x87e/0xd40 [ 32.916489] __x64_sys_mprotect+0x78/0xc0 [ 32.917036] do_syscall_64+0x3f/0x90 [ 32.917537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.918214] [ 32.918438] Freed by task 213: [ 32.918870] kasan_save_stack+0x22/0x50 [ 32.919388] kasan_set_track+0x25/0x30 [ 32.919910] kasan_save_free_info+0x2b/0x50 [ 32.920467] __kasan_slab_free+0x10a/0x190 [ 32.921021] kmem_cache_free+0x10d/0x4d0 [ 32.921551] rcu_core+0x8c8/0x2860 [ 32.922020] __do_softirq+0x1b7/0x7d4 [ 32.922513] [ 32.922741] Last potentially related work creation: [ 32.923346] kasan_save_stack+0x22/0x50 [ 32.923869] __kasan_record_aux_stack+0x8e/0xa0 [ 32.924476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.925134] remove_vma+0x139/0x170 [ 32.925601] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.926177] do_vmi_munmap+0x1f1/0x2b0 [ 32.926689] __vm_munmap+0x138/0x3a0 [ 32.927183] __x64_sys_munmap+0x59/0x80 [ 32.927712] do_syscall_64+0x3f/0x90 [ 32.928201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.928868] [ 32.929092] The buggy address belongs to the object at ffff888015b3f828 [ 32.929092] which belongs to the cache vm_area_struct of size 168 [ 32.930638] The buggy address is located 88 bytes inside of [ 32.930638] freed 168-byte region [ffff888015b3f828, ffff888015b3f8d0) [ 32.932144] [ 32.932372] The buggy address belongs to the physical page: [ 32.933070] page:000000003d6b0615 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b3f [ 32.934221] memcg:ffff888017ec5d01 [ 32.934666] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.935359] page_type: 0xffffffff() [ 32.935834] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.936786] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017ec5d01 [ 32.937745] page dumped because: kasan: bad access detected [ 32.938437] [ 32.938663] Memory state around the buggy address: [ 32.939287] ffff888015b3f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.940205] ffff888015b3f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.941096] >ffff888015b3f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.941994] ^ [ 32.942426] ffff888015b3f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.943330] ffff888015b3f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.944231] ================================================================== [ 32.945254] Disabling lock debugging due to kernel taint [ 34.727709] BUG: Bad rss-counter state mm:0000000095067681 type:MM_FILEPAGES val:33 [ 34.728512] BUG: Bad rss-counter state mm:0000000095067681 type:MM_ANONPAGES val:22 [ 35.119510] BUG: Bad rss-counter state mm:00000000aa2542e9 type:MM_FILEPAGES val:33 [ 35.120481] BUG: Bad rss-counter state mm:00000000aa2542e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17798' (ECDSA) to the list of known hosts. 2023/06/20 07:00:03 fuzzer started 2023/06/20 07:00:03 dialing manager at localhost:44161 2023/06/20 07:00:03 checking machine... 2023/06/20 07:00:03 checking revisions... [ 35.674175] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:00:03 testing simple program... [ 35.718747] cgroup: Unknown subsys name 'net' [ 35.769316] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:00:01 Registers: info registers vcpu 0 RAX=1ffff11001b88e5f RBX=ffff88800dc472c8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800dc472f8 RBP=ffff88800e907000 RSP=ffff888008d7fc98 R8 =0000000000000001 R9 =ffffed10011aff87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800e8fa280 R14=ffffffff8186b9c5 R15=ffff88800e5f4f80 RIP=ffffffff81846362 RFL=00000046 [---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 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=00007ffc9b2b4000 CR3=000000000e3ea000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 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=00007fe3dabd03f0 CR3=000000000fd46000 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=2033303a30303a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a30303a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000