syzkaller login: [ 31.655654] BUG: Bad rss-counter state mm:00000000d1f2ffa9 type:MM_FILEPAGES val:33 [ 31.657919] BUG: Bad rss-counter state mm:00000000d1f2ffa9 type:MM_ANONPAGES val:22 [ 31.826134] ================================================================== [ 31.827062] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.828024] Read of size 8 at addr ffff888016691968 by task sshd/227 [ 31.829002] [ 31.829226] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.830104] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.831106] Call Trace: [ 31.831432] [ 31.831718] dump_stack_lvl+0x91/0xf0 [ 31.832218] print_report+0xcc/0x620 [ 31.832716] ? __virt_addr_valid+0x102/0x340 [ 31.833274] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.833893] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.834512] kasan_report+0xbe/0xf0 [ 31.834993] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.835614] vma_interval_tree_remove+0xc75/0xec0 [ 31.836223] vma_prepare+0xc54/0x11a0 [ 31.836715] __split_vma+0x5af/0x950 [ 31.837197] ? __pfx___split_vma+0x10/0x10 [ 31.837730] ? find_held_lock+0x2c/0x110 [ 31.838255] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.838824] ? lock_is_held_type+0x9f/0x120 [ 31.839358] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.839961] ? mtree_range_walk+0x632/0x900 [ 31.840512] ? mas_walk+0x5c7/0x7c0 [ 31.840996] do_vmi_munmap+0x1f1/0x2b0 [ 31.841488] mmap_region+0x1f9/0x2660 [ 31.841971] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.842480] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.843189] ? __pfx_lock_acquire+0x10/0x10 [ 31.843717] ? __pfx_mmap_region+0x10/0x10 [ 31.844243] ? security_mmap_addr+0x7d/0xa0 [ 31.844774] ? get_unmapped_area+0x1f5/0x3f0 [ 31.845321] do_mmap+0x854/0xf00 [ 31.845761] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.846258] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.846816] ksys_mmap_pgoff+0x3af/0x500 [ 31.847327] do_syscall_64+0x3f/0x90 [ 31.847804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.848451] RIP: 0033:0x7f11addcbd82 [ 31.848929] 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 [ 31.851098] RSP: 002b:00007fffc874e558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.851999] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11addcbd82 [ 31.852861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11ad205000 [ 31.853703] RBP: 00007f11ad205000 R08: 0000000000000009 R09: 0000000000001000 [ 31.854550] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564379412ec0 [ 31.855389] R13: 00007fffc874e570 R14: 00007fffc874e5a0 R15: 00007fffc874e900 [ 31.856236] [ 31.856528] [ 31.856759] Allocated by task 220: [ 31.857192] kasan_save_stack+0x22/0x50 [ 31.857701] kasan_set_track+0x25/0x30 [ 31.858193] __kasan_slab_alloc+0x59/0x70 [ 31.858714] kmem_cache_alloc+0x16b/0x370 [ 31.859226] vm_area_dup+0x20/0x160 [ 31.859678] __split_vma+0x170/0x950 [ 31.860138] split_vma+0xc6/0x110 [ 31.860576] mprotect_fixup+0x8d2/0xb30 [ 31.861085] do_mprotect_pkey+0x87e/0xd40 [ 31.861616] __x64_sys_mprotect+0x78/0xc0 [ 31.862148] do_syscall_64+0x3f/0x90 [ 31.862634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.863278] [ 31.863493] Freed by task 220: [ 31.863923] kasan_save_stack+0x22/0x50 [ 31.864426] kasan_set_track+0x25/0x30 [ 31.864935] kasan_save_free_info+0x2b/0x50 [ 31.865475] __kasan_slab_free+0x10a/0x190 [ 31.866003] kmem_cache_free+0x10d/0x4d0 [ 31.866505] rcu_core+0x8c8/0x2860 [ 31.866948] __do_softirq+0x1b7/0x7d4 [ 31.867420] [ 31.867632] Last potentially related work creation: [ 31.868209] kasan_save_stack+0x22/0x50 [ 31.868715] __kasan_record_aux_stack+0x8e/0xa0 [ 31.869291] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.870008] remove_vma+0x139/0x170 [ 31.870458] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.871011] do_vmi_munmap+0x1f1/0x2b0 [ 31.871493] __vm_munmap+0x138/0x3a0 [ 31.871958] __x64_sys_munmap+0x59/0x80 [ 31.872454] do_syscall_64+0x3f/0x90 [ 31.872940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.873573] [ 31.873787] The buggy address belongs to the object at ffff888016691910 [ 31.873787] which belongs to the cache vm_area_struct of size 168 [ 31.875264] The buggy address is located 88 bytes inside of [ 31.875264] freed 168-byte region [ffff888016691910, ffff8880166919b8) [ 31.876667] [ 31.876883] The buggy address belongs to the physical page: [ 31.877532] page:000000006b479ec4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16691 [ 31.878619] memcg:ffff8880176eb801 [ 31.879039] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.879676] page_type: 0xffffffff() [ 31.880124] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.881056] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880176eb801 [ 31.881954] page dumped because: kasan: bad access detected [ 31.882607] [ 31.882821] Memory state around the buggy address: [ 31.883402] ffff888016691800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.884253] ffff888016691880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.885117] >ffff888016691900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.885957] ^ [ 31.886735] ffff888016691980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.887585] ffff888016691a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.888435] ================================================================== [ 31.889448] Disabling lock debugging due to kernel taint [ 34.460324] BUG: Bad rss-counter state mm:000000007b6ba66a type:MM_FILEPAGES val:33 [ 34.462724] BUG: Bad rss-counter state mm:000000007b6ba66a type:MM_ANONPAGES val:22 [ 34.939888] BUG: Bad rss-counter state mm:0000000097556a5d type:MM_FILEPAGES val:33 [ 34.940887] BUG: Bad rss-counter state mm:0000000097556a5d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21961' (ECDSA) to the list of known hosts. 2023/06/21 10:34:23 fuzzer started 2023/06/21 10:34:23 dialing manager at localhost:36067 2023/06/21 10:34:23 checking machine... 2023/06/21 10:34:23 checking revisions... [ 35.625096] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:34:23 testing simple program... [ 35.672147] cgroup: Unknown subsys name 'net' [ 35.712484] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:34:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019a06c50 RCX=0000000000000002 RDX=ffffffff87f34700 RSI=ffffffff84905360 RDI=ffff888019a06c50 RBP=ffff888008f7a000 RSP=ffff888015987d28 R8 =000000004b4e494c R9 =000000000000001f R10=0000000000000007 R11=00000000000b6a61 R12=ffff888019a06bc0 R13=ffff888019a06c20 R14=ffff888019a06bc8 R15=ffff888019a06c30 RIP=ffffffff812dfbc4 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 00007ff68818e900 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=00007ff6887460b0 CR3=000000000ef58000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007fe9cf7ecb80 CR3=000000000978a000 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=2032323a34333a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a34333a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000