syzkaller login: [ 32.549919] BUG: Bad rss-counter state mm:00000000967a94e1 type:MM_FILEPAGES val:33 [ 32.551326] BUG: Bad rss-counter state mm:00000000967a94e1 type:MM_ANONPAGES val:22 [ 32.593211] ================================================================== [ 32.593905] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.594609] Read of size 8 at addr ffff88800c962798 by task sshd/221 [ 32.595190] [ 32.595354] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.596024] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.596752] Call Trace: [ 32.596991] [ 32.597210] dump_stack_lvl+0x91/0xf0 [ 32.597729] print_report+0xcc/0x620 [ 32.598094] ? __virt_addr_valid+0x102/0x340 [ 32.598508] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.598973] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.599438] kasan_report+0xbe/0xf0 [ 32.599815] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.600286] vma_interval_tree_remove+0xc75/0xec0 [ 32.600744] vma_prepare+0xc54/0x11a0 [ 32.601109] __split_vma+0x5af/0x950 [ 32.601464] ? __pfx___split_vma+0x10/0x10 [ 32.601862] ? find_held_lock+0x2c/0x110 [ 32.602252] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.602677] ? lock_is_held_type+0x9f/0x120 [ 32.603085] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.603545] ? mtree_range_walk+0x632/0x900 [ 32.603987] ? mas_walk+0x5c7/0x7c0 [ 32.604343] do_vmi_munmap+0x1f1/0x2b0 [ 32.604713] mmap_region+0x1f9/0x2660 [ 32.605035] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.605370] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.605836] ? __pfx_lock_acquire+0x10/0x10 [ 32.606183] ? __pfx_mmap_region+0x10/0x10 [ 32.606530] ? security_mmap_addr+0x7d/0xa0 [ 32.606881] ? get_unmapped_area+0x1f5/0x3f0 [ 32.607242] do_mmap+0x854/0xf00 [ 32.607526] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.607859] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.608227] ksys_mmap_pgoff+0x3af/0x500 [ 32.608562] do_syscall_64+0x3f/0x90 [ 32.608870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.609297] RIP: 0033:0x7fb315f5fd82 [ 32.609599] 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 [ 32.611006] RSP: 002b:00007ffc91cdeab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.611598] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb315f5fd82 [ 32.612152] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb315399000 [ 32.612709] RBP: 00007fb315399000 R08: 0000000000000009 R09: 0000000000001000 [ 32.613271] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc4570eec0 [ 32.613825] R13: 00007ffc91cdead0 R14: 00007ffc91cdeb00 R15: 00007ffc91cdee60 [ 32.614389] [ 32.614580] [ 32.614721] Allocated by task 214: [ 32.615006] kasan_save_stack+0x22/0x50 [ 32.615338] kasan_set_track+0x25/0x30 [ 32.615665] __kasan_slab_alloc+0x59/0x70 [ 32.616020] kmem_cache_alloc+0x16b/0x370 [ 32.616359] vm_area_dup+0x20/0x160 [ 32.616656] __split_vma+0x170/0x950 [ 32.616964] split_vma+0xc6/0x110 [ 32.617251] mprotect_fixup+0x8d2/0xb30 [ 32.617581] do_mprotect_pkey+0x87e/0xd40 [ 32.617924] __x64_sys_mprotect+0x78/0xc0 [ 32.618262] do_syscall_64+0x3f/0x90 [ 32.618574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.618996] [ 32.619138] Freed by task 214: [ 32.619394] kasan_save_stack+0x22/0x50 [ 32.619725] kasan_set_track+0x25/0x30 [ 32.620047] kasan_save_free_info+0x2b/0x50 [ 32.620396] __kasan_slab_free+0x10a/0x190 [ 32.620742] kmem_cache_free+0x10d/0x4d0 [ 32.621079] rcu_core+0x8c8/0x2860 [ 32.621366] __do_softirq+0x1b7/0x7d4 [ 32.621680] [ 32.621824] Last potentially related work creation: [ 32.622211] kasan_save_stack+0x22/0x50 [ 32.622538] __kasan_record_aux_stack+0x8e/0xa0 [ 32.622914] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.623341] remove_vma+0x139/0x170 [ 32.623634] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.624000] do_vmi_munmap+0x1f1/0x2b0 [ 32.624320] __vm_munmap+0x138/0x3a0 [ 32.624621] __x64_sys_munmap+0x59/0x80 [ 32.624942] do_syscall_64+0x3f/0x90 [ 32.625250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.625665] [ 32.625805] Second to last potentially related work creation: [ 32.626250] kasan_save_stack+0x22/0x50 [ 32.626580] __kasan_record_aux_stack+0x8e/0xa0 [ 32.626953] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.627371] remove_vma+0x139/0x170 [ 32.627661] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.628041] do_vmi_munmap+0x1f1/0x2b0 [ 32.628358] mmap_region+0x1f9/0x2660 [ 32.628668] do_mmap+0x854/0xf00 [ 32.628951] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.629270] ksys_mmap_pgoff+0x7d/0x500 [ 32.629594] do_syscall_64+0x3f/0x90 [ 32.629904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.630320] [ 32.630460] The buggy address belongs to the object at ffff88800c962740 [ 32.630460] which belongs to the cache vm_area_struct of size 168 [ 32.631429] The buggy address is located 88 bytes inside of [ 32.631429] freed 168-byte region [ffff88800c962740, ffff88800c9627e8) [ 32.632358] [ 32.632499] The buggy address belongs to the physical page: [ 32.632933] page:000000001c39e3d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc962 [ 32.633639] memcg:ffff88800e5ca601 [ 32.633919] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.634341] page_type: 0xffffffff() [ 32.634632] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 32.635228] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5ca601 [ 32.635826] page dumped because: kasan: bad access detected [ 32.636256] [ 32.636395] Memory state around the buggy address: [ 32.636770] ffff88800c962680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.637325] ffff88800c962700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.637891] >ffff88800c962780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.638440] ^ [ 32.638764] ffff88800c962800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.639322] ffff88800c962880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.639890] ================================================================== [ 32.640660] Disabling lock debugging due to kernel taint [ 35.003922] BUG: Bad rss-counter state mm:000000000f0167c9 type:MM_FILEPAGES val:33 [ 35.004955] BUG: Bad rss-counter state mm:000000000f0167c9 type:MM_ANONPAGES val:22 [ 35.503929] BUG: Bad rss-counter state mm:00000000f2d5c418 type:MM_FILEPAGES val:33 [ 35.504830] BUG: Bad rss-counter state mm:00000000f2d5c418 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23046' (ECDSA) to the list of known hosts. 2023/06/20 09:37:48 fuzzer started 2023/06/20 09:37:49 dialing manager at localhost:44161 2023/06/20 09:37:49 checking machine... 2023/06/20 09:37:49 checking revisions... [ 36.265582] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:37:49 testing simple program... [ 36.333383] cgroup: Unknown subsys name 'net' [ 36.386966] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:37:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801428fb20 RCX=0000000000000000 RDX=ffff88800d143680 RSI=ffffffff8189b304 RDI=0000000000000005 RBP=ffff88801428f9d0 RSP=ffff88801428f998 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000041 R13=ffff88801428fb40 R14=ffff88801428fb58 R15=0000000000000000 RIP=ffffffff8189b304 RFL=00000293 [--S-A-C] 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 00007f7845136900 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=00007f78456eb650 CR3=000000001c580000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=dffffc0000000000 RCX=ffffffff815a546e RDX=0000000000000000 RSI=0000000040000003 RDI=00000000c000003e RBP=ffff88801431fd28 RSP=ffff88801431fc58 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=0000000040000003 R13=ffff88801431fd60 R14=00000000c000003e R15=ffffc9000064a068 RIP=ffffffff814c02f8 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 00007f27a5cc0900 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=00007f27a5142d30 CR3=000000000f5f2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a324d27f068dc23400000000000ae988 XMM05=f4f1ac5b3e20dd800000000000136218 XMM06=00c3ffa147b8d8570000000000135008 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000