syzkaller login: [ 34.302692] BUG: Bad rss-counter state mm:00000000146148c2 type:MM_FILEPAGES val:33 [ 34.303899] BUG: Bad rss-counter state mm:00000000146148c2 type:MM_ANONPAGES val:22 [ 34.344507] ================================================================== [ 34.345581] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.346774] Read of size 8 at addr ffff8880095ac140 by task sshd/220 [ 34.347649] [ 34.347951] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.348959] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.350116] Call Trace: [ 34.350454] [ 34.350788] dump_stack_lvl+0x91/0xf0 [ 34.351410] print_report+0xcc/0x620 [ 34.351921] ? __virt_addr_valid+0x102/0x340 [ 34.352498] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.353245] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.353945] kasan_report+0xbe/0xf0 [ 34.354568] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.355362] vma_interval_tree_remove+0xc75/0xec0 [ 34.356052] vma_prepare+0xc54/0x11a0 [ 34.356655] __split_vma+0x5af/0x950 [ 34.357152] ? __pfx___split_vma+0x10/0x10 [ 34.357718] ? find_held_lock+0x2c/0x110 [ 34.358420] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.359151] ? lock_is_held_type+0x9f/0x120 [ 34.359719] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.360353] ? mtree_range_walk+0x632/0x900 [ 34.360931] ? mas_walk+0x5c7/0x7c0 [ 34.361432] do_vmi_munmap+0x1f1/0x2b0 [ 34.361950] mmap_region+0x1f9/0x2660 [ 34.362472] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.363013] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.363772] ? __pfx_lock_acquire+0x10/0x10 [ 34.364336] ? __pfx_mmap_region+0x10/0x10 [ 34.364991] ? security_mmap_addr+0x7d/0xa0 [ 34.365633] ? get_unmapped_area+0x1f5/0x3f0 [ 34.366220] do_mmap+0x854/0xf00 [ 34.366685] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.367206] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.367801] ksys_mmap_pgoff+0x3af/0x500 [ 34.368342] do_syscall_64+0x3f/0x90 [ 34.368847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.369532] RIP: 0033:0x7f27b6250d82 [ 34.370036] 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 [ 34.372272] RSP: 002b:00007ffea5524728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.373228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f27b6250d82 [ 34.374127] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f27b568a000 [ 34.375019] RBP: 00007f27b568a000 R08: 0000000000000009 R09: 0000000000001000 [ 34.375913] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609ac4f2f70 [ 34.376808] R13: 00007ffea5524740 R14: 00007ffea5524770 R15: 00007ffea5524ad0 [ 34.377707] [ 34.378030] [ 34.378258] Allocated by task 213: [ 34.378714] kasan_save_stack+0x22/0x50 [ 34.379248] kasan_set_track+0x25/0x30 [ 34.379771] __kasan_slab_alloc+0x59/0x70 [ 34.380324] kmem_cache_alloc+0x16b/0x370 [ 34.380869] vm_area_dup+0x20/0x160 [ 34.381349] __split_vma+0x170/0x950 [ 34.381849] split_vma+0xc6/0x110 [ 34.382323] mprotect_fixup+0x8d2/0xb30 [ 34.382856] do_mprotect_pkey+0x87e/0xd40 [ 34.383421] __x64_sys_mprotect+0x78/0xc0 [ 34.383982] do_syscall_64+0x3f/0x90 [ 34.384493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.385184] [ 34.385416] Freed by task 213: [ 34.385831] kasan_save_stack+0x22/0x50 [ 34.386401] kasan_set_track+0x25/0x30 [ 34.386929] kasan_save_free_info+0x2b/0x50 [ 34.387497] __kasan_slab_free+0x10a/0x190 [ 34.388071] kmem_cache_free+0x10d/0x4d0 [ 34.388618] rcu_core+0x8c8/0x2860 [ 34.389093] __do_softirq+0x1b7/0x7d4 [ 34.389610] [ 34.389924] Last potentially related work creation: [ 34.390564] kasan_save_stack+0x22/0x50 [ 34.391108] __kasan_record_aux_stack+0x8e/0xa0 [ 34.391727] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.392418] remove_vma+0x139/0x170 [ 34.392898] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.393500] do_vmi_munmap+0x1f1/0x2b0 [ 34.394024] __vm_munmap+0x138/0x3a0 [ 34.394526] __x64_sys_munmap+0x59/0x80 [ 34.395063] do_syscall_64+0x3f/0x90 [ 34.395571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.396250] [ 34.396484] The buggy address belongs to the object at ffff8880095ac0e8 [ 34.396484] which belongs to the cache vm_area_struct of size 168 [ 34.398056] The buggy address is located 88 bytes inside of [ 34.398056] freed 168-byte region [ffff8880095ac0e8, ffff8880095ac190) [ 34.399566] [ 34.399798] The buggy address belongs to the physical page: [ 34.400519] page:00000000047df306 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95ac [ 34.401707] memcg:ffff888016e02601 [ 34.402177] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.402879] page_type: 0xffffffff() [ 34.403370] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.404391] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e02601 [ 34.405375] page dumped because: kasan: bad access detected [ 34.406107] [ 34.406336] Memory state around the buggy address: [ 34.406955] ffff8880095ac000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.407873] ffff8880095ac080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 34.408781] >ffff8880095ac100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.409690] ^ [ 34.410376] ffff8880095ac180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.411300] ffff8880095ac200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.412209] ================================================================== [ 34.413237] Disabling lock debugging due to kernel taint [ 37.141254] BUG: Bad rss-counter state mm:000000001087fc38 type:MM_FILEPAGES val:33 [ 37.142457] BUG: Bad rss-counter state mm:000000001087fc38 type:MM_ANONPAGES val:22 [ 37.534598] BUG: Bad rss-counter state mm:00000000cb42ecbb type:MM_FILEPAGES val:33 [ 37.535614] BUG: Bad rss-counter state mm:00000000cb42ecbb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53778' (ECDSA) to the list of known hosts. 2023/06/20 07:05:08 fuzzer started 2023/06/20 07:05:08 dialing manager at localhost:44161 2023/06/20 07:05:08 checking machine... 2023/06/20 07:05:08 checking revisions... [ 38.276462] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:05:09 testing simple program... [ 38.317449] cgroup: Unknown subsys name 'net' [ 38.378671] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:05:04 Registers: info registers vcpu 0 RAX=0000000000000020 RBX=000055d603830300 RCX=00007ffc5e395978 RDX=0000000000000001 RSI=0000000000000000 RDI=000055d6038303f0 RBP=00007ffc5e395eb0 RSP=00007ffc5e3958f0 R8 =000055d603810ce0 R9 =00000000ffffffff R10=000055d60380aeb0 R11=0000000000000000 R12=0000000000000000 R13=00007ffc5e395ed0 R14=000055d6038303f0 R15=00007ffc5e395f80 RIP=00007fadbfe9fadd RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fadbf9c3900 00000000 00000000 GS =0000 0000000000000000 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=00007fadbff7b0b0 CR3=000000000ffae000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007fc822a720d0 CR3=000000000c9be000 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=2ee02e8b1073879c9b4f76146bbe3eb7 XMM02=000000000011dcc0ec2efd57dc4c00df XMM03=0000000000124990f3d28a113dfd4828 XMM04=7e616dfa687a3bdb00000000000ae988 XMM05=cb7fd189064e99ca0000000000134a20 XMM06=4fda316b135da52b0000000000134418 XMM07=e042d86d42eb936e0000000000124c10 XMM08=f3d28a113dfd4828000000000011dd20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000