syzkaller login: [ 35.122690] BUG: Bad rss-counter state mm:00000000c77ec21d type:MM_FILEPAGES val:33 [ 35.123464] BUG: Bad rss-counter state mm:00000000c77ec21d type:MM_ANONPAGES val:22 [ 35.316297] ================================================================== [ 35.316935] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.317617] Read of size 8 at addr ffff888017f0f058 by task sshd/220 [ 35.318156] [ 35.318308] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.318902] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.319584] Call Trace: [ 35.319812] [ 35.320013] dump_stack_lvl+0x91/0xf0 [ 35.320364] print_report+0xcc/0x620 [ 35.320700] ? __virt_addr_valid+0x102/0x340 [ 35.321107] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.321537] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.321991] kasan_report+0xbe/0xf0 [ 35.322386] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.322889] vma_interval_tree_remove+0xc75/0xec0 [ 35.323381] vma_prepare+0xc54/0x11a0 [ 35.323774] __split_vma+0x5af/0x950 [ 35.324168] ? __pfx___split_vma+0x10/0x10 [ 35.324602] ? find_held_lock+0x2c/0x110 [ 35.325040] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.325509] ? lock_is_held_type+0x9f/0x120 [ 35.325958] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.326460] ? mtree_range_walk+0x632/0x900 [ 35.326913] ? mas_walk+0x5c7/0x7c0 [ 35.327310] do_vmi_munmap+0x1f1/0x2b0 [ 35.327718] mmap_region+0x1f9/0x2660 [ 35.328116] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.328555] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.329178] ? __pfx_lock_acquire+0x10/0x10 [ 35.329620] ? __pfx_mmap_region+0x10/0x10 [ 35.330028] ? security_mmap_addr+0x7d/0xa0 [ 35.330405] ? get_unmapped_area+0x1f5/0x3f0 [ 35.330790] do_mmap+0x854/0xf00 [ 35.331096] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.331445] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.331836] ksys_mmap_pgoff+0x3af/0x500 [ 35.332191] do_syscall_64+0x3f/0x90 [ 35.332528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.332991] RIP: 0033:0x7f3940b36d82 [ 35.333315] 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 [ 35.334825] RSP: 002b:00007fff85a898e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.335471] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3940b36d82 [ 35.336072] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f393ff70000 [ 35.336673] RBP: 00007f393ff70000 R08: 0000000000000009 R09: 0000000000001000 [ 35.337288] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d15f628ec0 [ 35.337891] R13: 00007fff85a89900 R14: 00007fff85a89930 R15: 00007fff85a89c90 [ 35.338505] [ 35.338709] [ 35.338854] Allocated by task 213: [ 35.339157] kasan_save_stack+0x22/0x50 [ 35.339515] kasan_set_track+0x25/0x30 [ 35.339857] __kasan_slab_alloc+0x59/0x70 [ 35.340227] kmem_cache_alloc+0x16b/0x370 [ 35.340591] vm_area_dup+0x20/0x160 [ 35.340942] __split_vma+0x170/0x950 [ 35.341271] split_vma+0xc6/0x110 [ 35.341583] mprotect_fixup+0x8d2/0xb30 [ 35.341935] do_mprotect_pkey+0x87e/0xd40 [ 35.342298] __x64_sys_mprotect+0x78/0xc0 [ 35.342664] do_syscall_64+0x3f/0x90 [ 35.342997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.343447] [ 35.343598] Freed by task 213: [ 35.343871] kasan_save_stack+0x22/0x50 [ 35.344224] kasan_set_track+0x25/0x30 [ 35.344571] kasan_save_free_info+0x2b/0x50 [ 35.344952] __kasan_slab_free+0x10a/0x190 [ 35.345323] kmem_cache_free+0x10d/0x4d0 [ 35.345680] rcu_core+0x8c8/0x2860 [ 35.345991] __do_softirq+0x1b7/0x7d4 [ 35.346330] [ 35.346480] Last potentially related work creation: [ 35.346899] kasan_save_stack+0x22/0x50 [ 35.347253] __kasan_record_aux_stack+0x8e/0xa0 [ 35.347656] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.348107] remove_vma+0x139/0x170 [ 35.348423] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.348813] do_vmi_munmap+0x1f1/0x2b0 [ 35.349165] __vm_munmap+0x138/0x3a0 [ 35.349493] __x64_sys_munmap+0x59/0x80 [ 35.349839] do_syscall_64+0x3f/0x90 [ 35.350173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.350624] [ 35.350776] The buggy address belongs to the object at ffff888017f0f000 [ 35.350776] which belongs to the cache vm_area_struct of size 168 [ 35.351811] The buggy address is located 88 bytes inside of [ 35.351811] freed 168-byte region [ffff888017f0f000, ffff888017f0f0a8) [ 35.352811] [ 35.352978] The buggy address belongs to the physical page: [ 35.353442] page:000000005217b683 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f0f [ 35.354304] memcg:ffff88800d8e1101 [ 35.354608] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.355067] page_type: 0xffffffff() [ 35.355383] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.356041] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8e1101 [ 35.356692] page dumped because: kasan: bad access detected [ 35.357168] [ 35.357322] Memory state around the buggy address: [ 35.357730] ffff888017f0ef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.358326] ffff888017f0ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.358937] >ffff888017f0f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.359542] ^ [ 35.360059] ffff888017f0f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.360664] ffff888017f0f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.361289] ================================================================== [ 35.361979] Disabling lock debugging due to kernel taint [ 37.160960] BUG: Bad rss-counter state mm:000000004e9562ac type:MM_FILEPAGES val:33 [ 37.161760] BUG: Bad rss-counter state mm:000000004e9562ac type:MM_ANONPAGES val:22 [ 37.639886] BUG: Bad rss-counter state mm:000000002b271fc4 type:MM_FILEPAGES val:33 [ 37.640443] BUG: Bad rss-counter state mm:000000002b271fc4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38370' (ECDSA) to the list of known hosts. 2023/06/20 10:02:42 fuzzer started 2023/06/20 10:02:42 dialing manager at localhost:44161 2023/06/20 10:02:42 checking machine... 2023/06/20 10:02:42 checking revisions... [ 38.169097] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:02:42 testing simple program... [ 38.211720] cgroup: Unknown subsys name 'net' [ 38.252625] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:02:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ff5617255b0 CR3=000000000d9f8000 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=2031343a32303a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a32303a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b40 RCX=0000000000000001 RDX=1ffff1100d9e1380 RSI=ffffffff8460144a RDI=ffff88806cf09b4c RBP=ffff88806cf09c00 RSP=ffff88806cf09a58 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff88800ef89b40 R15=ffff888010197400 RIP=ffffffff813ad4f7 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd44ed0a900 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=00007fd44f2beae8 CR3=000000000e140000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000