syzkaller login: [ 32.201026] BUG: Bad rss-counter state mm:0000000051b5e953 type:MM_FILEPAGES val:33 [ 32.201598] BUG: Bad rss-counter state mm:0000000051b5e953 type:MM_ANONPAGES val:22 [ 32.352983] ================================================================== [ 32.353899] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.354842] Read of size 8 at addr ffff8880177e2880 by task sshd/219 [ 32.355605] [ 32.355818] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.356869] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.357826] Call Trace: [ 32.358141] [ 32.358420] dump_stack_lvl+0x91/0xf0 [ 32.358941] print_report+0xcc/0x620 [ 32.359419] ? __virt_addr_valid+0x102/0x340 [ 32.359967] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.360586] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.361199] kasan_report+0xbe/0xf0 [ 32.361670] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.362286] vma_interval_tree_remove+0xc75/0xec0 [ 32.362903] vma_prepare+0xc54/0x11a0 [ 32.363374] __split_vma+0x5af/0x950 [ 32.363845] ? __pfx___split_vma+0x10/0x10 [ 32.364382] ? find_held_lock+0x2c/0x110 [ 32.364893] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.365447] ? lock_is_held_type+0x9f/0x120 [ 32.365982] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.366581] ? mtree_range_walk+0x632/0x900 [ 32.367130] ? mas_walk+0x5c7/0x7c0 [ 32.367600] do_vmi_munmap+0x1f1/0x2b0 [ 32.368095] mmap_region+0x1f9/0x2660 [ 32.368600] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.369118] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.369851] ? __pfx_lock_acquire+0x10/0x10 [ 32.370383] ? __pfx_mmap_region+0x10/0x10 [ 32.370910] ? security_mmap_addr+0x7d/0xa0 [ 32.371437] ? get_unmapped_area+0x1f5/0x3f0 [ 32.371978] do_mmap+0x854/0xf00 [ 32.372429] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.372923] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.373481] ksys_mmap_pgoff+0x3af/0x500 [ 32.373984] do_syscall_64+0x3f/0x90 [ 32.374460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.375154] RIP: 0033:0x7fccdd82bd82 [ 32.375610] 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 [ 32.377742] RSP: 002b:00007fff68d8c948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.378667] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccdd82bd82 [ 32.379508] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccdcc65000 [ 32.380368] RBP: 00007fccdcc65000 R08: 0000000000000009 R09: 0000000000001000 [ 32.381198] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be1d8beec0 [ 32.382039] R13: 00007fff68d8c960 R14: 00007fff68d8c990 R15: 00007fff68d8ccf0 [ 32.382882] [ 32.383169] [ 32.383384] Allocated by task 212: [ 32.383805] kasan_save_stack+0x22/0x50 [ 32.384319] kasan_set_track+0x25/0x30 [ 32.384808] __kasan_slab_alloc+0x59/0x70 [ 32.385330] kmem_cache_alloc+0x16b/0x370 [ 32.385850] vm_area_dup+0x20/0x160 [ 32.386297] __split_vma+0x170/0x950 [ 32.386765] split_vma+0xc6/0x110 [ 32.387207] mprotect_fixup+0x8d2/0xb30 [ 32.387710] do_mprotect_pkey+0x87e/0xd40 [ 32.388245] __x64_sys_mprotect+0x78/0xc0 [ 32.388757] do_syscall_64+0x3f/0x90 [ 32.389221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.389862] [ 32.390079] Freed by task 0: [ 32.390448] kasan_save_stack+0x22/0x50 [ 32.390953] kasan_set_track+0x25/0x30 [ 32.391441] kasan_save_free_info+0x2b/0x50 [ 32.391971] __kasan_slab_free+0x10a/0x190 [ 32.392508] kmem_cache_free+0x10d/0x4d0 [ 32.393016] rcu_core+0x8c8/0x2860 [ 32.393460] __do_softirq+0x1b7/0x7d4 [ 32.393940] [ 32.394156] Last potentially related work creation: [ 32.394739] kasan_save_stack+0x22/0x50 [ 32.395246] __kasan_record_aux_stack+0x8e/0xa0 [ 32.395823] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.396474] remove_vma+0x139/0x170 [ 32.396918] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.397465] do_vmi_munmap+0x1f1/0x2b0 [ 32.397960] __vm_munmap+0x138/0x3a0 [ 32.398435] __x64_sys_munmap+0x59/0x80 [ 32.398927] do_syscall_64+0x3f/0x90 [ 32.399402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.400038] [ 32.400272] The buggy address belongs to the object at ffff8880177e2828 [ 32.400272] which belongs to the cache vm_area_struct of size 168 [ 32.401719] The buggy address is located 88 bytes inside of [ 32.401719] freed 168-byte region [ffff8880177e2828, ffff8880177e28d0) [ 32.403102] [ 32.403318] The buggy address belongs to the physical page: [ 32.403973] page:00000000a7ce274c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x177e2 [ 32.405060] memcg:ffff88800d79e001 [ 32.405482] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.406128] page_type: 0xffffffff() [ 32.406569] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.407468] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d79e001 [ 32.408380] page dumped because: kasan: bad access detected [ 32.409025] [ 32.409242] Memory state around the buggy address: [ 32.409810] ffff8880177e2780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.410662] ffff8880177e2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.411508] >ffff8880177e2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.412364] ^ [ 32.412771] ffff8880177e2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.413625] ffff8880177e2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.414462] ================================================================== [ 32.415638] Disabling lock debugging due to kernel taint [ 34.610553] BUG: Bad rss-counter state mm:000000007e5e53bc type:MM_FILEPAGES val:33 [ 34.611842] BUG: Bad rss-counter state mm:000000007e5e53bc type:MM_ANONPAGES val:22 [ 35.054702] BUG: Bad rss-counter state mm:000000008c789b96 type:MM_FILEPAGES val:33 [ 35.055873] BUG: Bad rss-counter state mm:000000008c789b96 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3063' (ECDSA) to the list of known hosts. 2023/06/19 22:23:11 fuzzer started 2023/06/19 22:23:11 dialing manager at localhost:44161 2023/06/19 22:23:11 checking machine... 2023/06/19 22:23:11 checking revisions... [ 35.697042] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:23:11 testing simple program... [ 35.748949] cgroup: Unknown subsys name 'net' [ 35.810391] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:23:09 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=00007fb63c710028 CR3=0000000019842000 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=2030313a33323a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a33323a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=1ffffffff0ba7a02 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002b9df16 RSP=ffff888015cef8a0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=dffffc0000000000 RIP=ffffffff812d86c0 RFL=00000212 [----A--] 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 00007f9412807900 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=00007ffebcaa3000 CR3=0000000009742000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000