syzkaller login: [ 38.773110] BUG: Bad rss-counter state mm:000000001ee2fe2c type:MM_FILEPAGES val:33 [ 38.773826] BUG: Bad rss-counter state mm:000000001ee2fe2c type:MM_ANONPAGES val:22 [ 38.901167] ================================================================== [ 38.901844] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.902508] Read of size 8 at addr ffff88800e1c2c20 by task sshd/219 [ 38.903050] [ 38.903207] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.903850] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.904529] Call Trace: [ 38.904892] [ 38.905132] dump_stack_lvl+0x91/0xf0 [ 38.905475] print_report+0xcc/0x620 [ 38.905826] ? __virt_addr_valid+0x102/0x340 [ 38.906214] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.906657] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907114] kasan_report+0xbe/0xf0 [ 38.907471] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907905] vma_interval_tree_remove+0xc75/0xec0 [ 38.908335] vma_prepare+0xc54/0x11a0 [ 38.908667] __split_vma+0x5af/0x950 [ 38.908996] ? __pfx___split_vma+0x10/0x10 [ 38.909354] ? find_held_lock+0x2c/0x110 [ 38.909715] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.910162] ? lock_is_held_type+0x9f/0x120 [ 38.910543] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.910998] ? mtree_range_walk+0x632/0x900 [ 38.911379] ? mas_walk+0x5c7/0x7c0 [ 38.911733] do_vmi_munmap+0x1f1/0x2b0 [ 38.912085] mmap_region+0x1f9/0x2660 [ 38.912424] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.912793] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.913297] ? __pfx_lock_acquire+0x10/0x10 [ 38.913675] ? __pfx_mmap_region+0x10/0x10 [ 38.914049] ? security_mmap_addr+0x7d/0xa0 [ 38.914420] ? get_unmapped_area+0x1f5/0x3f0 [ 38.914812] do_mmap+0x854/0xf00 [ 38.915124] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.915531] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.915921] ksys_mmap_pgoff+0x3af/0x500 [ 38.916287] do_syscall_64+0x3f/0x90 [ 38.916632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917103] RIP: 0033:0x7f8f8420cd82 [ 38.917427] 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 [ 38.918950] RSP: 002b:00007ffd3c76b5e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.919628] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f8420cd82 [ 38.920228] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f83646000 [ 38.920844] RBP: 00007f8f83646000 R08: 0000000000000009 R09: 0000000000001000 [ 38.921443] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0d9f85ec0 [ 38.922056] R13: 00007ffd3c76b600 R14: 00007ffd3c76b630 R15: 00007ffd3c76b990 [ 38.922674] [ 38.922889] [ 38.923057] Allocated by task 212: [ 38.923360] kasan_save_stack+0x22/0x50 [ 38.923774] kasan_set_track+0x25/0x30 [ 38.924126] __kasan_slab_alloc+0x59/0x70 [ 38.924531] kmem_cache_alloc+0x16b/0x370 [ 38.924906] vm_area_dup+0x20/0x160 [ 38.925236] __split_vma+0x170/0x950 [ 38.925555] split_vma+0xc6/0x110 [ 38.925865] mprotect_fixup+0x8d2/0xb30 [ 38.926217] do_mprotect_pkey+0x87e/0xd40 [ 38.926575] __x64_sys_mprotect+0x78/0xc0 [ 38.926936] do_syscall_64+0x3f/0x90 [ 38.927266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927730] [ 38.927880] Freed by task 212: [ 38.928144] kasan_save_stack+0x22/0x50 [ 38.928491] kasan_set_track+0x25/0x30 [ 38.928831] kasan_save_free_info+0x2b/0x50 [ 38.929199] __kasan_slab_free+0x10a/0x190 [ 38.929561] kmem_cache_free+0x10d/0x4d0 [ 38.929895] rcu_core+0x8c8/0x2860 [ 38.930193] __do_softirq+0x1b7/0x7d4 [ 38.930531] [ 38.930690] Last potentially related work creation: [ 38.931081] kasan_save_stack+0x22/0x50 [ 38.931521] __kasan_record_aux_stack+0x8e/0xa0 [ 38.931836] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.932184] remove_vma+0x139/0x170 [ 38.932427] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.932749] do_vmi_munmap+0x1f1/0x2b0 [ 38.933013] __vm_munmap+0x138/0x3a0 [ 38.933267] __x64_sys_munmap+0x59/0x80 [ 38.933535] do_syscall_64+0x3f/0x90 [ 38.933794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.934140] [ 38.934257] Second to last potentially related work creation: [ 38.934629] kasan_save_stack+0x22/0x50 [ 38.934908] __kasan_record_aux_stack+0x8e/0xa0 [ 38.935261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.935642] remove_vma+0x139/0x170 [ 38.935890] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.936194] do_vmi_munmap+0x1f1/0x2b0 [ 38.936459] mmap_region+0x1f9/0x2660 [ 38.936717] do_mmap+0x854/0xf00 [ 38.936948] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.937215] ksys_mmap_pgoff+0x3af/0x500 [ 38.937485] do_syscall_64+0x3f/0x90 [ 38.937745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938091] [ 38.938208] The buggy address belongs to the object at ffff88800e1c2bc8 [ 38.938208] which belongs to the cache vm_area_struct of size 168 [ 38.939008] The buggy address is located 88 bytes inside of [ 38.939008] freed 168-byte region [ffff88800e1c2bc8, ffff88800e1c2c70) [ 38.939963] [ 38.940105] The buggy address belongs to the physical page: [ 38.940532] page:0000000095df55ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1c2 [ 38.941263] memcg:ffff88800ecf2401 [ 38.941550] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.942045] page_type: 0xffffffff() [ 38.942383] raw: 0100000000000200 ffff8880087a0c80 ffffea0000382cc0 dead000000000003 [ 38.943051] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecf2401 [ 38.943702] page dumped because: kasan: bad access detected [ 38.944171] [ 38.944313] Memory state around the buggy address: [ 38.944690] ffff88800e1c2b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.945281] ffff88800e1c2b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.945863] >ffff88800e1c2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.946435] ^ [ 38.946815] ffff88800e1c2c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.947385] ffff88800e1c2d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.947960] ================================================================== [ 38.948776] Disabling lock debugging due to kernel taint [ 40.428424] BUG: Bad rss-counter state mm:00000000a4e19192 type:MM_FILEPAGES val:33 [ 40.429296] BUG: Bad rss-counter state mm:00000000a4e19192 type:MM_ANONPAGES val:22 [ 40.821762] BUG: Bad rss-counter state mm:00000000fafa97bf type:MM_FILEPAGES val:33 [ 40.822472] BUG: Bad rss-counter state mm:00000000fafa97bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15275' (ECDSA) to the list of known hosts. 2023/06/21 09:18:05 fuzzer started 2023/06/21 09:18:05 dialing manager at localhost:36067 2023/06/21 09:18:05 checking machine... 2023/06/21 09:18:05 checking revisions... [ 41.379518] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:18:05 testing simple program... [ 41.420123] cgroup: Unknown subsys name 'net' [ 41.471545] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:18:05 Registers: info registers vcpu 0 RAX=ffffffff8363e064 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff8363e064 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a88c R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888016a2d1c0 R15=ffff88800d5747a0 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 00007fb457eb0900 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=00007fb458467618 CR3=000000000ec32000 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=1ffff110012eee39 RBX=ffff888009777198 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880097771c8 RBP=ffff8880160a1828 RSP=ffff888008e37c98 R8 =0000000000000001 R9 =ffffed10011c6f87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888016020000 R14=ffffffff818d9c06 R15=ffff88800da1b680 RIP=ffffffff818464ec RFL=00000046 [---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 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=00007f84defbe000 CR3=000000000f212000 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=2035303a38313a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a38313a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000