syzkaller login: [ 35.752763] BUG: Bad rss-counter state mm:00000000e839bf17 type:MM_FILEPAGES val:33 [ 35.755029] BUG: Bad rss-counter state mm:00000000e839bf17 type:MM_ANONPAGES val:22 [ 35.921349] ================================================================== [ 35.922310] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.923293] Read of size 8 at addr ffff88800db6b5c8 by task sshd/222 [ 35.924296] [ 35.924540] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.925490] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.926539] Call Trace: [ 35.926876] [ 35.927175] dump_stack_lvl+0x91/0xf0 [ 35.927703] print_report+0xcc/0x620 [ 35.928224] ? __virt_addr_valid+0x102/0x340 [ 35.928813] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.929464] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.930102] kasan_report+0xbe/0xf0 [ 35.930598] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.931254] vma_interval_tree_remove+0xc75/0xec0 [ 35.931900] vma_prepare+0xc54/0x11a0 [ 35.932401] __split_vma+0x5af/0x950 [ 35.932897] ? __pfx___split_vma+0x10/0x10 [ 35.933459] ? find_held_lock+0x2c/0x110 [ 35.934011] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.934608] ? lock_is_held_type+0x9f/0x120 [ 35.935185] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.935832] ? mtree_range_walk+0x632/0x900 [ 35.936404] ? mas_walk+0x5c7/0x7c0 [ 35.936932] do_vmi_munmap+0x1f1/0x2b0 [ 35.937456] mmap_region+0x1f9/0x2660 [ 35.937958] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.938493] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.939243] ? __pfx_lock_acquire+0x10/0x10 [ 35.939810] ? __pfx_mmap_region+0x10/0x10 [ 35.940365] ? security_mmap_addr+0x7d/0xa0 [ 35.940926] ? get_unmapped_area+0x1f5/0x3f0 [ 35.941507] do_mmap+0x854/0xf00 [ 35.941978] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.942499] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.943091] ksys_mmap_pgoff+0x3af/0x500 [ 35.943641] do_syscall_64+0x3f/0x90 [ 35.944139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.944819] RIP: 0033:0x7ff8d7096d82 [ 35.945300] 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 [ 35.947554] RSP: 002b:00007ffdfbc2a378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.948501] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8d7096d82 [ 35.949419] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8d64d0000 [ 35.950395] RBP: 00007ff8d64d0000 R08: 0000000000000009 R09: 0000000000001000 [ 35.951477] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a550cafec0 [ 35.952593] R13: 00007ffdfbc2a390 R14: 00007ffdfbc2a3c0 R15: 00007ffdfbc2a720 [ 35.953724] [ 35.954096] [ 35.954368] Allocated by task 215: [ 35.954928] kasan_save_stack+0x22/0x50 [ 35.955581] kasan_set_track+0x25/0x30 [ 35.956226] __kasan_slab_alloc+0x59/0x70 [ 35.956932] kmem_cache_alloc+0x16b/0x370 [ 35.957599] vm_area_dup+0x20/0x160 [ 35.958191] __split_vma+0x170/0x950 [ 35.958792] split_vma+0xc6/0x110 [ 35.959299] mprotect_fixup+0x8d2/0xb30 [ 35.959822] do_mprotect_pkey+0x87e/0xd40 [ 35.960371] __x64_sys_mprotect+0x78/0xc0 [ 35.960935] do_syscall_64+0x3f/0x90 [ 35.961427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.962104] [ 35.962332] Freed by task 215: [ 35.962746] kasan_save_stack+0x22/0x50 [ 35.963277] kasan_set_track+0x25/0x30 [ 35.963802] kasan_save_free_info+0x2b/0x50 [ 35.964347] __kasan_slab_free+0x10a/0x190 [ 35.964966] kmem_cache_free+0x10d/0x4d0 [ 35.965506] rcu_core+0x8c8/0x2860 [ 35.965963] __do_softirq+0x1b7/0x7d4 [ 35.966456] [ 35.966681] Last potentially related work creation: [ 35.967306] kasan_save_stack+0x22/0x50 [ 35.967830] __kasan_record_aux_stack+0x8e/0xa0 [ 35.968428] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.969133] remove_vma+0x139/0x170 [ 35.969615] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.970190] do_vmi_munmap+0x1f1/0x2b0 [ 35.970699] __vm_munmap+0x138/0x3a0 [ 35.971189] __x64_sys_munmap+0x59/0x80 [ 35.971712] do_syscall_64+0x3f/0x90 [ 35.972208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.972894] [ 35.973120] The buggy address belongs to the object at ffff88800db6b570 [ 35.973120] which belongs to the cache vm_area_struct of size 168 [ 35.974670] The buggy address is located 88 bytes inside of [ 35.974670] freed 168-byte region [ffff88800db6b570, ffff88800db6b618) [ 35.976133] [ 35.976355] The buggy address belongs to the physical page: [ 35.977105] page:0000000092b47c86 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb6b [ 35.978247] memcg:ffff888013f04801 [ 35.978697] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.979387] page_type: 0xffffffff() [ 35.979861] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 35.980856] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f04801 [ 35.981832] page dumped because: kasan: bad access detected [ 35.982541] [ 35.982770] Memory state around the buggy address: [ 35.983394] ffff88800db6b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.984318] ffff88800db6b500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 35.985234] >ffff88800db6b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.986144] ^ [ 35.986847] ffff88800db6b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.987759] ffff88800db6b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.988666] ================================================================== [ 35.989708] Disabling lock debugging due to kernel taint [ 37.910091] BUG: Bad rss-counter state mm:000000005c1c967a type:MM_FILEPAGES val:33 [ 37.910794] BUG: Bad rss-counter state mm:000000005c1c967a type:MM_ANONPAGES val:22 [ 38.347451] BUG: Bad rss-counter state mm:00000000ee47075a type:MM_FILEPAGES val:32 [ 38.348276] BUG: Bad rss-counter state mm:00000000ee47075a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31962' (ECDSA) to the list of known hosts. 2023/06/20 04:12:45 fuzzer started 2023/06/20 04:12:46 dialing manager at localhost:44161 2023/06/20 04:12:46 checking machine... 2023/06/20 04:12:46 checking revisions... [ 39.073131] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:12:46 testing simple program... [ 39.120174] cgroup: Unknown subsys name 'net' [ 39.183915] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:12:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c136d RSI=ffffffff818cfd90 RDI=ffff88806ce09b68 RBP=000000000000000e RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000241ad R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888017c83680 R15=ffff88801a360670 RIP=ffffffff813ad46e 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 00007fc299223900 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=00007fc2997da618 CR3=000000001c810000 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=563412feff00545000000000000080fe 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=ffff888008c58400 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=00007f485027d690 CR3=00000000097de000 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=02c777140a52a98dd849959f9549fe7b XMM02=000000000011d398eff9b2d0a8fce9cb XMM03=000000000011d4682c67c8bc2e329bc3 XMM04=5c69efbedc028fb800000000000ae988 XMM05=59d5b690e0af863b00000000001344a8 XMM06=00c3ffa147b8d8570000000000134330 XMM07=e042d86d42eb936e0000000000124b28 XMM08=9875e6279adcc818000000000011d468 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000